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INTEGRATED CIRCUITS
DATA SHEET
TDA4780 RGB video processor with automatic cut-off control and gamma adjust
Preliminary specification Supersedes data of May 1994 File under Integrated Circuits, IC02 1997 Feb 06
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
FEATURES * Gamma adjust * Dynamic black control (adaptive black) * All input signals clamped on black-levels * Automatic cut-off control, alternative: output clamping on fixed levels * Three adjustable reference voltage levels via I2C-bus for automatic cut-off control * Luminance/colour difference interface * Two luminance input levels allowed * Two RGB interfaces controlled by either fast switches or by I2C-bus * Two peak drive limiters, selection via * Blue stretch, selection via I2C-bus * Luminance output for scan velocity modulation (SCAVEM) * Extra luminance output; same pin can be used as hue control output e.g. for the TDA4650 and TDA4655 * Non standard operations like 50 Hz/32 kHz are also possible * Either 2 or 3 level sandcastle pulse applicable * High bandwidth for 32 kHz application * White point adjusts via I2C-bus * Average beam current and improved peak drive limiting * Two switch-on delays to prevent discoloration during start-up * All functions and features programmable via I2C-bus * PAL/SECAM or NTSC matrix selection. GENERAL DESCRIPTION The TDA4780 is a monolithic integrated circuit with a luminance and a colour difference interface for video processing in TV receivers. Its primary function is to process the luminance and colour difference signals from a colour decoder which is equipped e.g. with the multistandard decoder TDA4655 or TDA9160 plus delay line TDA4661 or TDA4665 and the Picture Signal Improvement (PSI) IC TDA467X or from a feature module. I2C-bus The required input signals are:
TDA4780
* Luminance and negative colour difference signals * 2 or 3-level sandcastle pulse for internal timing pulse generation * I2C-bus data and clock signals. Two sets of analog RGB colour signals can also be inserted, e.g. one from a peritelevision connector (SCART plug) and the other one from an On-Screen Display (OSD) generator. The TDA4780 has I2C-bus control of all parameters and functions with automatic cut-off control of the picture tube cathode currents. It provides RGB output signals for the video output stages. In clamped output mode it can also be used as an RGB source. The main differences with the sister type TDA4680 are: * Additional features, namely gamma adjust, adaptive black, blue stretch and two different peak drive limiters * The measurement lines are triggered by the trailing edge of the vertical component of the sandcastle pulse * I2C-bus receiver only. Automatic white level control is not provided; the white levels are determined directly by the I2C-bus data. * The TDA4780 is pin compatible (except pin 18) with the TDA4680. The I2C-bus slave address can be used for both ICs. When a function of the TDA4780 is not included in the TDA4680, the I2C-bus command is not executed. Special commands (except control bit FSWL) for the TDA4680 will be ignored by the TDA4780.
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
QUICK REFERENCE DATA SYMBOL VP IP V8(p-p) V6(p-p) V7(p-p) V14 supply voltage (pin 5) supply current (pin 5) luminance input (peak-to-peak value) (C)VBS -(B - Y) input (peak-to-peak value) -(R - Y) input (peak-to-peak value) three-level sandcastle pulse H+V H BK two-level sandcastle pulse H+V BK Vi Vo(p-p) Tamb RGB output at pins 24, 22 and 20 (black-to-white value) operating ambient temperature - - - -20 2.5 4.5 0.7 2.0 - - - - 2.5 4.5 8.0 PARAMETER MIN. 7.2 80 - - - TYP. 8.0 100 1.33 1.05
TDA4780
MAX. 8.8 120 - - - - - - - - - +70
UNIT V mA V V V V V V V V V V C
0.45/1.43 -
RGB input signals at pins 2, 3, 4, 10, 11 and 12 (black-to-white value) -
ORDERING INFORMATION TYPE NUMBER TDA4780 PACKAGE NAME DIP28 DESCRIPTION plastic dual in-line package; 28 leads (600 mil) VERSION SOT117-1
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
BLOCK DIAGRAM
TDA4780
handbook, full pagewidth
FSW1 FSW2
peak dark storage 1 F
Y - output / hue adjust output
VP = 8 V 200 F
FSW1 13
FSW2 1
CPDST 18
YHUE 26
GND 9
VP 5
TDA4780
SUPPLY
YEXH R1 G1 B1 10 nF 10 nF 10 nF R1 10 G1 11 B1 12 CLAMP HUE ADJUST
BANDGAP REFERENCE UGAP
R2 G2 B2
10 nF 10 nF 10 nF
R2 2 G2 3 B2 4 Y CLAMP INPUT SELECTOR Y - MATRIX Y ADAPTIVE BLACK ADBL YBL gamma Y BL R SATURATION ADJUST G B
a
GAMMA
b c d
-(B - Y) -(R - Y) Y
10 nF -(B - Y) 6 10 nF -(R - Y) 7 47 nF Y8 CLAMP 0.45 V 1.43 V Y
R PAL / SECAM G NTSC MATRIX B FSDIS1 FSON1 FSON2 NMEN FSDIS2
R G B COLOUR DIFFERENCE MATRIX
R-Y G-Y B-Y
e f
DELOF HDTV SC5 FSBL YHI
YEXH RELC BCOF TCPL
8 DATA CONTROL REGISTERS
6 DATA
REGISTERS DIGITAL TO ANALOG CONVERTERS
g UGAP CL SC5 BREN I2C-BUS RECEIVER V DELOF SANDCASTLE DETECTOR HV (H)
h i j
28 SCL
27 SDA
14 SC
MGE875
I2C-bus
sandcastle input
Fig.1 Block diagram (continued in Fig.2).
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
TDA4780
handbook, full pagewidth
average beam current limiting input
peak drive limiting storage 1 F
BCL 15
CPDL 16 PEAK DRIVE LIMITER ABSOLUTE LEVEL
AVERAGE BEAM CURRENT LIMITING
RELC PEAK DRIVE LIMITER CUT-OFF RELATED
TDA4780
MINIMUM DETECTOR
VOLTAGE COMPARATOR a
VOLTAGE COMPARATOR
TCPL
RELC
WHITE POINT ADJUST
R OUTPUT BUFFER 24
RO
b c d CONTRAST ADJUST
R G B BRIGHTNESS ADJUST
R G B
MP BLANK WHITE POINT ADJUST RGB outputs to video amplifiers
G OUTPUT BUFFER 22
GO
MOD2 e f
B
B BLUE STRETCH
MP BLANK WHITE POINT ADJUST
B OUTPUT BUFFER 20 BO
REGISTERS DIGITAL ANALOG CONVERTERS BCOF g NMEN BLANK FSBL HDTV MP CL HV (H) TIMING GENERATOR 1st AND 2nd SWITCH-ON DELAY
MP BLANK UGAP BCOF
CUT-OFF CONTROL
OUTPUT CLAMP 19 CI
h i j
leakage and cut - off current input 82 k
LEAKAGE CURRENT COMPARATOR UGAP
17 CL 330 nF leakage storage
21 CB 220 nF
23 CG 220 nF
25 CR 220 nF
MGE876
cut-off storage
Fig.2 Block diagram (continued from Fig.1).
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
PINNING SYMBOL FSW2 R2 G2 B2 VP -(B - Y) -(R - Y) Y GND R1 G1 B1 FSW1 SC BCL CPDL CL CPDST CI BO CB GO CG RO CR YHUE SDA SCL PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 fast switch 2 input red input 2 green input 2 blue input 2 supply voltage colour difference input -(B - Y) colour difference input -(R - Y) luminance input ground red input 1 green input 1 blue input 1 fast switch 1 input sandcastle pulse input average beam current limiting input storage capacitor for peak limiting storage capacitor for leakage current compensation storage capacitor for peak dark cut-off measurement input blue output blue cut-off storage capacitor green output green cut-off storage capacitor red output red cut-off storage capacitor Y-output/hue adjust output I2C-bus serial data input/acknowledge output I2C-bus serial clock input
fpage
TDA4780
DESCRIPTION
FSW2 R2 G2 B2 VP
1 2 3 4 5 6 7
28 SCL 27 SDA 26 YHUE 25 CR 24 RO 23 CG 22 GO
-(B - Y) -(R - Y) Y GND
TDA4780
8 9 21 CB 20 BO 19 CI 18 CPDST 17 CL 16 CPDL 15 BCL
MGE874
R1 10 G1 11 B1 12 FSW1 13 SC 14
Fig.3 Pin configuration.
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
FUNCTIONAL DESCRIPTION Signal input stages The TDA4780 contains 3 sets of input signal stages for: 1. Luminance/colour-difference signals: a) Y: 0.45 V (p-p) VBS or 1.43 V (p-p) VBS, selectable via I2C-bus. b) -(R - Y): 1.05 V (p-p). c) -(B - Y): 1.33 V (p-p). The capacitively coupled signals are matrixed to RGB signals by either a PAL/SECAM or NTSC matrix (selected via I2C-bus). 2. (RGB)1 signals (0.7 V (p-p) VB), capacitively coupled (e.g. from external source). 3. (RGB)2 signals (0.7 V (p-p) VB), capacitively coupled (e.g. videotext, OSD). All input signals are clamped in order to have the same black levels at the signal switch input. Displayed signals must be synchronous with the sandcastle pulse. Signal switches Both fast signal switches can be operated by switching pins (e.g. SCART facilities) or set via the I2C-bus. With the pin FSW1 the Y-CD signals or the (RGB)1 signals can be selected, with pin FSW2 the above selected signals or the (RGB)2 signals are enabled. During the vertical and horizontal blanking time an artificial black level equal to the clamped black level is inserted in order to clip off the sync pulse of the luminance signal and to suppress hum during the cut-off measurement time and eliminate noise during these intervals. Saturation, contrast and brightness adjust Saturation, contrast and brightness adjusts are controlled via the I2C-bus and act on Y, CD as well as on RGB input signals. Gamma acts on the luminance content of the input signals. Gamma adjust The gamma adjust stage has a non-linear transmission characteristic according to the formula y = xgamma, where x represents the input and y the output signal. If gamma is smaller than unity, the lower parts of the signal are amplified with higher gain. Adaptive black (ADBL)
TDA4780
The adaptive black stage detects the lowest voltage of the luminance component of the internal RGB signals during the scanning time and shifts it to the nominal black level. In order to keep the nominal white level the contrast is increased simultaneously. Blue stretch (BLST) The blue stretch channel gets additional amplification if the blue signal is greater than 80% of the nominal signal amplitude. In the event the white point is shifted towards higher colour temperature so that white parts of a picture seem to be brighter. Measurement pulse and blanking stage During the vertical and horizontal blanking time and the measurement period the signals are blanked to an ultra black level, so the leakage current of the picture tube can be measured and automatically compensated for. During the cut-off measurement lines (one line period for each R, G or B) the output signal levels are at cut-off measurement level. The vertical blanking period is timed by the sandcastle pulse. The measurement pulses (leakage, R, G and B) are triggered by the negative going edge of the vertical pulse of the sandcastle pulse and start after the following horizontal pulse. The IC is prepared for 2fH (32 kHz) application. Output amplifier and white adjust potentiometer The RGB signals are amplified to nominal 2 V (p-p), the DC-levels are shifted according to cut-off control. The nominal signal amplitude can be varied by 50% by the white point adjustment via the I2C-bus (individually for RGB respect).
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
Automatic cut-off control During leakage measurement time the leakage current is compensated in order to get a reference voltage at the cut-off measurement info pin. This compensation value is stored in an external capacitor. During cut-off current measurement times for the R, G and B channels, the voltage at this pin is compared with the reference voltage, which is individually adjustable via I2C-bus for each colour channel. The control voltages that are derived in this way are stored in the external feedback capacitors. Shift stages add these voltages to the corresponding output signals. The automatic cut-off control may be disabled via the I2C-bus. In this mode the output voltage is clamped to 2.5 V. Clamping periods are the same as the cut-off measurement periods. Signal limiting The TDA4780 provides two kinds of signal limiting. First, an average beam limiting, that reduces signal level if a certain average is exceeded. Second, a peak drive limiting, that is activated if one of the RGB signals even shortly exceeds a via I2C-bus adjusted threshold. The latter can be either referred to the cut-off measurement level of the outputs or to ground. When signal limiting occurs, contrast is reduced, and at minimum contrast brightness is reduced additionally. Sandcastle decoder and timer A 3-level detector separates the sandcastle pulse into combined line and field pulses, line pulses, and clamping pulses. The timer contains a line counter and controls the cut-off control measurement. Application with a 2-level 5 V sandcastle pulse is possible. Switch on delay circuit
TDA4780
After switch on all signals are blanked and a warm up test pulse is fed to the outputs during the cut-off measurement lines. If the voltage at the cut-off measurement input exceeds an internal level the cut-off control is enabled but the signal remains still blanked. In the event of output clamping, the cut-off control is disabled and the switch on procedure will be skipped. Y output and hue adjust The TDA4780 contains a D/A converter for hue adjust. The analog information can be fed, e.g. to the multistandard decoder TDA4650 or TDA4655. This output pin may be switched to a Y output signal, which can be used for scan velocity modulation (SCAVEM). The Y output is the Y input signal or the matrixed (RGB) input signal according to the switch position of the fast switch. I2C-bus The TDA4780 contains an I2C-bus receiver for control function. ESD protection The Pins are provided with protection diodes against ground and supply voltage (see Chapter "Internal pin configurations"). I2C-bus input pins do not shunt the I2C-bus signals in the event of missing supply voltage. EMC The pins are protected against electromagnetic radiation.
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
I2C-BUS RECEIVER Table 1 A6 1 Note 1. Explanation for the cell contents of the table: a) W means write. Table 2 S Slave receiver format (write mode; BREN = 0); note 1 A SUBADDRESS(2) A Slave address; note 1 A5 0 A4 0 A3 0 A2 1 A1 0 A0 0
TDA4780
W 0
SLAVE ADDRESS
DATA BYTE n data bytes with auto-increment of subaddresses
AP
Notes 1. Explanation for the cell contents of the table: a) S means START condition. b) P means STOP condition. c) A means acknowledge. 2. All subaddresses within the range 00H to 0FH are automatically incremented. The subaddress counter wraps around from 0FH to 00H. Only in this event 0FH will be acknowledged. Subaddresses outside the range 00H to 0EH are not acknowledged by the device and neither auto-increment nor any other internal operation takes place. All eight bits of the subaddress have to be decoded by the device. Table 3 S Slave receiver format (write mode; BREN = 1); note 1 A SUBADDRESS A DATA BYTE(2) AP
SLAVE ADDRESS
Notes 1. Explanation for the cell contents of the table: a) S means START condition. b) P means STOP condition. c) A means acknowledge. 2. Auto-increment is not possible.
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
TDA4780
handbook, full pagewidth
MSB 1 0 0 0 1 0
LSB 0 X R/W
MED696
ACK
module address
Fig.4 The module address byte.
handbook, full pagewidth
STA
MAD SAD
STO
MED697
START condition
data byte
STOP condition
Fig.5 Data transmission without auto-increment (BREN = 0 or 1).
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STA START condition
MAD SAD
STO
MED698
data byte data bytes
STOP condition
Fig.6 Data transmission with auto-increment (BREN = 0)
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
Table 4
TDA4780
Signal input selection and effect on adaptive black measurements by fast source switches and I2C-bus; note 1 ANALOG SWITCH FSW2 (pin 1) L L H FSW1 (pin 13) L H X X X X X L H X X X X ON ON ON ON ON ON RGB2 (pins 2, 3 and 4) SELECTED SIGNALS ADBL active active inactive active inactive active inactive active active active active active inactive active ON ON ON ON ON ON ON RGB1 (pins 10, 11 and 12) TV (pins 6, 7 and 8) ON
I2C-BUS CONTROLLED BITS FSON2 FSDIS2 FSON1 FSDIS1 L L L L
L L L L L H H Note
L L H H H L H
L H L L H X X
H X L H X X X
L H L H X X X X L H X
1. Explanation for the cell contents of the table: a) H = set to logic 1 or analog switch (pins 1 and 13) to >0.9 V. b) L = set to logic 0 or analog switch (pins 1 and 13) to <0.4 V. c) X = don't care. d) ON = this signal is selected.
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
Table 5 FSW1 L L L H Crosstalk; note 1 FSW2 L H H H CROSSTALK RGB1 Y, CD RGB2 Y, CD Y, CD RGB1 RGB2 RGB1 Y, CD RGB2 RGB1 RGB2 Y, CD RGB2 RGB1 RGB2 Note 1. Explanation for the cell contents of the table: a) H = set to logic 1. b) L = set to logic 0. Table 6 Subaddress byte and data byte format; notes 1 and 2 DATA BYTE FUNCTION Brightness Saturation Contrast Hue Red gain Green gain Blue gain Red level reference Green level reference Blue level reference Peak drive limit Gamma Control register 1 Control register 2 Control register 3 Notes 1. Explanation for the cell contents of the table: a) L = set to logic 0. SUBADDRESS D7 00H 01H 02H 03H 04H 05H 06H 07H 08H 09H 0AH 0BH 0CH 0DH 0EH L L L L L L L L L L L L SC5 X ADBL D6 L L L L L L L L L L L L DELOF HDTV YHI D5 A05 A15 A25 A35 A45 A55 A65 A75 A85 A95 AA5 AB5 BREN FSBL MOD2 D4 A04 A14 A24 A34 A44 A54 A64 A74 A84 A94 AA4 AB4 X BCOF BLST D3 A03 A13 A23 A33 A43 A53 A63 A73 A83 A93 AA3 AB3 NMEN YEXH D2 A02 A12 A22 A32 A42 A52 A62 A72 A82 A92 AA2 AB2 X RELC AT 4 MHz MAXIMUM VALUE (dB) -58 -58 -51 -58 -51 -58 -51 -58 AT 8 MHz MAXIMUM VALUE (dB) -55 -55 -50 -55 -50 -55 -50 -55
TDA4780
AT 13 MHz MAXIMUM VALUE (dB) -50 -50 -47 -50 -47 -50 -47 -50
D1 A01 A11 A21 A31 A41 A51 A61 A71 A81 A91 AA1 AB1 X TCPL
D0(3) A00 A10 A20 A30 A40 A50 A60 A70 A80 A90 AA0 AB0 X L
FSDIS2 FSON2 FSDIS1 FSON1
b) X means don't care but for software compatibility with further video ICs with the same slave address, it is recommended to set all these bits to logic 0. 2. After power on reset all alignment registers are set to 01H. 3. The least significant bit of the analog alignment register. 1997 Feb 06 12
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
Table 7 RGB processor mode bits control register PARAMETER CONDITIONS
TDA4780
SYMBOL Control register 1 SC5 DELOF BREN
sandcastle 5 V delay of leading edge of clamping pulse switched off buffer register enable
0 = 3-level sandcastle pulse 1 = 2-level sandcastle pulse 0 = delay 1 = no delay 0 = new data are executed just after reception 1 = data is held in a latch (buffer register) and will be transferred to their destination register within the next vertical blanking interval; the device does not acknowledge any new data transfer until the internal transfer to the destination register has been completed
NMEN
NTSC matrix enable; note 1
0 = PAL matrix 1 = NTSC matrix; hue position set on -2 degrees
Control register 2 HDTV FSBL BCOF FSON2 FSDIS1 FSDIS2 FSON1 HDTV / progressive scan for ADBL line counter full screen black level, e.g. for optical measurement internal black level control off fast switch 2 on fast switch 1 disable fast switch 2 disable fast switch 1 on 0 = 272 (PAL), 224 (NTSC) lines 1 = 544 (PAL), 448 (NTSC) lines 0 = normal mode 1 = cut-off measurement level during full field, brightness inactive 0 = automatic cut-off control active 1 = RGB outputs clamped to fixed DC levels see Table 4
Control register 3 ADBL YHI MOD2 adaptive black Y high level modus 2 0 = off 1 = on 0 = input = 0.315 V (p-p) (black-white) 1 = input = 1.0 V (p-p) (black-white) 0 = inactive; (BCOF = 0) AND (MOD2 = 1) is senseless, no output stabilization 1 = output clamp without brightness adjust, brightness remains active e.g. for blue stretch BLST YEXH RELC TCPL blue stretch Y exclusive hue relative to cut-off 0 = off 1 = on 0 = pin 26 is switched to hue adjust output 1 = pin 26 is switched to Y output 0 = peak drive limit to absolute output 1 = peak drive limit relative to cut-off time constant peak drive limiter 0 = 2fH 1 = 1fH 1997 Feb 06 13
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
Note
TDA4780
1. Matrix coefficients should be tested by comparing RGB output signals with a reference RGB colour bar, which is fed in at (RGB)1 or (RGB)2 inputs. In the event of NMEN = 1 (NTSC) at minimum saturation the Y output and RGB output signals are not identical to the Y input signal. PAL/SECAM signals are matrixed by the equation: VG - Y = -0.51VR - Y - 0.19VB - Y NTSC signals are matrixed by the equations (hue phase shift of -2 degrees): VR - Y* = 1.39VR - Y - 0.07VB - Y; VG - Y* = -0.46VR - Y - 0.15VB - Y; VB - Y* = VB - Y For demodulation axis see Fig.11. In the matrix equations: VR - Y and VB - Y are conventional PAL demodulation axes and amplitudes at the output of the demodulator. VR - Y*, VG - Y* and VB - Y* are the NTSC-modified colour-difference signals.
handbook, full pagewidth
maximum brightness nominal brightness
cut-off measurement line for green signal
ultra-black
MGE878
Fig.7 Cut-off measurement pulses.
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
TDA4780
handbook, full pagewidth
nominal white level
nominal black level input signal adaptive black level control
MGE879
Fig.8 Principle of adaptive black control.
handbook, full pagewidth
R
G
B
MGE880
Fig.9 Principle of blue stretch.
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
TDA4780
handbook, full pagewidth
sandcastle pulse with vertical component timing controlled by sandcastle pulse R channel
LM MR
G channel
LM MG
B channel
LM MB MT DG
MGE881
LM = leakage current measurement time. MR, MG, MB = R, G, B cut-off measurement pulses. MT = measurement time. DG = internal blanking.
Fig.10 Pulse diagram.
handbook, full pagewidth
V-axis (R - Y) 1.14 / 90 PAL (R - Y) 1.59 / 95.1
V-axis NTSC-JAPAN nominal hue = -2 (B - Y) 2.03 / 0 U-axis (G - Y) 0.606 / 239.9
MGE877
(B - Y) 2.03 / 0 U-axis (G - Y) 0.698 / 236.4
Fig.11 Demodulation axes.
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VP V10, 11, 12 V2, 3, 4 V8, 7, 6 V13, 1 V25, 23, 21, 17 V14 V15 V16 V18 V19 V27, 28 I24, 22, 20 I24, 22, 20 I26 Ptot Tamb Tstg Ves Note 1. Charge device model class A: discharging a 200 pF capacitor through a 0 series resistor. THERMAL CHARACTERISTICS SYMBOL Rth j-a PARAMETER thermal resistance from junction to ambient in free air VALUE 47 (RGB)1 inputs (RGB)2 inputs Y, CD-inputs switch 1 and switch 2 input voltage black level, leakage storage sandcastle average current information peak drive storage peak dark storage cut-off control input voltage I2C-bus: SDA and SCL voltage output peak current output average current Y output/hue adjust current total power dissipation operating ambient temperature storage temperature electrostatic handling; note 1 PARAMETER supply voltage with respect to GND with respect to GND with respect to GND with respect to GND with respect to GND with respect to GND with respect to GND with respect to GND with respect to GND with respect to GND with respect to GND CONDITIONS MIN. -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.7 -0.7 -0.1 -0.1 -0.7 -0.1 -20 -10 -8 - -20 -20 -500
TDA4780
MAX. +9.0 VP VP VP VP VP VP + 5.8 VP + 0.7 VP VP VP + 0.7 VP - - - 1200 +70 +150 +500 V V V V V V V V V V V V
UNIT
mA mA mA mW C C V
UNIT K/W
QUALITY SPECIFICATION In accordance with URV-4-2-59/601. The number of the quality specification can be found in the "Quality Reference Handbook". The handbook can be ordered using the code 9397 750 00192.
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
TDA4780
CHARACTERISTICS VP = 8 V; Tamb = +25 C; Vnom: nominal signal amplitude (black-white) 2 000 mV (peak-to-peak value) at output pins; gamma = 1; adaptive black inactive; brightness, contrast, saturation and white balance at nominal settings; no beam current or peak drive limiting; all voltages are related to ground (pin 9) and measured in Figs 1 and 2; unless otherwise specified. SYMBOL VP IP PARAMETER supply voltage (pin 5) supply current (pin 5) CONDITIONS MIN. 7.2 - TYP. 8 100 MAX. UNIT 8.8 120 V mA
Colour-difference inputs (-(B - Y): pin 6, -(R - Y): pin 7; capacitively coupled to a low-ohmic source; recommendation: maximum 600 ) V6(p-p) V6, 7 I6, 7 I6, 7 V7(p-p) R6, 7 V8(p-p) -(B - Y) signal (peak-to-peak value) internal bias during clamping DC input current between clamping pulses maximum input current during clamping -(R - Y) signal (peak-to-peak value) AC input resistance 75% colour bar signal 75% colour bar signal - - - 100 - 10.0 1.33 4.0 - 180 1.05 - - - 0.1 260 - - V V A A V M
Y input (pin 8; capacitively coupled to a low-ohmic source; recommendation: maximum 600 ) input signal (composite signal; VBS; peak-to-peak value) adaption to two different signal levels via control bit YHI YHI = 0 YHI = 1 R8 V8 I8 I8(max)(clamp) AC input resistance internal bias during clamping DC input current between clamping pulses maximum input current during clamping YHI = 0 YHI = 1 - - 10.0 - - - 100 0.45 1.43 - 3.7 4.6 - 180 - - - - - 0.1 260 V V M V V A A
RGB input 1 (R1: pin 10, G1: pin 11, B1: pin 12; capacitively coupled to a low-ohmic source; recommendation: maximum 600 ); note 1 V10, 11, 12(p-p) R10, 11, 12 V10, 11, 12 I10, 11, 12 I10, 11, 12(clamp) input signal (peak-to-peak value) AC input resistance internal bias during clamping DC input current between clamping pulses maximum input current during clamping - 10.0 - - 100 0.7 - 5.1 - 180 - - - 0.1 260 V M V A A
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Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
SYMBOL PARAMETER CONDITIONS MIN.
TDA4780
TYP.
MAX. UNIT
RGB input 2 (R2: pin 2, G2: pin 3, B2: pin 4; capacitively coupled to a low-ohmic source; recommendation: maximum 600 ); note 1 V2, 3, 4(p-p) R2, 3, 4 V2, 3, 4 I2, 3, 4 I2, 3, 4(max)(clamp) input signal (peak-to-peak value) AC input resistance internal bias during clamping DC input current between clamping pulses maximum input current during clamping - 10.0 - - 100 0.7 - 5.1 - 180 - - - 0.1 260 V M V A A
Fast signal switches and blanking (fast signal switch 1 (pin 13); Y, CD / R1, G1, B1; control bits FSDIS1, FSON1) V13 V13 R13 ts - ti voltage to select Y and CD voltage range to select R1, G1 and B1 internal resistor to ground - 0.9 3.3 - 0 1.0 3.8 - 0.4 5.5 4.8 V V k
CROSSTALK (SEE TABLE 5) difference between transit times for signal switching and signal insertion 10 ns
Fast signal switch 2 (pin 1; Y, CD or R1, G1, B1 / R2, G2, B2; control bits FSDIS2, FSON2) V1 V1 V1 R1 ts - ti voltage to select Y and CD / R1, G1 and B1 voltage range to select R2, G2 and B2 required minimal voltage to switch off the ADBL measurement internal resistor to ground R1 > R13 - 0.9 - 2.8 - 0 1.0 0.87 4.2 - 0.4 5.5 1.0 6.0 V V V k
CROSSTALK (SEE TABLE 5) difference between transit times for signal switching and signal insertion 10 ns
Adjust stages (adaptive black, gamma, contrast, saturation, brightness and white point adjust, blue stretch) ADAPTIVE BLACK (DETECTORS INACTIVE STATUS DUE TO ACTION OF FAST SWITCH 2 (PIN 1); see Table 4, Fig.9 and note 2) I18(dch) discharge current of peak dark storage capacitor outside active measurement window inside active measurement window I18(ch) dbl(max) dbl(nom) charge current of peak dark storage capacitor maximum level shift: black level in percent of nominal signal amplitude difference between nominal black and adaptive black in percent of nominal signal amplitude detectors inactive time before blanking detectors inactive time after blanking -1.0 1.5 -360 10 -3 0.0 2.5 -300 13 0 +1.0 3.5 -250 16 +3 A A A % %
tdibb tdiab
2.3 2.3
3.1 2.5
4.0 3.4
s s
1997 Feb 06
19
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
SYMBOL PARAMETER CONDITIONS MIN.
TDA4780
TYP.
MAX. UNIT
GAMMA ADJUST (ACTS ON INTERNAL Y SIGNAL; Y MATRIX SEE Y OUTPUT; I2C-BUS CONTROLLED POTENTIOMETER (SUBADDRESS 0BH); RESOLUTION 6 BIT; note 3) dg range of gamma minimum (3FH) maximum (00H) Gmax maximum gain at minimum gamma near nominal black SATURATION ADJUST (ACTS ON RGB SIGNALS; Y MATRIX SEE Y (SUBADDRESS 01H); RESOLUTION 1.5% OF MAXIMUM SATURATION) ds(max) maximum saturation - - 5 0.7 1.0 6 - - 7 - - dB
OUTPUT; I2C-BUS CONTROLLED POTENTIOMETERS
I2C-bus data 3FH; measured at 100 kHz; relative to nominal saturation; note 4 I2C-bus data 00H; measured at 100 kHz; relative to typical value of maximum saturation
4.7
5.2
5.8
dB
ds(min)
minimum saturation
-
-
-50
dB
CONTRAST ADJUST (ACTS ON RGB SIGNALS; I2C-BUS CONTROLLED POTENTIOMETERS (SUBADDRESS 02H); RESOLUTION 1.5% OF MAXIMUM CONTRAST) dc(max) maximum contrast I2C-bus data 3FH; limiters inactive; relative to nominal contrast; note 5 I2C-bus data 00H; relative to maximum contrast - 4.5 5.5 dB
dc(min)
minimum contrast
-28
-22
-16
dB
BRIGHTNESS ADJUST (ACTS ON RGB SIGNALS; I2C-BUS CONTROLLED POTENTIOMETERS (SUBADDRESS 00H); RESOLUTION 1.5% OF RANGE; BLACK LEVEL IN PERCENT OF NOMINAL SIGNAL AMPLITUDE REFERRED TO CUT-OFF MEASURING LEVEL) dbr(max) dbr(nom) dbr(min) dbr(max) maximum brightness: black level nominal brightness: black level minimum brightness: black level maximum brightness: black level I2C-bus data 3FH I2C-bus data 29H I2C-bus I2C-bus data 00H data 3FH; control bits BCOF = 1 and MOD2 = 0 23 -7 -58 23 30 0 -50 30 37 +7 -42 37 % % % %
dbr(min)
minimum brightness: black level
I2C-bus data 00H; control bits BCOF = 1 and MOD2 = 0
-58
-50
-42
%
BLUE STRETCH (BLUE STRETCH IS ACTIVATED BY I2C-BUS CONTROL BIT BLST = 1; see Fig.9) Gbs increase of small signal gain 100% of nominal signal 15 amplitude and at 1 MHz 20 25 %
1997 Feb 06
20
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
SYMBOL PARAMETER CONDITIONS MIN.
TDA4780
TYP.
MAX. UNIT
DIFFERENCES OF BLACK LEVEL STEPS (DIFFERENCES FROM CHANNEL TO CHANNEL OF THE RATIO OF THE DIFFERENCE (BLACK LEVEL CUT-OFF MEASUREMENT LEVEL) TO ACTUAL NOMINAL SIGNAL AMPLITUDE (VNOM24, VNOM22, VNOM20) OVER THE WHOLE CONTRAST, BRIGHTNESS AND SATURATION RANGE, SWITCHING MATRIX OR SWITCHING FAST SWITCHES, GAMMA = 1, BLST = 0, ADBL = 0) V/Vnom static deviation note 6; ripple on pin 5 during clamping 1 mV; note 7 at nominal saturation -1.0 - +1.0 %
-0.5
-
+0.5
%
RGB outputs (output for positive RGB signals (R: pin 24, G: pin 2, B: pin 20); following data without external load) R24, 22, 20 I24, 22, 20(max) V24, 22, 20(min) V24, 22, 20(max) V24, 22, 20(max)(p-p) differential output resistance maximum output current minimum output voltage maximum output voltage maximum signal amplitude (black-white) due to internal limits (peak-to-peak value) nominal signal amplitude (black-white; peak-to-peak value) at nominal white adjust, contrast and saturation setting; gamma = 1; nominal input signals note 8 note 8 RL 2 k - 4.0 - 6.3 3.3 25 5.0 - 7.0 - 30 - 0.8 - - mA V V V
V24, 22, 20(max)(p-p)
1.7
2.0
2.3
V
V24, 22, 20 V24, 22, 20
cut-off measurement level recommended cut-off measurement level
1.0 -
- 3.0
5.0 -
V V
OUTPUT CLAMPING (RGB) V20, 22, 24 Gv(inc)(max) clamp voltage black level control bit BCOF = 1 I2C-bus data 3FH; relative to nominal setting; note 9 I2C-bus data 00H; relative to nominal setting; note 9 2.3 2.5 2.7 V
WHITE POTENTIOMETERS maximum increase of AC gain 40 50 60 %
Gv(dec)(max)
maximum decrease of AC gain
40
50
60
%
1997 Feb 06
21
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
SYMBOL OVERALL WHITE POINT DEVIATION V/Vnom note 10 input: (RGB)1, 2; -2.0 differences from channel to channel of the ratio of the difference (signal white level cut-off measurement level) to actual nominal signal amplitude (Vnom24, Vnom22, Vnom20) over the whole saturation range at nominal contrast, brightness and nominal input signals; ripple on pin 5 during clamping 1 mV; note 7 - PARAMETER CONDITIONS MIN.
TDA4780
TYP.
MAX. UNIT
+2.0
%
Frequency behaviour BETWEEN THE Y INPUT (PIN 8) AND THE RGB OUTPUTS (PINS 24, 22 AND 20) G decrease in gain 1 M and 20 pF load at 13 MHz - - 3 dB
BETWEEN THE COLOUR-DIFFERENCE INPUTS (PINS 7 AND 6) AND THE CORRESPONDING R AND B OUTPUTS (PINS 24 AND 20) G G decrease in gain at 13 MHz - - -100 - SC5 = 0 or SC5 = 1 SC5 = 0 SC5 = 0 SC5 = 1 2.0 4.0 6.1 4.0 - - - - 2.5 4.5 - - 3 dB
BETWEEN THE (RGB)1, 2 INPUTS (PINS 10, 11 AND 12 OR 2, 3 AND 4) AND THE RGB OUTPUTS (PINS 24, 22 AND 20) decrease in gain at 22 MHz 3 - 10 3.0 4.9 VP + 5.8 VP + 5.8 dB A pF V V V V Sandcastle input (pin 14; control bit SC5); note 11 I14 C14-9 V14 input current input capacitance required voltage range for horizontal and vertical blanking pulses for horizontal pulses (line count) for burst key pulses for burst key pulses and line count V14 < 0.5 V
1997 Feb 06
22
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
SYMBOL CLAMP PULSE DELAY Td(clamp) delay of leading edge of clamping pulse nominal sandcastle pulse DELOF = 0 DELOF = 1 REQUIRED MINIMAL BURST GATE PULSE WIDTH tW DELOF = 0 DELOF = 1 Generation of measurement lines and blanking; note 12 V/Vnom V = VCL - VUB difference between ultra black level (VUB) and measurement level (VCL) in percent of nominal signal amplitude no clipping; independent of white point adjust 25 35 line frequency: 16 kHz line frequency: 32 kHz 3 1.5 - - 1.2 - 1.5 0 PARAMETER CONDITIONS MIN.
TDA4780
TYP.
MAX. UNIT
1.8 - - -
s s s s
45
%
WARM UP TEST PULSE DURING MT (see pulse diagram Fig.10) VWU warm up level VWU = VPL - 1 V; VPL = peak drive level (see also signal limiting); given by I2C-bus; subaddress 0AH; no warm up test pulse in the event of output clamping (BCOF = 1) I2C-bus data 3FH; RELC = 0 RELC = 1 - - - -
VWU(max) VWU(fixed) V20, 22, 24(POR)
maximum warm up level fixed warm up level
6.3 5.0 - -
6.6 5.2
6.9 5.4 - -
V V
THRESHOLD FOR POWER ON RESET (POR) DURING TIME DG (see pulse diagram Fig.10) output voltage to cause POR RELC = 0 RELC = 1 Y output (pin 26; note 13) V26(nom)(p-p) nominal signal amplitude (black-white; independent of gamma, adaptive black, saturation, contrast and brightness; peak-to-peak value) black level control bit YEXH = 1; hue DAC (subaddress 03H) set to >28H YEXH = 1; I2C-bus data 3FH YEXH = 1; I2C-bus data 20H ar ag ab Y matrix coefficients Y matrix coefficients Y matrix coefficients Y = arR + agG + abB Y = arR + agG + abB Y = arR + agG + abB 0.85 1.0 1.15 V VPL 5.7 V V
V26
- - 0.27 0.53 0.10
4.0 2.0 0.30 0.59 0.11
- - 0.33 0.65 0.12
V V
1997 Feb 06
23
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
SYMBOL R26 26 fg V19 VREF0 Io19(max) Ii19(max) R19 I19 V19 VMEAS PARAMETER differential output resistance group delay time 3 dB bandwidth between RGB outputs and Y output CONDITIONS MIN. - 20 11 - during leakage measurement time LM 2.4 -350 250 1 only during warm up - 4.3 -
TDA4780
TYP. 190 25 15 - 2.7 - - - 0.5 4.5 -
MAX. UNIT 230 30 - VP - 1.4 3.0 -250 350 - - 4.7 - ns MHz
Automatic cut-off control (pin 19; measurement periods see beam info on pin 19) permissible voltage (also during scanning period) internally controlled voltage on pin 19 maximum output current maximum input current input resistance for measurement input additional input current threshold of warm up detector (active in line MG) difference between input voltage for cut-off and VREF0; adjustable via I2C-bus (subaddress for reference: R: 07H, G: 08H and B: 09H) maximum VMEAS nominal VMEAS minimum VMEAS I25, 23, 21 I25, 23, 21(max) Gstg input currents of storage inputs outside of the measurement time maximum charge / discharge current during measurement time gain from storage pins 25, 23 and 21 to outputs I2C-bus data 3FH I2C-bus data 20H I2C-bus data 00H V V A A M mA V -
1.45 0.9 0.4 - 0.2 -
1.6 1.0 0.45 - 0.3 1.7
1.75 1.1 0.5
V V V A mA -
Storage of cut-off control voltage / output clamping voltage (pins 25, 23 and 21) 0.1 0.4 -
Storage of leakage information (pin 17) I17 I17 I17 V17 maximum charge / discharge current at time LM discharge current leakage current voltage to reset IC to switch on conditions 300 peak limiting during time - MK active outside time LM V17 is below - 2.3 400 4 - 2.5 - - 0.1 3.0 A mA A V
1997 Feb 06
24
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
SYMBOL PARAMETER CONDITIONS MIN.
TDA4780
TYP.
MAX. UNIT
Signal limiting (the limitation acts on contrast and at low contrast on brightness) AVERAGE BEAM CURRENT LIMITING (PIN 15) V15 V15 V15 V15 I15 start of contrast reduction input range for full contrast reduction start of brightness reduction input range for full brightness reduction input current - - - - - 4 -2 2.5 -1.6 - - - - - -0.5 V V V V A
PEAK SIGNAL LIMITING OF OUTPUT SIGNALS (PIN 16; THE LIMITATION ACTS 1H DELAYED; LIMITING LEVEL ADJUSTABLE BY I2C-BUS (SUBADDRESS 0AH; CONTROL BIT RELC = 0)) V24, 22, 20(max) V24, 22, 20(min) I16(max) maximum limiting level minimum limiting level maximum discharge current at peak drive extrapolated from 2FH I2C-bus data 00H RELC = 0 6.8 - 4 - 2.3 - 7.2 3 6 V V mA
PEAK SIGNAL LIMITING (PIN 16; CONTROL BIT RELC = 1; LIMITING LEVEL (VLIL) ADJUSTABLE BY I2C-BUS (SUBADDRESS 0AH)) VLiL equal gain in white point adjust; signal only in one output channel; peak drive limiting starts, if the maximum of the RGB signals after white point adjustment exceeds a threshold maximum limiting level minimum limiting level I2C-bus data 3FH I2C-bus data 00H 3.2 1.2 3.5 1.5 - 6 4.0 1.8 - 7.5 V V - mA
DISCHARGE CURRENTS (CUT-OFF MEASUREMENT LEVEL MX = MR OR MB OR MG) I16(tot)(dch) total discharge current I16 = I16(1) + I16(2) + I16(3) - TH1 = MX + VLiL; 1 line delayed and low-pass filtered 4.5
Threshold 1 (TH1)
I16(1)(max)(dch) maximum discharge current
S
steepness
- TCPL = 1 (at 1fH); RELC = 1 TCPL = 0 (at 2fH); RELC = 1 0.9 0.4
15
- 1.5 0.8
mA/V s s
Low-pass filter, control bit TCPL
tDPDL tDPDL time constant low-pass filter time constant low-pass filter 1.2 0.6
Threshold 2 (TH2)
I16(2)(max)(dch) S maximum discharge current steepness TH2 = MX + VLiL x 1.10; 4.5 1 line delayed - 6 15 7.5 - mA mA/V
1997 Feb 06
25
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
SYMBOL PARAMETER CONDITIONS MIN.
TDA4780
TYP.
MAX. UNIT
Threshold 3 (TH3)
I16(3)(max)(dch) S CHARGE CURRENT I16 V16 V16 V16 V16 V16(max) Vo26(min) Vo26(nom) Vo26(max) I26 I2C-bus inputs f28 tSU;DAT tH tL tr tf VIL VIH II clock frequency range data set-up time clock pulse HIGH clock pulse LOW rise time fall time 0 250 4 4.7 - - - 3.0 V27 and V28 = 0.4 V V27 and V28 = 0.9VP Output level (pin 27) VOL IO LOW level output voltage output current V27 = 0.4 V - 3.0 - - 0.4 - V mA -10 - - - - - - - - - - - 100 - - - 1 0.3 kHz ns s s s s charge current start of contrast reduction input range for full contrast reduction start of brightness reduction input range for full brightness reduction maximum voltage by internal limitation YEXH = 0; I2C-bus data 00H YEXH = 0; I2C-bus data 20H YEXH = 0; I2C-bus data 3FH -2 - - - - 4.5 -1 4 -2 2.5 -1.6 - - 3.2 - 700 -0.5 - - - - - A V V V V V maximum discharge current steepness TH3 = MX + VLiL; undelayed 0.45 - 0.6 1.5 0.75 - mA mA/V
Hue adjust output (pin 26); note 14 minimum output voltage nominal output voltage maximum output voltage current of internal emitter follower 0.5 3.0 4.8 500 1.0 3.4 5.6 - V V V A
Input levels (pins 27 and 28) LOW level input voltage HIGH level input voltage input current 1.5 5.5 - 10 V V A A
1997 Feb 06
26
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
Notes to the characteristics
TDA4780
1. RGB signals controlled by saturation, adaptive black, contrast and brightness. Gamma affects the Y component of the internal RGB signals. 2. Adaptive black control acts on Y signal, which is either Y input or Y output from RGB matrix. Negative set-up is not affected. The level shift value is determined by the peak dark detector, operation selected by control bit ADBL. The peak dark detector is inactive during blanking. Peak dark detector activated by internal line counter, which starts after the end of the vertical blank of the sandcastle. Active from line 16 (after end of vertical sandcastle) to line 224 (NTSC mode, NMEN = 1) or line 272 (PAL mode, NMEN = 0). It is recommended to increase the contrast value (subaddress 02H) by 15% if ADBL = 1. The line numbers are doubled if control bit HDTV = 1. 3. At minimum gamma (3FH) any differences in black level steps are amplified by 6 dB. 4. For nominal saturation the range of values is: a) 1FH is the minimum value that can be used b) 20H is the typical value that can be used c) 21H is the maximum value that can be used. 5. For nominal contrast the range of values is: a) 20H is the minimum value that can be used b) 22H is the typical value that can be used c) 24H is the maximum value that can be used. 6. V 24 V 22 V 20 V 20 V 24 V 22 V ------------ = ------------------ - ------------------ = ------------------ - ------------------ = ------------------ - ------------------ . For meaning of actual nominal signal see V nom V nom24 V nom22 V nom24 V nom20 V nom22 V nom20 chapter "Characteristics". 7. Series resistor in supply voltage should be less than 0.3 . 8. At 1.0 V cut-off measurement level the function of the cut-off control loop is not guaranteed because the blanking level is limited to the minimum output voltage. For proper working a guide number for the minimum cut-off measurement level is 1.3 V. 9. For nominal AC gain settings the range of values is: a) 21H is the minimum value that can be used b) 22H is the typical value that can be used c) 23H is the maximum value that can be used. V 24 V 22 V 20 V 20 V 24 V 22 V 10. ------------ = ------------------ - ------------------ = ------------------ - ------------------ = ------------------ - ------------------ . For meaning of actual nominal signal see V nom24 V nom22 V nom24 V nom20 V nom22 V nom20 V nom chapter "Characteristics". 11. Sandcastle pulse detector (pin 14) The sandcastle pulse is compared with 3 (control bit SC5 = 0) or 2 (SC5 = 1) internal threshold levels to separate the various pulses; the internal pulses are generated while the input is higher than the thresholds. The thresholds are independent of supply voltage and temperature.
1997 Feb 06
27
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
TDA4780
12. Blanking to ultra black level occurs during time DG except MR in R-channel, MG in G-channel, MB in B-channel (see Fig.10). a) Leakage current measuring time: LM will start after the end of vertical sandcastle (see Fig.10). b) Vertical blanking period and cut-off measurement lines (see Fig.10): The vertical component will be identified if it contains 2 or more burst key pulses in the event of SC5 = 1 or two or more line pulses (H) in the event of SC5 = 0. The line counter is triggered by the leading edge. The blanking time is valid for a vertical pulse detected by the sandcastle decoder. The internal blank pulse is OR gated with the sandcastle vertical pulse and the end of the measurement pulses. c) Insertion time: full line period. d) Measurement time: line period minus horizontal period (50/60 Hz). e) Line sequence of measuring lines (see Fig.10): First line after end of horizontal pulse which followed the end of vertical pulse: leakage measurement LM First line after leakage measurement pulse: red measurement MR Second line after leakage measurement pulse: green measurement MG Third line after leakage measurement pulse: blue measurement MB. 13. Y output can be switched to hue adjust output via I2C-bus control bit YEXH. Output without sync pulse. Recommendation: Hue adjust DAC set to 3FH. Black level adjustable via hue adjust DAC. 14. Output can be switched to Y output via I2C-bus control bit YEXH (via I2C-bus, resolution 6-bit, bus subaddress 03H).
1997 Feb 06
28
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
INTERNAL PIN CONFIGURATIONS Abbreviations: OB: Open Base and CL: Clamp Pulse. PIN 1 PIN NAME (DESCRIPTION) fast switch 2 input
+
TDA4780
WAVE FORM
I or Z
INTERNAL CIRCUIT
0.1 mA
1 4.2 k
+
ESD protection
1
MGE883
2
red input 2
colour bars
100 A/OB
CL 5V black CL
MGE884
2
+
ESD protection
0.5 A
2
MGE885
3
green input 2
colour bars
100 A/OB
CL 5V black CL
MGE886
3
+
ESD protection
0.5 A
3
MGE887
1997 Feb 06
29
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
PIN 4 PIN NAME (DESCRIPTION) blue input 2
colour bars CL 5V black CL
MGE888
TDA4780
WAVE FORM
I or Z 100 A/OB
INTERNAL CIRCUIT
4
+
ESD protection
0.5 A
4
MGE889
5
supply voltage
ESD protection 5
+
VP 5
MGE890
6
colour difference input -(B - Y)
4V
100 A/OB
colour bars CL 6
CL
MGE891
+
ESD protection
0.5 A
6
MGE892
1997 Feb 06
30
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
PIN 7 PIN NAME (DESCRIPTION) colour difference input -(R - Y)
4V CL
TDA4780
WAVE FORM
I or Z 100 A/OB
INTERNAL CIRCUIT
7 colour bars CL
MGE893
+
ESD protection
0.5 A
7
MGE894
8
luminance input
100 A/OB
CL 5V black colour bars 8
CL
MGE895
+
ESD protection
0.5 A
8
MGE896
9
ground
9 GND
MGE897
no ESD protection circuit for ground pin
1997 Feb 06
31
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
PIN 10 PIN NAME (DESCRIPTION) red input 1
colour bars CL
TDA4780
WAVE FORM
I or Z 100 A/OB
INTERNAL CIRCUIT
10 5V black CL
MGE898
+
ESD protection
0.5 A
10
MGE899
11
green input 1
colour bars
100 A/OB
CL 5V black CL
MGE900
11
+
ESD protection
0.5 A
11
MGE901
12
blue input 1
colour bars
100 A/OB
CL 5V black CL
MGE902
12
+
ESD protection
0.5 A
12
MGE903
1997 Feb 06
32
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
PIN 13 PIN NAME (DESCRIPTION) fast switch 1 input
+
TDA4780
WAVE FORM
I or Z
INTERNAL CIRCUIT
0.2 mA
13 3.8 k
+
ESD protection
13
MGE904
14
sandcastle pulse input
3-level sandcastle CL H V 3.5 V 1.5 V
MGE905
37 k (SC5 = 0)
5.5 V
+
50 A
+
120 A 1 k 14 14 k 1 k 23 k
2-level sandcastle CL HV 1.5 V
MGE906
OB (SC5 = 1)
+
SC5=1
3.5 V ESD protection 14
MGE907
15
average beam current limiting input
OB
+
30 A 2 k 15
+
15 ESD protection
MGE908
1997 Feb 06
33
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
PIN 16 PIN NAME (DESCRIPTION) storage capacitor for peak limiting WAVE FORM outside peak drive during peak drive (RELC = 1) during peak drive (RELC = 0) OB 0 to 12 mA 5 mA
+
30 A 2 k
TDA4780
I or Z
INTERNAL CIRCUIT
16 4.2 V 0 to 12 mA peak drive detection
+
ESD protection
16
MGE909
17
storage capacitor for leakage current compensation
outside leakage current measurement during leakage current measurement automatic switch to power on reset
OB
+
-400 A to +400 A 4 mA
2.5 V
12 A
LM 17
4 mA
+
switch to power on reset 17 ESD protection
MGE910
1997 Feb 06
34
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
PIN 18 PIN NAME (DESCRIPTION) storage capacitor for peak dark WAVE FORM I or Z OB/0.26 mA
+
0.26 mA
TDA4780
INTERNAL CIRCUIT
closed switch if peak dark detected 2 k 18 closed switch during active measurement window 2 A
63 A
+
ESD protection
18
MGE911
19
cut-off measurement input
3.7 V 2.7 V LM preclamp
MGE912
-300 A to +300 A
+
60 A
MR
MG
MB
19 preclamp 3.15 V to 4.3 V 0.5 mA warm up finished
+
19 ESD protection
MGE913
1997 Feb 06
35
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
PIN 20 PIN NAME (DESCRIPTION) blue output
BCOF = 0 1st line sawtooth signal
TDA4780
WAVE FORM
I or Z 5 mA
INTERNAL CIRCUIT
cut-off measurement pulse brightness
20 5 mA
+
ultra black
MGE914
ESD protection
5 mA
BCOF = 1 MOD2 = 0
20
MGE917
brightness 2.5 V
MGE915
5 mA
BCOF = 1 MOD2 = 1 2.5 V
MGE916
21
blue cut-off storage capacitor
during cut-off control or during output clamping
OB -300 A to +300 A
5 k 2.5 V
21
+
ESD protection
21
MGE918
1997 Feb 06
36
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
PIN 22 PIN NAME (DESCRIPTION) green output
BCOF = 0 1st line sawtooth signal
TDA4780
WAVE FORM
I or Z 5 mA
INTERNAL CIRCUIT
cut-off measurement pulse brightness
22 5 mA
+
ultra black
MGE919
ESD protection
5 mA
BCOF = 1 MOD2 = 0
22
MGE922
brightness 2.5 V
MGE920
5 mA
BCOF = 1 MOD2 = 1 2.5 V
MGE921
23
green cut-off storage capacitor
during cut-off control or during output clamping
OB -300 A to +300 A
5 k 2.5 V
23
+
ESD protection
23
MGE923
1997 Feb 06
37
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
PIN 24 PIN NAME (DESCRIPTION) red output
BCOF = 0 1st line sawtooth signal
TDA4780
WAVE FORM
I or Z 5 mA
INTERNAL CIRCUIT
cut-off measurement pulse brightness
24 5 mA
ultra black
MGE924
+
5 mA
BCOF = 1 MOD2 = 0
ESD protection
24
MGE927
brightness 2.5 V
MGE925
5 mA
BCOF = 1 MOD2 = 1 2.5 V
MGE926
25
red cut-off storage capacitor
during cut-off control or during output clamping
OB -300 A to +300 A
5 k 2.5 V
25
+
ESD protection
25
MGE928
1997 Feb 06
38
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
PIN 26 PIN NAME (DESCRIPTION) Y output/hue adjust output
YEXH = 1
TDA4780
WAVE FORM
I or Z 0.7 mA
INTERNAL CIRCUIT
26 0.7 mA colour bars
MGE929
YEXH = 0; DC 0.8 V to 5.0 V
0.7 mA
+
ESD protection
26
MGE930
27
I2C-bus serial data input/acknowledge output
outside acknowledge during acknowledge
OB less than 0.1 V up to 4 mA due to external pull-up resistor
+
10 A 2 k 27
acknowledge
27 ESD protection
MGE931
28
I2C-bus serial clock input
OB
+
10 A 2 k 28
28 ESD protection
MGE932
1997 Feb 06
39
SCL SDA YHUE SCL SDA 1 200 V +12 V 2 220 nF 3 4 GND 220 nF 5 6 220 nF 7 8 9 10 82 k CON2 YHUE CR RO CG GO CB BO CI CPDST CL CPDL BCL 1 F 330 nF 1 F R18 (2) 1 M BZX79 C6V2 100 100
dbook, full pagewidth
1997 Feb 06
FSW2 1 28 27 26 25 24 23 22 RO GO BO CI 2 3 4 5 6 7 10 nF R2 G2 B2 VP -(B - Y) -(R - Y) Y 8 21 20 19 18 17 16 15 9 10 11 12 13 14 GND 10 nF R1 G1 B1 FSW1 SC 75 1N4148 10 nF 10 nF 10 nF 10 nF 75 10 nF 10 nF 10 nF 47 nF
FSW2
R2
Philips Semiconductors
G2
B2
75
75
75
-(B - Y)
TEST AND APPLICATION INFORMATION
-(R - Y)
TDA4780
Y
RGB video processor with automatic cut-off control and gamma adjust
R1
40
3.9 k 1N4148 22 F 10 k 3.9 k BR1(1)
MGE882
G1
B1
FSW1
SC
75
75
75
VP = 8 V
22 H
220 F
beam current information
(1) Insert link BR1 if average beam current is not applied. (2) R18 may be omitted.
Preliminary specification
TDA4780
Fig.12 Test and application circuit.
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
PACKAGE OUTLINE
handbook, plastic dual in-line package; 28 leads (600 mil) DIP28: full pagewidth
TDA4780
SOT117-1
seating plane
D
ME
A2
A
L
A1 c Z e b1 b 28 15 MH wM (e 1)
pin 1 index E
1
14
0
5 scale
10 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 5.1 0.20 A1 min. 0.51 0.020 A2 max. 4.0 0.16 b 1.7 1.3 0.066 0.051 b1 0.53 0.38 0.020 0.014 c 0.32 0.23 0.013 0.009 D (1) 36.0 35.0 1.41 1.34 E (1) 14.1 13.7 0.56 0.54 e 2.54 0.10 e1 15.24 0.60 L 3.9 3.4 0.15 0.13 ME 15.80 15.24 0.62 0.60 MH 17.15 15.90 0.68 0.63 w 0.25 0.01 Z (1) max. 1.7 0.067
Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT117-1 REFERENCES IEC 051G05 JEDEC MO-015AH EIAJ EUROPEAN PROJECTION
ISSUE DATE 92-11-17 95-01-14
1997 Feb 06
41
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
SOLDERING Introduction There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our "IC Package Databook" (order code 9398 652 90011). Soldering by dipping or by wave The maximum permissible temperature of the solder is 260 C; solder at this temperature must not be in contact with the joint for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds.
TDA4780
The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg max). If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. Repairing soldered joints Apply a low voltage soldering iron (less than 24 V) to the lead(s) of the package, below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300 C it may remain in contact for up to 10 seconds. If the bit temperature is between 300 and 400 C, contact may be up to 5 seconds.
1997 Feb 06
42
Philips Semiconductors
Preliminary specification
RGB video processor with automatic cut-off control and gamma adjust
DEFINITIONS Data sheet status Objective specification Preliminary specification Product specification Limiting values
TDA4780
This data sheet contains target or goal specifications for product development. This data sheet contains preliminary data; supplementary data may be published later. This data sheet contains final product specifications.
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. PURCHASE OF PHILIPS I2C COMPONENTS
Purchase of Philips I2C components conveys a license under the Philips' I2C patent to use the components in the I2C system provided the system conforms to the I2C specification defined by Philips. This specification can be ordered using the code 9398 393 40011.
1997 Feb 06
43
Philips Semiconductors - a worldwide company
Argentina: see South America Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. +61 2 9805 4455, Fax. +61 2 9805 4466 Austria: Computerstr. 6, A-1101 WIEN, P.O. Box 213, Tel. +43 1 60 101, Fax. +43 1 60 101 1210 Belarus: Hotel Minsk Business Center, Bld. 3, r. 1211, Volodarski Str. 6, 220050 MINSK, Tel. +375 172 200 733, Fax. +375 172 200 773 Belgium: see The Netherlands Brazil: see South America Bulgaria: Philips Bulgaria Ltd., Energoproject, 15th floor, 51 James Bourchier Blvd., 1407 SOFIA, Tel. +359 2 689 211, Fax. +359 2 689 102 Canada: PHILIPS SEMICONDUCTORS/COMPONENTS, Tel. +1 800 234 7381 China/Hong Kong: 501 Hong Kong Industrial Technology Centre, 72 Tat Chee Avenue, Kowloon Tong, HONG KONG, Tel. +852 2319 7888, Fax. +852 2319 7700 Colombia: see South America Czech Republic: see Austria Denmark: Prags Boulevard 80, PB 1919, DK-2300 COPENHAGEN S, Tel. +45 32 88 2636, Fax. +45 31 57 1949 Finland: Sinikalliontie 3, FIN-02630 ESPOO, Tel. +358 9 615800, Fax. +358 9 61580/xxx France: 4 Rue du Port-aux-Vins, BP317, 92156 SURESNES Cedex, Tel. +33 1 40 99 6161, Fax. +33 1 40 99 6427 Germany: Hammerbrookstrae 69, D-20097 HAMBURG, Tel. +49 40 23 53 60, Fax. +49 40 23 536 300 Greece: No. 15, 25th March Street, GR 17778 TAVROS/ATHENS, Tel. +30 1 4894 339/239, Fax. +30 1 4814 240 Hungary: see Austria India: Philips INDIA Ltd, Shivsagar Estate, A Block, Dr. Annie Besant Rd. Worli, MUMBAI 400 018, Tel. +91 22 4938 541, Fax. +91 22 4938 722 Indonesia: see Singapore Ireland: Newstead, Clonskeagh, DUBLIN 14, Tel. +353 1 7640 000, Fax. +353 1 7640 200 Israel: RAPAC Electronics, 7 Kehilat Saloniki St, TEL AVIV 61180, Tel. +972 3 645 0444, Fax. +972 3 649 1007 Italy: PHILIPS SEMICONDUCTORS, Piazza IV Novembre 3, 20124 MILANO, Tel. +39 2 6752 2531, Fax. +39 2 6752 2557 Japan: Philips Bldg 13-37, Kohnan 2-chome, Minato-ku, TOKYO 108, Tel. +81 3 3740 5130, Fax. +81 3 3740 5077 Korea: Philips House, 260-199 Itaewon-dong, Yongsan-ku, SEOUL, Tel. +82 2 709 1412, Fax. +82 2 709 1415 Malaysia: No. 76 Jalan Universiti, 46200 PETALING JAYA, SELANGOR, Tel. +60 3 750 5214, Fax. +60 3 757 4880 Mexico: 5900 Gateway East, Suite 200, EL PASO, TEXAS 79905, Tel. +9-5 800 234 7381 Middle East: see Italy Netherlands: Postbus 90050, 5600 PB EINDHOVEN, Bldg. VB, Tel. +31 40 27 82785, Fax. +31 40 27 88399 New Zealand: 2 Wagener Place, C.P.O. Box 1041, AUCKLAND, Tel. +64 9 849 4160, Fax. +64 9 849 7811 Norway: Box 1, Manglerud 0612, OSLO, Tel. +47 22 74 8000, Fax. +47 22 74 8341 Philippines: Philips Semiconductors Philippines Inc., 106 Valero St. Salcedo Village, P.O. Box 2108 MCC, MAKATI, Metro MANILA, Tel. +63 2 816 6380, Fax. +63 2 817 3474 Poland: Ul. Lukiska 10, PL 04-123 WARSZAWA, Tel. +48 22 612 2831, Fax. +48 22 612 2327 Portugal: see Spain Romania: see Italy Russia: Philips Russia, Ul. Usatcheva 35A, 119048 MOSCOW, Tel. +7 095 755 6918, Fax. +7 095 755 6919 Singapore: Lorong 1, Toa Payoh, SINGAPORE 1231, Tel. +65 350 2538, Fax. +65 251 6500 Slovakia: see Austria Slovenia: see Italy South Africa: S.A. PHILIPS Pty Ltd., 195-215 Main Road Martindale, 2092 JOHANNESBURG, P.O. Box 7430 Johannesburg 2000, Tel. +27 11 470 5911, Fax. +27 11 470 5494 South America: Rua do Rocio 220, 5th floor, Suite 51, 04552-903 Sao Paulo, SAO PAULO - SP, Brazil, Tel. +55 11 821 2333, Fax. +55 11 829 1849 Spain: Balmes 22, 08007 BARCELONA, Tel. +34 3 301 6312, Fax. +34 3 301 4107 Sweden: Kottbygatan 7, Akalla, S-16485 STOCKHOLM, Tel. +46 8 632 2000, Fax. +46 8 632 2745 Switzerland: Allmendstrasse 140, CH-8027 ZURICH, Tel. +41 1 488 2686, Fax. +41 1 481 7730 Taiwan: Philips Semiconductors, 6F, No. 96, Chien Kuo N. Rd., Sec. 1, TAIPEI, Taiwan Tel. +886 2 2134 2870, Fax. +886 2 2134 2874 Thailand: PHILIPS ELECTRONICS (THAILAND) Ltd., 209/2 Sanpavuth-Bangna Road Prakanong, BANGKOK 10260, Tel. +66 2 745 4090, Fax. +66 2 398 0793 Turkey: Talatpasa Cad. No. 5, 80640 GULTEPE/ISTANBUL, Tel. +90 212 279 2770, Fax. +90 212 282 6707 Ukraine: PHILIPS UKRAINE, 4 Patrice Lumumba str., Building B, Floor 7, 252042 KIEV, Tel. +380 44 264 2776, Fax. +380 44 268 0461 United Kingdom: Philips Semiconductors Ltd., 276 Bath Road, Hayes, MIDDLESEX UB3 5BX, Tel. +44 181 730 5000, Fax. +44 181 754 8421 United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409, Tel. +1 800 234 7381 Uruguay: see South America Vietnam: see Singapore Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD, Tel. +381 11 625 344, Fax.+381 11 635 777
For all other countries apply to: Philips Semiconductors, Marketing & Sales Communications, Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825 (c) Philips Electronics N.V. 1997
Internet: http://www.semiconductors.philips.com
SCA53
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights.
Printed in The Netherlands
547047/1200/02/pp44
Date of release: 1997 Feb 06
Document order number:
9397 750 01716

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