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SM5301BS
3-channel Video Buffer with Built-in Wideband Filters with Filter Through Function
OVERVIEW
The SM5301BS is a video filter LSI with buffered outputs for VESA-standard ATSC digital TV. The filter employs a 5-order Butterworth lowpass filter configuration. The filter characteristics have been optimized for minimal overshoot and flat group delay, it has a variable cutoff frequency and guaranteed output buffer-stage channel gain difference and phase difference values. It has also filter through mode.
FEATURES
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PINOUT
(Top view)
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Supply voltage: 5V 10% VESA-standard ATSC digital TV RGB/YUV video filters RGB/YUV switching multiplexer function Synctip clamp input 0dB, 6dB gain switching function (input-to-output AC signal gain) Channel-to-channel gain difference: 0.5dB ( 5% supply voltage variation) Channel-to-channel phase difference: 3.5 degree Output signal harmonic distortion (all channels): 1.5% Cutoff frequency: 5 to 37MHz variable Filter through mode (passband frequency is 46MHz, when gain is 6dB) Package: 28-pin HSOP (Pb free)
GINA/UINA GSG1 GINB/UINB NC BINA/VINA GSB1 BINB/VINB GND
1 2 3 4 5 6 7
28 27 26 25 24 23 22
NC RINB/YINB GSR1 RINA/YINA VCC4 THROUGH MUXSEL GND
NC DISABLE GND3 BOUT/VOUT VCC3 GND2 GOUT/UOUT
8 9 10 11 12 13 14
21 20 19 18 17 16 15
VFC RFC GND4 VCC1 ROUT/YOUT GND1 VCC2
APPLICATIONS
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Set-top boxes Digital television DVD players
ORDERING INFORMATION
Device SM5301BS Package 28-pin HSOP
PACKAGE DIMENSIONS
(Unit: mm)
+ 0.1 0.15 - 0.0 5
7.5 0.2
9.9 0.3
18.6 0.3
2.2 0.1
1.3TYP
0 to 10
0.8
5.15
0.10 0.35 0.05 0.12 M
SEIKO NPC CORPORATION --1
0.1 0.05
0.5 0.2
SM5301BS
BLOCK DIAGRAM
VCC1
VCC2
VCC3
VCC4
DISABLE Buffer RINA/YINA MUX RINB/YINB LPF ROUT/YOUT GSR1
Buffer GINA/UINA MUX GINB/UINB LPF GOUT/UOUT GSG1
Buffer BINA/VINA MUX BINB/VINB MUXSEL LPF BOUT/VOUT GSB1
RFC
IFC Control
THROUGH
VFC
GND1
GND2
GND3
GND4
Note. Power supply pin distinction VCC1, GND1: R/Y block VCC2, GND2: G/U block VCC3, GND3: B/V block VCC4, GND4: IFCCONT block, and logic input control block
SEIKO NPC CORPORATION --2
SM5301BS
PIN DESCRIPTION
Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Name GINA/UINA GSG1 GINB/UINB NC BINA/VINA GSB1 BINB/VINB NC DISABLE GND3 BOUT/VOUT VCC3 GND2 GOUT/UOUT VCC2 GND1 ROUT/YOUT VCC1 GND4 RFC VFC MUXSEL I/O1 I Ipu I - I Ipu I - Ipd - O - - O - - O - - - I Ipd Analog GINA or UINA signal input GOUT/UOUT output buffer gain set input Analog GINB or UINB signal input No connection (leave open or connect to ground) Analog BINA or VINA signal input BOUT/VOUT output buffer gain set input Analog BINB or VINB signal input No connection (leave open or connect to ground) Power save function L: Enable H: Disable (Output pins: ROUT/YOUT, GOUT/UOUT, and BOUT/VOUT are high impedance.) Analog ground B/V signal output Analog 5V supply Analog ground G/U signal output Analog 5V supply Analog ground R/Y signal output Analog 5V supply Analog ground LPF (lowpass filter) cutoff frequency setting resistor connection LPF (lowpass filter) cutoff frequency setting voltage input Input select signal L: xINA pin select H: xINB pin select Filter mode select pin L: Filter mode H: Filter through mode Analog 5V supply Analog RINA or YINA signal input ROUT/YOUT output buffer gain set input Analog RINB or YINB signal input No connection (leave open or connect to ground) Description
23 24 25 26 27 28
THROUGH VCC4 RINA/YINA GSR1 RINB/YINB NC
Ipd - I Ipu I -
1. I: input pin, Ipd: input pin with pull-down resistor, Ipu: input pin with pull-up resistor, o: output pin
SEIKO NPC CORPORATION --3
SM5301BS
SPECIFICATIONS
Absolute Maximum Ratings
Parameter Supply voltage range Supply voltage deviation1 Storage temperature range Power dissipation 12 Power dissipation 23 Junction temperature Symbol VCC VCC Tstg PD1 PD2 Tj Rating - 0.3 to 7.0 0.1 - 55 to + 125 1.0 0.9 125 Unit V V C W W C
1. Supply voltage deviation of each power supply pin. Supply the power to VCC1 to VCC4 pin, simultaneously. 2. When mounted on a substrate: mounted on a 111 x 80 x 1.6mm glass-epoxy substrate with 90% copper (Cu) wiring factor, 0m/s air flow, jc = 52C/W, and Ta = - 25 to 70 C. 3. When mounted on a substrate: mounted on a 111 x 80 x 1.6mm glass-epoxy substrate with 90% copper (Cu) wiring factor, 0m/s air flow, jc = 52C/W, and Ta = 70 to 80 C.
Recommended Operating Conditions
Parameter Supply voltage range Operating ambient temperature Symbol VCC Ta Rating 4.5 to 5.5 - 25 to 85 Unit V C
SEIKO NPC CORPORATION --4
SM5301BS
Electrical Characteristics
Input and Output Characteristics VCC = 4.5 to 5.5V, Ta = - 25 to 85C unless otherwise noted. Refer to "Measurement Circuit".
Rating Parameter Symbol Condition min Supply current 1 Supply current 2 Supply current 3 Output gain error 1 Output gain error 2 Maximum output voltage DISABLE-mode input impedance (pull-down) Clamp response time Maximum input amplitude Maximum overshoot Maximum load capacitance Output drive load Channel-to-channel gain difference Channel-to-channel phase difference Output harmonic distortion Power supply rejection ratio Output short-circuit current Logic HIGH-level input voltage 1 Logic LOW-level input voltage 1 Logic HIGH-level input voltage 2 Logic LOW-level input voltage 2 Logic pull-up resistance Logic pull-down resistance ICC1 ICC2 ICC3 AV1 AV2 Vout RIN1 Tclamp VI VOS CL RL dG VCC = 5.5V, RFC = 820 to GND, VFC = 0.2V, DISABLE = "L" VCC = 5.5V, RFC = 820 to GND, VFC = 1.6V, DISABLE = "L" VCC = 5.5V, RFC = 820 to GND, VFC = 0.2V, DISABLE = "H" Gain = 0dB/6dB, VCC = 4.75 to 5.25V, Ta = 0 to 70C Gain = 0dB/6dB, Ta = - 25 to 85C RL = 75 to GND, Gain = 6dB RINA/YINA, RINB/YINB, GINA/UINA, GINB/UINB, BINA/VINA, BINB/VINB Time for 90% output signal change for 10mV input signal, CIN = 0.1F AC coupling input, Gain = 6dB 2Vp-p pulse output BOUT/VOUT, GOUT/UOUT, ROUT/YOUT one load unit = 150 Between R/G/B, fc/2 [Hz] Between R/G/B, fc/2 [Hz] Vout = 2Vp-p, f = 1MHz VCC = 0.5Vp-p, f = 100kHz 70 90 1 - - 2.4 40 - - - - - - - - - - DISABLE, MUXSEL, THROUGH DISABLE, MUXSEL, THROUGH GSB1, GSG1, GSR1 GSB1, GSG1, GSR1 GSB1, GSG1, GSR1 DISABLE, MUXSEL, THROUGH 2.5 - VCC - 0.5 - 32 40 typ 100 120 2.5 - - - 50 8 - 10 - - - 3.5 1.5 35 - - - - - 40 50 max 130 160 5 0.5 1 - 60 - 1.4 - 15 2 0.5 - - - 100 - 1.0 - 0.5 48 60 mA mA mA dB dB Vp-p k ms Vp-p % pF load dB degree % dB mA V V V V k k Unit Test level I I I I I I I II I II II I I II II II II I I I I I I
d
THD PSRR ISC VIH1 VIL1 VIH2 VIL2 RIN2 RIN3
SEIKO NPC CORPORATION --5
SM5301BS Filter Mode Characteristics VCC = 4.5 to 5.5V, Ta = - 25 to 85C, THROUGH = Low, VI = 0.7Vp-p unless otherwise noted. Refer to "Measurement Circuit".
Rating Parameter Cutoff frequency adjustment range Cutoff frequency error 4fc attenuation Crosstalk Multiplexer crosstalk Channel-to-channel group delay Symbol Condition min FC FC fSB XTALK XTALK TPD TPD1 Ta=25C (see Figure 1-1) Ta = 25C, VCC = 5.0V fIN 4fc Between 2 channels with input 0.5Vp-p 1MHz Between MUX A-B with input 0.5Vp-p 1MHz Each input = 500kHz Fc = 6.7MHz (500kHz) to 3.58MHz to 4.43MHz to 3.58MHz Group delay variation TPD2 Fc = 24MHz (500kHz) to 4.43MHz to 10MHz TPD3 VFC input voltage range VFC Fc = 36MHz (1MHz) to 10MHz to 30MHz 5.8 - - - - - - - - - - - - 0.2 typ - - 50 - 47 - 49 10 9 15 1 1 2 0.5 5 - max 37 20 - - - - - - - - - - - 1.6 MHz % dB dB dB ns ns ns ns ns ns ns ns V Unit Test level I I II II II II II II II II II II II I
Filter mode, through mode
Through Mode Characteristics VCC = 5.0V, Ta = - 25 to 85C, THROUGH = High, VI = 0.7Vp-p unless otherwise noted. Refer to "Measurement Circuit".
Rating Parameter Symbol Condition min Cutoff frequency (6dB) Cutoff frequency (0dB) Crosstalk Multiplexer crosstalk FC FC XTALK XTALK Ta=25C, Gain = 6dB, VFC = 1.6V, RFC=820 Ta=25C, Gain = 0dB, VFC = 1.6V, RFC=820 Between 2 channels with input 0.5Vp-p 1MHz Between MUX A-B with input 0.5Vp-p 1MHz 42 39 - - typ 46 43 - 60 - 60 max - - - - MHz MHz dB dB Unit Test level I I II II
Test level I : 100% of products tested at Ta = + 25C. II : Guaranteed as result of design and characteristics evaluation.
SEIKO NPC CORPORATION --6
SM5301BS Measurement Circuit
VFC(DC)
+
+
47F 0.1F
0.1F
47F 0.1F
TP
220F
+
Analog Input
0.1F RFC
1000pF
75 75
THROUGH
MUXSEL
GSR1
VCC4
VCC1
RINB/YINB
RINA/YINA
GND4
ROUT/YOUT
GND1
VCC2
VFC
NC
RFC
+
GOUT/UOUT
47F
0.1F
BOUT/VOUT
GINA/UINA
GINB/UINB
BINA/VINA
BINB/VINB
DISABLE
GSG1
GND3
GND2
GSB1
VCC3
NC
NC
TP
0.1F 220F
+
Analog Input
0.1F 1000pF
+
75 75
0.1F
47F
0.1F
Analog Input
0.1F
TP
220F
+
1000pF
75 75
SEIKO NPC CORPORATION --7
SM5301BS
FUNCTION DESCRIPTION
Output Buffer Gain Control
GSx1 pin sets the output buffer gain.
GSR1, GSG1, GSB1 Low High or Open Gain [dB] 0 6
Cutoff Frequency Control (RFC and VFC)
Cutoff frequency (fc) can be controlled by control current Ifc (= VFC/RFC) shown as Figure 1-1. And relation of fc vs VFC at RFC = 680, 820, 1k is shown as Figure 1-2.
40 35 30
fc [MHz]
25 20 15 10 5 0 0 0.5 1 Ifc [mA] 1.5 2 2.5
Figure 1-1. fc vs. Ifc
40 35 30
RFC = 1k RFC = 680 RFC = 820
fc [MHz]
25 20 15 10 5 0 0 0.5 1 VFC [V] 1.5 2
Figure 1-2. fc vs. VFC
SEIKO NPC CORPORATION --8
SM5301BS
20 Gain = 6dB 0 Gain = 0dB Gain [dB] - 20 - 40 - 60 - 80
0.1
1
10 Frequency [MHz]
100
Figure 2-1. Filter characteristic (RFC = 820, VFC = 0.2V)
20 Gain = 6dB 0 Gain [dB] Gain = 0dB - 20
- 40
- 60 0.1
1 Frequency [MHz]
10
100
Figure 2-2. Filter characteristic (RFC = 820, VFC = 1.0V)
20 Gain=6dB 0 Gain=0dB
Gain [dB]
- 20
- 40
- 60 0.1
1 Frequency [MHz]
10
100
Figure 2-3. Filter characteristic (RFC = 820, VFC = 1.6V)
SEIKO NPC CORPORATION --9
SM5301BS
Filter Through Mode
THROUGH pin sets the through mode. It functions only output buffer, and bypasses the LPF.
THROUGH Low or Open High Filter mode/Through mode Filter mode Through mode
Frequency characteristics of through mode is shown as Figure 3 (VFC = 1.6V, RFC = 820).
20 Gain = 6dB 0 Gain = 0dB
Gain [dB]
- 20
- 40
- 60 0.1
1 Frequency [MHz]
10
100
Figure 3. Through mode frequency characteristic
Analog Signal Input
Input Channel Selection MUXSEL pin sets the analog input channel xINA or xINB.
MUXSEL Low or Open High Analog input channel xINA xINB
Selected pins are connected to the internal synctip clamp circuit. Clamp voltage is 2.3V (typ). BIAS Input When input signal is color difference signal of component signal, BIAS input is suitable better than CLAMP input. Connect the resistors as Figure 4, it functions BIAS input.
VCC
220k
XINA/B
330k
GND1
Figure 4. Resistor connection for BIAS input
SEIKO NPC CORPORATION --10
SM5301BS
Adjusting the Cutoff Frequency
Constant-voltage control 1 Cutoff frequency control using a reference voltage VR generated by voltage divider formed by R1 and R2.
VR R1 VFC
R2
RFC
Constant-voltage control 2 Cutoff frequency control by adjusting the resistance connected to RFC.
VFC VR
RFC
PWM control Cutoff frequency control by smoothing the PWM signal, using R1 and C1, input to VFC.
PWM
R1
VFC C1
RFC
When VFC = 0.2V VDD = 3.3V, 6% duty drive VDD = 5.0V, 4% duty drive When VFC = 1.6V VDD = 3.3V, 48% duty drive VDD = 5.0V, 32% duty drive Note: The resistor connected to RFC can affect the cutoff frequency response, so a high-precision component should be used. It is recommended to set the RC filter cutoff frequency to < 1/100fc of the PWM waveform frequency.
SEIKO NPC CORPORATION --11
SM5301BS Resistor switch control The VFC voltage can be controlled using multi-logic voltage levels switching inputs to a voltage divider resistor network.
V1 V2 V3
R1 R2 R3
VFC
RFC R0
The VFC voltage is determined by the logic voltage (V1, V2, V3) and the corresponding voltage divider resistor network.
SEIKO NPC CORPORATION --12
SM5301BS
TYPICAL APPLICATION CIRCUITS
ATSC Digital TV Application
820
Cut-off control voltage Filter through switch RIN/YIN GSR1
+5V
+
(*3)
+
R/Y
75
1.0F
(*4) (*1)
(*2)
(*2)
220F
RINB/YINB
THROUGH
RINA/YINA
MUXSEL
GSR1
VCC4
VCC1
GND4
(*6)
ROUT/YOUT
GND1 GND2
BOUT/VOUT
(*6)
GIN/UIN GSG1
GOUT/UOUT
GINA/UINA
GINB/UINB
BINA/VINA
BINB/VINB
DISABLE
GSG1
GND3
GSB1
NC
NC
VCC3
VCC2
VFC
RFC
NC
1.0F
(*4)
(*1)
(*1) (*2) (*2)
+
G/U
75
220F
+
B/V
75
BIN/VIN GSB1 DISABLE
220F 1.0F
(*4)
(*1) Pins without an input signal, set by NUXSEL, should be left open or tied to GND. (*2) Connect 4 x 0.1F capacitor between the supply pins close to the IC. (*3) Connect a 47F capacitor between the supply pins close to the IC. (*4) Connect a capacitor if an error occurs due to external noise for GSR1, GSG1, GSB1 pins. Also, if opencircuit, the internal impedance and external capacitance (C) form an RC network. When power is applied, the open-circuit potential rises with time constant = C x 10k (sec). (*5) Printed circuit board supply wiring
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I I
If the supply is used for other digital circuits, there is a possibility that noise will be introduced. Accordingly, these circuits should be connected to the application's analog supply. Ground-plane wiring should be performed, as much as possible, to provide low GND line impedance. If ground-plane wiring up to the GND pins is difficult, the ground plane should be as close to the IC as possible with a separate wire to each GND pin.
(*6) The tab (radiation fin) between 7 pin and 8 pin and between 21 pin and 22 pin should be connected to the large ground plane as much as possible for radiation.
Input Capacitor and High Pass Filter Cutoff Frequency
The capacitor connected to pins RINA/YINA, RINB/YINB, GINA/UINB, GINB/UINB, BINA/VINA, and BINB/VINB forms a highpass filter (HPF) with the internal impedance. The HPF cutoff frequency is given by the following equation. fc = 1 2CR (C: input capacitance, R: signal input impedance = 9.3k (typ))
SEIKO NPC CORPORATION --13
SM5301BS
2-load Output Connection
ROUT/YOUT output 2-load connection (similarly for GOUT/UOUT , BOUT/VOUT outputs)
220F
75
ROUT/YOUT
+
R/Y1
75
R/Y2
Digital TV Receiver and HDTV Decoder Box
Graphic Processor
MPEG2 Transport/Decoder
HDTV Decoder/Display Processor
D to A Converter
SM5301B
DIGITAL TV
CAMERA
Video Decoder and Display Processor
D to A Converter
SM5301B
RGB MONITOR
DVD-ROM MEMORY
Graphic Processor
Plasma Display Panel
HD Analog Video
RGB or Y/Cr/Cb Color Signal
SM5301B
A/D Converter
DSP
Gate Alley Frame Memory
From PC Video
VGA Adress Driver LSI Y/C Composite Scan Driver LSI X-sustein Pulse Generator
NTSC Analog Video Y/C Separate
SM5301B
PDP Panel
Synchronous Circuit Vsync Hsync
Adress Driver LSI
Power Supply
AC/DC
DC/DC CPU Clocks
SEIKO NPC CORPORATION --14
Scan Driver LSI Y-sustein Pulse Generator
SM5301BS
Please pay your attention to the following points at time of using the products shown in this document. The products shown in this document (hereinafter "Products") are not intended to be used for the apparatus that exerts harmful influence on human lives due to the defects, failure or malfunction of the Products. Customers are requested to obtain prior written agreement for such use from SEIKO NPC CORPORATION (hereinafter "NPC"). Customers shall be solely responsible for, and indemnify and hold NPC free and harmless from, any and all claims, damages, losses, expenses or lawsuits, due to such use without such agreement. NPC reserves the right to change the specifications of the Products in order to improve the characteristic or reliability thereof. NPC makes no claim or warranty that the contents described in this document dose not infringe any intellectual property right or other similar right owned by third parties. Therefore, NPC shall not be responsible for such problems, even if the use is in accordance with the descriptions provided in this document. Any descriptions including applications, circuits, and the parameters of the Products in this document are for reference to use the Products, and shall not be guaranteed free from defect, inapplicability to the design for the mass-production products without further testing or modification. Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested appropriately take steps to obtain required permissions or approvals from appropriate government agencies.
SEIKO NPC CORPORATION
15-6, Nihombashi-kabutocho, Chuo-ku, Tokyo 103-0026, Japan Telephone: +81-3-6667-6601 Facsimile: +81-3-6667-6611 http://www.npc.co.jp/ Email: sales@npc.co.jp
NC0208BE 2006.04
SEIKO NPC CORPORATION --15

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