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| Satellite-Video IC TDA 6151-5 TDA 6151-5X Preliminary Data Bipolar IC Features q Adjustable gain for different FM deviations q Video buffer and special baseband output for the sound processor SDA 6102-5X are available q Clamping circuit for elimination of "Energy Dispersal" signal q Built-in video switch for external applied video signal q Application in satellite receiving systems. P-DIP-20-1 P-DSO-20-1 Type TDA 6151-5 TDA 6151-5X Ordering Code Q67000-A5175 Q67000-A5074 Package P-DIP-20-1 P-DSO-20-1 (SMD) The video circuit for a satellite application consists of a voltage controlled AGC-amplifier, driver for two external de-emphasis networks, followed by a three-stage switch. An additional baseband output is available via a driver. The output signal of the video switch is applied to a video clamping circuit, this clamping circuit removes the energy dispersal signal from the video signal. The clamped signal is applied via a video switch to the SCART-output. Circuit Description The demodulated FM-satellite video signal is fed via a buffer amplifier to a gain controlled amplifier. The gain control is done using an external applied DC-voltage. The output signal of this amplifier is used to drive three separate signal pathes. First of all the baseband is fed via a high pass filter with a cut off frequency of approx. 4 MHz to the input of a SAT-TV-sound processor, e.g. TDA 6160 X. A second output with a buffer amplifier is used to drive two external de-emphasis networks. After passing through the de-emphasis networks the baseband signals are fed into two inputs of the deSemiconductor Group 1 04.95 TDA 6151-5 TDA 6151-5X emphasis selector switch. The third output of the gain controlled amplifier has a direct connection to the de-emphasis selector switch. This allows the selection of the sufficient frequency response of the de-emphasis network or a linear frequency response by passing the de-emphasis networks. The output signal of the de-emphasis selector switch is fed separately via two driver amplifiers to the baseband 1 output and to the baseband 2 output. This baseband 2 output is fed via an external low pass filter to the input of the energy dispersal clamping circuit. This circuit removes the energy dispersal signal from the baseband signal. The clamping circuit can be operated with an internally generated clamping signal or a clamp pulse applied to the IC from an external source. The internal generated clamping pulse can only be used if the incoming baseband signal is a standard CVBS-signal. The clamping pulse is then located in the H-sync pulse period. The impulse width is approx. 2 s. The external clamping pulse must be active low. The timing of the pulse is not critical. The clamping level used in conjunction with the video signal can be selected according to the operation mode (CVBS- or MAC-mode). The clamping level differs by 1 V. The baseband output (pin 16) and CVBS-output (pin 14) require 75 line drivers implemented as internal drivers followed by a PNP-emitter follower. Pin Configuration (top view) P-DIP-20 P-DSO-20 Semiconductor Group 2 TDA 6151-5 TDA 6151-5X Pin Definitions and Functions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Symbol CVBS PATH PATH 2 GND PATH 1 H-SEP BASEB 2 LEVSEL BASE IN EXSEL EXTKEY VIDEO IN AVSEL VIDEO OUT VS BASE B1 GND SOUND GAIN CVBS IN Function CVBS-output (controlled) De-emphasis select De-emphasis 2 input Ground De-emphasis 1 input Sync separator Baseband output 2 Clamping level select Baseband input Int./ext. clamping select Ext. key pulse input Ext. video input AV select Video output Supply voltage Baseband output 1 Ground Sound output GAIN adjust CVBS-input Semiconductor Group 3 TDA 6151-5 TDA 6151-5X Block Diagram Semiconductor Group 4 TDA 6151-5 TDA 6151-5X Pin Functions CVBS (Pin 1) SOUND (Pin 18) GAIN (Pin 19) Semiconductor Group 5 CVBS IN (Pin 20) TDA 6151-5 TDA 6151-5X VIDEO IN (Pin 12) VIDEO OUT, BASEB1 (Pin 14, 16) AVSEL (Pin 13) Semiconductor Group 6 EXTKEY (Pin 11) TDA 6151-5 TDA 6151-5X BASE IN (Pin 9) H-SEP (Pin 6) Semiconductor Group 7 BASEB2 (Pin 7) TDA 6151-5 TDA 6151-5X PATH1/PATH2 (Pin 5, 3) LEVSEL (pin 8), EXSEL (Pin 10) Semiconductor Group 8 PATH (Pin 2) TDA 6151-5 TDA 6151-5X Absolute Maximum Ratings TA = 0 to 70 C All voltage are referred to ground, unless stated otherwise. All currents are designated by the source and sink principle, i.e. if the device pin has to be regarded as a sink (the current flows in the started pin to the internal ground), it has a negative prefix; if the device pin is the source on the other hand (the current flows from VS across the stated pin), it has a positive prefix. Parameter Supply voltage Buffer output current (de-emphasis) Voltage on sound IF output Video buffer output currents Setting voltages for gain adjust Switching voltages for video switch Junction temperature Storage temperature Thermal resistance system air Operating Range Supply voltage Input frequency range 3 -dB band width of baseband output Ambient temperature in operation V15 f20 B16 TA 10.8 10 Hz** 4 10 0 70 13.2 15 10 V MHz MHz MHz C Symbol min. V15 I1 V18 I14, 16 V2, 19 V13 Tj Tstg Rth SA - 40 -3 0 0 0 -3 Limit Values max. 15 5 16 5 6 6 150 125 65/77* V mA V mA V V C C K/W Unit Frequency range of sound IF output coupling stage f18 * SMD Package ** Depending on the used coupling capacitors Semiconductor Group 9 TDA 6151-5 TDA 6151-5X DC-Characteristics TA = 25 C; VS = 12 V Parameter Current consumption Input voltage Input current Output voltage of de-emphasis buffer Quiescent current of de-emphasis output Resistive load of de-emphasis output Sound IF output current Input current on de-emphasis inputs Output voltages of baseband buffer Quiescent current of baseband buffer Output voltage at low pass output Quiescent current at low pass output Resistive load of low pass output Symbol min. I15 V20 I20 V1 I1 R1/4 I18 I3,5 V16 I16 V7 VS - 3.9 - 2.5 3.35 26 3 3.5 3.75 - 2.5 1.5 350 500 5 VS VS - 3.25 - 2.6 - 3.2 4.15 - 4.2 4.95 650 Limit Values typ. 38 3.3 5 4.15 - 3.7 max. 50 3.6 6.5 4.55 - 4.8 mA V A V mA k A A V mA V V18 = 12 V V3,5 = 0.15 V V19 = 5 V, V20 = 0 VPP, V3,5 = V1 V16 = V16 + 350 mV V19 = 0 V, V20 = 0 VPP, V3,5 = V1 V7 = V7 + 350 mV V20 = 0,15 V V20 = 0 VPP V1 = V1 + 350 mV Unit Test Condition I7 R7/4 - 2.3 1.5 3.5 VS - 3.9 - 2.0 0.13 0 17 0 - 3.0 - 3.9 mA k Input current of clamping circuit I9 Output voltage of video buffer Quiescent current of video buffer Input current ext. CVBS-input Setting voltage for deviation Gain Gain (see diagram) V14 I14 I12 V19 V1/20 V1/20 6 VS - 3.2 - 2.7 0.4 21 1.5 10 VS - 2.5 - 3.4 1 5 25 3 A V mA A V dB dB V9 = 3 V, 5 V > V8 > 2 V 5 V > V13 > 2 V, V12 = 0 VPP V14 = 12 V V19 = 0 V, V19 = 5 V Semiconductor Group 10 TDA 6151-5 TDA 6151-5X DC-Characteristics (cont'd) Parameter Switching level for de-emphasis L = de-emphasis 2 M (or open) = de-emphasis 1 H = linear Symbol min. V2 0 2.3 4.0 0 2 - 300 100 V8 0 2 V10 1 5 V V - 200 200 1 3.3 5 1 5 - 100 330 V V V V V A A Limit Values typ. max. Unit Test Condition 2.8 Switching level for video switch V13 L = RF-mode H (or open) = external Input current of the switches H L Switching level for setting the clamping level L = high level (Mac operation) H (or open) = low clamping level (CVBS operation) Switching level for setting the clamping mode L = external clamping (Mac operation) H (or open) = internal (CVBSoperation) I2,13,8,10 0 2 1 5 V V Semiconductor Group 11 TDA 6151-5 TDA 6151-5X AC-Characteristics TA = 25 C; VS = 12 V Parameter Input voltage range Input impedance Sound IF-output frequency range (- 3 dB) Sound IF-output upper frequency limit (- 3 dB) Output voltage Gain 10 MHz 4 MHz 400 kHz Symbol min. V20 R20 f18 f18 V18 G1/18 0.2 22 31 4 10 30 - 17 - 26 - 80 2 2 3 14 10 2 46 Limit Values typ. max. 1 42 VPP k MHz MHz V20 = 1 V, R18/15 = 200 V20 = 1 V, R18/15 = 200 Unit Test Condition mVPP TT20 = 130 mVPP R18/15 = 200 dB dB dB VPP VPP VPP dB dB dB dB linear path (de-emphasis) V20 = 1 VPP measured at the synch pulse V9 = 2 VPP V12 = 1 VPP dB V9 = 1 VPP (without triangular signal) R18/15 = 200 Output voltage of de-emphasis buffer Output voltage of baseband buffer Output voltage Gain Gain Gain Suppression of the energy dispersal signal Output voltage video buffer Gain AV-input video buffer Gain (clamping input video buffer) External clamping pulse L = active H (or open) = inactive V1 V16 V7 V7/3;5 V16/3;5 V7/1 EDR V20 = 1 VPP V19 = 4,4 V V7 = 3 VPP V1 = 2.4 VPP V14 V14/12 V14/9 2 2 0 VPP 0 2 1 5 V V Semiconductor Group 12 TDA 6151-5 TDA 6151-5X Test Circuit Semiconductor Group 13 TDA 6151-5 TDA 6151-5X Application Circuit Semiconductor Group 14 TDA 6151-5 TDA 6151-5X Semiconductor Group 15 |
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