BA7149F Rohm, BA7149F Datasheet
BA7149F
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BA7149F Summary of contents
Page 1
... Electronic viewfinder driver BA7149F The BA7149F is an electronic viewfinder driver for video cameras. It separates the synchronous signal from the input video signal, and outputs the vertical deflection drive output and horizontal deflection signals. HD and VD output sig- nals with guaranteed phase difference are also provided for on-screen displays (OSD). The differences between the BA7149F and the BA7148F are the horizontal blanking, horizontal AFC output, HD output phase and pulse width. • ...
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... Vertical oscillator external capacitor 8 VD output PHASE H.OSC 6dB COMP AMP H.BLK V.BLK V.DRIVE Pin No output 10 GND 2 11 Video input 12 Power supply 2 13 Video output 14 Phase comparator output 15 Horizontal oscillator external resistor 16 Horizontal AFC output SYNC SEPA V.SEPA V.OSC Function BA7149F ...
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... HPL f 51.3 54.8 58.2 V · 2.10 2.70 — VP · Max. V 2.10 2.70 — VN · Max. T 17.3 21.3 25.3 HVD T 8.7 9.9 11 860 960 1060 VD V — 0.1 0.3 HV · 4.7 4.9 — HV · H BA7149F Unit P P kHz kHz P ...
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... Fig.2 8pin 2pin 20k 8pin 10k 20k Fig.5 11pin 50 11pin 12pin 1.87V 1.25k 36 A 100 100 Fig.8 BA7149F 6pin 12pin 12k V 1.5V 6pin Fig.3 9pin 2pin 10k 20k 9pin 25k Fig.6 14pin 12pin 14pin Fig.9 ...
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... The horizontal and vertical blanking signals generated in the H. OSC and V. OSC blocks are used to erase the hor- izontal retrace line from the video signal input to pin 11. The signal is inverted and amplified by a 6dB inverting amplifier and output as a negative-polarity video signal. 2pin V Pulse only BA7149F 5 ...
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... VIDEO OUT 100 15k 1 + 1500pF 100k + 10k 1 + 390k PHASE H.OSC 6dB COMP AMP H.BLK V.DRIVE 5mH + 36 VR1 3.9 100 Fig.13 BA7149F V CC VIDEO IN 470 470 HD 0.22 + 510k SYNC SEPA V.SEPA V.BLK V.OSC 15k 0.1 VD 2%, and a temperature 5%, and a temperature coefficient of ...
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... In particular, to prevent the FBT return current from interfering with the V. OSC circuit on pins 6 and 7, do not directly connect the pin 4 GND and pin 6 and 7 GND. FBT Do not connect pin 4 GND to pin 6 and 7 GND. 0.15 BA7149F ...