cxa1690q Sony Electronics, cxa1690q Datasheet - Page 14

• Manufacturer Part Number: cxa1690q
• Description: Head Amplifier For Digital Ccd Cameras
• Manufacturer: Sony Electronics

2. Video signal processing system
Operating conditions
The video signal processing system has two modes: LIN signal mode and PBREC signal mode.
The video signal processing system operates in LIN signal mode when CAM/VIDEO is Low, and PB/REC is
High.
The video signal processing system operates in PBREC signal mode when PB/REC is High.
Video Signal Processing System Timing Chart
LIN signal mode
LINCLP:
LINAMP:
VISW:
VISH:
LOUTCLP:
(CLPDRV output)
The video signal enters the LIN pin. LINCLP sync tip clamps the input signal to allow full input.
The input signal level and frequency are respectively 500mVp-p (typ.) and DC up to approx. 7MHz.
This is a 9.5dB gain amplifier.
VISW switches between the LIN signal and PBRFC signal for the video signal processing system.
The signals are switched according to the input conditions of the CAM/VIDEO and PB/REC pins.
The VISH is used for video signal processing system. It is a sample-and-hold circuit which synchronizes the
data read-in timing for the external A/D. The slew rate of the input signal for the sample-and-hold circuit can
be controlled by adjusting the input current to VSHI.
LOUTCLP is a clamp circuit which operates when the LIN signal is output by the DRV. The clamp potential is
2V.
LINGCA output
DRVOUT output
LIN mode
LIN input
9.5dB
VISP
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CXA1690Q
2.1V
2.5V
1.4V
(2V)