CS7615

Features:

`10-Bit A/D Converter
`Multi-Sync CCD Timing Generator, handles imagers up to 1000 pixels wide
`Integrated Correlated Double Sampler
`38 dB Automatic Analog Gain Control
`Up to 90 dB Total Gain Adjust Range
`Closed-Loop "Fuzzy" AGC/Exposure
`Code 16 Black Level Clamp
`I²C Control Bus
`4-Phase Vertical CCD Timing Signals
`No CCD Buffer Amplifier Required
`Master Clock or Crystal Controlled


Specifications

Parameter	Symbol	Min	Max	Unit
Power Supply Voltage	VAA, VDD	-0.3	7.0	V
Digital Input Voltage Range		GNDD-0.3	VDD + 0.3	V
Analog Input Voltage - AIN only	AIN	GNDA-(0.3)	20	V
Input Current (except supply pins)		GND - 0.3	10	mA
Ambient Temperature Range		-	+70	°C
Lead Solder Temperature (10 s duration)		-	+260	°C
Storage Temperature Range		-65	+160	°C

Description

The CS7615 is a low-power Analog front-end processor for standard four-color interline transfer CCD imagers. The architecture includes a correlated double sampler, AGC amplifier, black-level clamp, 10-Bit A/D converter, and a complete multi-sync CCD timing generator. The analog CCD imager output can be directly connected to the CS7615 input, which does not require an external buffer amplifier. The pixel data is double sampled for improved noise performance, and gain adjusted prior to being digitized by the A/D converter. Feedback from the A/D converter holds the image black level at code-16 (assumes 8-bit data path), addressing ITU-601 compliance issues. The multi-sync CCD timing generator is programmed via the I²C bus, and can be used with a wide range of interline transfer CCD imagers up to 1000 pixels wide. The CS7615 supports full ITU-601 compliance for images up to 720 pixels wide, and is compatible with both NTSC and PAL timing. The CS7615 is designed to be used along with either the CS7665 or CS7666 Digital Color-Space Processor for CCD Cameras, which generates a 4:2:2 component digital video output.