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CS7615 Datasheet(PDF) 1 Page - Cirrus Logic |
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CS7615 Datasheet(HTML) 1 Page - Cirrus Logic |
1 / 36 page Preliminary Product Information This document contains information for a new product. Cirrus Logic reserves the right to modify this product without notice. 1 Copyright © Cirrus Logic, Inc. 1998 (All Rights Reserved) Cirrus Logic, Inc. Crystal Semiconductor Products Division P.O. Box 17847, Austin, Texas 78760 (512) 445 7222 FAX: (512) 445 7581 http://www.crystal.com CS7615 CCD Imager Analog Processor Features l 10-Bit A/D Converter l Multi-Sync CCD Timing Generator, handles imagers up to 1000 pixels wide l Integrated Correlated Double Sampler l 38 dB Automatic Analog Gain Control l Up to 90 dB Total Gain Adjust Range l Closed-Loop “Fuzzy” AGC/Exposure l Code 16 Black Level Clamp l I2C Control Bus l 4-Phase Vertical CCD Timing Signals l No CCD Buffer Amplifier Required l Master Clock or Crystal Controlled 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 im- proved 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 compli- ance 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 compli- ance for images up to 720 pixels wide, and is compatible with both NTSC and PAL timing. The CS7615 is de- signed to be used along with either the CS7665 or CS7666 Digital Color-Space Processor for CCD Camer- as, which generates a 4:2:2 component digital video output. ORDERING INFORMATION CS7615-KQ 0° to +70° C 44-pinTQFP (10 mm × 10 mm × 1.6 mm) CCD Output Master Clock CDS/AGC Data Out PLL Output Register I2C Block Formatter A/D Converter Black Level Timing Generator AGC Controller CCD Timing Signals I2C Bus Clocks Out JUL ‘98 DS231PP6 |
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