CS7622 datasheet(7/36 Pages) CIRRUS

номер детали	CS7622

подробное описание детали	CCD Imager Analog Processor

PDF	36 Pages

Scroll/Zoom	100%

производитель	CIRRUS [Cirrus Logic]

домашняя страница	http://www.cirrus.com

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CS7622

DS322PP1

2.0 GENERAL DESCRIPTION

The CS7622 forms the heart of a four chip digital

CCD Camera. The four chips include the CCD im-

ager, the CS7622 CCD digitizer, a vertical drive in-

terface chip and a backend DSP chip to further

process the digital data (see Figure 4.)

The patented DRX technology allows the CS7622

to output data with 13-bit dynamic range, and at the

same time reducing the power consumption to a 10-

bit equivalent A/D converter.

The digitized output is either available in 13-bits,

12-bits or 10-bits. The 10-bit output is created by

companding the 13-bit A/D output to 10-bits. The

companding curve consists of 4 linear segments,

where each slope and each start point is user pro-

grammable.

A block diagram of the CS7622 chip is shown in

Figure 5.

CCD

Vertical Drive

DC-DC converter

Backend

DSP

LCD Panel

Video Output

+5 V

+5 V to -5 V

CDS/ADC

Control

CS7622

Timing Signals

Figure 4. Digital Camera Block Diagram

AIN

SEN

SDATI SDATO SCLK

BG_RES

REF_CAPN

REF_CAPP

RST

TEST

CLAMP

CLKO

DOUT[12:0]

(up to 3 may be unused)

GND[2]

VDD[2]

CDS/VGA

A/D

Gain

Adjust

13 to 10-bit

Compander

Black

Level

Serial Interface

Reference

1 µF

10 k

Ω

CK_FT

CK_DATA

Clock

Generator

Figure 5. CS7622 Block Diagram

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