AD9846A datasheet(20/24 Pages) AD

20 / 24 page

REV. 0

AD9846A

–20–

CCD

CCDIN

BUFFER

VOUT

0.1 F

AD9846A

ADCOUT

DATA

SERIAL

INTERFACE

DIGITAL

OUTPUTS

DIGITAL IMAGE

PROCESSING

ASIC

TIMING

GENERATOR

V-DRIVE

CCD

TIMING

CDS/CLAMP

TIMING

Figure 32. System Applications Diagram

APPLICATIONS INFORMATION

The AD9846A is a complete Analog Front End (AFE) product

for digital still camera and camcorder applications. As shown in

Figure 32, the CCD image (pixel) data is buffered and sent to

the AD9846A analog input through a series input capacitor. The

AD9846A performs the dc restoration, CDS, gain adjustment,

black level correction, and analog-to-digital conversion. The

AD9846A’s digital output data is then processed by the image

processing ASIC. The internal registers of the AD9846A—used

to control gain, offset level, and other functions—are programmed

by the ASIC or microprocessor through a 3-wire serial digital

interface. A system timing generator provides the clock signals

for both the CCD and the AFE.

AD9846A Datasheet(PDF) 20 Page - Analog Devices