AD9845B(RevA) View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

AD9845B
(Rev.:RevA)

Complete 12-Bit 30 MSPS CCD Signal Processor

Analog Devices 

AD9845B

APPLICATIONS INFORMATION

The AD9845B 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 AD9845B analog input through a series input capacitor.

The AD9845B performs the dc restoration, CDS, gain adjust-

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

The AD9845B’s digital output data is then processed by the

image processing ASIC. The internal registers of the

AD9845B—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.

CCD

VOUT

V-DRIVE

BUFFER

0.1 ␮ F

AD9845B

CCDIN

ADCOUT

REGISTER

DATA

DIGITAL

OUTPUTS

SERIAL

INTERFACE

CCD

TIMING

CDS/CLAMP

TIMING

TIMING

GENERATOR

DIGITAL IMAGE

PROCESSING

ASIC

Figure 32. System Applications Diagram

–20–

REV. A

Share Link: