AD9802 Analog Devices, AD9802 Datasheet

AD9802

Manufacturer Part Number

AD9802

Description

CCD Signal Processor For Electronic Cameras

Manufacturer

Analog Devices

Datasheet

1.AD9802.pdf (20 pages)

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PRODUCT DESCRIPTION

The AD9802 is a complete CCD signal processor developed

for electronic cameras. It is suitable for both camcorder and

consumer-level still camera applications.

The signal processing chain is comprised of a high speed CDS,

variable gain PGA and 10-bit ADC. Required clamping cir-

cuitry and an onboard voltage reference are provided as well as a

direct ADC input. The AD9802 operates from a single +3 V

supply with a typical power consumption of 185 mW.

The AD9802 is packaged in a space saving 48-terminal thin

quad flatpack (TQFP) and is specified over an operating tem-

perature range of 0 C to +70 C.

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

FEATURES

10-Bit, 18 MSPS A/D Converter

18 MSPS Full Speed Correlated Double Sampler (CDS)

Low Noise, Wideband PGA

Internal Voltage Reference

No Missing Codes Guaranteed

+3 V Single Supply Operation

Low Power CMOS: 185 mW

48-Terminal TQFP Package

PRODUCT HIGHLIGHTS

1. On-Chip Input Clamp and CDS

2. On-Chip PGA

3. Direct ADC Input

4. 10-Bit, High Speed A/D Converter

5. Low Power

6. Digital I/O Functionality

7. Small Package

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

ADCIN

DIN

Clamp circuitry and high speed correlated double sampler

allow for simple ac-coupling to interface a CCD sensor at full

18 MSPS conversion rate.

The AD9802 includes a low-noise, wideband amplifier with

analog variable gain from 0 dB to 31.5 dB (linear in dB).

A direct input to the 10-bit A/D converter is provided for

digitizing video signals.

A linear 10-bit ADC is capable of digitizing CCD signals at

the full 18 MSPS conversion rate. Typical DNL is 0.5 LSB

and no missing code performance is guaranteed.

At 185 mW, and 15 mW in power-down, the AD9802 con-

sumes a fraction of the power of presently available multichip

solutions.

The AD9802 offers three-state digital output control.

Packaged in a 48-terminal, surface-mount thin quad flatpack,

the AD9802 is well suited to very compact, low headroom

designs.

CMLEVEL VRT VRB STBY

PBLK

REFERENCE

FUNCTIONAL BLOCK DIAGRAM

CLPDM

CLAMP

CDS

For Electronic Cameras

CCD Signal Processor

World Wide Web Site: http://www.analog.com

PGACONT1 PGACONT2

PGA

CLPOB

CLAMP

MUX

ADCMODE

S/H

SHP

AD9802

ACVDD

GENERATOR

AD9802

TIMING

SHD ADCCLK

A/D

ADVDD

DRVDD

DVDD

DOUT

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