ANALOG DEVICES AD9979 Service Manual

14-Bit, CCD Signal Processor with

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FEATURES

1.8 V analog and digital core supply voltage Correlated double sampler (CDS) with –3 dB, 0 dB, +3 dB, and

+6 dB

gain 6 dB to 42 dB 10-bit variable gain amplifier (VGA) 14-bit 65 MHz analog-to-digital converter Black-level clamp with variable level control Complete on-chip timing generator Precision Timing c On-chip 3 V horizontal and RG drivers General-purpose outputs (GPOs) for shutter and system

sup

port 7 mm × 7 mm, 48-lead LFCSP package Internal LDO regulator circuitry

APPLICATIONS

Professional HDTV camcorders Professional/high end digital cameras Broadcast cameras Industrial high speed cameras

ore with 240 ps resolution @ 65 MHz

Precision Timing™ Core

AD9979

GENERAL DESCRIPTION

The AD9979 is a highly integrated CCD signal processor for high speed digital video camera applications. Specified at pixel rates of up to 65 MHz, the AD9979 consists of a complete analog front end with analog-to-digital conversion, combined with a programmable timing driver. The Precision Timing core allows adjustment of high speed clocks with approximately 240 ps resolution at 65 MHz operation.

The analog front end includes black-level clamping, CDS, VGA, a

nd a 65 MSPS, 14-bit analog-to-digital converter. The timing driver provides the high speed CCD clock drivers for RG, HL, and H1 to H4. Operation is programmed using a 3-wire serial interface.

Available in a space-saving, 7 mm × 7 mm, 48-lead LFCSP

ackage, the AD9979 is specified over an operating temperature

p range of −25°C to +85°C.

FUNCTIONAL BLOCK DIAGRAM

REFT REFB

AD9979

CCDINP

CCDINM

LDOOUT

H1 TO H4

CDS

–3dB, 0dB, +3dB, +6dB

LDO

HORIZONTAL

DRIVERS

VGA

6dB TO 42d B

INTERNAL CLO CKS

PRECISION

TIMING

CORE

SYNC

GENERATOR

HD VD

Figure 1.

VREF

ADC

CLAMP

INTERNAL

REGISTERS

SCK SDATA

DOUT

D0 TO D13

CLI

05957-001

Rev. Sp0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.

AD9979

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