AD9802JST

Manufacturer Part NumberAD9802JST
ManufacturerAnalog Devices
AD9802JST datasheets

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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 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.
CCD Signal Processor
For Electronic Cameras
FUNCTIONAL BLOCK DIAGRAM
PBLK
CLPDM
PGACONT1 PGACONT2
CLAMP
PIN
PGA
CDS
DIN
MUX
ADCIN
CLAMP
REFERENCE
CMLEVEL VRT VRB STBY
CLPOB
ADCMODE
PRODUCT HIGHLIGHTS
1. On-Chip Input Clamp and CDS
Clamp circuitry and high speed correlated double sampler
allow for simple ac-coupling to interface a CCD sensor at full
18 MSPS conversion rate.
2. On-Chip PGA
The AD9802 includes a low-noise, wideband amplifier with
analog variable gain from 0 dB to 31.5 dB (linear in dB).
3. Direct ADC Input
A direct input to the 10-bit A/D converter is provided for
digitizing video signals.
4. 10-Bit, High Speed A/D Converter
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.
5. Low Power
At 185 mW, and 15 mW in power-down, the AD9802 con-
sumes a fraction of the power of presently available multichip
solutions.
6. Digital I/O Functionality
The AD9802 offers three-state digital output control.
7. Small Package
Packaged in a 48-terminal, surface-mount thin quad flatpack,
the AD9802 is well suited to very compact, low headroom
designs.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
AD9802
SHP
SHD ADCCLK
TIMING
GENERATOR
10
S/H
A/D
DOUT
DRVDD
AD9802
DVDD
ACVDD
ADVDD
© Analog Devices, Inc., 1997

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AD9802JST Summary of contents

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