AD9002SD/883B View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

AD9002SD/883B

High Speed 8-Bit Monolithic A/D Converter

Analog Devices 

a

High Speed 8-Bit

Monolithic A/D Converter

AD9002

FEATURES

150 MSPS Encode Rate

Low Input Capacitance: 17 pF

Low Power: 750 mW

–5.2 V Single Supply

MIL-STD-883 Compliant Versions Available

APPLICATIONS

Radar Systems

Digital Oscilloscopes/ATE Equipment

Laser/Radar Warning Receivers

Digital Radio

Electronic Warfare (ECM, ECCM, ESM)

Communication/Signal Intelligence

GENERAL DESCRIPTION

The AD9002 is an 8-bit, high speed, analog-to-digital converter.

The AD9002 is fabricated in an advanced bipolar process that

allows operation at sampling rates in excess of 150 megasamples/

second. Functionally, the AD9002 is comprised of 256 parallel

comparator stages whose outputs are decoded to drive the ECL

compatible output latches.

An exceptionally wide large signal analog input bandwidth of

160 MHz is due to an innovative comparator design and very

close attention to device layout considerations. The wide input

bandwidth of the AD9002 allows very accurate acquisition of

high speed pulse inputs, without an external track-and-hold.

The comparator output decoding scheme minimizes false codes,

which is critical to high speed linearity.

The AD9002 provides an external hysteresis control pin that

can be used to optimize comparator sensitivity to further im-

prove performance. Additionally, the AD9002’s low power

dissipation of 750 mW makes it usable over the full extended

temperature range. The AD9002 also incorporates an overflow

FUNCTIONAL BLOCK DIAGRAM

OVERFLOW

INHIBIT

ANALOG IN

+VREF

REFMID

–VREF

ENCODE

ENCODE

AD9002

R

256

OVERFLOW

R

255

BIT 8 (MSB)

D

E

BIT 7

R

C

128

O

D

L

BIT 6

I

A

R/2

N

G

T

C

BIT 5

H

R/2

L

127

O

BIT 4

G

I

R

C

BIT 3

2

BIT 2

R

1

BIT 1 (LSB)

GND

HYSTERESIS

–VS

bit to indicate overrange inputs. This overflow output can be

disabled with the overflow inhibit pin.

The AD9002 is available in two grades, one with 0.5 LSB lin-

earity and one with 0.75 LSB linearity. Both versions are offered

in an industrial grade, –25°C to +85°C, packaged in a 28-lead

DIP and a 28-leaded JLCC. The military temperature range

devices, –55°C to +125°C, are available in ceramic DIP and

LCC packages and comply with MIL-STD-883 Class B.

REV. D

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.

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

© Analog Devices, Inc., 1999

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