REV. B

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a

AD9283

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

8-Bit, 50 MSPS/80 MSPS/100 MSPS

3 V A/D Converter

FUNCTIONAL BLOCK DIAGRAM

REF

TIMING

PWRDWN

GND

REF

OUT

REF

IN

ADC

OUTPUT

STAGING

ENCODE

AD9283

8

D7–D0

T/H

FEATURES

8-Bit, 50, 80 and 100 MSPS ADC

Low Power: 90 mW at 100 MSPS

On-Chip Reference and Track/Hold

475 MHz Analog Bandwidth

SNR = 46.5 dB @ 41 MHz at 100 MSPS

1 V p-p Analog Input Range

Single +3.0 V Supply Operation (2.7 V–3.6 V)

Power-Down Mode: 4.2 mW

APPLICATIONS

Battery Powered Instruments

Hand-Held Scopemeters

Low Cost Digital Oscilloscopes

GENERAL DESCRIPTION

The AD9283 is an 8-bit monolithic sampling analog-to-digital

converter with an on-chip track-and-hold circuit and is opti-

mized for low cost, low power, small size and ease of use. The

product operates at a 100 MSPS conversion rate, with outstand-

ing dynamic performance over its full operating range.

The ADC requires only a single 3.0 V (2.7 V to 3.6 V) power

supply and an encode clock for full performance operation. No

external reference or driver components are required for many

applications. The digital outputs are TTL/CMOS compatible

and a separate output power supply pin supports interfacing

with 3.3 V or 2.5 V logic.

The encoder input is TTL/CMOS compatible. A power-down

function may be exercised to bring total consumption to

4.2 mW. In power-down mode, the digital outputs are driven

to a high impedance state.

Fabricated on an advanced CMOS process, the AD9283 is

available in a 20-lead surface mount plastic package (SSOP)

specified over the industrial temperature range (–40

°C to +85°C).