REV. B

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a

AD9058

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., 2000

Dual 8-Bit 50 MSPS

A/D Converter

FUNCTIONAL BLOCK DIAGRAM

ENCODE

8-BIT

ANALOG-

TO-

DIGITAL

CONVERTER

8

+2 V

REF

ENCODE

AD9058

8-BIT

ANALOG-

TO-

DIGITAL

CONVERTER

8

A

B

QUADRATURE RECEIVER

8

Q

8

I

RF

LO

G

G

AD9058

90°

GENERAL DESCRIPTION

The AD9058 combines two independent high performance

8-bit analog-to-digital converters (ADCs) on a single mono-

lithic IC. Combined with an optional onboard voltage refer-

ence, the AD9058 provides a cost effective alternative for

systems requiring two or more ADCs.

Dynamic performance (SNR, ENOB) is optimized to provide

up to 50 MSPS conversion rates. The unique architecture

results in low input capacitance while maintaining high per-

formance and low power (<0.5 watt/channel). Digital inputs

and outputs are TTL compatible.

Performance has been optimized for an analog input of 2 V

p-p (

± 1 V; 0 V to +2 V). Using the onboard +2 V voltage

reference, the AD9058 can be set up for unipolar positive

operation (0 V to +2 V). This internal voltage reference can

drive both ADCs.

Commercial (0

°C to +70°C) and military (–55°C to +125°C)

temperature range parts are available. Parts are supplied in

hermetic 48-lead DIP and 44-lead “J” lead packages.

FEATURES

Two Matched ADCs on Single Chip

50 MSPS Conversion Speed

On-Board Voltage Reference

Low Power (<1W)

Low Input Capacitance (10 pF)

65 V Power Supplies

Flexible Input Range

APPLICATIONS

Quadrature Demodulation for Communications

Digital Oscilloscopes

Electronic Warfare

Radar