REV. B

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.

a

AD9054A

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

8-Bit, 200 MSPS

A/D Converter

FUNCTIONAL BLOCK DIAGRAM

ENCODE

ENCODE

AD9054A

T/H

AIN

AIN

GND

2.5V REFERENCE

8

8

ENCODE

LOGIC

DEMULTIPLEXER

DS

DS

DEMUX

QUANTIZER

VREF IN

VREF OUT

TIMING

FEATURES

200 MSPS Guaranteed Conversion Rate

135 MSPS Low Cost Version Available

350 MHz Analog Bandwidth

1 V p-p Analog Input Range

Internal +2.5 V Reference and T/H

Low Power: 500 mW

+5 V Single Supply Operation

TTL Output Interface

Single or Demultiplexed Output Ports

APPLICATIONS

RGB Graphics Processing

High Resolution Video

Digital Data Storage Read Channels

Digital Communications

Digital Instrumentation

Medical Imaging

GENERAL DESCRIPTION

The AD9054A is an 8-bit monolithic analog-to-digital converter

optimized for high speed, low power, small size and ease of use.

With a 200 MSPS encode rate capability and full-power analog

bandwidth of 350 MHz, the component is ideal for applications

requiring the highest possible dynamic performance.

To minimize system cost and power dissipation, the AD9054A

includes an internal +2.5 V reference and track-and-hold circuit.

The user provides only a +5 V power supply and an encode clock.

No external reference or driver components are required for

many applications.

The AD9054A’s encode input interfaces directly to TTL, CMOS

or positive-ECL logic and will operate with single-ended or

differential inputs. The user may select dual-channel or single-

channel digital outputs. The dual (demultiplexed) mode inter-

leaves ADC data through two 8-bit channels at one-half the

clock rate. Operation in demultiplexed mode reduces the speed

and cost of external digital interfaces while allowing the ADC to

be clocked to the full 200 MSPS conversion rate. In the single-

channel (nondemultiplexed) mode, all data is piped at the full

clock rate to the Channel A outputs.

Fabricated with an advanced BiCMOS process, the AD9054A is

provided in a space-saving 44-lead LQFP surface mount plastic

package (ST-44) and specified over the full industrial (–40

°C to

+85

°C) temperature range.