FUNCTIONAL BLOCK DIAGRAM

1

2

3

45

6

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8

AD783

IN

COMMON

NC

OUT

S/H

NC

NC = NO CONNECT

X1

REV. A

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

Complete Very High Speed

Sample-and-Hold Amplifier

AD783*

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

FEATURES

Acquisition Time to 0.01%: 250 ns Typical

Low Power Dissipation: 95 mW

Low Droop Rate: 0.02

V/ s

Fully Specified and Tested Hold Mode Distortion

Total Harmonic Distortion: –85 dB

Aperture Jitter: 50 ps Maximum

Internal Hold Capacitor

Self-Correcting Architecture

8-Pin Mini Cerdip and SOIC Packages

PRODUCT DESCRIPTION

The AD783 is a high speed, monolithic sample-and-hold

amplifier (SHA). The AD783 offers a typical acquisition time

of 250 ns to 0.01%. The AD783 is specified and tested for hold

mode total harmonic distortion with input frequencies up to

100 kHz. The AD783 is configured as a unity gain amplifier

and uses a patented self-correcting architecture that minimizes

hold mode errors and ensures accuracy over temperature. The

AD783 is self-contained and requires no external components

or adjustments.

The AD783 retains the held value with a droop rate of 0.02

µV/

µs. Excellent linearity and hold mode dc and dynamic perfor-

mance make the AD783 ideal for high speed 12- and 14-bit

analog-to-digital converters.

The AD783 is manufactured on Analog Devices’ ABCMOS

process which merges high performance, low noise bipolar

circuitry with low power CMOS to provide an accurate, high

speed, low power SHA.

The J grade device is specified for operation from 0

°C to +70°C

and the A grade from –40

°C to +85°C. The J and A grades are

available in 8-pin cerdip and SOIC packages. The military

temperature range version is specified for operation from –55

°C

to +125

°C and is available in an 8-pin cerdip package. For

details refer to the Analog Devices Military Products Databook or

AD783/883B data sheet.

*Protected by U.S. Patent Number 4,962,325.

PRODUCT HIGHLIGHTS

1. Fast acquisition time (250 ns), low aperture jitter (20 ps) and

fully specified hold mode distortion make the AD783 an

ideal SHA for sampling systems.

2. Low droop (0.02

µV/µs) and internally compensated hold

mode error result in superior system accuracy.

3. Low power (95 mW typical), complete functionality and

small size make the AD783 an ideal choice for a variety of

high performance applications.

4. The AD783 requires no external components or adjustments.

5. The AD783 is an excellent choice as a front-end SHA for

high speed analog-to-digital converters such as the AD671,

AD7586, AD674B, AD774B, AD7572 and AD7672.

6. Fully specified and tested hold mode distortion guarantees

the performance of the SHA in sampled data systems.