ad844sq-883b Analog Devices, Inc., ad844sq-883b Datasheet

ad844sq-883b

Manufacturer Part Number

ad844sq-883b

Description

60 Mhz, 2000 V/us Monolithic Op Amp

Manufacturer

Analog Devices, Inc.

Datasheet

1.AD844SQ-883B.pdf (16 pages)

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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 that

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective companies.

GENERAL DESCRIPTION

The AD844 is a high speed monolithic operational amplifier

fabricated using Analog Devices’ junction isolated complemen-

tary bipolar (CB) process. It combines high bandwidth and very

fast large signal response with excellent dc performance. Although

optimized for use in current-to-voltage applications and as an

inverting mode amplifier, it is also suitable for use in many

noninverting applications.

The AD844 can be used in place of traditional op amps, but its

current feedback architecture results in much better ac perfor-

mance, high linearity, and an exceptionally clean pulse response.

This type of op amp provides a closed-loop bandwidth that is

determined primarily by the feedback resistor and is almost inde-

pendent of the closed-loop gain. The AD844 is free from the slew

rate limitations inherent in traditional op amps and other

current-feedback op amps. Peak output rate of change can be over

2000 V/µs for a full 20 V output step. Settling time is typically

100 ns to 0.1%, and essentially independent of gain. The AD844

can drive 50 Ω loads to ± 2.5 V with low distortion and is short

circuit protected to 80 mA.

The AD844 is available in four performance grades and three

package options. In the 16-lead SOIC (R) package, the AD844J is

specified for the commercial temperature range of 0°C to 70°C.

The AD844A and AD844B are specified for the industrial

temperature range of –40°C to +85°C and are available in the

REV. E

FEATURES

Wide Bandwidth: 60 MHz at Gain of –1

Wide Bandwidth: 33 MHz at Gain of –10

Very High Output Slew Rate: Up to 2000 V/ s

20 MHz Full Power Bandwidth, 20 V p-p, R

Fast Settling: 100 ns to 0.1% (10 V Step)

Differential Gain Error: 0.03% at 4.4 MHz

Differential Phase Error: 0.158 at 4.4 MHz

Low Offset Voltage: 150 mV Max (B Grade)

Low Quiescent Current: 6.5 mA

Available in Tape and Reel in Accordance with

APPLICATIONS

Flash ADC Input Amplifiers

High Speed Current DAC Interfaces

Video Buffers and Cable Drivers

Pulse Amplifiers

EIA-481A Standard

= 500

CERDIP (Q) package. The AD844A is also available in an

8-lead PDIP (N). The AD844S is specified over the military tem-

perature range of –55°C to +125°C. It is available in the

8-lead CERDIP (Q) package. A and S grade chips and devices

processed to MIL-STD-883B, REV. C are also available.

PRODUCT HIGHLIGHTS

1. The AD844 is a versatile, low cost component providing an

2. It is essentially free from slew rate limitations. Rise and fall

3. The AD844 can be operated from ± 4.5 V to ± 18 V power

4. The offset voltage and input bias currents of the AD844 are

5. The AD844 exhibits excellent differential gain and differen-

6. The AD844 combines low distortion, low noise, and low

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

Tel: 781/329-4700

Fax: 781/326-8703

NULL

–V

CERDIP (Q) Packages

–IN

+IN

8-Lead PDIP (N) and

excellent combination of ac and dc performance.

times are essentially independent of output level.

supplies and is capable of driving loads down to 50 Ω, as well

as driving very large capacitive loads using an external network.

laser trimmed to minimize dc errors; V

1 µV/°C and bias current drift is typically 9 nA/°C.

tial phase characteristics, making it suitable for a variety of

video applications with bandwidths up to 60 MHz.

drift with wide bandwidth, making it outstanding as an

input amplifier for flash A/D converters.

(Not to Scale)

TOP VIEW

AD844

CONNECTION DIAGRAMS

NULL

OUTPUT

60 MHz, 2000 V/ s

Monolithic Op Amp

OFFSETNULL

–IN

+IN

V–

16-Lead SOIC

(R) Package

NC = NO CONNECT

(Not to Scale)

TOP VIEW

AD844

drift is typically

www.analog.com

OFFSETNULL

V+

OUTPUT

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