AD840KN Analog Devices, AD840KN Datasheet

AD840KN

Manufacturer Part Number

AD840KN

Description

Manufacturer

Analog Devices

Datasheet

1.AD840SQ.pdf (8 pages)

Specifications of AD840KN

Case

DIP

Date_code

04+

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BOSTOCK HK LIMITED

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AD840KN

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ADI

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Meier Automation Equipment Co., Limited

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AD840KN

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PRODUCT DESCRIPTION

The AD840 is a member of the Analog Devices’ family of wide

bandwidth operational amplifiers. This high speed/high precision

family includes, among others, the AD841, which is unity-

gain stable, and the AD842, which is stable at a gain of two or

greater and has 100 mA minimum output current drive. These

devices are fabricated using Analog Devices’ junction isolated

complementary bipolar (CB) process. This process permits a

combination of dc precision and wideband ac performance

previously unobtainable in a monolithic op amp. In addition

to its 400 MHz gain bandwidth product, the AD840 offers

extremely fast settling characteristics, typically settling to within

0.01% of final value in 100 ns for a 10 volt step.

The AD840 remains stable over its full operating temperature

range at closed-loop gains of 10 or greater. It also offers a low

quiescent current of 12 mA maximum, a minimum output

current drive capability of 50 mA, a low input voltage noise of

4 nV/ Hz and a low input offset voltage of 0.3 mV maximum

(AD840K).

The 400 V/ s slew rate of the AD840, along with its 400 MHz

gain bandwidth, ensures excellent performance in video and

pulse amplifier applications. This amplifier is ideally suited for

use in high frequency signal conditioning circuits and wide

REV. C

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.

FEATURES

Wideband AC Performance

Precision DC Performance

APPLICATIONS

Video and Pulse Amplifiers

DAC and ADC Buffers

Line Drivers

Available in 14-Pin Plastic DIP, Hermetic Cerdip

MIL-STD-883B Processing Available

Gain Bandwidth Product: 400 MHz (Gain

Fast Settling: 100 ns to 0.01% for a 10 V Step

Slew Rate: 400 V/ s

Stable at Gains of 10 or Greater

Full Power Bandwidth: 6.4 MHz for 20 V p-p into a

Input Offset Voltage: 0.3 mV max

Input Offset Drift: 3 V/ C typ

Input Voltage Noise: 4 nV/ Hz

Open-Loop Gain: 130 V/mV into a 1 k

Output Current: 50 mA min

Supply Current: 12 mA max

and 20-Pin LCC Packages and in Chip Form

500

Load

10)

APPLICATION HIGHLIGHTS

1. The high slew rate and fast settling time of the AD840 make

2. The AD840 is truly a precision amplifier. It offers 12-bit

3. The AD840’s thermally balanced layout and the high speed

4. Laser wafer trimming reduces the input offset voltage to

5. Full differential inputs provide outstanding performance

6. The AD840 is an enhanced replacement for the HA2540.

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

Tel: 617/329-4700

bandwidth active filters. The extremely rapid settling time of the

AD840 makes it the preferred choice for data acquisition appli-

cations which require 12-bit accuracy. The AD840 is also ap-

propriate for other applications such as high speed DAC and

ADC buffer amplifiers and other wide bandwidth circuitry.

it ideal for DAC and ADC buffers, line drivers and all types

of video instrumentation circuitry.

accuracy to 0.01% or better and wide bandwidth, perfor-

mance previously available only in hybrids.

of the CB process allow the AD840 to settle to 0.01% in

100 ns without the long “tails” that occur with other fast op

amps.

0.3 mV max on the K grade, thus eliminating the need for

external offset nulling in many applications. Offset null pins

are provided for additional versatility.

in all standard high frequency op amp applications where

circuit gain will be 10 or greater.

Plastic DIP (N) Package

Cerdip (Q) Package

and

CONNECTION DIAGRAMS

Fast Settling Op Amp

LCC (E) Package

Wideband,

AD840

Fax: 617/326-8703

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