AD706ARZREEL Analog Devices, AD706ARZREEL Datasheet

AD706ARZREEL

Manufacturer Part Number

AD706ARZREEL

Description

SOP8

Manufacturer

Analog Devices

Datasheet

1.AD706ARZREEL.pdf (12 pages)

Specifications of AD706ARZREEL

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GENERAL DESCRIPTION

The AD706 is a dual, low power, bipolar op amp that has the

low input bias current of a JFET amplifier, but which offers a

significantly lower I

bipolar input transistors to achieve picoampere input bias current

levels (similar to FET input amplifiers at room temperature),

while its I

JFET amp, for which I

increase at 125°C). The AD706 also achieves the microvolt

offset voltage and low noise characteristics of a precision bipolar

input amplifier.

Since it has < 200 pA of bias current, the AD706 does not

require the commonly used “balancing” resistor. Furthermore,

the current noise is only 50 fA/√Hz, which makes this amplifier

usable with very high source impedances. At 600 A max supply

current (per amplifier), the AD706 is well suited for today’s

high density boards.

The AD706 is an excellent choice for use in low frequency

active filters in 12-bit and 14-bit data acquisition systems, in

precision instrumentation, and as a high quality integrator. The

AD706 is internally compensated for unity gain and is available

in five performance grades. The AD706J is rated over the

commercial temperature range of 0°C to +70°C. The AD706A is

rated for the extended industrial temperature range of –40°C

to +85°C.

The AD706 is offered in two varieties of an 8-lead package:

plastic mini-DIP and surface-mount (SOIC).

REV. E

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 owners.

FEATURES

High DC Precision

100 V Max Offset Voltage

1.5 V/ C Max Offset Drift

200 pA Max Input Bias Current

0.5 V p-p Voltage Noise, 0.1 Hz to 10 Hz

750 A Supply Current

Available in 8-Lead Plastic Mini-DlP

Available in Tape and Reel in Accordance with

Quad Version: AD704

APPLICATIONS

Low Frequency Active Filters

Precision Instrumentation

Precision Integrators

and Surface-Mount (SOIC) Packages

EIA-481A Standard

typically only increases by 5

drift over temperature. It utilizes superbeta

doubles every 10°C for a 1000

at 125°C (unlike a

PRODUCT HIGHLIGHTS

1. The AD706 is a dual low drift op amp that offers JFET

2. The AD706 provides both low drift and high dc precision.

3. The AD706 can be used in applications where a chopper

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

Tel: 781/329-4700

Fax: 781/326-8703

level input bias currents, yet has the low I

amplifier. It may be used in circuits using dual op amps

such as the LT1024.

amplifier would normally be required but without the

chopper’s inherent noise.

0.01

100

0.1

Figure 1. Input Bias Current vs. Temperature

–55

AMPLIFIER 1

OUTPUT

Current Bipolar Op Amp

Dual Picoampere Input

CONNECTION DIAGRAM

Plastic SOIC (R) Packages

Plastic Mini-DIP (N) and

–IN

V–

+25

TYPICAL JFET AMP

TEMPERATURE – C

TOP VIEW

AD706

AMPLIFIER 2

+110

OUTPUT

–IN

AD706

drift of a bipolar

www.analog.com

+125

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