Datasheet > AD706TQ

AD706TQ

更新时间： 2024-11-04 21:17:51

品牌	Logo	应用领域
亚德诺 - ADI		放大器
页数	文件大小	规格书
12页	214K
描述
IC DUAL OP-AMP, 50 uV OFFSET-MAX, 0.8 MHz BAND WIDTH, CDIP8, HERMETIC SEALED, CERDIP-8, Operational Amplifier

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AD706TQ 数据手册

Dual Picoampere Input

Current Bipolar Op Amp

AD706

FEATURES

CONNECTION DIAGRAM

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

and Surface-Mount (SOIC) Packages

Available in Tape and Reel in Accordance with

EIA-481A Standard

Plastic Mini-DIP (N) and

Plastic SOIC (R) Packages

AMPLIFIER 1

AMPLIFIER 2

AD706

OUTPUT

–IN

Vꢂ

OUTPUT

–IN

ꢂIN

V–

ꢂIN

Quad Version: AD704

TOP VIEW

APPLICATIONS

Low Frequency Active Filters

Precision Instrumentation

Precision Integrators

GENERAL DESCRIPTION

PRODUCT HIGHLIGHTS

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_Bdrift over temperature. It utilizes superbeta

bipolar input transistors to achieve picoampere input bias current

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

while its I_Btypically only increases by 5ϫ at 125°C (unlike a

JFET amp, for which I_Bdoubles every 10°C for a 1000ϫ

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

offset voltage and low noise characteristics of a precision bipolar

input amplifier.

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

level input bias currents, yet has the low I_Bdrift of a bipolar

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

such as the LT1024.

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

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

amplifier would normally be required but without the

chopper’s inherent noise.

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.

100

TYPICAL JFET AMP

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.

0.1

AD706

0.01

–55

+25

+110

+125

TEMPERATURE – ꢁC

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

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

Figure 1. Input Bias Current vs. Temperature

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, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat

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.

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

Tel: 781/329-4700

Fax: 781/326-8703

www.analog.com

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