AD820ARZREEL7 Analog Devices, AD820ARZREEL7 Datasheet

AD820ARZREEL7

Manufacturer Part Number

AD820ARZREEL7

Description

SOP8

Manufacturer

Analog Devices

Datasheet

1.AD820ARZREEL7.pdf (16 pages)

Specifications of AD820ARZREEL7

Date_code

07+

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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.

PRODUCT DESCRIPTION

The AD820 is a precision, low power FET input op amp that

can operate from a single supply of 5.0 V to 36 V, or dual sup-

plies of ± 2.5 V to ± 18 V. It has true single supply capability

with an input voltage range extending below the negative rail,

REV. D

FEATURES

True Single Supply Operation

Excellent Load Drive

Excellent AC Performance for Low Power

Excellent DC Performance

Low Noise

APPLICATIONS

Battery-Powered Precision Instrumentation

Photodiode Preamps

Active Filters

12- to 14-Bit Data Acquisition Systems

Medical Instrumentation

Low Power References and Regulators

Figure 1. Typical Distribution of Input Bias Current

Output Swings Rail-to-Rail

Input Voltage Range Extends Below Ground

Single Supply Capability from 5 V to 36 V

Dual Supply Capability from

Capacitive Load Drive Up to 350 pF

Minimum Output Current of 15 mA

800 A Max Quiescent Current

Unity Gain Bandwidth: 1.8 MHz

Slew Rate of 3.0 V/ s

800 V Max Input Offset Voltage

1 V/ C Typ Offset Voltage Drift

25 pA Max Input Bias Current

13 nV/√Hz @ 10 kHz

INPUT BIAS CURRENT – pA

2.5 V to

18 V

allowing the AD820 to accommodate input signals below ground

in the single supply mode. Output voltage swing extends to within

10 mV of each rail providing the maximum output dynamic range.

Offset voltage of 800 µV max, offset voltage drift of 1 µV/°C,

typical input bias currents below 25 pA and low input voltage noise

provide dc precision with source impedances up to a Gigaohm.

1.8 MHz unity gain bandwidth, –93 dB THD at 10 kHz and

3 V/µs slew rate are provided for a low supply current of 800 µA.

The AD820 drives up to 350 pF of direct capacitive load and

provides a minimum output current of 15 mA. This allows the

amplifier to handle a wide range of load conditions. This combi-

nation of ac and dc performance, plus the outstanding load drive

capability, results in an exceptionally versatile amplifier for the

single supply user.

The AD820 is available in two performance grades. The A and

B grades are rated over the industrial temperature range of

–40°C to +85°C.

The AD820 is offered in two varieties of 8-lead package: plastic

DIP, and surface mount (SOIC).

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

Tel: 781/329-4700

Fax: 781/326-8703

NULL

–V

+IN

–IN

Low Power FET-Input Op Amp

Figure 2. Gain of 2 Amplifier; V

(Not to Scale)

TOP VIEW

AD820

= 2.5V Sine Centered at 1.25 Volts

Single Supply, Rail to Rail

FUNCTIONAL BLOCK DIAGRAM

NULL

NC = NO CONNECT

OUT

–V

–IN

+IN

(Not to Scale)

= 5, 0,

TOP VIEW

AD820

www.analog.com

OUT

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