AD627A AD [Analog Devices], AD627A Datasheet

AD627A

Manufacturer Part Number

AD627A

Description

Micropower, Single and Dual Supply Rail-to-Rail Instrumentation Amplifier

Manufacturer

AD [Analog Devices]

Datasheet

1.AD627A.pdf (16 pages)

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PRODUCT DESCRIPTION

The AD627 is an integrated, micropower, instrumentation

amplifier that delivers rail-to-rail output swing on single and

dual (+2.2 V to 18 V) supplies. The AD627 provides the user

with excellent ac and dc specifications while operating at only

85 A max.

The AD627 offers superior user flexibility by allowing the user

to set the gain of the device with a single external resistor, and

by conforming to the 8-lead industry standard pinout configura-

tion. With no external resistor, the AD627 is configured for a

gain of 5. With an external resistor, it can be programmed for

gains of up to 1000.

REV. A

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

Micropower, 85 A Max Supply Current

Wide Power Supply Range (+2.2 V to

Easy to Use

Higher Performance than Discrete Designs

Rail-to-Rail Output Swing

High Accuracy DC Performance

Noise: 38 nV/ Hz RTI Noise @ 1 kHz (G = 100)

Excellent AC Specifications

APPLICATIONS

4 mA-to-20 mA Loop Powered Applications

Low Power Medical Instrumentation—ECG, EEG

Transducer Interfacing

Thermocouple Amplifiers

Industrial Process Controls

Low Power Data Acquisition

Portable Battery Powered Instruments

Gain Set with One External Resistor

Gain Range 5 (No Resistor) to 1,000

0.10% Gain Accuracy (G = 5) (AD627A)

10 ppm Gain Drift (G = 5)

125 V Max Input Offset Voltage (AD627B)

200 V Max Input Offset Voltage (AD627A)

1 V/ C Max Input Offset Voltage Drift (AD627B)

3 V/ C Max Input Offset Voltage Drift (AD627A)

10 nA Max Input Bias Current

77 dB Min CMRR (G = 5) (AD627A)

83 dB Min CMRR (G = 5) (AD627B)

80 kHz Bandwidth (G = 5)

135 s Settling Time to 0.01% (G = 5, 5 V Step)

18 V)

Rail-to-Rail Instrumentation Amplifier

Micropower, Single and Dual Supply

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

Tel: 781/329-4700

Fax: 781/326-8703

Wide supply voltage range (+2.2 V to 18 V), and micropower

current consumption make the AD627 a perfect fit for a wide

range of applications. Single supply operation, low power con-

sumption and rail-to-rail output swing make the AD627 ideal

for battery powered applications. Its rail-to-rail output stage

maximizes dynamic range when operating from low supply

voltages. Dual supply operation ( 15 V) and low power con-

sumption make the AD627 ideal for industrial applications,

including 4 mA-to-20 mA loop-powered systems.

The AD627 does not compromise performance, unlike other

micropower instrumentation amplifiers. Low voltage offset,

offset drift, gain error, and gain drift keep dc errors to a mini-

mum in the users system. The AD627 also holds errors over

frequency to a minimum by providing excellent CMRR over

frequency. Line noise, as well as line harmonics, will be rejected,

since the CMRR remains high up to 200 Hz.

The AD627 provides superior performance, uses less circuit

board area and does it for a lower cost than micropower discrete

designs.

Figure 1. CMRR vs. Frequency, 5 V

100

8-Lead Plastic DIP (N) and SOIC (R)

FUNCTIONAL BLOCK DIAGRAM

DISCRETE DESIGN

–V

–IN

+IN

TRADITIONAL

LOW POWER

World Wide Web Site: http://www.analog.com

FREQUENCY – Hz

AD627

100

OUTPUT

REF

AD627

, Gain = 5

AD627

10k

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