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FEATURES

FET INPUT: IB = 5pA

LOW OFFSET VOLTAGE: 1.5mV

WIDE SUPPLY RANGE: ±2.25V to ±18V

LOW QUIESCENT CURRENT: 220mA/channel

EXCELLENT SPEED/POWER: 1MHz

INPUT TO POSITIVE SUPPLY

MicroSIZE PACKAGES: SOT-23-5, MSOP-8

SINGLE, DUAL, AND QUAD

APPLICATIONS

STRAIN GAGE AMPLIFIER

PHOTODETECTOR AMPLIFIER

PRECISION INTEGRATOR

BATTERY-POWERED INSTRUMENTS

TEST EQUIPMENT

ACTIVE FILTERS

DESCRIPTION

OPA137 series FET-input operational amplifiers are designed

for low cost and miniature applications. In addition to small

size (SOT-23-5 and MSOP-8 packages), they provide low

input bias current (5pA), low quiescent currrent (220mA/

channel), and high open-loop gain (94dB).

Either single (+4.5V to +36V) or dual (±2.25 to ±18V)

supplies can be used. The input common-mode voltage range

includes the positive supply—suitable for many single-supply

applications. Single, dual, and quad versions have identical

specifications for maximum design flexibility.

OPA137 op amps are easy to use and free from phase

inversion and overload problems found in some FET-input

amplifiers. High performance, including linearity, is maintained

as the amplifiers swing to their specified limits. In

addition, the combination of high slew rate (3.5V/ms) and

wide bandwidth (1MHz) provide fast settling time assuring

good dynamic response. Dual and quad designs feature completely

independent circuitry for lowest crosstalk and freedom

from interaction.

The single (OPA137) packages are the tiny 5-lead SOT-23-5

surface mount, SO-8 surface mount, and 8-pin DIP. The dual

(OPA2137) comes in the miniature MSOP-8 surface mount,

SO-8 surface mount, and 8-pin DIP packages. The quad

(OPA4137) packages are the SO-14 surface mount and the

14-pin DIP. All are specified from –40°C to +85°C and operate

from –55°C to +125°C. A SPICE macromodel is available for

design analysis.