1 Features

1• Wide Supply Range:

+4.5 V to +36 V, ±2.25 V to ±18 V

• Low Offset Voltage: ±0.2 mV

• Low Offset Drift: ±0.3 μV/°C

• Gain Bandwidth: 10 MHz

• Low Input Bias Current: ±8 pA

• Low Quiescent Current: 1.6 mA per Amplifier

• Low Noise: 7 nV/√Hz

• EMI and RFI Filtered Inputs

• Input Range Includes the Negative Supply

• Input Range Operates to Positive Supply

• Rail-to-Rail Output

• High Common-Mode Rejection: 120 dB

• Industry-Standard Packages:

– SOIC-8, VSSOP-8, SOIC-14, TSSOP-14

• microPackages: Single in SC70, SOT-23,

Dual in WSON-8

2 Applications

• Tracking Amplifier in Power Modules

• Merchant Power Supplies

• Transducer Amplifiers

• Bridge Amplifiers

• Temperature Measurements

• Strain Gauge Amplifiers

• Precision Integrators

• Test Equipment

3 Description

The OPA172, OPA2172 and OPA4172 (OPAx172)

are a family of 36-V, single-supply, low-noise

operational amplifiers capable of operating on

supplies ranging from +4.5 V (±2.25 V) to +36 V

(±18 V). This latest addition of high-voltage CMOS

operational amplifiers, in conjunction with the

OPAx171 and OPAx170, provide a family of

bandwidth, noise, and power options to meet the

needs of a wide variety of applications. The OPAx172

are available in micropackages, and offer low offset,

drift, and quiescent current. These devices also offer

wide bandwidth, fast slew rate, and high output

current drive capability. The single, dual, and quad

versions all have identical specifications for maximum

design flexibility.

Unlike most op amps, which are specified at only one

supply voltage, the OPAx172 family is specified from

+4.5 V to +36 V. Input signals beyond the supply rails

do not cause phase reversal. The input can operate

100 mV below the negative rail and within 2 V of the

top rail during normal operation. Note that these

devices can operate with full rail-to-rail input 100 mV

beyond the top rail, but with reduced performance

within 2 V of the top rail.

The OPAx172 series of op amps are specified from

–40°C to +125°C.