1 Features

• A newer version of this device is now available:

OPA2156

• FET input: IB = 50pA Maximum

• Wide bandwidth: 8MHz

• High slew rate: 20V/μs

• Low noise: 8nV/√Hz (1kHz)

• Low distortion: 0.00008%

• High open-loop gain: 126dB (2kΩ load)

• Wide supply range: ±2.5V to ±18V

• Low offset voltage: 500μV maximum

• Single, dual, and quad versions

2 Applications

• SAR ADC driver

• Voltage reference buffer

• Trans-impedance amplifier

• Photodiode amplifier

• Active filter

• Integrator

3 Description

The OPA132, OPA2132, and OPA4132 (OPAx132)

series of FET-input operational amplifiers provides

high speed and excellent dc performance. The

combination of high slew rate and wide bandwidth

provide fast settling time. The single, dual,

and quad versions have identical specifications

for maximum design flexibility. High-performance

grades are available in the single and dual

versions. All are an excellent choice for generalpurpose,

audio, data-acquisition, and communications

applications, especially where high source impedance

is encountered.

The OPAx132 operational amplifiers are easy to use

and free from phase inversion and overload problems

often found in common FET-input operational

amplifiers. Input cascode circuitry provides excellent

common-mode rejection and maintains low input

bias current over the wide input voltage range. The

OPAx132 series of operational amplifiers are stable

in unity gain and provide excellent dynamic behavior

over a wide range of load conditions, including high

load capacitance. Dual and quad versions feature

completely independent circuitry for lowest crosstalk

and freedom from interaction, even when overdriven

or overloaded.

The single version is available in 8-pin SOIC surface

mount package, the dual version is available in 8-pin

DIP and SOIC surface-mount packages. The quad

version is available in SOIC surface-mount packages.

All are specified for –40°C to +85°C operation.

The OPA2156 is a next-generation version, offering

lower broadband noise (3nV/√Hz), wider bandwidth

(25MHz), and rail-to-rail inputs.