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• A newer version of this device is now available: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.