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OPA2132

TIOPA2132

Texas Instruments
Dual precision audio/op amp with good linearity and low distortion for audio and signal-chain applications.
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Overview

The OPA2132 is a dual, high-speed JFET-input operational amplifier designed for precision audio and signal-chain applications. It combines low noise (8nV/rtHz) and low distortion with a high slew rate of 20V/us and an 8MHz bandwidth. The JFET input stage provides very low input bias current, making it ideal for high-impedance sensor interfaces.

Why Choose This Part

The OPA2132 offers a superior combination of high speed (20V/us) and low noise without the high power consumption of specialized video amps. Its wide supply range from +/-2.5V to +/-18V provides significant headroom for professional audio rails. Because it is unity-gain stable, it is easy to implement in standard voltage follower or buffer configurations.

Applications

High-Fidelity Audio Preamplifiers
Used in professional audio equipment to maintain signal integrity with ultra-low total harmonic distortion.
Photodiode Transimpedance Amplifiers
The low JFET input bias current makes it suitable for converting small currents from optical sensors into measurable voltages.
Precision Data Acquisition
Acts as a high-speed buffer or gain stage for ADCs in instrumentation where DC precision and AC performance are both required.
Active Filters
Excellent for high-order Butterworth or Linkwitz-Riley filters in audio crossovers due to its high bandwidth and stability.

Key Specifications

Slew Rate 20V/us
Mounting Type Surface Mount
Amplifier Type J-FET
Package / Case 8-SOIC (0.154", 3.90mm Width)
Current - Supply 4mA (x2 Channels)
Number of Circuits 2
Current - Input Bias 5 pA
Operating Temperature -40degC ~ 85degC (TA)
Gain Bandwidth Product 8 MHz
Voltage - Input Offset 500 uV
Supplier Device Package 8-SOIC
Current - Output / Channel 40 mA
Voltage - Supply Span (Max) 36 V
Voltage - Supply Span (Min) 5 V

Getting Started

Engineers typically prototype with the OPA2132P (PDIP-8) on a standard breadboard or the OPA2132U (SOIC-8) using an adapter PCB. Ensure high-frequency decoupling with 0.1uF ceramic capacitors placed as close as possible to the V+ and V- supply pins. Use a split-rail power supply to take full advantage of the device's wide dynamic range and input common-mode performance.

Also Consider

OPA2134 TITexas Instruments - A lower-cost alternative specifically optimized for audio applications with slightly different DC specifications.
TL072 TITexas Instruments - A classic, budget-friendly JFET op-amp for less demanding applications where higher noise and lower bandwidth are acceptable.
NE5532 TITexas Instruments - A standard bipolar audio op-amp that offers very low noise but has higher input bias current compared to the JFET-input OPA2132.

Categories

Analog ICs > Op-Amps