Product details


Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 3 Total supply voltage (Max) (+5V=5, +/-5V=10) 36 GBW (Typ) (MHz) 9.2 Slew rate (Typ) (V/us) 15 Rail-to-rail No Vos (offset voltage @ 25 C) (Max) (mV) 0.2 Iq per channel (Typ) (mA) 0.95 Vn at 1 kHz (Typ) (nV/rtHz) 3.7 Features Burr-Brown™ Audio, Premium Sound THD + N @ 1 kHz (Typ) (%) 0.0001 Rating Catalog Operating temperature range (C) -40 to 125 Output current (Typ) (mA) 31 Architecture Bipolar CMRR (Typ) (dB) 140 Input bias current (Max) (pA) 2000 open-in-new Find other Audio op amps

Package | Pins | Size

VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Audio op amps


  • Low input voltage noise: 3.7 nV/√Hz at 1 kHz
  • Low THD + N: –120 dB at 1 kHz
  • Low supply current: 950 µA at ±18 V
  • Input offset voltage: ±200 µV (maximum)
  • Input bias current: 2 nA (maximum)
  • Low bias current noise: 400 fA/√Hz at 10 Hz
  • Gain-bandwidth product: 9.2 MHz
  • Differential output slew rate: 15 V/µs
  • Wide input and output common-mode range
  • Wide single-supply operating range: 3 V to 36 V
  • Low supply current power-down feature: < 20 µA
  • Overload power limit
  • Current limit
  • Package: 8-pin VSSOP
  • Temperature range: –40°C to +125°C

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The OPA1637 is a low-noise, low total harmonic distortion (THD), fully differential, Burr-Brown™ Audio operational amplifier that easily filters and drives fully differential, audio signal chains.

The OPA1637 also converts single-ended sources to differential outputs required by high-fidelity analog-to-digital converters (ADCs). Designed for exceptional low noise and THD, the bipolar super-beta inputs yield a very low noise figure at very-low quiescent current and input bias current. This device is designed for audio circuits where low power consumption is required along with excellent signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR).

The OPA1637 features high-voltage supply capability, allowing for supply voltages up to ±18 V. This capability allows high-voltage differential signal chains to benefit from the improved headroom and dynamic range without adding separate amplifiers for each polarity of the differential signal. Very-low voltage and current noise enables the OPA1637 for use in high-gain configurations with minimal impact to the audio signal noise.

The OPA1637 is characterized for operation over the wide temperature range of –40°C to +125°C, and is available in an 8-pin VSSOP package.

open-in-new Find other Audio op amps
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NEW THP210 ACTIVE High precision (40-μV, 0.1μV/C), high-voltage (36-V), low-noise (3.7-nV/√Hz), fully-differential amp High-precision, high-voltage (40-µV, 0.35-µV/√Hz) fully differential amplifier

Technical documentation

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Type Title Date
* Datasheet OPA1637 High-Fidelity, Low-Noise, Fully-Differential, Burr-Brown™ Audio Op Amp datasheet (Rev. B) Aug. 18, 2020
Application note Optimizing Noise and Power with Super Beta-Fully Differential Amplifiers Dec. 07, 2020
More literature OPA1637EVM EU Declaration of Conformity (DoC) Jun. 25, 2020
User guide OPA1637 Evaluation Module User's Guide (Rev. A) Jun. 10, 2020
Technical article No headroom, no problem: buffering and filtering an audio signal chain in low-voltage systems Apr. 11, 2019
Technical article Amp up your cans: Is your op amp stable? (Part 2) Jan. 22, 2016
Technical article Stress-induced outbursts: Microphonics in ceramic capacitors (Part 2) Dec. 23, 2014
Technical article Stress-induced outbursts: Microphonics in ceramic capacitors (Part 1) Dec. 19, 2014
Application note Compensate Transimpedance Amplifiers Intuitively (Rev. A) Mar. 30, 2005

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide
The OPA1637 is a high-performance, low-noise, low total harmonic distortion (THD), fully differential amplifier that can easily filter and drive fully differential audio signal chains from Texas Instruments. The OPA1637EVM is designed to provide access to the features and measure the performance of (...)
  • Eases design by providing a quick and simple way to evaluate the OPA1637
  • SMA Connectors and test points provided on the EVM allows for quick tests of the OPA1637
  • XLR Audio connectors on the EVM provide an easy way to evaluate the OPA1637 using an audio analyzer
  • The OPA1637EVM is configured by default (...)

Design tools & simulation

SBOMB86.ZIP (14 KB) - TINA-TI Spice Model
SBOMB87.TSC (164 KB) - TINA-TI Reference Design
SBOMBF8.ZIP (26 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
Analog engineer's calculator
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)

CAD/CAE symbols

Package Pins Download
VSSOP (DGK) 8 View options

Ordering & quality

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Support & training

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