Product details


Number of channels (#) 4 Total supply voltage (Min) (+5V=5, +/-5V=10) 4.5 Total supply voltage (Max) (+5V=5, +/-5V=10) 36 GBW (Typ) (MHz) 16 Slew rate (Typ) (V/us) 9 Rail-to-rail Out Vos (offset voltage @ 25 C) (Max) (mV) 2 Iq per channel (Typ) (mA) 2 Vn at 1 kHz (Typ) (nV/rtHz) 4.5 Features THD + N @ 1 kHz (Typ) (%) 0.0001 Rating Catalog Operating temperature range (C) -40 to 85 Output current (Typ) (mA) 50 Architecture FET CMRR (Typ) (dB) 110 open-in-new Find other Audio op amps

Package | Pins | Size

SOIC (D) 14 52 mm² 8.65 x 6 TSSOP (PW) 14 32 mm² 5 x 6.4 WQFN (RUM) 16 16 mm² 4 x 4 open-in-new Find other Audio op amps


  • Low noise: 4.5 nV/√Hz at 1 kHz
  • Low distortion: 0.0001% at 1 kHz
  • High open-loop gain: 114 dB
  • High common-mode rejection: 110 dB
  • Low quiescent current:
    • 2 mA per channel
  • Low input bias current: 10 pA (typical)
  • Slew rate: 9 V/µs
  • Wide gain bandwidth: 16 MHz (G = 1)
  • Unity-gain stable
  • Rail-to-rail output
  • Wide supply range:
    • ±2.25 V to ±18 V, or 4.5 V to 36 V
  • Dual-channel and quad-channel versions
  • Small package sizes:
    • Dual-channel: SO-8, MSOP-8, SON-8
    • Quad-channel: SO-14, TSSOP-14, QFN-16

All trademarks are the property of their respective owners.

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The OPA1678 (dual-channel) and OPA1679 (quad-channel) operational amplifiers offer higher system-level performance over legacy op amps commonly used in audio circuitry. The OPA167x amplifiers achieve a low 4.5-nV/√Hz noise density and low distortion of 0.0001% at 1 kHz, which improves audio signal fidelity. They also offer rail-to-rail output swing to within 800 mV with a 2-kΩ load, which increases headroom and maximizes dynamic range.

The OPA1678 and OPA1679 operate over a very wide supply range of ±2.25 V to ±18 V or (4.5 V to 36 V) on only 2 mA of supply current to accommodate the power supply constraints of many types of audio products. These op amps are unity-gain stable and have excellent dynamic behavior over a wide range of load conditions allowing them to be used in many audio circuits.

The OPA167x amplifiers use completely independent internal circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded.

The OPA167x temperature ranges are specified from –40°C to +85°C.


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Technical documentation

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Type Title Date
* Data sheet OPA167x Low-Distortion Audio Operational Amplifiers datasheet (Rev. C) Jun. 24, 2019
Technical article No headroom, no problem: buffering and filtering an audio signal chain in low-voltage systems Apr. 11, 2019
User guide Using the QFN16-DIP-EVM evaluation module Feb. 20, 2019
Application note Phantom Power with Operational Amplifiers (Rev. A) Nov. 09, 2018
E-book The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
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 QFN16-DIP-EVM provides a fast and easy platform for prototyping TI's RUM16 package parts. This tool is targeted especially for TI's Quad OpAmps, but may be used with any device with the same footprint. Scoring allows each device to be separated into individual circuit boards. With included (...)
  • Low cost
  • Flexible design allows use with any pinout
  • Protoype up to 8 devices with one EVM
  • Compatible with common solderless breadboards

Design tools & simulation

SBOMAC3C.ZIP (18 KB) - PSpice Model
SBOMAC4C.TSC (292 KB) - TINA-TI Spice Model
SBOMAC5C.ZIP (11 KB) - TINA-TI Spice 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
SOIC (D) 14 View options
TSSOP (PW) 14 View options
WQFN (RUM) 16 View options

Ordering & quality

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  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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