Product details


Number of channels (#) 2 Total supply voltage (Min) (+5V=5, +/-5V=10) 4.5 Total supply voltage (Max) (+5V=5, +/-5V=10) 36 GBW (Typ) (MHz) 10 Slew rate (Typ) (V/us) 8 Rail-to-rail In to V-, Out Vos (offset voltage @ 25 C) (Max) (mV) 1.5 Iq per channel (Typ) (mA) 1.6 Vn at 1 kHz (Typ) (nV/rtHz) 8 Features Burr-Brown™ Audio, EMI Hardened, High Cload Drive, Small Size THD + N @ 1 kHz (Typ) (%) 0.00005 Rating Catalog Operating temperature range (C) -40 to 85 Output current (Typ) (mA) 75 Architecture CMOS CMRR (Typ) (dB) 120 Input bias current (Max) (pA) 20 open-in-new Find other Audio op amps

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 WSON (DRG) 8 9 mm² 3 x 3 open-in-new Find other Audio op amps


  • THD+N, 50 mW, 32 Ω, 1 kHz, –109 dB
  • Wide Supply Range:
    • 4.5 V to 36 V, ±2.25 V to ±18 V
  • Low Offset Voltage: ±0.25 mV
  • Low Offset Drift: ±0.5 µV/°C
  • Gain Bandwidth: 10 MHz
  • Low Input Bias Current: ±10 pA
  • Low Quiescent Current: 1.6 mA per Amplifier
  • Low Noise: 8 nV/√Hz
  • EMI- and RFI-Filtered Inputs
  • Input Range Includes Negative Supply
  • Input Range Operates to Positive Supply
  • Rail-to-Rail Output
  • High Common-Mode Rejection: 120 dB
  • Industry-Standard Packages:
    • SOIC-8 and SOIC-14
  • microPackages:
    • Dual in WSON-8, Quad in VQFN-16
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The OPA1688 and OPA1689 are a family of SoundPlus™ 36-V, single-supply, low-noise operational amplifiers capable of operating on supplies ranging from 4.5 V (±2.25 V) to 36 V (±18 V). This latest addition of high-voltage audio operational amplifiers, in conjunction with the OPA16xx devices provide a family of bandwidth, noise, and power options to meet the needs of a wide variety of applications. The OPA168x are available in micropackages, and offer low offset, drift, and quiescent current. These devices also offer wide bandwidth, fast slew rate, and high output current drive capability. The dual and quad versions all have identical specifications for maximum design flexibility.

Unlike most op amps that are specified at only one supply voltage, the OPA168x family is specified from 4.5 V to 36 V. Input signals beyond the supply rails do not cause phase reversal. The input can operate 100 mV below the negative rail and within 2 V of the top rail during normal operation. Note that these devices can operate with full rail-to-rail input 100 mV beyond the top rail, but with reduced performance within 2 V of the top rail.

The OPA168x series of op amps are specified from –40°C to 85°C.

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Drop-in replacement with upgraded functionality to the compared device.
OPA1656 ACTIVE SoundPlus™ ultra-low noise and distortion, Burr-Brown™ audio operational amplifier Pin-to-pin device with higher output drive (100 mA), higher bandwidth (53 MHz) and lower noise (4.3 nV/vHz).
OPA1678 ACTIVE Low distortion (-120 dB), low noise (4.5nV/rtHz), dual audio op amp This product is a lower priced pin-to-pin audio op amp.

Technical documentation

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 OPA1688EVM is a hardware platform for evaluating the performance of the OPA1688 audio operational amplifier. On the EVM, each channel of the OPA1688 is configured as a difference amplifier that receives a differential input signal from an audio analyzer or audio DAC and outputs a single-ended (...)
  • Eases design by providing a quick and simple way to evaluate the OPA1688
  • Audio jack provided on the EVM allows for quick listening tests of the OPA1688
  • Input connectors on the EVM provide an easy way to evaluate the OPA1688 using an audio analyzer or an audio DAC that will be used in an end product

Design tools & simulation

SBOM950C.ZIP (15 KB) - PSpice Model
SBOM951C.ZIP (10 KB) - TINA-TI Spice Model
SBOM952C.TSC (316 KB) - TINA-TI Reference Design
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
  • (...)

Reference designs

Headphone Amplifier for Voltage-Output Audio DACs Reference Design
TIPD189 This reference design details a high-fidelity headphone amplifier circuit suitable for portable applications, such as smartphones and tablets. It uses an operational amplifier (op amp) with low power consumption and a very small package to convert a differential output voltage to a single-ended (...)
document-generic Schematic
Design files

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
SON (DRG) 8 View options

Ordering & quality

Information included:
  • RoHS
  • 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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