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 Product type Essential Architecture CMOS CMRR (Typ) (dB) 120 Input bias current (Max) (pA) 20
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 Product type Essential Architecture CMOS CMRR (Typ) (dB) 120 Input bias current (Max) (pA) 20
SOIC (D) 8 19 mm² 4.9 x 3.9 WSON (DRG) 8 9 mm² 3 x 3
  • 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
  • Packages:
    • Industry-standard SOIC-8
    • micro WSON-8
  • 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
  • Packages:
    • Industry-standard SOIC-8
    • micro WSON-8

The OPA1688 36-V, single-supply, low-noise SoundPlus™ audio operational amplifier is capable of operating on supplies ranging from 4.5 V (±2.25 V) to 36 V (±18 V). This latest addition of a high-voltage audio operational amplifier 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 OPA1688 is available in a WSON micropackage, and offers low offset, drift, and quiescent current. This device also offers wide bandwidth, fast slew rate, and high output current drive capability.

Unlike most op amps that are specified at only one supply voltage, the OPA1688 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 this device 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 OPA1688 is specified from –40°C to +85°C.

The OPA1688 36-V, single-supply, low-noise SoundPlus™ audio operational amplifier is capable of operating on supplies ranging from 4.5 V (±2.25 V) to 36 V (±18 V). This latest addition of a high-voltage audio operational amplifier 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 OPA1688 is available in a WSON micropackage, and offers low offset, drift, and quiescent current. This device also offers wide bandwidth, fast slew rate, and high output current drive capability.

Unlike most op amps that are specified at only one supply voltage, the OPA1688 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 this device 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 OPA1688 is specified from –40°C to +85°C.

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Design & development

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

Evaluation board

OPA1688EVM — OPA1688 SoundPlus Audio Operational Amplifier Evaluation Module

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 (...)
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Simulation model

OPA168x PSpice Model (Rev. E)

SBOM950E.ZIP (30 KB) - PSpice Model
Simulation model

OPA168x TINA-TI Spice Model (Rev. D)

SBOM951D.ZIP (11 KB) - TINA-TI Spice Model
Simulation model

OPA168x TINA-TI Reference Design (Rev. D)

SBOM952D.TSC (324 KB) - TINA-TI Reference Design
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

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 (...)
User guide: PDF
Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

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 (...)
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Reference designs

TIPD189 — Headphone Amplifier for Voltage-Output Audio DACs Reference Design

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 (...)
Schematic: PDF
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SOIC (D) 8 View options
SON (DRG) 8 View options

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