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OPA1688

ACTIVE

36V, 10MHz, Low Distortion High Drive Rail-to-Rail Output Audio Operational Amplifiers

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Data sheet

OPA1688

ACTIVE
Data sheet Order now

Product details

Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.5 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 GBW (typ) (MHz) 10 Slew rate (typ) (V/µs) 8 Rail-to-rail In to V-, Out Vos (offset voltage at 25°C) (max) (mV) 1.5 Iq per channel (typ) (mA) 1.6 Vn at 1 kHz (typ) (nV√Hz) 8 Features Burr-Brown™ Audio, EMI Hardened, High Cload Drive, Premium Sound, Small Size THD + N at 1 kHz (typ) (%) 0.00005 Rating Catalog Operating temperature range (°C) -40 to 85 Iout (typ) (A) 0.075 Product type Essential Architecture CMOS CMRR (typ) (dB) 120 Input bias current (max) (pA) 20
Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.5 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 GBW (typ) (MHz) 10 Slew rate (typ) (V/µs) 8 Rail-to-rail In to V-, Out Vos (offset voltage at 25°C) (max) (mV) 1.5 Iq per channel (typ) (mA) 1.6 Vn at 1 kHz (typ) (nV√Hz) 8 Features Burr-Brown™ Audio, EMI Hardened, High Cload Drive, Premium Sound, Small Size THD + N at 1 kHz (typ) (%) 0.00005 Rating Catalog Operating temperature range (°C) -40 to 85 Iout (typ) (A) 0.075 Product type Essential Architecture CMOS CMRR (typ) (dB) 120 Input bias current (max) (pA) 20
SOIC (D) 8 29.4 mm² 4.9 x 6 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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* Data sheet OPA1688 36-V, Single-Supply, 10-MHz, Rail-to-Rail Output, SoundPlus™ Audio Operational Amplifier datasheet (Rev. A) PDF | HTML 20 Jun 2022
Application brief Understanding Op Amp Noise in Audio Circuits PDF | HTML 14 Jun 2021
Application note HiFi Audio Circuit Design 23 Aug 2017
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
E-book Analog Engineer’s Pocket Reference Guide Fifth Edition (Rev. D) PDF | HTML 30 Sep 2014
Application note Compensate Transimpedance Amplifiers Intuitively (Rev. A) 30 Mar 2005

Design & development

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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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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 (...)
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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 (...)
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SOIC (D) 8 Ultra Librarian
WSON (DRG) 8 Ultra Librarian
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