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OPA1632

ACTIVE

Fully Differential I/O Audio Amplifier

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Data sheet

OPA1632

ACTIVE
Data sheet Order now

Product details

Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 5 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 30 GBW (typ) (MHz) 180 Slew rate (typ) (V/µs) 50 Rail-to-rail No Vos (offset voltage at 25°C) (max) (mV) 3 Iq per channel (typ) (mA) 13 Vn at 1 kHz (typ) (nV√Hz) 1.3 Features Burr-Brown™ Audio, Shutdown THD + N at 1 kHz (typ) (%) 0.000022 Rating Catalog Operating temperature range (°C) -40 to 85 Iout (typ) (A) 0.085 Architecture Voltage FB CMRR (typ) (dB) 90 Input bias current (max) (pA) 140000
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 5 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 30 GBW (typ) (MHz) 180 Slew rate (typ) (V/µs) 50 Rail-to-rail No Vos (offset voltage at 25°C) (max) (mV) 3 Iq per channel (typ) (mA) 13 Vn at 1 kHz (typ) (nV√Hz) 1.3 Features Burr-Brown™ Audio, Shutdown THD + N at 1 kHz (typ) (%) 0.000022 Rating Catalog Operating temperature range (°C) -40 to 85 Iout (typ) (A) 0.085 Architecture Voltage FB CMRR (typ) (dB) 90 Input bias current (max) (pA) 140000
HVSSOP (DGN) 8 14.7 mm² 3 x 4.9 SOIC (D) 8 29.4 mm² 4.9 x 6
  • Excellent sound quality
  • Ultra low distortion: 0.000028%
  • Low noise: 1.25 nV/√Hz
  • High speed:
    • Slew rate: 72 V/µs
    • Gain bandwidth product: 180 MHz
  • Fully differential architecture:
    • Balanced input and output converts single-ended input to balanced differential output
  • Wide supply range: ±2.5 V to ±15 V
  • Shutdown current: 0.85 mA (V S = ± 5 V)
  • Temperature range: –40°C to +85°C
  • Excellent sound quality
  • Ultra low distortion: 0.000028%
  • Low noise: 1.25 nV/√Hz
  • High speed:
    • Slew rate: 72 V/µs
    • Gain bandwidth product: 180 MHz
  • Fully differential architecture:
    • Balanced input and output converts single-ended input to balanced differential output
  • Wide supply range: ±2.5 V to ±15 V
  • Shutdown current: 0.85 mA (V S = ± 5 V)
  • Temperature range: –40°C to +85°C

The OPA1632 is a fully differential amplifier (FDA) designed to drive high-performance audio analog-to-digital converters (ADCs) or as a predriver for class-D amplifiers.

The OPA1632 delivers excellent audio quality, very low noise, large output voltage swing, and high current drive. The OPA1632 has an excellent gain bandwidth of 180 MHz, and a very fast slew rate of 72 V/µs that helps to produce exceptionally low distortion. A very low input voltage noise of 1.25 nV/√Hz further provides maximum signal-to-noise ratio and dynamic range.

The flexibility of the fully differential architecture allows for easy implementation of a single-ended to fully differential output conversion. Differential output reduces even-order harmonics and minimizes common-mode noise interference. The OPA1632 provides excellent performance when used to drive high-performance audio ADCs such as the PCM1804. A shutdown feature is included to save power when the device is not in use.

The OPA1632 is characterized to operate from –40°C to +85°C and is available in an SO-8 package and a thermally-enhanced HVSSOP-8 PowerPAD™ integrated circuit package.

The OPA1632 is a fully differential amplifier (FDA) designed to drive high-performance audio analog-to-digital converters (ADCs) or as a predriver for class-D amplifiers.

The OPA1632 delivers excellent audio quality, very low noise, large output voltage swing, and high current drive. The OPA1632 has an excellent gain bandwidth of 180 MHz, and a very fast slew rate of 72 V/µs that helps to produce exceptionally low distortion. A very low input voltage noise of 1.25 nV/√Hz further provides maximum signal-to-noise ratio and dynamic range.

The flexibility of the fully differential architecture allows for easy implementation of a single-ended to fully differential output conversion. Differential output reduces even-order harmonics and minimizes common-mode noise interference. The OPA1632 provides excellent performance when used to drive high-performance audio ADCs such as the PCM1804. A shutdown feature is included to save power when the device is not in use.

The OPA1632 is characterized to operate from –40°C to +85°C and is available in an SO-8 package and a thermally-enhanced HVSSOP-8 PowerPAD™ integrated circuit package.
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Technical documentation

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Type Title Date
* Data sheet OPA1632 High-Performance, Fully Differential Audio Op Amp datasheet (Rev. E) 21 Aug 2023
Application note Understanding Op Amp Noise in Audio Circuits PDF | HTML 14 Jun 2021
Application note Optimizing Noise and Power with Super Beta-Fully Differential Amplifiers PDF | HTML 07 Dec 2020
Technical article No headroom, no problem: buffering and filtering an audio signal chain in low-voltage systems 11 Apr 2019
Analog Design Journal Q3 2009 Issue Analog Applications Journal 24 Sep 2018
Design guide TIDA-01359 Audio-OPA1632EVM Audio Interface Board Design Guide 13 Apr 2018
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Application note Fully-Differential Amplifiers (Rev. E) 19 Sep 2016
Technical article Amp up your cans: Is your op amp stable? (Part 2) 22 Jan 2016
Technical article Stress-induced outbursts: Microphonics in ceramic capacitors (Part 2) 23 Dec 2014
Technical article Stress-induced outbursts: Microphonics in ceramic capacitors (Part 1) 19 Dec 2014
Analog Design Journal Using infinite-gain, MFB filter topology in fully differential active filters 14 Jul 2009
Application note Compensate Transimpedance Amplifiers Intuitively (Rev. A) 30 Mar 2005
Analog Design Journal Analysis of fully differential amplifiers 11 Mar 2005
Analog Design Journal Designing for low distortion with high-speed op amps 02 Mar 2005
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005

Design & development

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

Simulation model

OPA1632 PSpice Model (Rev. C)

SBOC064C.ZIP (2 KB) - PSpice Model
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Simulation model

OPA1632 TINA-TI Reference Design (Rev. D)

SBOC100D.TSC (270 KB) - TINA-TI Reference Design
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Simulation model

OPA1632 TINA-TI Spice Model (Rev. C)

SBOM182C.ZIP (6 KB) - TINA-TI Spice Model
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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 operational-amplifier (...)
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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 (...)
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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
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Reference designs

TIDA-01359 — Analog Audio Amplifier Front-end Reference Design with Improved Noise and Distortion

The Analog Audio Amplifier Front-end Reference Design demonstrates how to build an audio front end for the TPA32xx class-D amplifier. The AUDIO-OPA1632EVM is the board that was designed to test the results of this design. Design files for the board are available in the reference design product (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP10710 — Public Announcement Audio Reference Design utilizing best in class Boost Controller

PMP10710 is a 200W design for public announcement audio system which can be used in 100W +100W Stereo or 200W Woofer Applications. The design is broadly divided into four main stages:
  1. Single-Phase Synchronous Boost Converter using the LM5122 controller IC.  The design accepts an input voltage (...)
Test report: PDF
Schematic: PDF
Reference designs

TIDA-RESOLVER-APPLICATIONS-REFERENCE-DESIGN — Motherboard/controller for the AMC1210

This is a reference design for resolver applications and part of a modular system for evaluating our delta-sigma modulators. The software included allows use of the AMC1210 in a variety of configurations for resolver and current-shunt applications and features a data-export utility to support data (...)
Test report: PDF
Schematic: PDF
Package Pins Download
HVSSOP (DGN) 8 View options
SOIC (D) 8 View options
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