OPA1632

ACTIVE

Fully Differential I/O Audio Amplifier

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OPA1633 ACTIVE Ultra-low-distortion 195-MHz fully-differential audio amplifier Lower power (11 mA), lower noise (1.1 nV/rtHz) and wider supply (35 V)

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 mm × 4.9 mm) SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • 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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Top documentation Type Title Format options Date
* Data sheet OPA1632 High-Performance, Fully Differential Audio Op Amp datasheet (Rev. E) PDF | HTML Aug 21, 2023
Application note How to Measure Total Harmonic Distortion of an Op-Amp and THD + N Fundamentals PDF | HTML Nov 9, 2023
Application brief Understanding Op Amp Noise in Audio Circuits PDF | HTML Jun 14, 2021
Application note Optimizing Noise and Power with Super Beta-Fully Differential Amplifiers PDF | HTML Dec 7, 2020
Analog design Journal Q3 2009 Issue Analog Applications Journal Sep 24, 2018
Design guide TIDA-01359 Audio-OPA1632EVM Audio Interface Board Design Guide Apr 13, 2018
E-book The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML Mar 28, 2017
Application note Fully-Differential Amplifiers (Rev. E) Sep 19, 2016
Analog design Journal Using infinite-gain, MFB filter topology in fully differential active filters Jul 14, 2009
Analog design Journal Analysis of fully differential amplifiers Mar 11, 2005
Analog design Journal Designing for low distortion with high-speed op amps Mar 2, 2005
Application note Noise Analysis for High Speed Op Amps (Rev. A) Jan 17, 2005

Design & development

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

Evaluation board

AMP-PDK-EVM — Amplifier performance development kit evaluation module

The amplifier performance development kit (PDK) is an evaluation module (EVM) kit to test common operational amplifier (op amp) parameters and is compatible with most op amps and comparators. The EVM kit offers a main board with several socketed daughtercard options to fit package needs, allowing (...)

User guide: PDF | HTML
Supported products & hardware
Simulation model

OPA1632 PSpice Model (Rev. C)

SBOC064C.ZIP (2 KB) - PSpice model
Supported products & hardware
Simulation model

OPA1632 TINA-TI Reference Design (Rev. D)

SBOC100D.TSC (270 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

OPA1632 TINA-TI Spice Model (Rev. C)

SBOM182C.ZIP (6 KB) - TINA-TI Spice model
Supported products & hardware
Calculation tool

ANALOG-ENGINEER-CALC — PC software 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 (...)

Supported products & hardware
Reference design

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 (...)
Supported products & hardware
Reference design

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 (...)
Supported products & hardware
Reference design

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 (...)

Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
HVSSOP (DGN) 8 Ultra Librarian
SOIC (D) 8 Ultra Librarian

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