OPA1632

HVSSOP (DGN)

8

9 mm² 3 x 3

SOIC (D)

8

19 mm² 3.91 x 4.9

Superior Sound Quality

Ultra Low Distortion: 0.000022%

Low Noise: 1.3 nV/√Hz

High Speed:

Slew Rate: 50 V/μs
Gain Bandwidth: 180 MHz

Fully Differential Architecture:

Balanced Input and Output Converts Single-Ended Input to Balanced Differential Output

Wide Supply Range: ±2.5 V to ±16 V

Shutdown to Conserve Power

APPLICATIONS

Audio ADC Driver
Balanced Line Driver
Balanced Receiver
Active Filter
Preamplifier

Superior Sound Quality

Ultra Low Distortion: 0.000022%

Low Noise: 1.3 nV/√Hz

High Speed:

Slew Rate: 50 V/μs
Gain Bandwidth: 180 MHz

Fully Differential Architecture:

Balanced Input and Output Converts Single-Ended Input to Balanced Differential Output

Wide Supply Range: ±2.5 V to ±16 V

Shutdown to Conserve Power

APPLICATIONS

Audio ADC Driver
Balanced Line Driver
Balanced Receiver
Active Filter
Preamplifier

The OPA1632 is a fully-differential amplifier designed for driving high-performance audio analog-to-digital converters (ADCs). It provides the highest audio quality, with very low noise and output drive characteristics optimized for this application. The OPA1632’s excellent gain bandwidth of 180 MHz and very fast slew rate of 50 V/μs produce exceptionally low distortion. Very low input noise of 1.3 nV/√Hz further ensures 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 also enhances the flexibility of this amplifier.

The OPA1632 is available in an SO-8 package and a thermally-enhanced MSOP-8 PowerPAD package.

For all available packages, see the orderable addendum at the end of the data sheet.

The OPA1632 is a fully-differential amplifier designed for driving high-performance audio analog-to-digital converters (ADCs). It provides the highest audio quality, with very low noise and output drive characteristics optimized for this application. The OPA1632’s excellent gain bandwidth of 180 MHz and very fast slew rate of 50 V/μs produce exceptionally low distortion. Very low input noise of 1.3 nV/√Hz further ensures 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 also enhances the flexibility of this amplifier.

The OPA1632 is available in an SO-8 package and a thermally-enhanced MSOP-8 PowerPAD package.

For all available packages, see the orderable addendum at the end of the data sheet.

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Technical documentation

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	Type	Title	Date
*	Data sheet	OPA1632 High-Performance, Fully-Differential Audio Operational Amplifier datasheet (Rev. C)	29 Oct 2015
	Application note	Understanding Op Amp Noise in Audio Circuits	14 Jun 2021
	Application note	Optimizing Noise and Power with Super Beta-Fully Differential Amplifiers	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

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Simulation model

OPA1632 PSpice Model (Rev. C)

SBOC064C.ZIP (2 KB) - PSpice Model

Simulation model

OPA1632 TINA-TI Reference Design (Rev. D)

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

Simulation model

OPA1632 TINA-TI Spice Model (Rev. C)

SBOM182C.ZIP (6 KB) - TINA-TI Spice Model

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 (...)

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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 op-amp gain with feedback (...)