1 Features

• Excellent sound quality

• Ultra low distortion: 132 dB

• Low noise: 1.1 nV/√Hz

• High speed:

– Slew rate: 80 V/μs

– Gain bandwidth product: 200 MHz

• Fully differential architecture:

– Balanced input and output converts singleended

input to balanced differential output

• Wide supply range: ±2.5 V to ±17.5 V

• Shutdown current: 0.77 mA (VS = ± 5 V)

• Temperature range: –40°C to +85°C

• Packages: HVSSOP-8, SOIC-8

2 Applications

• Professional audio mixer or control surface

• Professional microphones and wireless systems

• Professional speaker systems

• Professional audio amplifier

• Soundbar

• Turntable

• Professional video camera

• Guitar and other instrument amplifier

• Data acquisition (DAQ)

• Pin-compatible upgrade to the OPA1632

3 Description

The OPA1633 is a fully differential amplifier (FDA)

designed to drive high-performance audio analog-todigital

converters (ADCs) or as a predriver for class-D

amplifiers.

The OPA1633 delivers excellent audio quality, very

low noise, a large output voltage swing, and a high

current drive. The OPA1633 has an excellent gain

bandwidth of 200 MHz and a very fast slew rate of 80

V/μs that helps produce exceptionally low distortion.

A very low input voltage noise of 1.1 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 OPA1633

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 OPA1633 is characterized to operate from −40°C

to +85°C and available in an SO-8 package and a

thermally enhanced, HVSSOP PowerPAD™ integrated

circuit package.