1 Features

• Superior sound quality

• Ultra low distortion: 0.000026%

• 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

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 aquisition (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 pre-driver for Class-

D amplifiers. It delivers superior audio quality, very

low noise, large output voltage swing and high current

drive. The OPA1633 has an excellent gain bandwidth

of 200 MHz and very fast slew rate of 80 V/μs which

helps to produce exceptionally low distortion. A very

low input voltage noise of 1.1 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 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 being used.

The OPA1633 is characterized for operation from –

40°C to +85°C and is available in an SO-8 package

and a thermally-enhanced MSOP-8 PowerPAD™

package.