Fully Differential I/O Audio Amplifier

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.