9.3.1.1 Input Configuration, Gain Setting And Master / Slave Operation

TPA3220 is designed to accept either a differential or a single-ended audio input signal. To accept a wide range of system front ends TPA3220 has selectable input gain that allows full scale output with a wide range of input signal levels.

Best system noise performance is obtained with balanced audio interface. However, to be used in systems with only a single ended audio input signal available, one input terminal can be connected to AC ground, to accept single ended audio input signals.

Figure 30. Balanced Audio Input Configuration

In systems with single ended audio inputs the device gain will typically need to be set higher than for systems with balanced audio input signals.

Figure 31. Single Ended Audio Input Configuration