Preliminary Technical Data

WM8788

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PTD, December 2010, Rev 2.2

11

INPUT SIGNAL PATH

The WM8788 supports two analogue input channels. The recommended input circuit configuration

for the left input channel is illustrated in Figure 5. This is suitable for single-ended connection to line

level input signals.

Figure 5 Input Signal Path Configuration

The right input channel is identical to the left input channel. The feedback input pins INLFB and

INRFB are used to provide an adjustable gain in the input circuit, enabling input signals greater than

1Vrms to be supported.

The maximum analogue input signal level varies with AVDD and with the input circuit configuration,

as described in the following equation:

See “Applications Information” for details of the recommended external components.