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FDA801B

General introduction

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General introduction

FDA801B is a fully digital single chip class D amplifier with high immunity to the

demodulation filter effects. The high integration level and the on-board signal processing

allow excellent audio performance to be achieved.

Thanks to the digital input and to the feedback strategy in the power stage that make the

amplifier immune from the output filter components non-linearity, the number and size of the

external components are minimized.

A number of features are included to reduce EMI and the fully digital approach provides a

strong GSM immunity.

FDA801B includes: digital I2C and I2S interfaces, internal 24 bits DAC conversion, digital

signal processing for interpolation and noise shaping, innovative self-diagnostic functions

and automatic detection of wrong load connections or variation of the load, internal PLL for

a clock generation. Moreover FDA801B provides a breakthrough innovative digital

impedance-meter which is able to communicate via I2C the output load value.