DocID028632 Rev 1 7/11
FDA801B General introduction
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2 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 I
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C and I
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S 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 I
2
C the output load value.