Hi,I have a newbee question: how do I convert the (ADAU1466) serial data outputs to class D amps with PWM inputs?Regards,JohnM
The short answer is that you can't do it without an external modulator. None of the SigmaDSP family run fast enough to generate a PWM stream with audio level bandwidth and/or dynamic range. However, the '66 can interface directly with any class-D amp IC with an I2S or TDM input.
There actually is one part in the SigmaDSP family that has a PDM output and that is the ADAU1772 and ADAU1777. But I think Ken's suggestion for using a Class-D amp that has I2S inputs is the best solution.