I am using AD8652 for my audio application.The power supply for the Opamp is from Synchronous buck controller 12-15V dc input to 5V output.Since the Op-amp has Low PSRR at >300K.Is there any recommended filter circuits for powering the Op-amps and codecs to increase the performance of the opamps.In my case regulators cannot be used since my current requirement if of around 4 Amps from 5 V.
Power rails used in design is of 5V from 12V -15V ,
3.3V from 5V(ADP1864),
1.1V from 5V(ADP1864) . we are using 3.3V for Codec AD1939.