There may be a solution for using the PCM1802, but I cannot find it right off.
There is a 24bit ADC alternative:
ADS1252: Tutorial on High precision (24-bit) ADC - Using Arduino / Sensors - Arduino Forum
There may be a solution for using the PCM1802, but I cannot find it right off.
There is a 24bit ADC alternative:
ADS1252: Tutorial on High precision (24-bit) ADC - Using Arduino / Sensors - Arduino Forum