Cirrus Logic CS5531 Series (inc 5532, 5533, 5534).

16 and 24-bit ADC's. Built-in integral gain amplifier (1x-64x) and noise rejection nicely dispenses with lots of external conditioning and amplification circuitry ensuring minimum component count. I2C easily interfaces with PIC's and PBP. Follow the instructions in the comprehensive datasheet for setup, configuration and use.

Download Datasheet here...

http://www.cirrus.com/en/pubs/proDatasheet/cs5531-5.pdf

Find overview, links to errata and other data from here...

http://www.cirrus.com/en/products/pro/detail/P95.html

Melanie