The Texas offers a TLV series of a Burr-Brown high performance, audio analog-to-digital converter that supports simultaneous sampling of up to four analog channels or eight digital channels for the pulse density modulation microphone input. The device supports line and microphone inputs, and allows for both single-ended and differential input.
configurations.

4-channel analog microphones or line-in
Programmable microphone bias or supply voltage generation
Low-latency signal processing filter selection
Programmable HPF and biquad digital filters