SIM808 PCM Interface Codec

Hi All,
This is my first post on this forum.
I want to use the pcm interface of sim808. Can anyone suggest a suitable LPCM codec?.
According to the SIM808 document “sim800_hardware_design_v1.09”, the pcm interface of sim808 can only be configured in master mode with PCM Clock Rate of 256KHz and 16bit pcm.