M87x (M871, M872) Manual M87x Bitronics Modular.
SDM872 - 16 Single Ended/8 Differential Input 12-BIT DATA ACQUISITION SYSTEMS
WM8722 - Stereo DAC with Integrated Tone Generator and Line/Variable Level Outputs
WM8728 - 24-bit/ 192kHz Stereo DAC with Volume Control and DSD Support