Pi-SPi-2A0 Raspberry Pi Analog Output (mA + VDC) Interface
The all new analog output interface for the Raspberry PI is here! The Pi-SPi-2AO provides 2 channels of 4-20 mA output and simultaneous 2 channels of 0 to 10 VDC output.
The MCP4922 Digital to Analog Converter provides two channels of 12 bit conversion. The output circuit is configured to give full 20 mA Output at 3VDC, and the DAC has a 3.3 VDC reference. Full output is equal to 3/3.3 VDC * 4096 DA Counts = 3723 counts.