MCP4921 Overview
The MCP4901/4911/4921 devices are single channel 8-bit, 10-bit and 12-bit buffered voltage output Digital-to-Analog Converters (DACs), respectively. The devices operate from a single 2.7V to 5.5V supply with an SPI patible Serial Peripheral Interface. The user can configure the full-scale range of the device to be VREF or 2 VREF by setting the gain selection option bit (gain of 1 of 2).