MCP4921-E/MC

The MCP4921-E/MC from Microchip Technology is a single-channel, 12-bit buffered voltage output Digital-to-Analog Converter (DAC). It supports a wide operating voltage range of 2.7V to 5.5V and utilizes an SPI-compatible serial peripheral interface with support for up to 20 MHz clock speeds.

This DAC boasts a fast settling time of 4.5 µs (typical) and offers a selectable unity or 2x gain output. The device operates within an extended temperature range of -40°C to +125°C, making it suitable for various industrial applications. It features an external voltage reference input and a rail-to-rail output.

The MCP4921-E/MC is available in an 8-DFN (2x3) package, designed for surface mounting. Its architecture is based on a resistive string, providing low Differential Non-Linearity (DNL) error. The device includes double-buffered registers for synchronous updates of the DAC output using the LDAC pin and incorporates a Power-on Reset (POR) circuit for reliable power-up.

Applications for this DAC include set point or offset trimming, precision selectable voltage references, motor control feedback loops, and digitally-controlled multipliers/dividers. It is also used for calibration of optical communication devices.