Microchip MCP4922-E/SL Dual 12-Bit DAC with SPI Interface, SOIC-14

The Microchip MCP4922-E/SL is a dual-channel, 12-bit digital-to-analogue converter (DAC) featuring a high-speed SPI interface. Engineered for precision control in demanding electronic applications, this device operates from a single supply voltage ranging from 2.7V to 5.5V, offering excellent flexibility for various system designs.

A key feature is the independent shutdown capability for each DAC channel, either via the active-low SHDN pin or through configuration register bits. In shutdown mode, internal circuits are powered down to minimise current consumption, while the output amplifier presents a known high-impedance load. The device incorporates a double-buffered input register and a LDAC pin, enabling synchronous updates of both DAC outputs for precise timing control.

Designed for reliability, the MCP4922-E/SL includes a Power-on Reset (POR) circuit to ensure predictable startup behaviour. It delivers rail-to-rail voltage outputs and supports an external voltage reference for enhanced application flexibility. With a maximum SPI clock frequency of 20MHz and a typical settling time of just 4.5µs, it is capable of fast, accurate signal generation.

Primary Applications

This versatile DAC is ideal for a wide range of industrial and communication systems, including:

• Set-point or offset trimming in control systems
• As a precision, digitally-selectable voltage reference
• Within motor control and servo feedback loops
• Functioning as a digitally-controlled multiplier or divider
• For calibration circuits in optical communication devices

Key Specifications & Performance

The device guarantees 10-bit minimum resolution across its full operating temperature range. It offers low integral non-linearity (INL) and differential non-linearity (DNL) errors, ensuring high analogue output accuracy. The compact 14-pin SOIC package is designed for surface-mount assembly,