MCP4921-E/SN

Digital To Analog Converters Overview

The MCP4921-E/SN is a single-channel, 12-bit voltage output Digital-to-Analog Converter (DAC) manufactured by Microchip Technology. It operates on a single supply voltage ranging from 2.7V to 5.5V and features an SPI-compatible serial interface supporting clock frequencies up to 20 MHz. The device utilizes a resistor-string architecture with rail-to-rail buffered outputs. Key electrical specifications include a typical settling time of 4.5 µs, selectable unity or 2x gain, and an external voltage reference input. It supports software shutdown mode for power reduction and includes a Power-on Reset (POR) circuit. The component is rated for an extended operating temperature range from -40°C to +125°C.

Digital To Analog Converters Feature Summary

• Resistor-string architecture providing low differential non-linearity error and fast settling times
• SPI compatible serial interface with support for Mode 0,0 and Mode 1,1 configurations
• Rail-to-rail output amplifier with selectable unity or 2x gain settings
• Integrated Power-on Reset (POR) circuit ensuring reliable startup states

Digital To Analog Converters Applications

• Set point or offset trimming in industrial control systems
• Motor control feedback loop regulation
• Digitally-controlled multiplier or divider circuits
• Calibration of optical communication devices

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'E' indicates automotive qualification status as per Microchip documentation. Confirm the 'SN' suffix corresponds to the 8-lead SOIC package variant. Ensure the ordering part number matches the required temperature grade and packaging format before procurement.

Digital To Analog Converters Selection Notes

Select this component when a single-channel, high-resolution digital-to-analog conversion is required with SPI connectivity. Consider the 12-bit resolution and 20 MHz interface speed for applications demanding precise analog signal generation. Evaluate the external reference requirement against internal reference alternatives if available in other product lines.

Digital To Analog Converters Part Context

The MCP4921 belongs to the MCP49x1 family of single-channel DACs, which also includes the 8-bit MCP4901 and 10-bit MCP4911 variants. These devices share identical pinouts, interfaces, and architectural features, differing primarily in resolution. This family is designed for general-purpose calibration and signal conditioning tasks requiring low noise and high accuracy.

Digital To Analog Converters Replacement Considerations

Direct functional replacements within the same package and specification include the MCP4901 and MCP4911, noting the difference in bit resolution. For dual-channel requirements, consider the MCP4922. Verify that any substitute maintains the 12-bit resolution and SPI compatibility.