MCP4821-E/MS

Overview

The MCP4821-E/MS is a single-channel, 12-bit buffered 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 internal 2.048V voltage reference with a temperature coefficient of 50 ppm/°C. The device utilizes a resistive string architecture and supports SPI communication with clock frequencies up to 20 MHz. Key electrical specifications include a typical settling time of 4.5 µs, rail-to-rail output capability, and selectable unity or 2x gain. It functions within an extended temperature range of -40°C to +125°C.

Feature Summary

• Rail-to-rail analog output amplifier for full-scale signal utilization
• Integrated 2.048V precision voltage reference source
• SPI serial interface supporting high-speed data transfer
• Configurable shutdown mode for power conservation

Applications

• Set point or offset trimming in industrial systems
• Sensor calibration for temperature, pressure, and humidity
• Precision selectable voltage reference generation
• Portable instrumentation powered by battery sources
• Calibration of optical communication devices

Procurement Notes

Verify the specific suffix 'E' indicates the extended temperature grade (-40°C to +125°C) and 'MS' denotes the MSOP-8 package. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure that the ordering information matches the exact datasheet revision DS22244B to avoid discrepancies in pinout or electrical characteristics during procurement.

Selection Notes

Select this component when a single-channel, high-resolution digital-to-analog conversion is required with minimal external components. The integrated reference eliminates the need for external voltage sources. Consider the 12-bit resolution and 4.5 µs settling time for applications requiring moderate speed and accuracy. Verify that the system's microcontroller supports the required SPI modes and that the operating voltage aligns with the 2.7V to 5.5V specification.

Part Context

This part belongs to the MCP4801/4811/4821 family of DACs, differentiated primarily by resolution: 8-bit, 10-bit, and 12-bit respectively. All members share identical pinouts, interfaces, and core architectures. The MCP4821 provides the highest resolution in this series, offering 4096 distinct output levels. It is functionally similar to the MCP4921 but includes an internal reference, whereas the MCP4921 requires an external reference.

Replacement Considerations

MCP4821-E/MC: Same electrical specifications and functionality; differs only in package type (DFN vs. MSOP). MCP4821-E/SN: Same electrical specifications and functionality; differs only in package type (SOIC vs. MSOP). MCP4822-E/MS: Dual-channel variant; verify if single-channel usage is acceptable.