MCP4811-E/MS

Overview

The MCP4811-E/MS is a single-channel, 10-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 communicates via an SPI-compatible serial interface supporting clock frequencies up to 20 MHz. Key electrical specifications include a typical settling time of 4.5 µs, selectable unity or 2x gain output, and rail-to-rail output capability. It supports hardware shutdown mode for power savings and includes a Power-on Reset circuit.

Feature Summary

• Integrates a high-precision internal 2.048V voltage reference
• Features a rail-to-rail buffered analog output amplifier
• Supports simultaneous DAC output updates via the LDAC pin
• Includes software and hardware shutdown modes for low-power operation

Applications

• Set point or offset trimming in industrial systems
• Sensor calibration and compensation
• Precision selectable voltage reference generation
• Portable battery-powered instrumentation
• Calibration of optical communication devices

Procurement Notes

Verify the specific ordering suffix '-E/MS' corresponds to the MSOP-8 package and extended temperature range (-40°C to +125°C). Confirm RoHS compliance status and lead-free finish requirements against the manufacturer's current datasheet revision. Ensure the application environment matches the specified operating voltage and temperature limits to maintain guaranteed performance metrics.

Selection Notes

Select this component when a single-channel, 10-bit resolution is required with an integrated reference source. Compare against the MCP4801 (8-bit) and MCP4821 (12-bit) variants if resolution needs differ. Consider the MSOP package constraints regarding thermal resistance and PCB layout. Verify that the SPI interface timing parameters align with the host microcontroller's capabilities.

Part Context

This part belongs to the MCP48x1 family of single-channel DACs, which also includes the MCP4801 and MCP4821. These devices share identical pinouts, interfaces, and core architectures, differing primarily in resolution. The family is designed for applications requiring calibrated analog outputs in space-constrained environments.

Replacement Considerations

Direct functional substitutes within the same package and specification include the MCP4801-E/MS and MCP4821-E/MS. Note that these alternatives offer different resolutions (8-bit and 12-bit, respectively) while maintaining the same pinout and interface compatibility.