MCP4811T-E/MC

Overview

The MCP4811T-E/MC is a single-channel, 10-bit buffered voltage output Digital-to-Analog Converter (DAC) manufactured by Microchip Technology. It features an internal 2.048V voltage reference and operates on a single supply voltage ranging from 2.7V to 5.5V. The device utilizes an SPI-compatible serial interface with support for up to 20 MHz clock speeds. Key electrical specifications include a typical settling time of 4.5 µs, an operating current of 330 µA, and an extended temperature range from -40°C to +125°C. The component is housed in an MSOP-8 package.

Feature Summary

• Features a rail-to-rail output amplifier capable of driving resistive and capacitive loads.
• Includes selectable unity or 2x gain configuration for the full-scale output range.
• Incorporates double-buffered registers allowing synchronous updates via the LDAC pin.
• Provides hardware shutdown capability to minimize power consumption during idle states.

Applications

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

Procurement Notes

Verify the specific ordering suffix 'T' indicates tape-and-reel packaging when sourcing this component. Confirm that the '-E' designation corresponds to the extended industrial temperature range requirements of your application. Ensure compatibility with the MSOP-8 footprint and thermal pad connection guidelines specified in the datasheet.

Selection Notes

Select the MCP4811T-E/MC when a 10-bit resolution is required for moderate precision applications. Consider this part over the MCP4801 if higher resolution is needed, or over the MCP4821 if cost and lower power consumption are prioritized over 12-bit accuracy. Verify that the internal 2.048V reference meets the system's voltage range needs without external components.

Part Context

This component belongs to the MCP4801/4811/4821 family of voltage-output DACs. The family shares identical pinouts, interfaces, and core architectures, differing primarily in resolution: 8-bit for MCP4801, 10-bit for MCP4811, and 12-bit for MCP4821. All variants offer similar performance characteristics regarding speed, noise, and power consumption.

Replacement Considerations

Direct functional substitutes within the same package and specification include the MCP4811-E/MS and MCP4811-E/MF. These parts share the same 10-bit resolution, SPI interface, and electrical characteristics. Verify that the alternative package type matches the PCB layout constraints before substitution.