MCP4811-E/MC

Overview

The MCP4811-E/MC is a single-channel, 10-bit buffered voltage output Digital-to-Analog Converter (DAC) manufactured by Microchip Technology. It operates from a single 2.7V to 5.5V supply and features an SPI-compatible serial interface with 20 MHz clock support. The device includes a 2.048V internal voltage reference with a 50 ppm/°C temperature coefficient. Key electrical parameters include a typical settling time of 4.5 µs, selectable unity or 2x gain output, and rail-to-rail output swing. It supports hardware shutdown mode for power savings and operates within an extended temperature range of -40°C to +125°C.

Feature Summary

• Features a resistive string architecture providing low differential non-linearity error and fast settling times.
• Includes double-buffered registers allowing synchronous updates of the DAC output via the LDAC pin.
• Integrates a Power-on Reset (POR) circuit to ensure reliable power-up states.

Applications

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

Procurement Notes

Verify the specific package suffix 'MC' against official Microchip documentation to confirm the exact physical footprint and pinout configuration. Ensure that the operating conditions, including supply voltage and load requirements, align with the datasheet specifications before finalizing procurement orders.

Selection Notes

Select this component when a single-channel, 10-bit resolution is required with an integrated voltage reference. Consider the MCP4811 over the MCP4801 or MCP4821 based on the necessary balance between resolution precision and system cost. Verify that the SPI interface timing meets the microcontroller's capabilities.

Part Context

This part belongs to the MCP4801/4811/4821 family of 8/10/12-bit voltage output DACs. These devices share similar AC/DC performance characteristics and are designed for applications requiring high accuracy and low noise. The family offers options for varying resolutions while maintaining a consistent interface and feature set.

Replacement Considerations

Direct substitutes within the same family include the MCP4801 (8-bit) and MCP4821 (12-bit), provided the resolution difference is acceptable. Other compatible parts may include the MCP4901 series if external references are permissible.