MCP4811-E/SN

Overview

The MCP4811-E/SN 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 SPI-compatible serial interface supporting clock frequencies up to 20 MHz. The device incorporates a high-precision internal voltage reference of 2.048V with a temperature coefficient of 50 ppm/°C. Users can configure the full-scale output range to be either 2.048V or 4.096V by selecting unity or 2x gain. The DAC utilizes a resistive string architecture, providing a typical settling time of 4.5 µs and rail-to-rail output capability. It supports simultaneous latching via the LDAC pin and includes hardware shutdown functionality for power management.

Feature Summary

• Integrates a precision internal voltage reference with low noise and temperature stability
• Features a rail-to-rail buffered output amplifier capable of driving capacitive loads
• Supports synchronous updates through double-buffered registers and the LDAC pin
• Includes configurable shutdown modes to minimize power consumption in standby

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 against official Microchip documentation to confirm package type and temperature grade. Ensure the component meets RoHS3 compliance requirements for your assembly process. Cross-reference the datasheet revision date to confirm electrical characteristics match your design specifications before finalizing procurement.

Selection Notes

Select this component when a single-channel, 10-bit resolution is required with integrated reference capabilities. Consider the MCP4801 for lower resolution needs or the MCP4821 for higher precision applications. Verify that the SPI interface timing constraints align with the microcontroller's maximum clock speed and that the SOIC package fits the available PCB footprint.

Part Context

This part belongs to the MCP48x1 family of single-channel DACs, which also includes the 8-bit MCP4801 and 12-bit MCP4821 variants. These devices share identical pinouts, interfaces, and core functionalities, differing primarily in resolution and associated accuracy metrics. The family is designed for cost-sensitive applications requiring calibrated analog outputs without external reference components.

Replacement Considerations

Direct functional substitutes within the same package include the MCP4801-E/SN and MCP4821-E/SN. Note that resolution differences may impact system accuracy. Other manufacturers' 10-bit SPI DACs require verification of pin compatibility, voltage levels, and register maps.