MCP4811-E/P

Overview

The MCP4811-E/P 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 for low DNL error and fast settling time of 4.5 µs. It supports SPI communication with clock frequencies up to 20 MHz and includes selectable unity or 2x gain output options. The component is housed in an 8-pin PDIP package and is specified for operation across an extended temperature range from -40°C to +125°C.

Feature Summary

• Features a rail-to-rail buffered analog output amplifier capable of driving loads close to the power supply rails.
• Includes double-buffered registers allowing synchronous updates of the DAC output via the LDAC pin.
• Incorporates a Power-on Reset (POR) circuit to ensure reliable initialization upon power-up.
• Supports hardware shutdown mode to minimize power consumption while maintaining high-impedance output.

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 supplies
• Calibration of optical communication devices

Procurement Notes

Verify the specific ordering suffix '-E/P' corresponds to the PDIP-8 package and the extended temperature grade (-40°C to +125°C). Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure that the application environment does not exceed the absolute maximum ratings defined in the datasheet to maintain device reliability.

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 if higher resolution is needed, or over the MCP4821 if lower power consumption and cost are prioritized over 12-bit precision. Verify that the SPI interface timing requirements of the host microcontroller are compatible with the device's specifications.

Part Context

The MCP4811 belongs to the MCP4801/4811/4821 family of 8/10/12-bit voltage output DACs. These devices share identical pinouts, interfaces, and core functionalities, differing primarily in resolution. The family is designed for applications requiring signal compensation or calibration where a compact, low-power solution with an internal reference is beneficial.

Replacement Considerations

The MCP4811-E/MS serves as a surface-mount alternative within the same family, offering identical electrical performance in an MSOP-8 package. Other members of the series include the MCP4801 (8-bit) and MCP4821 (12-bit), which provide different resolutions but maintain the same interface and package options.