MCP4811T-E/MS

Overview

The MCP4811T-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 supports SPI communication with clock frequencies up to 20 MHz and offers selectable unity or 2x gain outputs. Key electrical specifications include a typical settling time of 4.5 µs, operating current of 330 µA, and differential non-linearity (DNL) of ±0.1 LSB. It is housed in an MSOP-8 package and qualified for operation across an extended temperature range of -40°C to +125°C.

Feature Summary

• Features a rail-to-rail output amplifier capable of driving resistive and capacitive loads.
• Includes double-buffered registers allowing synchronous updates via the LDAC pin.
• Supports hardware shutdown mode to minimize power consumption while maintaining interface activity.

Applications

• Set point or offset trimming
• Sensor calibration
• Precision selectable voltage reference
• Portable instrumentation
• Calibration of optical communication devices

Procurement Notes

Verify the specific ordering suffix 'T' indicates tape-and-reel packaging when sourcing components. Confirm that the '-E' suffix corresponds to the industrial temperature grade (-40°C to +125°C). Ensure compatibility with the MSOP-8 footprint during procurement planning. Cross-reference datasheet revision DS22244B for accurate electrical parameters.

Selection Notes

Select this component for applications requiring a single-channel DAC with high accuracy and low power consumption. The 10-bit resolution provides a balance between cost and performance for general-purpose analog control. Consider the internal reference and gain options to simplify external circuitry requirements compared to devices requiring external references.

Part Context

This part belongs to the MCP4801/4811/4821 family of voltage-output DACs. The MCP4811 specifically denotes the 10-bit resolution variant within this series, sharing architectural similarities with the 8-bit MCP4801 and 12-bit MCP4821 models. All variants utilize the same pinout and SPI interface protocol.

Replacement Considerations

Direct functional substitutes within the same family include the MCP4811-E/MS (non-tape reel) and MCP4811-E/MF. For higher resolution needs, consider the MCP4821 series. For lower resolution requirements, the MCP4801 series may be suitable.

FAQ

What is the maximum SPI clock frequency supported by the MCP4811?

The device supports an SPI clock frequency of up to 20 MHz.

How does the shutdown mode affect the analog output?

In shutdown mode, the output amplifier is turned off, and the VOUT pin presents a known high resistance load of approximately 500 kΩ.

Can the full-scale output range be adjusted?

Yes, the full-scale range can be configured to 2.048V or 4.096V by setting the Gain Selection bit to unity (1x) or 2x gain, respectively.