MCP4802T-E/MS

Overview

The MCP4802T-E/MS is a dual-channel, 8-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. The device utilizes a resistive string architecture with SPI compatibility supporting up to 20 MHz clock speeds. Key electrical parameters include a typical settling time of 4.5 µs, a maximum input current of 415 µA at 5V, and rail-to-rail output capability. It is housed in an 8-lead MSOP package and qualified under AEC-Q100 standards for automotive applications.

Feature Summary

• Dual-channel buffered voltage outputs with selectable unity or 2x gain configuration
• Integrated high-precision internal voltage reference with low temperature coefficient
• Simultaneous latching of both DAC channels via the LDAC pin for synchronized updates
• Software-controllable shutdown mode for individual channel power reduction

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Ensure the component meets RoHS compliance requirements for your assembly process. Confirm that the E-grade designation aligns with the required extended temperature range specifications for your final product design.

Selection Notes

Select this component when a dual-channel solution with integrated reference is required to minimize external BOM count. The 8-bit resolution is suitable for applications where moderate accuracy is sufficient. Consider the 2.7V minimum supply voltage for low-power portable designs. Verify that the SPI interface timing matches the host microcontroller's capabilities.

Part Context

This part belongs to the MCP48X2 family of dual-channel DACs, which also includes the 10-bit MCP4812 and 12-bit MCP4822 variants. Single-channel equivalents are available as the MCP4801, MCP4811, and MCP4821. The T-E/MS suffix indicates a tape-and-reel packaging format within the E-grade temperature range, distinct from tube-packaged versions.

Replacement Considerations

Direct functional substitutes within the same family include the MCP4812T-E/MS for higher resolution or the MCP4801T-E/MS for single-channel requirements. Cross-family replacements may require verification of pinout compatibility and register mapping differences.