MCP4821-E/P

Overview

The MCP4821-E/P is a single-channel, 12-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 and supports SPI communication with clock speeds up to 20 MHz. Key electrical specifications include a typical settling time of 4.5 µs, rail-to-rail output capability, and selectable unity or 2x gain. It is housed in an 8-pin PDIP package and functions within an extended temperature range of -40°C to +125°C.

Feature Summary

• Features a high-precision internal voltage reference for stable operation without external components.
• Supports simultaneous latching of DAC outputs via the LDAC pin for synchronized updates.
• Includes hardware shutdown functionality to minimize power consumption during idle states.

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

Procurement Notes

Verify that the ordering suffix 'P' corresponds to the PDIP package type required for through-hole mounting. Confirm the '-E' designation indicates the extended industrial temperature range (-40°C to +125°C). Ensure the specific revision of datasheet DS22244B matches the manufacturing lot to guarantee accurate timing and electrical characteristics.

Selection Notes

Select this component when a single-channel, 12-bit resolution is required with an integrated reference. The PDIP package is suitable for prototyping or applications requiring through-hole assembly. Consider the 2.7V to 5.5V supply range and SPI interface compatibility with the host microcontroller before finalizing the design.

Part Context

This part belongs to the MCP48X1 family of single-channel DACs, which also includes the 8-bit MCP4801 and 10-bit MCP4811 variants. These devices share identical pinouts, interfaces, and core functionalities, differing primarily in resolution and associated linearity specifications. The dual-channel counterparts are designated as MCP4802, MCP4812, and MCP4822.

Replacement Considerations

Direct functional substitutes within the same package and specification profile include the MCP4801-E/P and MCP4811-E/P. Note that these alternatives offer lower resolutions (8-bit and 10-bit, respectively) while maintaining the same interface and pinout configuration.