MCP4821-E/SN

Overview

The MCP4821-E/SN 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 reference voltage. 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, rail-to-rail output swing, and selectable unity or 2x gain. It supports hardware and software shutdown modes for power optimization.

Feature Summary

• Integrated high-precision internal voltage reference with low temperature coefficient
• Rail-to-rail buffered analog output amplifier for direct drive capability
• Dual-latch architecture enabling synchronous updates via LDAC pin
• Configurable shutdown mode reducing current consumption significantly

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 suffix 'E' indicates the extended temperature range (-40°C to +125°C) and 'SN' denotes the SOIC-8 package. Confirm that the datasheet revision matches the required specifications for your design. Ensure compliance with RoHS directives if applicable to your manufacturing region. Cross-reference the manufacturer's part number directly with official distributor catalogs to avoid counterfeit components.

Selection Notes

Select this component when a single-channel, 12-bit resolution is required with an integrated reference source. Compare against the MCP4822 if dual-channel functionality is needed instead of single-channel. Consider the MCP4921 series if an external voltage reference is preferred over the internal one. Evaluate the power consumption requirements against the active and shutdown current specifications provided in the electrical characteristics table.

Part Context

This device belongs to the MCP48x1 family of 8/10/12-bit DACs from Microchip Technology. It shares architectural similarities with the MCP49x1 series but differs in its use of an internal versus external voltage reference. The SOIC-8 package variant provides a compact surface-mount solution suitable for space-constrained PCB layouts while maintaining thermal performance within specified limits.

Replacement Considerations

The MCP4822 serves as a functional replacement if dual-channel output is acceptable. For external reference designs, the MCP4921 offers similar performance characteristics. Verify pinout compatibility and register configuration before substituting any alternative part numbers in existing designs.