MCP48CMD21-E/UN

Overview

The MCP48CMD21-E/UN is a single-channel, 12-bit buffered voltage output Digital-to-Analog Converter (DAC) featuring Multi-Time Programmable (MTP) memory and an SPI serial interface. It operates on a single supply voltage ranging from 2.7V to 5.5V, with reduced specifications available for the 1.8V to 2.7V range. The device provides rail-to-rail output capability and supports reference sources including VDD, external VREF, or an internal bandgap. Key electrical parameters include a typical settling time of 4 µs, a maximum integral nonlinearity (INL) of ±1 LSB, and a differential nonlinearity (DNL) of ±1 LSB. It utilizes a four-wire SPI interface supporting write speeds up to 50 MHz.

Feature Summary

• Integrates user-programmable MTP memory for retaining DAC settings and configuration across power cycles.
• Offers flexible voltage reference selection among device VDD, external VREF pin, and internal bandgap source.
• Supports configurable output gain options of unity (1x) or double (2x) depending on the selected reference source.
• Includes power-down modes that disconnect the output buffer or engage pull-down resistors for low-power operation.

Applications

• Set point or offset trimming in industrial control systems
• Sensor calibration requiring precise analog signal generation
• Low-power portable instrumentation devices
• PC peripherals managing analog signal interfaces

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature grade. Ensure the design accommodates the high-voltage requirement on the LAT/HVC pin for MTP programming operations. Confirm compatibility with the system's SPI clock speed limits and voltage levels before integration.

Selection Notes

Select this component when a single-channel DAC with nonvolatile memory retention is required. The 12-bit resolution suits applications needing fine analog control without the complexity of higher-resolution converters. Consider the MSOP-10 package constraints regarding thermal dissipation and board space availability during layout planning.

Part Context

This device belongs to the MCP48CXDX1/2 family of digital-to-analog converters. The family encompasses various resolutions and channel counts, distinguished by volatile RAM or nonvolatile MTP memory options. The CMD21 variant specifically denotes the single-channel, 12-bit configuration with MTP storage capabilities within this product line.

Replacement Considerations

Direct substitutes within the same family include MCP48CVD21-E/UN for volatile memory applications or MCP48CMD11-E/UN for 10-bit resolution requirements. Verify pinout compatibility and electrical specifications before swapping between variants.