MCP48CMD21-E/MG

Overview

The MCP48CMD21-E/MG is a single-channel, 12-bit buffered voltage output Digital-to-Analog Converter (DAC) featuring Multi-Time Programmable (MTP) nonvolatile memory. It operates on a single supply voltage ranging from 2.7V to 5.5V, with reduced specifications available between 1.8V and 2.7V. The device utilizes a four-wire SPI-compatible serial interface supporting write speeds up to 50 MHz and read speeds up to 25 MHz. Key electrical characteristics include a typical settling time of 4 µs, an Integral Nonlinearity (INL) specification of ±1 LSB, and a Differential Nonlinearity (DNL) of ±1 LSB. The MTP memory allows for 32 user-programmable locations per register, retaining data for at least 10 years at +85°C.

Feature Summary

• Integrated MTP nonvolatile memory retains DAC settings and configuration across power cycles without requiring external backup batteries.
• Flexible reference input options allow selection between device VDD, an external VREF pin, or an internal bandgap voltage source.
• Programmable output gain provides unity (1x) or doubled (2x) scaling capabilities when not utilizing the internal VDD as the reference.
• Advanced power-down modes enable high-impedance output disconnection or configurable pull-down resistor selection to minimize current consumption.

Applications

• Set point or offset trimming in industrial control systems
• Sensor calibration and signal conditioning circuits
• Low-power portable instrumentation devices
• PC peripherals requiring analog output generation

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Ensure that the programming hardware supports the required high-voltage level on the LAT/HVC pin for MTP operations. Confirm compatibility with system voltage levels, particularly regarding the 1.8V to 2.7V reduced specification range if operating below the standard 2.7V threshold.

Selection Notes

Select this component when nonvolatile storage of DAC values is required within a single channel architecture. The 12-bit resolution suits applications demanding moderate precision with low cost. Consider the MTP endurance limit of 32 write cycles; for higher endurance requirements, volatile memory variants or EEPROM-based devices should be evaluated instead. Ensure the application can provide the necessary high-voltage signal for memory programming.

Part Context

This part belongs to the MCP48CXDX1/2 family of digital-to-analog converters, which includes both volatile (MCP48CVD) and nonvolatile (MCP48CMD) memory options. The family offers resolutions of 8, 10, and 12 bits in single and dual channel configurations. The 'CMD' designation specifically indicates the inclusion of Multi-Time Programmable memory, distinguishing it from the volatile 'CVD' series within the same package and performance envelope.

Replacement Considerations

Direct replacements within the same family include MCP48CMD11-E/MG (10-bit) or MCP48CMD01-E/MG (8-bit) for lower resolution needs. For dual-channel requirements, consider the MCP48CMD21-E/MG variant. Volatile alternatives such as MCP48CVD21-E/MG are suitable if nonvolatile retention is unnecessary.