MCP48CMB18-E/ML

Overview

The MCP48CMB18-E/ML is an octal-channel, 10-bit buffered voltage output Digital-to-Analog Converter (DAC) featuring Multi-Time Programmable (MTP) nonvolatile memory. It operates within a supply voltage range of 2.7V to 5.5V for full specifications and 1.8V to 2.7V with reduced analog performance. The device utilizes a four-wire SPI 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, integral nonlinearity (INL) of ±1 LSB, and power-down modes that disconnect the output buffer or select pull-down resistors.

Feature Summary

• Integrates MTP nonvolatile memory capable of 32 write cycles per location for persistent configuration storage.
• Offers flexible DAC voltage reference sources including VDD, external VREF pin, and internal band gap.
• Supports configurable output gain options of 1x or 2x depending on the selected reference source.
• Includes power-on/brown-out reset protection and multiple low-power shutdown configurations.

Applications

• Set point or offset trimming in industrial systems
• Sensor calibration circuits
• Low-power portable instrumentation
• Data acquisition systems
• Motor control applications

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and temperature grade. Confirm MTP programming requirements, specifically the high-voltage level needed on the HVC pin for memory writes. Ensure system design accounts for the maximum current sourcing capabilities during programming operations.

Selection Notes

Select this component when eight independent 10-bit outputs are required with nonvolatile retention. Compare against volatile variants if power loss persistence is unnecessary. Verify that the operating voltage range aligns with the application's power supply constraints and that the SPI interface timing meets the host controller's speed requirements.

Part Context

This part belongs to the MCP48CXBX4/8 family of quad and octal DACs. It shares architectural similarities with other members like the MCP48CVB18-E/ML but differs by incorporating MTP memory instead of volatile RAM. The '18' designation indicates 10-bit resolution and octal channel count, while 'E/ML' specifies the extended temperature range and QFN package.

Replacement Considerations

Public confirmed substitute part numbers: MCP48CVB18-E/ML (volatile equivalent), MCP48CMB28-E/ML (12-bit octal), MCP48CMB08-E/ML (8-bit octal). Verify pin compatibility and memory type requirements before substitution.

FAQ

What is the maximum number of write cycles supported by the MTP memory?

The MTP memory can be written up to 32 times for each specific register location. Subsequent write commands are inhibited after the 32nd cycle.

How does the device handle the reference voltage selection?

The DAC voltage reference can be sourced from the device VDD, an external VREF pin (buffered or unbuffered), or an internal band gap voltage of approximately 1.214V.

What is the function of the LAT/HVC pin?

The LAT/HVC pin serves dual purposes: it acts as a latch input for updating DAC outputs and requires a high-voltage level (typically 7.5V) to enable MTP memory programming.