MCP48CMB28-20E/ST

Overview

The MCP48CMB28-20E/ST is an octal-channel, 12-bit 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 resistor-string architecture to achieve a typical Integral Nonlinearity (INL) of ±1 LSB. It supports SPI serial interfaces with write speeds up to 50 MHz and read speeds up to 25 MHz. Key electrical parameters include a maximum settling time of 4 µs, a typical power supply current of 940 µA at 10 MHz, and an operating temperature range of -40°C to +125°C.

Feature Summary

• Integrates MTP nonvolatile memory for persistent storage of DAC codes and configuration registers without external components.
• Provides selectable voltage reference sources including VDD, external VREF pin, or internal band gap.
• Supports flexible output gain configurations with unity or 2x gain options when using external references.
• Includes programmable power-down modes allowing high-impedance output or specific pull-down resistor selection.

Applications

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

Procurement Notes

Verify the ordering suffix '20E/ST' against official Microchip documentation to confirm package type and temperature grade. Ensure compatibility with system requirements for the LAT/HVC programming voltage if utilizing the nonvolatile memory features. Confirm that the octal channel count aligns with the design's I/O density needs.

Selection Notes

Select this component when multiple analog outputs are required within a compact footprint. The MTP memory feature eliminates the need for external EEPROM for storing calibration data. Consider the 50 MHz SPI interface speed for high-throughput applications. Verify that the 12-bit resolution meets the system's accuracy requirements for signal generation.

Part Context

This part belongs to the MCP48CXBX4/8 family, which includes quad and octal variants with volatile or nonvolatile memory options. The 'M' designation indicates the presence of MTP memory, while 'B28' specifies the 12-bit resolution and octal channel configuration. It shares architectural similarities with other Microchip DACs but offers distinct multi-channel integration.

Replacement Considerations

Direct substitutes within the same family include MCP48CMB18-20E/ST (10-bit) and MCP48CMB08-20E/ST (8-bit). For volatile memory equivalents, consider the MCP48CVB28 series. Cross-family replacements require verification of pinout compatibility and SPI interface timing constraints.