MCP48CMB08-E/ML

Overview

The MCP48CMB08-E/ML is an octal-channel, 8-bit buffered voltage output Digital-to-Analog Converter (DAC) featuring Multi-Time Programmable (MTP) nonvolatile memory. It operates with a supply voltage range of 2.7V to 5.5V and supports SPI serial interfaces with write speeds up to 50 MHz. The device includes power-on/brown-out reset protection, configurable power-down modes, and selectable DAC voltage reference sources such as VDD, external VREF, or an internal band gap. It is housed in a 20-lead QFN package.

Feature Summary

• Integrates MTP nonvolatile memory for persistent storage of DAC output values and configuration registers.
• Provides eight independent buffered voltage outputs with 1 LSB INL specification.
• Supports flexible reference selection including internal band gap, VDD, or external VREF pins.

Applications

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

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature grade. Confirm that the E/ML designation corresponds to the 20-lead QFN package and extended temperature range. Ensure compatibility with system requirements regarding MTP programming voltage levels on the LAT/HVC pin before finalizing procurement.

Selection Notes

Select this component when multiple analog outputs are required within a single package footprint. The MTP memory feature allows for factory or field calibration data retention without external EEPROMs. Consider the 8-bit resolution and SPI interface speed relative to system update rates. Verify that the 20-QFN package fits the available PCB space and thermal management constraints.

Part Context

This part belongs to the MCP48CXBX4/8 family of quad and octal DACs. The 'C' indicates standard specifications, 'M' denotes MTP memory, 'B' signifies 8-bit resolution, and '08' identifies it as an octal channel device. It shares the same pinout and core architecture with volatile RAM variants like the MCP48CVB08.

Replacement Considerations

MCP48CVB08-E/ML: Identical electrical performance but uses volatile RAM instead of MTP memory; output values reset on power cycle.

FAQ

How many times can the MTP memory be programmed?

The MTP memory locations can be written up to 32 times. After 32 cycles, subsequent writes are inhibited, and the value from the 32nd write is retained.

What is the function of the LAT/HVC pin?

The LAT/HVC pin serves two functions: it acts as a latch input to transfer data from the SPI shift register to the DAC registers, and it requires a high-voltage level (typically 7.5V) to enable MTP programming operations.

Can the device operate at 1.8V?

Yes, the device supports operation down to 1.8V, but analog specifications are reduced in this range compared to the full 2.7V to 5.5V operating range.