MCP48CMB28-E/ML

Overview

The MCP48CMB28-E/ML 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 and utilizes a buffered voltage output architecture. The device supports SPI serial interfaces with write speeds up to 50 MHz and read speeds up to 25 MHz. Key electrical specifications include a typical settling time of 4 µs, a maximum Integral Nonlinearity (INL) of ±1 LSB, and a gain error of ±0.6% of Full Scale Range (FSR). It incorporates internal power-on/brown-out reset protection and multiple power-down modes.

Feature Summary

• Integrates MTP nonvolatile memory for retaining DAC output values and configuration registers without external storage components.
• Provides eight independent buffered voltage outputs with selectable gain settings of 1x or 2x.
• Supports flexible reference voltage sources including VDD, external VREF pin, and an internal band gap.
• Features WiperLock™ technology for simultaneous updating of all DAC outputs via the LAT pins.

Applications

• Set point or offset trimming in industrial control systems
• Sensor calibration and signal conditioning
• Low-power portable instrumentation
• Data acquisition systems requiring multi-channel analog output

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure the design accommodates the high-voltage programming requirements for MTP writes if persistent data storage is utilized. Confirm interface compatibility with the host microcontroller's SPI mode settings.

Selection Notes

Select this component when eight synchronized analog channels are required with nonvolatile state retention. The 12-bit resolution and 1 LSB INL specification suit precision applications. Consider the 20-lead QFN package constraints and thermal dissipation requirements for the exposed pad during PCB layout.

Part Context

This part belongs to the MCP48CXBX4/8 family, which includes quad and octal variants with volatile or nonvolatile memory options. The 'C' indicates standard operating voltage ranges, while 'M' denotes the inclusion of MTP memory. The 'B28' suffix specifies the 12-bit resolution and octal channel count within this product line.

Replacement Considerations

MCP48CVB28-E/ML: Octal 12-bit DAC with volatile RAM instead of MTP memory.

FAQ

How is the nonvolatile memory programmed?

The MTP memory requires a high-voltage level (VIHH, typically 7.5V) on the HVC/LAT pin to successfully program the desired memory locations. Each location can be written up to 32 times.

What are the SPI interface timing limits?

The device supports SPI modes '00' and '11'. Write operations can occur at speeds up to 50 MHz, while read operations are limited to 25 MHz when operating between 2.7V and 5.5V.

Can the output gain be adjusted dynamically?

Yes, the device allows selection of unity (1x) or doubled (2x) gain. When using 2x gain, the external VREF pin voltage must be limited to a maximum of VDD/2.