Microchip Technology MCP48CMD01-E/UN

Overview

MCP48CMD01-E/UN from Microchip Technology is a single-channel, 8-bit nonvolatile memory digital-to-analog converter (DAC) with buffered voltage output, SPI interface, and ±0.1 LSb integral nonlinearity. It operates from 2.7V to 5.5V, supports internal band gap (1.214V), VDD, or external VREF as reference source, and features power-down modes with 100 kΩ or 1 kΩ pull-down resistors. It is used in sensor calibration circuits requiring stable, factory-set output at power-up.

For engineers reviewing the MCP48CMD01-E/UN datasheet, MCP48CMD01-E/UN pinout, MCP48CMD01-E/UN application, or MCP48CMD01-E/UN equivalent, key selection criteria include its MTP memory (32 write cycles, 8 GP locations), 4 µs settling time, 270 kHz –3 dB bandwidth, SPI write speed up to 50 MHz, and operation across –40°C to +125°C.

Technical Context

The MCP48CMD01-E/UN implements a resistor ladder architecture with integrated output op-amp and WiperLock™ technology for register protection. Its nonvolatile memory stores power-up values, configuration registers, and general-purpose data, programmed via 7.5V on the LAT/HVC pin.

Reference selection is flexible: internal band gap (1.214V), device VDD, or external VREF (buffered/unbuffered); gain options are 1× or 2× (2× only when VREF ≠ VDD). The SPI interface supports CPOL=0/CPHA=0 and CPOL=1/CPHA=1 modes with dedicated CS, SCK, SDI, and SDO lines.

Key Specifications

Pinout & Package

Package: 10-lead MSOP (3 mm × 3 mm) with exposed pad. Pin functions are validated per DS20006667A-page 4 and page 14.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DAC applications.

Compared with MCP48FVD01-E/UN and DAC8560IDBVR, the MCP48CMD01-E/UN uniquely delivers guaranteed power-up output from on-chip MTP without host intervention-critical for unattended or safety-critical calibration where volatile reload failure is unacceptable.

Availability

MCP48CMD01-E/UN is available at Aetrix Electronics and suitable for sensor calibration, set point trimming, and low-power instrumentation requiring stable component supply, long-term data retention, and extended temperature operation.

Supply support for MCP48CMD01-E/UN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology is a leading provider of microcontrollers, analog, and Flash-IP solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.

The MCP48CXDX family is designed for precision analog control in space-constrained embedded systems, emphasizing nonvolatile configurability, wide temperature operation, and robust SPI interfacing for calibration and trimming tasks.

FAQ

What is the maximum SPI clock frequency supported by the MCP48CMD01-E/UN?

The MCP48CMD01-E/UN supports SPI write operations up to 50 MHz and read operations up to 25 MHz. This allows rapid configuration and real-time updates in time-critical control loops. The device uses Schmitt-triggered inputs for noise immunity, and timing is validated across –40°C to +125°C. All timing parameters, including tLAT and tS, are specified under these conditions in DS20006667A.

Does the MCP48CMD01-E/UN retain its output value after power cycling?

Yes, the MCP48CMD01-E/UN retains its output value after power cycling using on-chip MTP memory. The power-up value is stored in nonvolatile memory and automatically loaded at POR/BOR. This behavior is guaranteed across 10 years at +85°C and applies to both DAC output and configuration registers. The MCP48CMD01-E/UN does not require host MCU initialization to restore function.

Can the MCP48CMD01-E/UN use an external reference voltage higher than VDD?

No, the MCP48CMD01-E/UN restricts VREF input to VSS ≤ VREF ≤ VDD per Absolute Maximum Ratings. When using external VREF in 2× gain mode, VREF must be ≤ VDD/2 to prevent saturation. The internal band gap (1.214V) and VDD are valid alternatives that avoid external component dependencies. Exceeding VDD on VREF risks permanent damage.

How many times can the MTP memory of the MCP48CMD01-E/UN be programmed?

The MTP memory of the MCP48CMD01-E/UN supports up to 32 write cycles per memory location. After the 32nd write, further attempts are ignored and the last written value is retained. This endurance is sufficient for factory calibration and rare field updates. Programming requires 7.5V on the LAT/HVC pin and is disabled during normal operation to prevent accidental writes.

What is the output impedance of the MCP48CMD01-E/UN in power-down mode?

In power-down mode, the MCP48CMD01-E/UN disconnects its output buffer and configures VOUT as high-impedance, with optional 100 kΩ or 1 kΩ pull-down to VSS. The effective output impedance exceeds 10 MΩ in high-Z state. This prevents loading of downstream circuitry and reduces system power consumption to 0.5–2.4 µA, as specified in DC Characteristics Table on DS20006667A-page 7.