Microchip Technology MCP48CMB01-E/UN

Overview

MCP48CMB01-E/UN from Microchip Technology is a single-channel, 8-bit buffered voltage-output DAC with nonvolatile (MTP) memory, SPI interface, and ±0.1 LSb integral nonlinearity. It operates from 2.7V to 5.5V, supports internal band gap (1.214 V), external VREF, or VDD as reference, and delivers 16 µs settling time with 60 kHz −3 dB bandwidth - used in precision sensor calibration and set-point trimming circuits.

For engineers reviewing the MCP48CMB01-E/UN datasheet, MCP48CMB01-E/UN pinout, MCP48CMB01-E/UN application, or MCP48CMB01-E/UN equivalent, key selection criteria include its 32-cycle MTP programmability, LAT/HVC high-voltage programming pin, dual power-down resistor options (100 kΩ/1 kΩ), and guaranteed operation across −40°C to +125°C.

Technical Context

The MCP48CMB01-E/UN implements a resistor ladder architecture with buffered op-amp output, supporting SPI modes '00' and '11' at up to 50 MHz write speed. Its nonvolatile memory stores power-up output values, configuration registers, and general-purpose data across 8 dedicated MTP locations.

Reference selection is controlled via VRxB:VRxA bits: '10' selects VDD, '01' enables internal band gap (1.214 V), and '11' uses external VREF with optional gain ×1 or ×2 (VREF ≤ VDD/2 for ×2). Power-on/brown-out reset ensures deterministic startup with 130 µs delay to output-driven state.

Key Specifications

Pinout & Package

Package: 10-lead MSOP (3 × 3 mm) or 10-lead DFN (3 × 3 mm); exposed pad on QFN variants not applicable to MCP48CMB01-E/UN per family table (MSOP/DFN only).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP48FVB01-E/UN, the MCP48CMB01-E/UN adds field-updatable calibration storage without layout changes; versus DAC8560IDGSR, it trades resolution for integrated reference and MTP - simplifying design for cost-sensitive 8-bit industrial control.

Availability

MCP48CMB01-E/UN is available at Aetrix Electronics and suitable for sensor calibration, industrial set-point trimming, and low-power portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MCP48CMB01-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 devices, and Flash-IP solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.

The MCP48CXBXX product line delivers precision, low-power, SPI-interfaced DACs with nonvolatile memory for embedded calibration and analog control - designed specifically for space-constrained, thermally demanding applications needing deterministic startup and field-programmable behavior.

FAQ

What is the maximum SPI clock frequency supported by the MCP48CMB01-E/UN?

The MCP48CMB01-E/UN supports up to 50 MHz for write operations and 25 MHz for read operations when powered at 2.7–5.5 V. At reduced supply (1.8–2.7 V), the maximum SPI clock drops to 10 MHz. These speeds are guaranteed across the full −40°C to +125°C operating range and enable high-throughput configuration and data streaming in real-time control systems using the MCP48CMB01-E/UN.

How does the LAT/HVC pin function in the MCP48CMB01-E/UN?

The LAT/HVC pin on the MCP48CMB01-E/UN serves dual roles: as a latch signal (LAT) to update the DAC output synchronously, or as a high-voltage programming input (HVC = 7.5 V) to enable MTP writes. During normal operation, it functions as LAT; applying 7.25–7.75 V triggers MTP programming mode. The MCP48CMB01-E/UN requires this voltage only during write cycles - not continuously - and limits exposure per Microchip's specification to prevent damage.

Does the MCP48CMB01-E/UN include an internal voltage reference?

Yes, the MCP48CMB01-E/UN integrates a precision internal band gap reference of 1.214 V (typical), with ±16 ppm/°C temperature coefficient and 30 µV/mA load regulation. This reference can be selected via configuration bits and eliminates the need for external reference ICs in many calibration and trimming applications - a key differentiator of the MCP48CMB01-E/UN versus volatile-only DACs.

What power-down options are available on the MCP48CMB01-E/UN?

The MCP48CMB01-E/UN offers three power-down configurations via PDxB:PDxA bits: high-impedance output with 100 kΩ pull-down, high-impedance output with 1 kΩ pull-down, or active output. Current draw in power-down is as low as 0.56 µA (typical). This flexibility allows designers to optimize leakage current and wake-up behavior in battery-powered or safety-critical systems using the MCP48CMB01-E/UN.

Is the MCP48CMB01-E/UN pin-compatible with other devices in the MCP48CXBXX family?

Yes, the MCP48CMB01-E/UN shares identical pinout and footprint with all single-channel variants in the MCP48CXBXX family - including MCP48CVB01-E/UN (volatile) and MCP48CMB11-E/UN (10-bit). This enables drop-in resolution or memory upgrades without PCB redesign, provided the host firmware accommodates the differing bit depth or MTP access protocol - a verified compatibility confirmed in Microchip's DS20006160A family datasheet.