Microchip Technology MCP4911T-E/MS

Overview

MCP4911T-E/MS from Microchip Technology is a 10-bit single-channel buffered voltage-output DAC with SPI interface, rail-to-rail output amplifier, and selectable 1x/2x gain. It operates from 2.7V to 5.5V, achieves 4.5 µs settling time, supports 20 MHz SPI clock, and features external VREF input for precision scaling-used in motor control feedback loops and calibration of optical communication devices.

For engineers reviewing the MCP4911T-E/MS datasheet, MCP4911T-E/MS pinout, MCP4911T-E/MS application, or MCP4911T-E/MS equivalent, key selection criteria include guaranteed monotonicity (±0.2 LSB DNL), extended temperature operation (–40°C to +125°C), software shutdown current (5 µA max), LDAC-synchronized latching, and MSOP-8 package compatibility with analog ground isolation requirements.

Technical Context

The MCP4911T-E/MS implements a resistive string DAC architecture with double-buffered registers, enabling synchronous output updates via the LDAC pin. Its output amplifier supports rail-to-rail swing (0.01 V to VDD – 0.04 V) and configurable gain (1x or 2x), directly scaling full-scale output to VREF or 2×VREF.

It uses SPI Mode 0,0 or Mode 1,1 with Schmitt-triggered digital inputs, supports unbuffered or buffered VREF modes (165 kΩ input impedance, 7 pF capacitance), and includes an internal Power-on Reset circuit that holds VOUT in high-impedance state until first valid write command is received.

Key Specifications

Pinout & Package

Package: 8-pin MSOP (3.0 mm × 4.9 mm, 0.65 mm pitch), with exposed thermal pad internally connected to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP4912-E/MS, the MCP4911T-E/MS saves board space and reduces inter-channel crosstalk risk in single-output systems; compared with DAC8560IDGST, it delivers faster update rate and native SPI support for real-time microcontroller control-but trades off absolute precision for speed and interface flexibility.

Availability

MCP4911T-E/MS is available at Aetrix Electronics and suitable for motor control feedback loops, precision voltage reference generation, optical device calibration, and digitally-controlled multiplier applications requiring stable component supply across industrial and automotive temperature ranges.

Supply support for MCP4911T-E/MS 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 Inc. is a leading provider of microcontrollers, analog components, and Flash-IP solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.

The MCP49xx family was designed specifically for cost-sensitive, high-accuracy analog output applications requiring SPI interface, rail-to-rail output, and extended temperature operation-targeting motor control, sensor calibration, and programmable power systems.

FAQ

What is the maximum SPI clock frequency supported by the MCP4911T-E/MS?

The MCP4911T-E/MS supports SPI clock frequencies up to 20 MHz at +25°C, with timing parameters validated across the full –40°C to +125°C operating range. This allows high-speed configuration and dynamic output updates, making the MCP4911T-E/MS suitable for real-time control loops where DAC values change frequently. The device is compatible with both SPI Mode 0,0 and Mode 1,1 protocols.

Does the MCP4911T-E/MS require an external voltage reference?

Yes, the MCP4911T-E/MS requires an external voltage reference connected to the VREF pin to define its full-scale output range. It supports both buffered and unbuffered VREF modes: unbuffered mode accepts 0V to VDD input with 165 kΩ impedance, while buffered mode restricts input to ±0.04 V from rails but improves noise rejection. The MCP4911T-E/MS does not include an internal reference.

How does the LDAC pin function in the MCP4911T-E/MS?

The LDAC pin on the MCP4911T-E/MS controls synchronous latching of the DAC output: when pulled low, it transfers data from the input register to the DAC register, updating VOUT immediately. This enables coordinated updates across multiple MCP4911T-E/MS devices sharing the same LDAC signal. If unused, LDAC may be tied to VSS for CS-edge-triggered updates-no external driver required.

What is the guaranteed DC accuracy of the MCP4911T-E/MS over temperature?

The MCP4911T-E/MS guarantees ±1 LSB integral non-linearity (INL) and ±0.2 LSB differential non-linearity (DNL) across the full –40°C to +125°C operating range, as confirmed in the extended temperature electrical characteristics table. Offset error remains within ±0.02% of full-scale range, and gain error is limited to ±0.10%, ensuring predictable transfer function behavior in harsh thermal environments.

Can the MCP4911T-E/MS operate in shutdown mode while retaining SPI functionality?

Yes, the MCP4911T-E/MS supports software shutdown mode where most internal circuitry-including the output amplifier-is disabled to reduce current consumption to ≤5 µA at +125°C, yet the SPI interface remains fully active. This allows the host microcontroller to issue commands and exit shutdown without reset, enabling rapid wake-up and minimizing system-level power management overhead in battery-powered calibration modules.