EmbeddedRelated.com
The 2026 Embedded Online Conference
MCP4921-E/P

MCHPMCP4921-E/P

Microchip Technology
12-bit single-channel SPI DAC alternative if an SPI interface is preferred over I2C.
Active3,282 in stock

Overview

The Microchip MCP4921-E/P is a 12-bit single-channel Digital-to-Analog Converter (DAC) with an SPI interface, ideal for applications requiring precise voltage output control. It features a buffered voltage output and an external reference input, offering flexibility in scaling the output range. This through-hole package makes it suitable for prototyping and educational uses.

Why Choose This Part

Engineers choose the MCP4921-E/P for its straightforward SPI interface, offering a digital alternative to I2C DACs. Its 12-bit resolution provides fine-grained control over analog voltage outputs. The inclusion of rail-to-rail output, selectable gain, and external voltage reference input enhances its versatility in various analog circuit designs.

Applications

Audio Signal Generation
Generating audio waveforms or control voltages for analog synthesizers and effects pedals due to its 12-bit resolution and buffered output.
Precision Control Systems
Providing precise analog control voltages in industrial automation, robotics, or test and measurement equipment where a controlled voltage source is needed.
Sensor Calibration
Creating accurate reference voltages for calibrating analog sensors or other data acquisition systems.
Programmable Power Supplies
Implementing digitally controlled voltage outputs in low-power programmable power supplies or voltage references.
Embedded Control Interfaces
Interfacing microcontrollers with analog circuits that require a variable voltage, such as controlling LED brightness or motor speed via an analog input.

Key Specifications

Output Type Voltage - Buffered
Architecture String DAC
INL/DNL (LSB) +/-4, +/-0.25
Mounting Type Through Hole
Settling Time 4.5us (Typ)
Data Interface SPI
Number of Bits 12
Package / Case 8-DIP (0.300", 7.62mm)
Reference Type External
Differential Output No
Operating Temperature -40degC ~ 125degC
Supplier Device Package 8-PDIP
Number of D/A Converters 1
Voltage - Supply, Analog 2.7V ~ 5.5V
Voltage - Supply, Digital 2.7V ~ 5.5V

Getting Started

To get started with the MCP4921-E/P, use a microcontroller development board such as an Arduino or a PIC-based board. Connect the 8-DIP package to a breadboard. Utilize the microcontroller's SPI peripheral to send 12-bit digital values to the DAC, configuring the output voltage according to the datasheet's communication protocol.

Also Consider

MCP4725A0T-E/CH MCHPMicrochip Technology - This is a popular 12-bit single-channel DAC with an I2C interface, offering an alternative for designs where I2C is preferred over SPI.
The 2026 Embedded Online Conference