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MCP4921-E/SN

12-bit single-channel voltage DAC, SPI, rail-to-rail output, 2.7-5.5V, SOIC-8, AEC-Q100

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Manufacturer Part：

MCP4921-E/SN

Package：

SOIC-8 (4.9 x 3.9 mm)

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Description

Product Overview

The MCP4921-E/SN from Microchip Technology is a 12-Bit Single Output Voltage DAC with SPI interface in an 8-pin SOIC package. It features rail-to-rail output, external voltage reference, and selectable unity or 2x gain output, operating from 2.7V to 5.5V with very low power consumption.

Key Specifications

Resolution 12 Bit
Channels 1
Output Type Voltage, Rail-to-Rail
Settling Time 4.5 μs
INL ±2 LSB typ
DNL ±0.75 LSB max
Supply Voltage 2.7 V to 5.5 V
Operating Current 175 μA typ
Interface SPI (20 MHz)
Package SOIC-8
Temperature Range -40°C to +125°C

Features

  • 12-bit resolution with ±0.2 LSB DNL (typical)
  • Rail-to-rail output with selectable unity or 2x gain
  • SPI interface supporting 20 MHz clock
  • External voltage reference input with multiplier mode
  • Double-buffered input registers with LDAC for synchronous update
  • Very low power consumption: 175 μA typical
  • AEC-Q100 Grade 1 qualified for automotive

Applications

  • Set point or offset trimming
  • Sensor calibration and compensation
  • Motor control feedback loops
  • Portable battery-powered instruments
  • Digitally-controlled multiplier/divider

The MCP4921-E/SN is a single channel 12-bit buffered voltage output Digital-to-Analog Converter (DAC) from Microchip Technology. It uses an external voltage reference pin and SPI interface. The device provides high accuracy and low noise performance suitable for consumer and industrial applications. The resistive string architecture ensures low DNL error and fast settling time. Double-buffered input registers allow synchronous updates using the LDAC pin. The device is AEC-Q100 Grade 1 qualified, making it suitable for automotive applications.

The MCP4921-E/SN uses a resistive string DAC architecture where the 12-bit digital input code selects a tap point on a resistor divider chain between VREF and ground. The selected voltage is buffered by a rail-to-rail output amplifier with selectable gain of 1x or 2x. Data is written via SPI interface with a 16-bit command word containing configuration bits (gain selection, shutdown control) and the 12-bit DAC code. The LDAC pin allows double-buffered operation for synchronous output updates. An on-chip Power-On Reset (POR) circuit ensures the DAC output starts at a known state.

Pin Name Type Function
1 VDD Power Positive supply voltage (2.7V to 5.5V)
2 CS Input Chip select (active low)
3 SCK Input SPI serial clock input
4 SDI Input SPI serial data input
5 LDAC Input Latch DAC input (active low, synchronous update)
6 VREF Input External voltage reference input
7 VSS Ground Ground
8 VOUT Output DAC analog voltage output
  • Sensor calibration and signal compensation
  • Set point or offset trimming in control loops
  • Motor control feedback and voltage adjustment
  • Portable and battery-powered instrumentation
  • Optical communication device calibration
Manufacturer Part Number Package Notes
Microchip MCP4922-E/SN SOIC-14 Dual channel 12-bit DAC
Microchip MCP4911-E/SN SOIC-8 10-bit version, same footprint
Microchip MCP4821-E/SN SOIC-8 12-bit with internal 2.048V reference
Texas Instruments DAC8562 VSSOP-10 12-bit dual DAC with internal ref
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Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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