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MCP4821-E/P

MCHPMCP4821-E/P

Microchip Technology
Another single-channel 12-bit SPI DAC in the Microchip family; can be a cost-effective or variant option depending on availability and package.
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Overview

The MCP4821-E/P is a single-channel, 12-bit voltage output Digital-to-Analog Converter (DAC) featuring an internal voltage reference and an SPI interface. It utilizes a resistive string architecture and includes an internal output amplifier that provides a buffered voltage output, simplifying the design of precision analog circuits. This variant is provided in an 8-pin PDIP package, making it highly suitable for through-hole prototyping and legacy industrial hardware.

Why Choose This Part

The integrated 2.048V internal reference eliminates the need for external precision voltage sources, saving board space and cost. Its buffered output supports a maximum current of 24mA, and the wide operating temperature range from -40C to +125C ensures reliability in harsh environments.

Applications

Set Point and Offset Trimming
Adjusting the bias or reference point in analog signal conditioning circuits.
Sensor Calibration
Providing precise reference voltages for calibrating analog sensors in the field.
Portable Instrumentation
Utilizing the 5uA sleep mode for battery-powered handheld measurement devices.
Optical Communication Control
Calibrating laser driver circuits and optical transceiver modules.

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 Internal
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 interface with the MCP4821, connect the SPI bus pins (CS, SCK, SDI) to a microcontroller and provide a decoupling capacitor on the VDD pin (2.7V to 5.5V). The 8-pin PDIP package is breadboard-compatible, allowing for rapid prototyping with standard jumper wires and a 0.1-inch pitch layout.

Also Consider

MCP4822-E/P MCHPMicrochip Technology - Provides two 12-bit DAC channels in the same 8-pin PDIP package for designs requiring multiple analog outputs.
MCP4921-E/P MCHPMicrochip Technology - Similar 12-bit SPI DAC architecture but uses an external voltage reference instead of an internal one.
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