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MCP4802-E/P

MCHPMCP4802-E/P

Microchip Technology
8 Bit Digital to Analog Converter 2 8-PDIP
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Overview

The MCP4802-E/P is a dual-channel 8-bit digital-to-analog converter with an internal voltage reference and a buffered voltage output. It operates over a wide voltage range of 2.7V to 5.5V and utilizes a standard SPI interface for easy integration with microcontrollers. Its through-hole PDIP-8 package makes it a preferred choice for prototyping and educational environments where breadboarding is required.

Why Choose This Part

The inclusion of an internal 2.048V reference simplifies circuit design by eliminating the need for an external precision source. Its dual-channel architecture in a small 8-pin package allows for independent control of two analog outputs while saving board space. With a typical settling time of 4.5us, it provides responsive performance for general-purpose control applications.

Applications

Digital Calibration
Adjusting offset and gain in analog signal chains where low-resolution tuning is sufficient.
Sensor Bias Control
Providing programmable reference voltages for sensors or comparators in industrial monitoring systems.
Motor Speed Control
Generating analog control voltages for motor drivers or variable speed drives.
Set Point Adjustment
Serving as a programmable set point in closed-loop control systems such as temperature regulators.

Key Specifications

Output Type Voltage - Buffered
Architecture String DAC
INL/DNL (LSB) +/-0.25, +/-0.2
Mounting Type Through Hole
Settling Time 4.5us (Typ)
Data Interface SPI
Number of Bits 8
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 2
Voltage - Supply, Analog 2.7V ~ 5.5V
Voltage - Supply, Digital 2.7V ~ 5.5V

Getting Started

To interface with the MCP4802-E/P, connect the CS, SCK, and SDI pins to your microcontroller's SPI peripheral. Ensure the LDAC pin is tied low for immediate output updates or pulsed for synchronized dual-channel updates. Since this is a through-hole part, it can be directly inserted into a standard solderless breadboard for rapid firmware development.

Also Consider

MCP4822-E/P MCHPMicrochip Technology - Provides 12-bit resolution for applications requiring fine-grained analog control.
MCP4902-E/P MCHPMicrochip Technology - Similar dual 8-bit DAC but uses an external voltage reference for customized output scales.