INTRODUCTION

Digital potentiometer is also called "Digital Pot" in short. It is a kind of mixed signal IC, which is able to dynamically change the internal resistors through MCU like Arduino. It can be applied to applications such as LED DC dimming, linear stable voltage source, oscillator, low pass filter or differential amplifier.

In addition, with a proper design op-amp circuit, the digital pot can also be applied to change some key parameters of the circuit dynamically, such as LED DC dimming (output current), linear stable voltage source (output voltage), oscillator (frequency and amplitude), low pass filter (bandwidth) and differential amplifier (gain).This breakout employs MCP42100 internally manufactured with two individual 100K digital pot POT0 and POT1. Each pot has 256 taps with a resistor of 100K¦¸. It supports wide voltage supply (DC 2.7V - 5.5V) compatible with MCU of 3.3V and 5V. The breakout features as small size (20.0mm*18.0mm) and reserves the SO pin for multiple breakouts being configured in daisy-chain connection. If you have a I/O shield in hand, this breakout can be easily connected to it with the attached 5 pin male to male cable.

FEATURES

Low power, small dimension

Dual Digital Potentiometer

Compatible with 3.3V or 5.0V power supply

APPLICATIONS

Sound volume or tone tuning

LED DC dimmer, contrast control

Programmable voltage source, filter, differential amplifier

SPECIFICATION

Supply Voltage: 2.7¡«5.5V DC

Static Operation Current: < 1 ¦ÌA

Potentiometer Value: 100 K¦¸

Resolution: 8 bits£¬256 taps for each potentiometer

Number of Potentiometers: 2

Interface: SPI

Operation Temperature: -40¡æ¡«85¡æ

Dimension: 20.0mm*18.0mm