MCHPCAP1203

Overview

The CAP1203 is a 3-channel capacitive touch controller designed for modern user interfaces, featuring programmable sensitivity and integrated EMI filtering. It operates over a wide 3V to 5.5V supply range and includes automatic recalibration to maintain performance across environmental changes. The device communicates via I2C/SMBus and offers a dedicated power button mode that can wake a host system from deep sleep.

Why Choose This Part

This controller provides built-in analog and digital filtering to mitigate interference from RF and system noise sources. It simplifies firmware development with hardware-level support for Multiple Button Pattern detection and Press-and-Hold features, reducing host processor overhead.

Applications

Getting Started

Engineers can evaluate this part using the CAP1203 Evaluation Board (EVB-CAP1203) or by interfacing the 8-pin TDFN package directly with an I2C-capable microcontroller. Start by configuring the sensitivity registers and calibration thresholds to match the specific overlay material and pad geometry of your PCB.

CAP1203 Family