MCHPAT42QT1110-AUR
Overview
The AT42QT1110-AUR is a dedicated capacitive touch controller designed to manage up to 11 discrete keys. Operating between 3V and 5.5V, this IC utilizes Microchip patented QTouch technology to provide robust touch sensing with integrated support for 7 PWM channels and a real-time clock. It is housed in a 32-pin TQFP package and communicates via an SPI interface for high-speed data transfer to a host microcontroller.
Why Choose This Part
This sensor features a low-power sleep mode drawing only 2uA, making it suitable for battery-powered applications. The 42 bytes of internal EEPROM allow for non-volatile storage of calibration data, while the SPI interface simplifies integration into modern digital systems. Its wide operating temperature range of -40C to +85C ensures stability in varied environmental conditions.
Applications
Getting Started
Engineers can evaluate this part using Microchip evaluation kits like the EVK1060A. Configuration is performed over the SPI bus, where designers can adjust sensitivity and response time settings. Ensure proper PCB layout by following Microchip guidelines for sensor electrode design and ground plane clearance to minimize parasitic capacitance.
