MCHPAT42QT1010-MAHR
Overview
The AT42QT1010-MAHR is a single-channel capacitive touch controller designed for creating reliable touch buttons and proximity sensors. It operates across a wide voltage range of 1.8V to 5.5V and features integrated signal processing to handle environmental noise and drift. The device provides a simple digital output that goes high when a touch is detected, making it an easy replacement for mechanical switches.
Why Choose This Part
The IC features self-calibration and automatic drift compensation, which ensures consistent touch sensitivity even as environmental conditions change. Its HeartBeat feature provides a pulse on the output pin to verify the sensor is operating correctly, while the ultra-low 17uA sleep current makes it suitable for battery-powered applications. The 8-UDFN package is extremely compact at 2mm x 2mm, saving significant board space in portable designs.
Applications
Key Specifications
Getting Started
To implement the sensor, connect a sampling capacitor (Cs) between the SNS and SNSK pins to define the sensitivity level. A simple digital output pin can be connected directly to any microcontroller GPIO without the need for complex software libraries. Engineers can use the Microchip EV18W42A or similar QT-series evaluation kits to test electrode patterns and overlay materials.
AT42QT1010 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Package | Stock |
|---|---|---|
| AT42QT1010-MAHR (this part) | UFDFN-8 | 28,182 |
| AT42QT1010 | 6-23 | 37,801 |
| AT42QT1010-TSHR | 6-23 | 62,727 |
