AT42QT1245中文资料Touch Sensing/Turnkey Products数据手册Microchip规格书

描述 Description

The Microchip's AT42QT1244 and 1245 are a capacitive touch controllers with configurable 24-QTouch buttons. The Microchip QMatrix sensing algorithm (mutual capacitance) enables the user to achieve more buttons than there are pins because of this matrix layout. The device includes all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions and frequencies. UL approval and VDE compliance IEC/EN 60730 (Ed. 5.1) / IEC/EN 60335

(Ed. 5.2) for use in both class B and class C safety-critical products.



The AT42QT1245 connects via an SPI interface while the 42QT1244 features an I2C port.

特性 Features

• Number of keys: Up to 24
• Technology: Patented charge-transfer (transverse mode), with frequency hopping Key outline sizes:  6 mm × 6 mm or larger (panel thickness dependent); different sizes and shapes possible
• Key spacings: 8 mm or wider, center to center (panel thickness dependent)
• Electrode design: Two-part electrode shapes (drive-receive); wide variety of possible layouts
• PCB Layers required: One layer (with jumpers), two layers (no jumpers)
• Electrode materials: PCB, FPCB, silver or carbon on film, ITO on film
• Panel materials: Plastic, glass, composites, painted surfaces (low particle density metallic paints possible)
• Panel thickness: Up to 50 mm glass, 20 mm plastic (key size dependent)
• Key sensitivity: Individually settable via simple commands over communication interface
• Interface:  SPI (please use AT42QT1244 for I2C)
• Signal processing: Self-calibration, auto drift compensation, noise filtering, Adjacent Key Suppression® (AKS®) technology
• FMEA compliant design features
• IEC/EN/UL60730 (Ed. 3.2) / IEC/EN 60335 (Ed. 4.2) compliant design features
• UL approval
• VDE compliance
• For use in both class B and class C safety-critical products
• Detects and Reports Key Failure
• Power supply: +3 V to 5 V
• Packages:
• 32-pin 7 × 7 mm TQFP RoHS compliant
• 32-pin 5 × 5 mm QFN RoHS compliant

简介

AT42QT1245属于集成电路（IC）的传感器电容式触控。由制造生产的AT42QT1245传感器，电容式触控该系列产品提供操作电容式触摸感应传感器所需的模拟激励和测量资源，并以一种便于微控制器或类似器件使用的格式（例如 I2C 或 SPI 串行接口、UART 或简单的逻辑信号）来传递由此产生的信息。这些器件常用于人机界面应用。