AT42QT1040数据手册集成电路（IC）的传感器电容式触控规格书PDF

描述 Description

Digital burst mode, charge-transfer capacitive sensor driver designed for touch-key applications. It can sense from one to four keys-one to three keys can be disabled by not installing their respective sense capacitors. The device includes all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions. The outputs are fully debounced. Only a few external parts are required for operation. The device modulates its bursts in a spread-spectrum fashion in order to heavily suppress the effects of external noise and to suppress RF emissions.

特性 Features

• Four discrete outputs indicating individual key touch
• Technology: Patented spread-spectrum charge-transfer (direct mode)
• Electrode Design: Simple self-capacitance style
• Electrode Materials: Etched copper, silver, carbon, Indium Tin Oxide (ITO)
• Electrode Substrates: PCB, FPCB, plastic films, glass
• Panel Materials: Plastic, glass, composites, painted surfaces (low particle density metallic paints possible)
• Panel Thickness: Up to 10 mm glass, 5 mm plastic (electrode size dependent)
• Key Sensitivity: Fixed key threshold, sensitivity adjusted via sample capacitor value
• Patented Adjacent Key Suppression® (AKS®) technology to enable accurate key detection
• Interface: Pin-per-key outputs, plus debug mode to observe sensor signals
• Moisture Tolerance: Increased moisture tolerance based on hardware design and firmware tuning
• Signal Processing: Self-calibration, auto drift compensation, noise filtering
• Applications: Mobile, consumer, white goods, toys, kiosks, POS
• Power: 1.8 V – 5.5 V
• Package: 20-pin 3 x 3 mm VQFN RoHS compliant

简介

AT42QT1040属于集成电路（IC）的传感器电容式触控。由制造生产的AT42QT1040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。