原标题：On Semi LC717A30UJ单芯片容性触摸/接近传感方案

　　On Semi公司的LC717A30UJ是单芯片容性触摸/接近传感方案.器件包括一个用于输入通道选择的集成的多路复用器,模数转换器,确定电容变化及模拟输出幅值的双级放大器,系统时钟,上电复位电路和所需的所有控制逻辑,以创建一个整体方案.器件提供8个电容传感输入通道,其响应时间测量为16毫秒(ms),工作电源电压2.6V至5.5 V，具有1µA的低功耗待机模式,主要用在应用于工业和消费终端产品的各种触摸或手势人机接口,如电磁炉,电冰箱,家庭娱乐系统,楼宇自动化设备,工业设备和照明控制等.本文介绍了LC717A30UJ主要特性,框图和几种应用电路,以及电容触摸评估板LC717A30UJGEVK特性,电路图,材料清单和PCB设计图.

　　The LC717A30UJ is a high performance, low cost, and highlyusable capacitance converter for electrostatic capacitive touch andproximity sensors.

　　8 capacitance-sensing input channels ideal for use in any endproducts that needs an array of switches. The LC717A30Jfacilitates a short system development time through its automaticcalibration function and minimal external components. Thedetection result (ON/OFF) for each sensor is read out by the serialinterface (I2C or SPI).

　　LC717A30UJ主要特性:

　　 Differential capacitive detection using mutual capacitance.

　　 Operates with small to large capacitance sensor input pads.

　　 Capacitance detection down to femto-Farad level.

　　 Measurement time 16 ms for 8 sensors.

　　 Minimal external components.

　　 Selectable interface : I²C or SPI.

　　 Current consumption : 0.8 mA (VDD = 5.5 V)

　　 Supply voltage : 2.6 V to 5.5 V

　　 AEC-Q100 qualified and PPAP capable.

　　LC717A30UJ典型应用:

　　 Automotive : Smart key, Control switches, Car audio, Proximity

　　 Consumer : Home Appliance, White goods, Induction Cooking

　　 Industrial : Security lock

　　 Computing : PC Peripherals, Audio Visual equipment

　　 Lighting : Remote control switches

　　图1.LC717A30UJ简化框图

　　图2.LC717A30UJ应用电路(1)

　　图3.LC717A30UJ应用电路(2):8个小电容传感器通路,4线SPI接口

　　图4.LC717A30UJ应用电路(3): 8个大电容传感器通路,I2C接口

　　电容触摸评估板LC717A30UJGEVK

　　The Electrostatic capacitive sensor kit (LC717A30UJGEVK) has several evaluation boards to evaluate the operation of various switch patterns and the communication to PC.

　　电容触摸评估板LC717A30UJGEVK特性:

　　Evaluation of 2 channel Proximity Sensor

　　Evaluation of 8 channel Touch Switch

　　Evaluation of Liquid Level Sensing

　　Evaluation of Electrode Sheet of Film Type

　　Evaluation of Customer’s Sensor Board

　　Communication Module between this Kit and PC through USB

　　电容触摸评估板LC717A30UJGEVK应用

　　Automotive

　　Consumer

　　Industrial

　　Computing

　　Lighting

　　图5.电容触摸评估板LC717A30UJGEVK外形图

　　电容触摸评估板LC717A30UJGEVK包括:

　　图6.主控制板LC717A30UJ00GEVB电路图

　　主控制板LC717A30UJ00GEVB材料清单:

　　详情请见:

LC717A30UJ-D.pdf

EVBUM2493-D.pdf