SMSC公司的CAP1088是帶LED驅動器的8路容性觸摸傳感器,包括有可編程靈敏度的8路單獨的容性觸摸傳感器,每個傳感器可自動進行重新校準,以補償環境的變化.主要應用在臺式計算機和筆記本電腦,LCD監視器,打印機和家用電器.本文介紹了CAP1088主要特性,方框圖, 系統方框圖以及容性觸摸傳感器參考設計電路圖.
8 Channel Capacitive Touch Sensor with 8 LED Drivers
The CAP1088 is a multiple channel Capacitive Touch sensor with multiple power LED drivers. It contains eight (8) individual Capacitive Touch sensor inputs with programmable sensitivity for use in touch sensor applications. Each sensor automatically recalibrates to
compensate for gradual environmental changes.
The CAP1088 also contains eight (8) LED drivers that offer full-on / off, variable rate blinking, dimness controls, and breathing. Each of the LED drivers may be linked to one of the sensors to be actuated when a touch is detected. As well, each LED driver may be individually controlled via a host controller.
The CAP1088 offers multiple power states operating at low quiescent currents.
During the Standby mode of operation, one or more Capacitive Touch Sensors are active and all LEDs may be used. If a touch is detected, then it will wake the system using the WAKE/SPI_MOSI pin.
The Deep Sleep mode of operation is the lowest power state available drawing 3uA of current. During this mode, no sensors are activethough all LEDs may be used. Driving the WAKE/SPI_MOSI pin or communications will wake the device.
CAP1088主要特性:
Eight (8) Capacitive Touch Sensor Inputs
— Programmable sensitivity
— Automatic recalibration
— Individual thresholds for each button
