CAP1028中文资料Multiple Channel Capacitive Touch Sensor and LED Driver数据手册Microchip规格书

描述 Description

The CAP1028, which incorporates  RightTouch® technology, 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 CAP1028 also contains two (2) 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 CAP1028 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, 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 active although all LEDs may be used. Driving the WAKE/SPI_MOSI pin or communications will wake the device.

特性 Features

Programmable sensitivity
Automatic recalibration
Individual thresholds for each button
Flexible capacitive touch sense algorithm
SMBus/I2C compliant interface
Microchip BC-Link interface
SPI communications
Pin selectable communications protocol and multiple slave addresses (SMBus/I2C only)
3 µA quiescent current in deep sleep
Samples one or more channels in standby
Open drain or push-pull
Programmable blink, breathe, and dimness controls
Can be linked to capacitive touch sensors
Dedicated wake output flags touches in low power mode
System RESET pin
Available in 20-pin 4mm x 4mm RoHS compliant QFN package
Desktop and Notebook PCs
LCD Monitors
Printers
Appliances