CAP1088

Please consider this device

 

The CAP1088, 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 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, 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.

Features
  • Eight (8) capacitive touch sensor inputs Programmable sensitivity Automatic recalibration Individual thresholds for each button
  • Programmable sensitivity
  • Automatic recalibration
  • Individual thresholds for each button
  • Flexible capacitive touch sense algorithm
  • Multiple communication interfaces SMBus/I2C compliant interface Microchip BC-Link interface SPI communications Pin selectable communications protocol and multiple slave addresses (SMBus/I2C only)
  • SMBus/I2C compliant interface
  • Microchip BC-Link interface
  • SPI communications
  • Pin selectable communications protocol and multiple slave addresses (SMBus/I2C only)
  • Low power operation 3 µA quiescent current in deep sleep Samples one or more channels in standby
  • 3 µA quiescent current in deep sleep
  • Samples one or more channels in standby
  • Eight (8) LED driver outputs Open drain or push-pull Programmable blink, breathe, and dimness controls Can be linked to capacitive touch sensors
  • 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 24-pin 4mm x 4mm RoHS compliant QFN package
  • Desktop and Notebook PCs
  • LCD Monitors
  • Printers
  • Appliances
Parameter
Parameter Name Value Value
Product Type Proximity/Keys/Slider Proximity/Keys/Slider
Input Channels 8 8
Proximity detection Yes Yes
Measurement Principle Self Capacitance Self Capacitance
Power Modes 3 3
Interface I2C/SPI I2C/SPI
I/O, LED Drivers 8 8
Voltage Range 3.0V - 3.6V 3.0V - 3.6V
Documents
AN18.15 - PCB Design Guidelines for QFN and DQFN PackagesAppNote10/16/2014205KB
AN19.16 - Physical Design and Layout Guidelines for Capacitive Sensor SystemsAppNote04/25/20141496KB
CAP1088 8 Channel Capacitive Touch Sensor with 8 LED Drivers Data BriefProduct Briefs11/26/2009323KB
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
CAP1088-1-CP-TR0.0645000.16000024VQFN4x4x0.9mmMatte Tine3
AN18.15 LAN9221
AN19.16 CAP1088
CAP1088 8 Channel Capacitive Touch Sensor with 8 LED Drivers Data Brief CAP1088