Part Name
STM8T143
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65 Pages
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MFG CO.
STMicroelectronics
STM8T143(2013) Datasheet - STMicroelectronics
STMicroelectronics
Description
The STM8T143 is a single channel, fully integrated, touch sensing capacitive sensor. It uses a ProxSense™ charge transfer capacitive acquisition method that is capable of near range proximity detection. The STM8T143 offers a state of the art capacitive sensing engine with an embedded sampling capacitor and voltage regulator allowing the overall solution cost to be reduced and improving system immunity in noisy environments. It can target a detection range up to 20 cm thanks to the electrode parasitic capacitance compensation (EPCC) feature. The EPCC automatically compensates ground parasitic capacitance sources (such as ground planes, printed circuit board tacks, and large metal objects) which significantly reduce the proximity detection range.
Features
• Touch and short range proximity detection
• Internal sampling capacitor
• On-chip integrated voltage regulator
• Automatic electrode tuning (AET)
• Electrode parasitic capacitance compensation
(EPCC)
• Dynamic calibration (DYCAL™)
• Environment control system (ECS)
• User programmable options include:
• Configurable output modes
• Configurable sensitivity levels
• Data streaming mode
• Low power management
• Operating supply voltage: 2.3 V to 5.5 V
• Supported interface:
– Individual key state output
– Single wire data interface
• Operating temperature: -40 to +85 °C
• ECOPACK®2 8-pin SO and 8-pin UFDFPN
packages
Applications
• Ear-face proximity detection for smart phone
devices
• Companion device for navigation
joystick/optical track pad
• User hand detection for Nomad equipment
(tablet PC)
• Ear-head detection for MP3/walkman ear buds
and Bluetooth headsets
• On/off touch sensing button such as GPS
system home button
• User hands detection for mouse/keyboards
• Wall switch backlight activation on user
approach and light controls on user touch
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