CPT112S Datasheet, PDF (1/35 Pages) Silicon Laboratories – No firmware development required

TouchXpress™ Family
CPT112S Data Sheet
The CPT112S device, part of the TouchXpress family, is designed
to quickly add capacitive touch via an I2C interface by eliminating
the firmware complexity and reducing the development time for ca-
pacitive sensing applications.
Supporting up to 12 capacitive sensor inputs in a 3 mm x 3 mm QFN package, the
CPT112S is a highly-integrated device that interfaces via I2C to the host processor to
provide a simple solution for adding capacitive touch. The device also comes with ad-
vanced features like moisture immunity, wake-on proximity, and buzzer feedback for an
enhanced user experience. No firmware development is needed, and all the capacitive
touch sense parameters can be configured using a simple GUI-based configurator. By
eliminating the need for complex firmware development, the CPT112S device enables
rapid user interface designs with minimal development effort.
The CPT112S device is ideal for a wide range of capacitive touch applications including
the following:
• Home appliances
• Instrument / Control panels
• White goods
• Medical equipment
• Consumer electronics
• Lighting control
KEY FEATURES
• No firmware development required
• Simple GUI-based configurator
• 12 Capacitive Sensor inputs with
programmable sensitivity
• Configurable multi-button slider
• I2C interface to communicate to the host
• Lowest power capacitive sense solution
• Active — 200 µA
• Sleep — 1 µA
• Wake on proximity
• Superior noise immunity: SNR up to 270:1
• Moisture immunity
• Mutually-exclusive touch qualifier
• Button touch time-out to avoid false
touches
• Buzzer output for audible touch feedback
Input
Features
Capacitive Touch Sensing
Features
Proximity Wake
Input
Touch
Qualification
Mutually-
Exclusive Touch
Qualifier
Option for a
Multi-Button
Slider
Configuration
Profile for each
Input
Baselining
Input Engine
with
12 Inputs
Low Power State Touch Time-Out
Machine
Timer
Lowest power mode with feature operational:
Active
Optimized Active
Low Power Sleep
Output
Features
I2C Output
I2C Event Buffer
Interrupt Pin
Optional Buzzer
Output
silabs.com | Smart. Connected. Energy-friendly.
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Preliminary Rev. 0.1