TouchXpress Family CPT112S Data Sheet The CPT112S device, part of the TouchXpress family, is designed KEY FEATURES to quickly add capacitive touch via an I2C interface by eliminating No firmware development required the firmware complexity and reducing the development time for ca- Simple GUI-based configurator pacitive sensing applications. 12 Capacitive Sensor inputs with programmable sensitivity Supporting up to 12 capacitive sensor inputs in packages as small as a 3 mm x 3 mm QFN, the CPT112S is a highly-integrated device that interfaces via I2C to the host pro- Configurable multi-button slider cessor to provide a simple solution for adding capacitive touch. The device also comes I2C interface to communicate to the host with advanced features like moisture immunity, wake-on proximity, and buzzer feedback Lowest power capacitive sense solution for an enhanced user experience. No firmware development is needed, and all the ca- Active 200 A pacitive touch sense parameters can be configured using a simple GUI-based configura- Sleep 1 A tor. By eliminating the need for complex firmware development, the CPT112S device en- Wake on proximity ables rapid user interface designs with minimal development effort. Superior noise immunity: SNR up to 270:1 The CPT112S device is ideal for a wide range of capacitive touch applications including Moisture immunity the following: Mutually-exclusive touch qualifier Medical equipment Button touch time-out to avoid false Home appliances touches Consumer electronics Instrument / Control panels Buzzer output for audible touch feedback Lighting control White goods Input Capacitive Touch Sensing Output Features Features Features Mutually- Proximity Wake Touch Exclusive Touch I2C Output I2C Event Buffer Input Qualification Qualifier Option for a Configuration Optional Buzzer Multi-Button Profile for each Baselining Interrupt Pin Output Slider Input Input Engine Low Power State Touch Time-Out with Machine Timer 12 Inputs Lowest power mode with feature operational: Active Optimized Active Low Power Sleep silabs.com Smart. Connected. Energy-friendly. Preliminary Rev. 0.2 This information applies to a product under development. Its characteristics and specifications are subject to change without notice. CPT112S Data Sheet Feature List and Ordering Information 1. Feature List and Ordering Information CP T 1 12 S A 02 G M R Tape and Reel (Optional) Package Type QFN20 (M), QSOP24 (U) Temperature Grade 40 to +85 C (G) Firmware Revision Hardware Revision Capacitive Sense Features Slider (S) Number of Capacitive Sense Inputs Interface Type GPO (0), I2C (1) TouchXpress Family Silicon Labs Xpress Product Line Figure 1.1. CPT112S Part Numbering The CPT112S has the following features: Capacitive sensing input engine with 12 inputs Post-sample touch qualification engine Configuration profile space in non-volatile memory I2C event buffer with interrupt pin to signal when new touch events have been qualified Low power state machine to minimize current draw in all use cases Capacitive proximity sensing input Buzzer output Mutually-exclusive touch qualifier Touch time-out timer Table 1.1. Product Selection Guide CPT112S-A02-GM Yes -40 to +85 C QFN20 CPT112S-A02-GU Yes -40 to +85 C QSOP24 silabs.com Smart. Connected. Energy-friendly. Preliminary Rev. 0.2 1 Ordering Part Number Pb-free (RoHS Compliant) Temperature Range Package