CPT212B-A01-GM Silicon Labs

TouchXpress Family CPT212B Data Sheet The CPT212B device, part of the TouchXpress family, is designed KEY FEATURES to quickly add capacitive touch via an I2C interface by eliminating the firmware complexity and reducing the development time for ca- No firmware development required pacitive sensing applications. Simple GUI-based configurator 12 Capacitive Sensor inputs with Supporting up to 12 capacitive sensor inputs in packages as small as a 3 mm x 3 mm programmable sensitivity QFN, the CPT212B is a highly-integrated device that interfaces via I2C to the host pro- I2C interface to communicate to and cessor to provide a simple solution for adding capacitive touch. The device also comes configure from 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 CPT212B device en- Wake on proximity ables rapid user interface designs with minimal development effort. Superior noise immunity: SNR up to 270:1 The CPT212B device is ideal for a wide range of capacitive touch applications including Moisture immunity the following: Mutually-exclusive touch qualifier Medical equipment Home appliances Buzzer output for audible touch feedback Consumer electronics Instrument / Control panels 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 Input Engine Configuration Optional Buzzer with Profile for each Baselining Interrupt Pin Output 12 Inputs Input Low Power State Machine Lowest power mode with feature operational: Active Optimized Active Low Power Sleep silabs.com Building a more connected world. Rev. 1.1 CPT212B Data Sheet Feature List and Ordering Information 1. Feature List and Ordering Information CP T 2 12 B A 01 G M R Tape and Reel (Optional) Package Type QFN20 (M) Temperature Grade 40 to +85 C (G) Firmware Revision Hardware Revision Capacitive Sense Features Button (B) Number of Capacitive Sense Inputs Interface Type GPO (0), I2C (1), Configuration I2C (2) TouchXpress Family Silicon Labs Xpress Product Line Figure 1.1. CPT212B Part Numbering The CPT212B 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 Configuration loading with both the dedicated configuration interface and through the I2C interface Low power state machine to minimize current draw in all use cases Capacitive proximity sensing input Buzzer output Mutually-exclusive touch qualifier Table 1.1. Product Selection Guide CPT212B-A01-GM Yes Yes -40 to +85 C QFN20 See