NXP MPR121 Proximity Capacitive Touch Sensor
NXP MPR121 Proximity Capacitive Touch Sensor Controller features 12 electrodes with an independent calibration feature. The independent calibration simplifies designing touch applications for portable low-power electronic products. This NXP proximity capacitive touch sensor controller builds on the MPR031 proximity touch sensor, adding an updated configuration system without increasing complexity. MPR121 also includes a hardware configurable I²C address, an expanded filtering system with debounce, and independent electrodes with autoconfiguration built in. A 13th simulated electrode represents the simultaneous charging of all the electrodes connected together to allow for increased proximity detection in a touch panel touch screen array.