MPR121QR2 Datasheet PDF - NXP

The MPR121QR2 is a proximity capacitive Touch Sensor Controller. The MPR121 features an increased internal intelligence plus NXP"s second generation capacitance detection engine. Some major enhancements include an increased electrode count, a hardware configurable I²C address, an expanded filtering system with debounce and completely independent electrodes with built-in auto-configuration. The device also features a 13th simulated electrode which represents the simultaneous charging of all the electrodes connected together. When used with a touch panel or touch screen array, the 13th simulated electrode allows a greater near proximity detection distance and an increased sensing area.

● 29µA Typical run current at 16ms sampling interval

● 3µA in scan stop mode current

● 12 Electrodes/capacitance sensing inputs in which 8 are multifunctional for LED driving and GPIO

● Integrated independent auto calibration for each electrode input

● Auto configuration of charge current and charge time for each electrode input

● Separate touch and release trip thresholds for each electrode

● I²C interface, with IRQ interrupt output to advise electrode status changes

●ESD sensitive device, take proper precaution while handling the device.