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
计算机和计算机周边, 消费电子产品, 安全, 照明
(EN)
