MPR121QR2 Proximity Capacitive Touch Sensor I2C Controller QFN20

SKU: D21-19
In Stock
EGP 54.000
In Stock

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The MPR121 features an increased internal intelligence plus Freescale’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 autoconfiguration. 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.


• 1.71V to 3.6V operation

• 29 μA typical run current at 16 ms sampling interval

• 3 μA in scan stop mode current

• 12 electrodes/capacitance sensing inputs in which 8 are multifunctional for LED driving and GPIO

• Integrated independent autocalibration for each electrode input

• Autoconfiguration of charge current and charge time for each electrode input

• Separate touch and release trip thresholds for each electrode, providing hysteresis and electrode independence

• I2C interface, with IRQ Interrupt output to advise electrode status changes

• 3 mm x 3 mm x 0.65 mm 20 lead QFN package

• -40°C to +85°C operating temperature range


• General Purpose Capacitance Detection

• Switch Replacements

• Touch Pads, Touch Wheel, Touch Slide Bar, Touch Screen Panel

• Capacitance Near Proximity Detection Typical


• PC Peripherals

• MP3 Players

• Remote Controls

• Mobile Phones

• Lighting Controls






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