FREESCALE MPR121QR2 Proximity Capacitive Touch Sensor Controllerc

NXP/FREESCALE

MPR121QR2

MPR121 date sheet

Product category

Proximity Capacitive Touch Sensor Controller

Application

PC Peripherals

MP3 Players

Remote Controls

Mobile Phones

Lighting Controls

Description

• 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

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