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MPR121 Proximity Capacitive Touch Sensor Controller


Freescale Semiconductor and Digi-Key introduce MPR121 Proximity Capacitive Touch Sensor Controller


MPR121 Proximity Capacitive Touch Sensor ControllerFreescale Semiconductor's MPR121 is the second generation sensor controller after the initial release of the MPR03x series devices. The MPR121 will feature increased internal intelligence in addition to Freescale’s second generation capacitance detection engine. Some of the major additions include an increased electrode count, a hardware configurable I²C address, an expanded filtering system with debounce, and completely independent electrodes with autoconfiguration built in. The device also features a 13th simulated electrode that represents the simultaneous charging of all the electrodes connected together to allow for increased proximity detection in a touch panel or touch screen array.


Features

  • 1.71 V to 3.6 V operation
  • 29 μA supply current with 12 electrodes being monitored with 64 ms response time and IRQ enabled
  • 3 μA shutdown current
  • 12 electrodes
  • Continuous independent auto-calibration for each electrode input
  • Separate touch and release trip thresholds for each electrode, providing hysteresis and electrode independence
  • I²C interface, with optional IRQ output to advise electrode status changes
  • 3 mm x 3 mm x 0.65 mm 20 lead QFN package
  • LED driver functionality with maximum of 8 LEDs
  • -40°C to +85°C operating temperature range

Digi-Key P/N Manufacturer's P/N Description Datasheet
MPR121QR2-ND MPR121QR2 IC CTLR TOUCH SENSOR 20-QFN Datasheet

Related Parts

Digi-Key P/N Manufacturer's P/N Description Datasheet
KITMPR121EVM-ND KITMPR121EVM KIT EVALUATION FOR MPR121 Datasheet