MPR084

Freescale Semiconductor Technical Data MPR084 Rev 5, 11/2008 Product Preview Proximity Capacitive Touch Sensor Controller www.datasheet4u.com MPR084 OVERVIEW MPR084 Capacitive Touch Sensor Controller The MPR084 is an Inter-Integrated Circuit Communication (I2C) driven Capacitive Touch Sensor Controller, optimized to manage an 8-touch pad capacitive array. The device can accommodate a wide range of implementations through 3 output mechanisms, and many configurable options. Features 1.8 V to 3.6 V operation 41 µA average supply current with 1 s response time 2 µA low Standby Current Variable low power mode response time (32 ms – 4 s) Rejects unwanted multi-key detections from EMI events such as PA bursts or user handling Ongoing pad analysis and detection is not reset by EMI events Data is buffered in a FIFO for shortest access time IRQ output advises when FIFO has data System can set interrupt behavior as immediate after event, or program a minimum time between successive interrupts Current touched pad position is always available on demand for polling-based systems Sounder output can be enabled to generate key-click sound when pad is touched Two hardware selectable I2C addresses allowing two devices on a single I2C bus Configurable real-time auto calibration 5 mm x 5 mm x 1 mm 16 lead QFN package -40°C to +85°C operating temperature range Control Panels Switch Replacements Touch Pads Appliances PC Peripherals Access Controls...