Touch-sensing controller integrates sounder and I²C

The MPR083/4 controllers are designed to detect the state of capacitive touch pads. Freescale Semiconductor’s MPR083 and MPR084 offer designers a cost-efficient alternative to mechanical push switches and mechanical rotary switches.

The parts use an I²C interface to communicate with a host for configuration and an interrupt signal is provided to advise the host of status changes. The MPR083/4 also include a piezo sounder drive which provides audible feedback to simulate mechanical key clicks.

The MPR08x family can be used for numerous implementations, including control panels and switch replacements. The MPR083 controls rotary and linear sliders, the MPR084 controls up to eight touch pads.

 

FEATURES 1.8V - 3.6V operation >40µA average supply current - All touch pads being monitored - 1s response time 2µA standby current Supports 8-position rotary interface or touchpad Proprietary false-touch rejection technology Continuous pad analysis and detection that is not reset by EMI events 16-pin QFN and TSSOP packages Operating temperature range: -40°C to 85°C

APPLICATIONS Access controls Appliances PC peripherals MP3 players Remote controls

 

 

 

Development boards KITMPR083EVM and KITMPR084EVM are available to members of the Future Board Club. To apply for the development board, and membership of the Board Club, go to www.my-boardclub.com/manf-offers.htm This offer is free and subject to qualification.

 

Freescale Semiconductor/MPR083/4