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MPR083 Proximity Sensing Solution
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MPR083 Proximity Sensing Solution

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An Overview Study on Freescale’s Proximity Sensing: MPR083

An Overview Study on Freescale’s Proximity Sensing: MPR083

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MPR083 Proximity Sensing Solution MPR083 Proximity Sensing Solution Presentation Transcript

  • MPR083 Proximity Sensing Solution
    • Source: Freescale Semiconductor
  • Introduction
    • Purpose
      • An Overview Study on Freescale’s Proximity Sensing: MPR083
    • Outline
      • Features and Application
      • Internal Block Diagram of MPR083
      • System Connection of MPR083
      • Capacitive sensing and its application
      • Development tools and Software
    • Content
      • 14 pages
  • Key Features
    • 1.8–3.6V operation
    • 150 μA average supply current (all touch pads being monitored)
    • 10 μA standby current
    • Supports an 8-position rotary
    • Proprietary false touch rejection technology
    • Ongoing pad analysis and detection not reset by EMI events
    • IRQ output advises when FIFO has data
    • System can set interrupt behavior as immediate after event or program a minimum time between successive interrupts
    • Sounder drive provides audible feedback to simulate mechanical key clicks
    • Digital output (I2C with custom addressing)
    • 16-pin QFN and TSSOP packages
    • -40°C to +85°C operating temperature range
  • Applications
    • Appliances
    • PC Peripherals
    • Access Controls
    • MP3 Players
    • Remote Controls
    • Mobile Phones
  • Internal Block Diagram
  • Recommended System Connections
  • Proximity Sensor Selector Guide
  • Proximity Capacitor Model C = the capacitance in farads (F) A = the area of the plates in square meters (m2) d = the distance between the plates in meters (m) k = the dielectric constant of the material separating the plates ε 0= is the permittivity of free space (8.85 x 10-12 F/m)
  • Capacitive Sensing
    • E-Field devices produce a voltage inversely proportional to the change in electrode capacitance
    • E-Field device has no memory or intelligence inside
    • Capacitive sensors respond to a change in physical stimulus
    • Used in many areas of automotive, industrial and consumer
    • Most popular application today is a capacitive touch sensing
    • Enables the elimination of mechanical buttons and sliders
    • Provide immunity to mechanical wear and tear
    • Gives greater flexibility for product designers
    • Reduction of BOM costs
    Proximity Capacitive Sensing E-Field
  • Capacitive Sensing Applications
    • Touch Panel Keyboard
    • Water Level Measurement
    • Appliance Load Balancing
    • Ice Detection
    • User Presence awareness
    • Humidity Sensing
    Touch Panel Keyboard Electrodes 5 Keys, 2 Sliders, Wheel, Proximity Pad
  • Capacitive Touch Sensor Types
  • Development Tools KITMPR083EVM Description: Evaluation board to demonstrate key proximity sensor features.
    • Sample electrode board demonstrates rotational sliders
    • Machined plastic cover for front panel non-contact touch evaluation
    • Access to all 8 electrodes
    • A Graphical User Interface that gives the user the ability to set many operational parameters
    • USB Connectivity
  • Proximity Touch Sensing Software
  • Additional Resource
    • For ordering the MPR083, please click the part list or
    • Call our sales hotline
    • For additional inquires contact our technical service hotline
    • For more product information go to
      • http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MPR083