Legacy Nxp Capacitive Touch Sensors

Product Attribute:

Applicationt: 

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Production Description:

1. General description
    The integrated circuit PCA8885 is a capacitive 8-channel touch and proximity sensor that uses a patented (EDISEN) method to detect a change in capacitance on remote sensing plates. Changes in the static capacitances (as opposed to dynamic capacitance changes) are automatically compensated using continuous auto-calibration. Remote sensing plates (for example, conductive foils) can be connected to the IC1 using coaxial cable. The eight input channels operate independently of each other. There is also a built-in option for a matrix arrangement of the sensors: interrupt generation only when two channels are activated simultaneously, suppression of additional channel outputs when two channels are already active.
 
2. Features and benefits

•  AEC-Q100 compliant for automotive applications
•  Dynamic touch and proximity sensor with 8 sensor channels
•  Support for matrix arrangement of sensors
•  Sensing plates can be connected remotely
•  Adjustable response time
•  Adjustable sensitivity

    *Continuous auto-calibration
    *Digital processing method
*Can cope with up to 6 mm of acrylic glass

•  Direct and latching switch modes
•  I²C Fast-mode Plus (Fm+) compatible interface

    *Two I²C-bus addresses
    *Cascading of two ICs possible
    * Interrupt signaling over I²C-bus

•  Interrupt output
•  Large voltage operating range (VDD = 2.5 V to 5.5 V)
•  Sleep mode (I_DD < 100 nA)
•  Low-power battery operation possible (I_DD ~ 10A)
•  Operating temperature range (T_amb =-40 to +85)

 
3. Applications

•  Replacing mechanical switches
•  Hermetically sealed keys on a keyboard
•  Switches for medical applications
•  Switches for use in explosive environments
•  Audio control: on/off, channel, volume
•  Vandal proof switches
•  Switches in or under the upholstery, leather, handles, mats, carpets, tiles, and glass
•  Use of standard metal sanitary parts (for example a tap) as switch
•  Portable communication and entertainment units
•  White goods control panel