The integrated circuit PCA8885TS/Q900/1 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 IC 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.
Feature
- 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 signalling over I²C-bus
- Interrupt output
- Large voltage operating range (VDD = 2.5 V to 5.5 V)
- Sleep mode (IDD< 100 nA)
- Low-power battery operation possible (IDD ∼ 10 µA)
- Operating temperature range (Tamb = -40 °C to +85 °C)
- 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
