描述 Description

The integrated circuit PCF8883 is a capacitive proximity switch that uses a patented (EDISEN) digital method to detect a change in capacitance on a remote sensing plate. Changes in the static capacitance (as opposed to dynamic capacitance changes) are automatically compensated using continuous auto-calibration. Remote sensing plates (e.g. conductive foil) can be connected directly to the IC or remotely using a coaxial cable.

特性 Features

Dynamic proximity switch
Digital processing method
Adjustable sensitivity, can be made very high
Adjustable response time
Wide input capacitance range (10 pF to 60 pF)
Automatic calibration
A large distance (several meters) between the sensing plate and the IC is possible
Open-drain output (P-type MOSFET, external load between pin and ground)
Designed for battery powered applications (IDD = 3 μA, typical)
Output configurable as push-button, toggle, or pulse
Wide voltage operating range (VDD = 3 V to 9 V)
Large temperature operating range (Tamb = -40?°C to +85?°C)
Internal voltage regulator
Available in SOIC8 and wafer level chip-size package
Target ApplicationsProximity detection
Proximity sensing in Mobile phones
Portable entertainment units
Switch for medical applications
Switch for use in explosive environments
Vandal proof switches
Transportation: Switches in or under upholstery, leather, handles, mats, and glass
Buildings: switch in or under carpets, glass, or tiles
Sanitary applications: use of standard metal sanitary parts (e.g. tap) as switch
Hermetically sealed keys on a keyboard

應(yīng)用 Application

Proximity detection
Proximity sensing in Mobile phones
Portable entertainment units

Switch for medical applications
Switch for use in explosive environments
Vandal proof switches
Transportation: Switches in or under upholstery, leather, handles, mats, and glass
Buildings: switch in or under carpets, glass, or tiles
Sanitary applications: use of standard metal sanitary parts (e.g. tap) as switch
Hermetically sealed keys on a keyboard