PCF8883 Capacitive Proximity Switch

DigiKey电子元器件新产品信息 > PCF8883 Capacitive Proximity Switch

            PCF8883 Capacitive Proximity Switch
                    NXP Semiconductors introduces a capacitive proximity switch with auto-calibration, large voltage operating range
    

Image of NXP Semiconductor's PCF8883 Capacitive Proximity Switch NXP Semiconductors' 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 (for example conductive foil) can be connected directly to the IC1 or remotely using a coaxial cable.

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
Available in SOIC8

Open-drain output (P-type MOSFET, external load between pin and ground)
Designed for battery powered applications (I_DD = 3 μA, (typ.))
Output configurable as push-button, toggle, or pulse
Wide voltage operating range (V_DD = 3 V to 9 V)
Large temperature operating range (T = -40°C to +85°C)
Internal voltage regulator

Applications

Proximity detection
Proximity sensing in mobile phones and portable entertainment units
Switch for medical applications
Switch for use in explosive environments
Vandal proof switches
Hermetically sealed keys on a keyboard

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 (for example tap) as switch