PCF8883_11 Datasheet, PDF (1/25 Pages) NXP Semiconductors – Capacitive proximity switch with auto-calibration, large voltage operating

PCF8883
Capacitive proximity switch with auto-calibration, large
voltage operating range and very low power consumption
Rev. 2 — 8 March 2011
Product data sheet
1. General 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 IC¹ or remotely using a coaxial
cable.
2. Features and benefits
„ 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 (I_DD = 3 μA, typical)
„ Output configurable as push-button, toggle, or pulse
„ Wide voltage operating range (V_DD = 3 V to 9 V)
„ Large temperature operating range (T_amb = −40 °C to +85 °C)
„ Internal voltage regulator
„ Available in SOIC8 (other packages available on request for larger quantities)
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 16.