PCF8885 IC

PCF8885 IC
Capacitive 8-channel proximity switch with auto-calibration and very low power consumption

1.   General description

The integrated circuit PCF8885 is a capacitive 8-channel proximity switch 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

n  Dynamic proximity switch with 8 sensor channels

n  Support for matrix arrangement of sensors

n  Sensing plates can be connected remotely

n  Adjustable response time

n  Adjustable sensitivity

u Continuous auto-calibration

u Digital processing method

u Can cope with up to 6 mm of acrylic glass

n  Direct and latching switch modes

n  I2C Fast-mode Plus (Fm+) compatible interface

u Two I2C-bus addresses

u Cascading of two ICs possible

u Interrupt signaling over I2C-bus

n  Interrupt output

n  Large voltage operating range (VDD = 2.5 V to 5.5 V)

n  Sleep mode (IDD < 100 nA)

n  Low-power battery operation possible (IDD ~ 10 μA)

n  Operating temperature range (Tamb = −40 °C to +85 °C)

n  Available in TSSOP28 and SOIC28 package

3.   Applications

n  Replacing mechanical switches

n  Hermetically sealed keys on a keyboard

n  Switches for medical applications

n  Switches for use in explosive environments

n  Audio control: on/off, channel, volume

n  Sliders and wheel-switches

n  Vandal proof switches

n  Switches in or under the upholstery, leather, handles, mats, carpets, tiles and glass

n  Switches for home automation

n  Use of standard metal sanitary parts (for example a tap) as switch

n  Portable communication and entertainment units

n  White goods control panel

Click Here For PCF8885 Data Sheet

Avaiable : 20 Pcs

Harga / Price : Rp. 75.000 / Pcs

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