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NXP Semiconductors Electronic Components Datasheet

PCA8885 Datasheet

Capacitive 8-channel touch and proximity sensor

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PCA8885
Capacitive 8-channel touch and proximity sensor with
auto-calibration and very low power consumption
Rev. 4 — 13 March 2014
Product data sheet
1. General description
The integrated circuit PCA8885 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 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
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 signaling 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 A)
Operating temperature range (Tamb = 40 C to +85 C)
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 23 on page 39.


NXP Semiconductors Electronic Components Datasheet

PCA8885 Datasheet

Capacitive 8-channel touch and proximity sensor

No Preview Available !

NXP Semiconductors
PCA8885
Capacitive 8-channel touch and proximity sensor with auto-calibration
3. Applications
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
4. Ordering information
Table 1. Ordering information
Type number
Package
Name
PCA8885TS
TSSOP28
Description
plastic small outline package; 28 leads;
body width 4.4 mm
Version
PCA8885TS
4.1 Ordering options
Table 2. Ordering options
Product type number Orderable part number Sales item
(12NC)
Delivery form
PCA8885TS/Q900/1 PCA8885TS/Q900/1,1 935297377118 tape and reel, 13 inch
5. Marking
IC
revision
1
Table 3. Marking codes
Product type number
PCA8885TS/Q900/1
Marking code
PCA8885TS
PCA8885
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 13 March 2014
© NXP Semiconductors N.V. 2014. All rights reserved.
2 of 46


Part Number PCA8885
Description Capacitive 8-channel touch and proximity sensor
Maker NXP
Total Page 3 Pages
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