PCF8883 datasheet(17/25 Pages) NXP

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PCF8883

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Product data sheet

Rev. 2 — 8 March 2011

17 of 25

NXP Semiconductors

PCF8883

Capacitive proximity switch with auto-calibration

interference. Pin CPC has a high-impedance and is sensitive to leakage currents.

Therefore CCPC should be a high quality foil or ceramic capacitor, for example an X7R

type.

When limiting the maximum input capacitance to 35 pF and the minimum operating

temperature to

−20 °C then the minimum operating voltage can be reduced to 2.8 V. The

main limitation when lowering the supply voltage is a reduction in the range of the Vi(CPC)

voltage, which is specified from 0.6 V to VDD − 0.3 V. Reducing the Vi(CPC) working range

is equivalent to reducing the input capacitance range. Additionally, Vi(CPC) increases with

decreasing temperature, as illustrated in Figure 13 and Figure 14. This means that it is

possible to lower the supply voltage if the minimum temperature will be raised accordingly.

For the choice of proper component values for a given application, the component

specifications in Table 5 and Table 6 must be followed.

PCF8883 Datasheet(PDF) 17 Page - NXP Semiconductors