PCF8883 datasheet(11/24 Pages) NXP

Part #	PCF8883

Description	Capacitive proximity switch with auto-calibration, large voltage operating range and very low power consumption

PDF	24 Pages

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Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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11 / 24 page

PCF8883_1

Product data sheet

Rev. 01 — 16 October 2009

11 of 24

NXP Semiconductors

PCF8883

Capacitive proximity switch with auto-calibration

11. Dynamic characteristics

Table 6.

Dynamic characteristics

VDD = 5 V, CCLIN = 22 pF, CCPC = 470 nF, Tamb = +25 °C; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

CCLIN

capacitance on pin CLIN

100

CCPC

capacitance on pin CPC

X7R ceramic chip capacitor

470

2500

Nres(dig)eq equivalent digital resolution

bit

CTYPE

capacitance on pin TYPE

0.1

470

input capacitance

sensing plate and connecting cable

sensing plate and connecting cable;

Tamb = −40 °C to +85 °C;

VDD = 3.0 V

RDSon

drain-source on-state resistance

internal pull-up on input

500

Ω

tch

charge time

per sample

1.4

2.5

3.5

µs

tdch

discharge time

per sample

1.0

µs

tstartup

start-up time

until normal operation is established

0.5

pulse duration

on pin OUT; in pulse mode;

CTYPE ≥ 10 nF

2.5

ms/nF

sampling frequency

CCLIN = 0 pF

3.3

kHz

CCLIN = 22 pF (typical value)

kHz

CCLIN = 100 pF

275

tsw

switching time

at fs = 1 kHz

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