CAP1208 datasheet(11/67 Pages) MICROCHIP

11 / 67 page

8-Channel Capacitive Touch Sensor

Datasheet

 2014 Microchip Technology Inc.

DS00001570B-page 11

Table 2.2 Electrical Specifications

VDD = 3V to 5.5V, TA = 0°C to 85°C, all Typical values at TA = 25°C unless otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNIT

CONDITIONS

DC POWER

Supply Voltage

VDD

3.0

5.5

Supply Current

ISTBY_DEF

120

170

µA

Standby state active

1 sensor input monitored

Default conditions (8 avg, 70ms

cycle time)

ISTBY_LP

µA

Standby state active

1 sensor input monitored

1 avg, 140ms cycle time

IDSLEEP_3V

5TBD

µA

Deep Sleep state active

No communications

TA < 40°C

3.135 < VDD < 3.465V

IDSLEEP_5V

TBD

µA

Deep Sleep state active

No communications

TA < 40°C

VDD = 5V

IDD

500

750

µA

Capacitive Sensing Active

CAPACITIVE TOUCH SENSOR INPUTS

Maximum Base

Capacitance

CBASE

Pad untouched

Minimum Detectable

Capacitive Shift

ΔC

TOUCH

Pad touched - default conditions

Recommended Cap

Shift

ΔC

TOUCH

0.1

Pad touched - Not tested

Power Supply

Rejection

PSR

±3

±10

counts

/ V

Untouched Current Counts

Base Capacitance 5pF - 50pF

Negative Delta Counts disabled

Maximum sensitivity

All other parameters default

POWER-ON AND BROWN-OUT RESET (SEE Section 4.2, "Reset")

Power-On Reset

Voltage

VPOR

1.3

Pin States Defined

Power-On Reset

Release Voltage

VPORR

2.85

Rising VDD

Ensured by design

Brown-Out Reset

VBOR

2.8

Falling VDD

VDD Rise Rate

(ensures internal

POR signal)

SVDD

0.05

V/ms

0 to 3V in 60ms

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