8 Channel Capacitive Touch Sensor with 8 LED Drivers
Datasheet
Table 2.2 Electrical Specifications (continued)
VDD = 3V to 3.6V, TA = 0°C to 100°C, all Typical values at TA = 27°C unless otherwise noted.
CHARACTERISTIC
SYMBOL
MIN
TYP
MAX
UNIT
CONDITIONS
Supply Current
ISTBY
160
210
uA
Standby state active
1 sensor monitored
No LED active
Default conditions (8 avg, 70ms
cycle time)
IDSLEEP
3
10
uA
uA
Deep Sleep state active
LEDs at 100% or 0% Duty Cycle
No communications
TA < 85°C
IDD
300
500
Average current
Capacitive Sensing Active
LEDs enabled
Capacitive Touch Sensor
50
Maximum Base
Capacitance
CBASE
pF
pF
Pad untouched
Pad touched
Detectable
Capacitive Shift
ΔCTOUCH
0.1
0
2
LED Drivers
Duty Cycle
DUTYLED
ISINK
100
24
%
Programmable
VOL = 0.4
Sinking Current
Sourcing Current
mA
mA
ISOURCE
24
VOH = VDD - 0.4
I/O Pins - SPI_CS#, RESET, WAKE / SPI_MOSI, and ALERT# pins
Output Low Voltage
Output High Voltage
VOL
VOH
0.4
V
V
ISINK_IO = 4mA
VDD
0.4
-
WAKE pin only
ISOURCE_IO = 4mA
Input High Voltage
Input Low Voltage
Leakage Current
VIH
VIL
2.0
V
V
0.8
±5
ILEAK
uA
powered or unpowered
TA < 85°C
SMDATA / BC_DATA / SPI_MSIO / SPI_MISO and SMCLK / BC_CLK / SPI_CLK pins
Output Low Voltage
Output High Voltage
VOL
VOH
0.4
V
V
ISINK_IO = 8mA
VDD
0.4
-
ISOURCE_IO = 8mA
Input High Voltage
Input Low Voltage
Leakage Current
VIH
VIL
2.0
V
V
0.8
±5
ILEAK
uA
powered or unpowered
TA < 85°C
pull-up voltage < 3.6V
Revision 1.1 (08-05-09)
SMSC CAP1088
DATA1S2HEET
SMSC [ SMSC CORPORATION ]
