Datasheet

W7ED
3
Ratings and Specifications
* ”Detected capacitance” refers to the detected capacitance value when capacitance is applied between the electrode and the ground terminal of
the touch sensor circuit.
Output Circuit Diagram
* We recommend connecting the FG terminal to a stable potential on the device’s frame ground.
Operation Chart
Detected capacitance * 25 ± 5 pF
Power supply voltage 5 VDC (-10%) to 15 VDC (+10%)
Output Open collector (max. output current: 10 mA)
Residual output voltage 0.4 V max.
Operation mode
When detecting capacitance (human touch detected): Output transistor ON
When not detecting capacitance (no human touch detected): Output transistor OFF
Current consumption 10 mA max.
Voltage influence
With rated supply voltage within a range of ±10% and a rate of change for detected capacitance within ±10%
when powered using the rated supply voltage
Temperature influence
Within an ambient temperature range when operating and a rate of change for detected capacitance within ±10%
at +23°C
Ambient temperature
When in use: -10 to 60°C (no icing or condensation)
When in storage: -20 to 70°C (no icing or condensation)
Ambient humidity 25 to 85%RH
VCC
OUT
GND
Electrode
Power
supply
Power
supply
VCC
Electrode
OUT
GND
Touch
sensor
main
circuit
FG *
Touch
sensor
main
circuit
FG terminal not provided
(W7ED-11F, W7ED-11L)
FG terminal provided
(W7ED-12F, W7ED-12L)
Capacitance detection
Detected
Not detected
Output transistor
ON
OFF