User Guide
69
Application Examples
11.6.7. Potentiometer (Ratiometric)
Potentiometers and other ratiometric type sensors can be wired directly to analog
inputs.
Potentiometers are resistive devices that use a wiper arm to create a voltage
divider. Changes to resistive measurements happen as the wiper arm moves along
a resistive element.
When connecting potentiometer sensors, it is important to do the following:
Connect one end of the sensor to the
SENSOR_SUPPLY
pin, and the other end to
a
GND
pin on the CM2115.
Connect the sensor signal to an analog input.
The following shows a typical potentiometer sensor connection:
Internal to product
Sensor Voltage
Sensor Ground
Potentiometer
Analog Input
Figure 36: Potentiometer (ratiometric) sensor connection
