Analog Sensors
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Analog sensors provide a continuous output signal that is about the measured quantity. They operate on a transconductance principle of changing voltage or current in response to the physical stimulus they detect.
The output which is now proportional to the quantity measure would need to be processed or converted into a digital value that the microcontroller can use.
The output voltage is supplied to the input of a microcontroller and processed.
Analog sensors are supplied in several form factors, from types that look similar to transistors to plastic-type enclosures. The packaging is dependent on the value being measured.
In most cases the format for a sensor is the following:
- Input Voltage
- Ground
- Output Signal
- Signal Reference
The power supply is often a DC voltage and varies according to application and type. Ensure to consult the datasheet for specific details.
The output signal is taken with reference to ground and is proportional to the voltage supplied to the sensor.
The option to supply a signal reference or calibration value is dependent on the package or type of sensor
