The reference voltage refers to the voltage value on the sensor under the condition of operating current (100μA) when the sensor is placed in a temperature field of 0 ° C (ice-water mixture). It's actually zero point voltage. Its symbol is V (0), the value is calibrated at the factory, because the temperature coefficient of the sensor S is the same, as long as the reference voltage value V (0), you can know the sensor voltage value at any temperature point, without having to divide the sensor.\"
The reference voltage generally uses a special integrated circuit, the IC has internal measures to inhibit temperature drift, and the high-precision reference voltage generator must be placed in the constant temperature tank.
Ac also has reference voltages, such as those used in the calibration of AC measuring instruments.
The sensor also has a reference voltage, which is different from the above meaning. Represents the static output value of the sensor in the standard state.
Reference voltage circuit, also known as reference voltage source, is a circuit that can provide stable output voltage when the process, power supply voltage, and temperature change. Reference voltage sources are widely used in data converters, smart sensors and power converters.
The reference voltage source is A very important part of the contemporary analog integrated circuit, which provides the reference voltage for the series voltage regulator circuit, A\/D and D\/A converter, and is also the voltage regulator power supply or excitation source for most sensors. In addition, the reference voltage source can also be used as the standard battery, the calibration standard of the instrument head and the precision current source.