Reference voltage source based on REF102B. Viscera display and modernization.
The video examines the use of the REF102B microcircuit as a reference voltage source. Taking into account the fact that the parameters were measured in a laboratory, this device can be considered as a portable voltage measure with an accuracy of 0.05%.
To add a second reference voltage, a resistive divider with a division factor of about five on high-precision resistors was used. In order not to go beyond the 2 volt range, a voltage of 1.95 volts was chosen as a starting point, and the divider was made based on the parts at hand. As a result, the division ratio is 1: 5.124, and the calculated voltage is 1.952 volts.
To avoid affecting the divider of the connected devices, a precision operational amplifier OP177F was used, connected according to the repeater circuit.
Equipment and materials used in the video:
Microcircuit REF102B, reference voltage source 10 volts;
OP177F IC, precision operational amplifier;
Soviet Resistors S2-13 with a tolerance of 0.1%;
Chinese multimeter DT-832, Digital Tester, model 832;
Universal digital voltmeter V7-38;
Electrical Measurement Laboratory of the Center for Standardization and Metrology.