Descriptions:
The instrumentation amplifier module with AD620 as the core realizes differential amplification, single-ended ground-to-ground signal amplification, and AC weak signal amplification, which is convenient for single-chip microcomputer and PLC acquisition and analysis!
Features:
(suitable for millivolt MV level differential amplification)
1>.AD620 is not a rail-to-rail input and output op amp, that is to say, with 5V power supply, the maximum output voltage is basically equal to 3.5V, AD620 is a common chip of high-precision instrumentation amplifier, it is a military-grade chip, which is more in the instrumentation amplifier circuit. Commonly used.
2>.AD620s offset voltage is lower than the offset voltage of LM358, can effectively amplify the MV level signal as much as possible, especially the sensor with a small output voltage range (such as: 0-5MV cant be changed with LM358)
Module parameters:
1>.the power supply voltage:
If the 3-5V single-supply DC power supply (please connect the power supply to the low-voltage port to supply power to the board)
If the 6-24V single-supply DC power supply (please connect the power supply to the wide voltage port to supply power to the board)
Current output: maximum 15-20MA
2>.input signal: front-end sensor analog signal introduction
2.1>.If the sensor or signal line (excluding the power supply and ground) has only one signal line, then it is a single-ended ground signal amplification, you can directly connect the signal line to B+, G to the common ground, and at the same time A - Shorted with G.
2.2>.If the sensor is a weighing or pressur