Boncuk
New Member
Here is a cheaper solution for an instrumentation amplifier.
It uses input offset correction as well as amplifier offset correction. For high accuracy the circuit must have a symmetrical supply. The DC/DC converter delivers an insulated output voltage of -12V at 83mA. (Cost €4.70 incl. sales tax)
Using approximately 5Ω for RG the amplification factor is ~10,000. Formulas contained in the schematic.
R15 and D1 are added to prevent overvoltage on the A/D converter input.
In case the screenshot isn't clearly readable I attached a pdf file as well.
Boncuk
It uses input offset correction as well as amplifier offset correction. For high accuracy the circuit must have a symmetrical supply. The DC/DC converter delivers an insulated output voltage of -12V at 83mA. (Cost €4.70 incl. sales tax)
Using approximately 5Ω for RG the amplification factor is ~10,000. Formulas contained in the schematic.
R15 and D1 are added to prevent overvoltage on the A/D converter input.
In case the screenshot isn't clearly readable I attached a pdf file as well.
Boncuk