Other Parts Discussed in Thread: INA253EVM
Hello,
there are some problems with INA253-Q1 (100 mV/A module): i linked the 5 V power supply to VS and GND connectors, the current generator is linked to through a breadboard and a resistance of 10 Ω to the IS+ and IS- connectors with an output current of 0.18 A. Ref1 is connected to GND and ref2 is connected to VS. Without connecting ref1 and ref2 connectors, the output voltage is proportional to the current according to the datasheet. But, when I connect ref1 to ground it happens that power supply of the operational amplifier goes to short circuit. So, how is it possible that the sistem works without connecting both ref1 and ref2? According to the schematics in the datasheet, if the resistance between ref1 and ref2 is measured, but it isn't 100 kohms. Instead of that, I have 30 kohms. How is it possible? I attach the functional block diagram of the manual.