| Electronics > Beginners |
| how a noob blew up his opamp |
| (1/2) > >> |
| amateur_25:
I understand in a voltage follower configuration the opamp basically tries to keep both of it's inputs the same. I have check my soldering and used a multimeter to buzz out the connnections to ensure it's right according to the schematic. So the tlc082 was powered from 5v but I did wire up 12v to it's minus input. Is there a limit as to how much voltage I can put on the inputs? |
| Fungus:
--- Quote from: amateur_25 on January 04, 2019, 09:45:38 am ---Is there a limit as to how much voltage I can put on the inputs? --- End quote --- Yes. |
| amateur_25:
The spec am looking at is the common mode input voltage? God damn it am shit at electronics. I am not good at small details Time to get my hammer out :horse: |
| mvs:
--- Quote from: amateur_25 on January 04, 2019, 10:20:36 am ---The spec am looking at is the common mode input voltage? --- End quote --- Yes, but you have also violated input voltage in absolute maximum ratings section: Vi Input voltage (2)(4) max. +/- 15V (2) All voltage values, except differential voltages, are with respect to the midpoint between VCC+ and VCC− (4) The magnitude of the input voltage must never exceed the magnitude of the supply voltage or 15 V, whichever is less. |
| Fungus:
--- Quote from: amateur_25 on January 04, 2019, 10:20:36 am ---The spec am looking at is the common mode input voltage? --- End quote --- In your case, Vdd is 5.0V so you can only apply between 0 and 5V to the inputs. --- Quote from: amateur_25 on January 04, 2019, 10:20:36 am ---God damn it am shit at electronics. I am not good at small details --- End quote --- Recognizing that is a good start. |
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