Test circuit for LT1491AN

Thread Starter

Lucas Andrade

Joined Aug 27, 2016
2
Hi,
I'm new to electronics and I have some LT1491AN, the guy who gave them them, said some are good and some are bad.
Is there any circuit that I can build to test them? Do you recommend any books or research literature to study and be possible to do the circuit?
Here is the datasheet:
Thanks
Have a nice day
 

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AlbertHall

Joined Jun 4, 2014
12,625
It all depends on what test equipment you have and how fully you want to test them. If you have an oscilloscope a quick go/no-go test would be to construct the square wave oscillator circuit from the data sheet for each opamp and verify the output frequency, amplitude, and wave shape with the 'scope.
 

Thread Starter

Lucas Andrade

Joined Aug 27, 2016
2
I don't have a oscilloscope :(

I was searching and found this schematic :


Is It possible for use this circuit and teste each channel?
Can I use +12 and -12 as a supply for the op amp?
I heve here a power supply that give me +12vdc, -12vdc, +5vdc and GND

Thanks
 

AlbertHall

Joined Jun 4, 2014
12,625
Yes and yes.
Again, it won't be a full test but it will separate out the completely non-functional ones.
Incidentally, if you are only connecting the resistors to one section of a multiple package at a time it would be best not to leave the others floating. Connect unused non-inverting inputs to ground and connect inverting inputs to the relevant output.
 
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