Opamp tester

diy didi

Member

• Oct 4, 2019

• #1

Hi
Anyone have a circuit and board layout for a jig to test opamps?
Single, dual and quad would be cool.
Thanks!!

 

crutschow

Well-Known Member

Most Helpful Member

• Oct 5, 2019

• #2

What tests do you want to do?

 

diy didi

Member

• Oct 5, 2019

• #3

Just a go, no-go test

 

crutschow

Well-Known Member

Most Helpful Member

• Oct 5, 2019

• #4

If you just want to test that it's alive, then you could set it up with two equal value resistors to give a non-inverting amp with a gain of 2.
Add plus and minus power and ground.
Apply a input voltage of 1V and check that the output is 2V.

If you want to just have an LED go/no-go, you could put a window comparator (using 1/2 of a LM339) on each output to check that it's in a narrow 2V window.

 

Arch angel

New Member

• Oct 5, 2019

• #5

Here you go, go-no-go it works great you can clean out your old drawer full of op amps.
TESTS GAIN, STABILITY, INPUT OFFSET AND BIAS CURRENT

 

Attachments

• Op Amp Tester Poptronics-1973-12-OCR-Page-0032.pdf

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ronsimpson

Well-Known Member

Most Helpful Member

• Oct 5, 2019

• #6

OP-amp test.
Add power, set the (+) input to 1/2 supply with R3,4, Set gain to -1 with R1,2, With a pot adjust the voltage.
Monitor the output voltage, very cuddly, with two LEDs. Turn the pot from + to - and see the output go from - to +.

 

crutschow

Well-Known Member

Most Helpful Member

• Oct 5, 2019

• #7

Arch angel said:

Here you go,

Click to expand...

That reference is missing the schematic.

 

Arch angel

New Member

• Oct 7, 2019

• #8

Sorry about that

 

Attachments

• 1570442780972_1570442771400_0_Screenshot_20191007-030301.png

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