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Old 4th November 2005, 03:39 PM   #1
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Default how to test ic

how can i test an ic without sticking it into the circuit in which it is intended towork.in a nutshell,how to test if the ic is working or not without putting it in the ckt.
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Old 4th November 2005, 03:48 PM   #2
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There is one simple answer: you can't.

/Hugo
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Old 4th November 2005, 03:54 PM   #3
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Or more precisely, you can, but the simplest way is to plug it into the circuit.
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Old 4th November 2005, 04:17 PM   #4
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why it shouldnt work in the first place?
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Old 4th November 2005, 05:06 PM   #5
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Quote:
Originally posted by Christer
Or more precisely, you can,
Did I answer too fast?

/Hugo
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Old 4th November 2005, 05:10 PM   #6
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What are the electrical test circuits in the datasheet for?
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Old 4th November 2005, 05:13 PM   #7
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Quote:
Originally posted by Netlist

Did I answer too fast?

/Hugo

No, just too simply.


You are right in the sense that he would have to use some circuitry that actually uses the op amp (chip amp) as an amplifier, but it doesn't have to be the circuit it is intended to be used in. I guess that was my point.
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Old 4th November 2005, 05:51 PM   #8
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so what r ic testers?
they test ics but cost a hell.they r general purpose.my purpose is for amp ics only
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Old 4th November 2005, 07:45 PM   #9
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What I had in mind was just a simple DMM and a universal answer. Go figure we had to go and measure a micro-controller (which is an IC as well) with an ohmmeter.
Even measuring an LM38XX wouldn't go that way.
Looking at the price of IC testers, and if you only want to test opamps I guess building a small test circuit with +/-15V, in and outputs or just plug it in some existing circuitry should do the trick.

/Hugo
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Old 4th November 2005, 08:58 PM   #10
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Just wondering, do you ask this question in general or do you have used IC's which you want to test?

As you may have noticed the answer is yes and no.
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