| Author |
Message |
sagar_echip
Joined: 29 Jan 2004
Posts: 12
|
 01 Nov 2007 7:52 how to test op amp |
|
|
|
|
how to test op-amp IC 741?
is it possible using IC tester?
|
|
| Back to top |
|
 |
aryajur
Joined: 23 Oct 2004
Posts: 716
Helped: 78
Location: Sunnyvale, USA
|
01 Nov 2007 8:33 test opamp |
|
|
|
|
| Normally IC Testers available are for digital ICs. To test 741 you can just do some basic gain tests if you have nice equipment. But best is to design some application and see if it works in that. The companies usually fully test all the EC specs before shipping the part.
|
|
| Back to top |
|
|
Google
AdSense
|
01 Nov 2007 8:33 Ads |
|
|
|
|
|
|
| Back to top |
|
|
adsraj
Joined: 07 Apr 2004
Posts: 6
|
01 Nov 2007 10:34 opamp tester |
|
|
|
|
for kind of opamp you are talking, Analog IC Testers were available, some time back, noit sure now.
Otherwise you could test some simple parameters on bread board. What you want test -- characterise the chip or just to test it is alive or dead ?
|
|
| Back to top |
|
|
mkh
Joined: 02 Jul 2007
Posts: 13
Helped: 1
|
01 Nov 2007 21:06 op amp ic 741 |
|
|
|
|
| an analog ic tester should suffice... otherwise to test it manually you need to check the cmrr and slew rate basically,and also the offset voltages and currents if you are particular. to check cmrr u may need separate circuits for common mode and difference mode signalling... to measure slew rate a high frequency square wave(1mhz) will suffice, u need to measure the tilt at the o/p.... but rather than going for these things an ic tester is simplest
|
|
| Back to top |
|
|
nguyennam
Joined: 06 Sep 2006
Posts: 459
Helped: 28
|
03 Nov 2007 18:26 how to test op amp 741 |
|
|
|
|
I have never seen any analog IC tester, but I believe there is, and it must be hard to find and expensive.
Not all of the commercial semiconductor parts are tested at factories.
In my experience, I build a simple oscillator using the IC with the basic circuit in the datasheet or any book about opamp. The output via buffer drives the LED when I have no frequency meter, and the oscillator is calculated and built for the frequency of about 1Hz, with frequency meter, the oscillator can be built with high frequency.
Once the oscillator works, then the IC is good. I have never disappointed with this way of testing op amp.
nguyennam
|
|
| Back to top |
|
|
barrybear
Joined: 22 Nov 2001
Posts: 269
Helped: 6
|
03 Nov 2007 22:49 ic 741 |
|
|
|
|
| Just how well do you want to test it . If just a quick and dirty test, build a feedback osscilator on a breadboard and scope it up to see if it is osscilating.
|
|
| Back to top |
|
|
saas123qa
Joined: 07 Feb 2005
Posts: 52
|
17 Nov 2007 5:58 test op amp |
|
|
|
|
| You can test the opamp if you make as buffer circuit ( the simplest opamp circuit) and then apply a degital input. if it gives the same reading as the input it works else it dose not work.
|
|
| Back to top |
|
|
