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Author Topic: Did OPA687 ever come in a dip package?  (Read 1438 times)

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Offline lincolnTopic starter

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Did OPA687 ever come in a dip package?
« on: September 07, 2015, 03:59:28 am »
Hello,
   I'm modifying an Extron ADA 4 300MX distribution amp to buffer 10MHz to various test equipment in the lab, basically tying the three RGB channels together, and populating the empty BNCs.

I'm trying to figure out what op amp they used. There is no maker's mark, just the number 687J  Looking around the web, the closes that I could find was an OPA 687. Only thing is it seams that they wern't offered in a dip package. Other than that  the circuit and specs all match.

What do you think?

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« Last Edit: September 07, 2015, 06:07:44 am by lincoln »
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Offline DimitriP

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Re: Did OPA687 ever come in a dip package?
« Reply #1 on: September 07, 2015, 04:29:42 am »
My ADA 3 180 and gerry's ADA 6 300MX HV use the CLC409 
 http://gerrysweeney.com/tag/ada-6-300mx-hv/


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   If three 100  Ohm resistors are connected in parallel, and in series with a 200 Ohm resistor, how many resistors do you have? 
 

Offline lincolnTopic starter

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Re: Did OPA687 ever come in a dip package?
« Reply #2 on: September 07, 2015, 05:35:46 am »
interesting, mine was mad in '95 and is all through hole.
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