High Gain, yet sensitive Amplifier

[xmind2006]

I was wondering if anyone could help me on this subject.
I have a board trace that I want to monitor the voltage/current on. Now, normally this trace has about 20mV at 4Amps running through it. What I want to do is to have a circuit to send a 5 volt interrupt signal to an AND gate that would shut the circuit down should the voltage get above 84mV. The other requirements is that I want the interrupt to be generated in less than 30uS...perferrably a lot less. The final limiting factor is that I have a 2.6, 3.3, and 5 volt power rails so a single supply amplifier would be ideal. I have been looking at amplifiers to do this, but can't seem to find one to fit the bill for this project...unless there is something that might work better for this situation.

Thanks in advance for any information.
-Issac

 

[nbucska]

Issac:
Check out <

http://www.national.com>-s

LT1712 comparator.

Plesae read FAQ240-1032
<nbucska@pc33peripherals.com> omit 33 Use subj: ENG-TIPS

 

[itsmoked]

I am baffled nbucska.. The Linear Technologies part number and the National link...??

Here's the link to the comparitor and it does look like it will do the task!:

http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1154,C1004,C1012,P2078,D1848

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

- kcress@<solve this puzzle>

 

[nbucska]

Sorry
Smoked is right -- my mistake.



Plesae read FAQ240-1032
<nbucska@pc33peripherals.com> omit 33 Use subj: ENG-TIPS

 

[itsmoked]

Hehehe I was wondering if you were up to something or just oops'd it.

Hey National will have a good comparitor too!

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

- kcress@<solve this puzzle>

 

[xmind2006]

Wow, I'm impressed about the quick responses! I guess I should be reading/watching these forums more often.

Thanks again for pointing me in the right direction.

Regards,
-Issac