monitoring current

japer

hello

been looking for a way to monitor current of a circuit
i would prefer an ic circuit where the input could be gated
ive only found the inductive type of set up is their another way
thanks for any help
japer

Dave Paton

Japer-

AC or DC? What current level? What accuracy is required?

I do this every day, but I don't know how to help without more information...

-dave

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This is not a sig. This is a duck. Quack.

Paul Baker

A common method of monitoring current is by using a current sensing resistor, this is a resistor which has a very low and precise resistance (fractions of an Ohm). The voltage difference across the resistor is measured and the current is calculated according to I=V/R.

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·1+1=10

japer

dave
a/c and d/c
as far as current value, just the feedback that the load is on or off
accuracy 2 bit resolution would be good enough.

japer

paul
this sound like a good idea it would show change in value on a loaded circuit
which would be good enough.
thanks

japer

Javalin

Look at the MAX471 and MAX472 's. I've used both quite successfully.

(www.maxim-ic.com)

james

japer

Thanks Javalin

looking at the data sheet. the 8 dip form factor is more what am looking for.
The low operating amps and flexible voltage range is a plus also.
japer.