# Hall Effect Current Sensor IC Data Sheet

I'm feeling like an idiot here. I've found this great little IC that will do the job I want but I can't seem to figure out what the max voltage is that can be supplied for sensing.

The IC runs on 5Vdc and the version I want to use is the 30A size.

I'm trying to sense when a 100W RF amplifier is working. The amplifier runs on 13.8Vdc and has a standby current of about 0.5A but when it's working it jumps to 21-23A.

Being fairly new to the whole thing I was hoping someone could point out where on the data sheet it says I'm good-to-go or DON'T DO IT MAN you're going to be making magic blue smoke.

Looking at the datasheet makes me think there is no friggin way a tiny IC can handle this much juice running through it without it melting. Am I missing something? It looks like they say it needs to be wired in series with the amplifier. ACS714-DataSheet

• I've worked with the Allegro ACS71[2-4] ICs. Yes, all the current does go through the IC. – Connor Wolf Aug 7 '13 at 23:18

1.2mOhm resistance on the input gives $P = I^2 R$ = a very small number for 30 amps and 1.2mOhm