What does mV/V-mA mean?

Question

Hello,

I'm looking at a current sensor datasheet, it says

Sensitivity up to 2mV/mA (on the front page/Key Features)

and

sensitivity is typ. 0.08mV/V-mA @ 5V Supply (In the operating specifications)

What does this mean?

My guess:

I have the part and did some measurements

with a 5V supply

I put 4mA through it and got 6.6mV out I put 5mA through it and got 6.9mV out

so... (6.9mV-6.6mV)/(5mA-4mA) = 0.3mV/1mA = 0.3V/A ?

if I took the 0.08mV/V-mA number and multipy by the supply voltage I get

0.08mV/V-mA * 5V = 0.4mV/V-mA? which is close to 0.3mV/V-mA

Here's the datasheet:

formatting link

I think I've screwed this up, can anyone help explain this?

Thanks!

Lasse Langwadt Christensen · Accepted Answer

Den mandag den 4. maj 2015 kl. 20.20.13 UTC+2 skrev Fibo: I'm guessing, millivolt output per volt supply per milliamp current -Lasse

Jim Thompson · Answer

Fibo · Answer

ahhh.... mV/V-mA = mV/V/mA..... doh! Thanks!

DecadentLinuxUserNumeroUno · Answer

One one thousandth the figure for mV/V-A   Volt Amps.   Volt Milli-amps.  It simply allows the resultant figure to appear more intuitive.

DecadentLinuxUserNumeroUno · Answer

On Mon, 4 May 2015 12:55:33 -0700 (PDT), Fibo Gave us:

NOT per.

TIMES.

VA is Volts TIMES Amps.

V-mA is Volts TIMES milliamps.

The figure is a metered output figure described as mV of graph or bar movement per *given figure*. It is way to make the output more readable and pertinent to the values being read.

DecadentLinuxUserNumeroUno · Answer

On Mon, 04 May 2015 15:33:47 -0500, Tim Wescott  Gave us:   Thank you for articulating it well.  I was stumbling....  I think.

John S · Answer

Fibo is correct. But either way is correct.

What does mV/V-mA mean?

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