Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss
What does mV/V-mA mean?
429 views
Skip to first unread message
Fibo
May 4, 2015, 2:20:13 PM5/4/15
to
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:
www.nve.com/Downloads/AAV003-10E_Data_Sheet.pdf
I think I've screwed this up, can anyone help explain this?
Thanks!
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:
www.nve.com/Downloads/AAV003-10E_Data_Sheet.pdf
I think I've screwed this up, can anyone help explain this?
Thanks!
Lasse Langwadt Christensen
May 4, 2015, 2:32:57 PM5/4/15
to
-Lasse
Jim Thompson
May 4, 2015, 3:06:48 PM5/4/15
to
not off some internal reference, thus is sensitive to power supply.
...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Fibo
May 4, 2015, 3:55:38 PM5/4/15
to
Tim Wescott
May 4, 2015, 4:33:51 PM5/4/15
to
The reason they're rating it in mV/mA is to sorta-kinda indicate useful
range: if you run an amp through it and you won't get 2V out, you'll get
smoke. So they want you thinking in terms of millivolts of response for
milliamps of input.
--
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
DecadentLinuxUserNumeroUno
May 4, 2015, 5:41:44 PM5/4/15
to
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
May 4, 2015, 5:45:02 PM5/4/15
to
On Mon, 4 May 2015 12:55:33 -0700 (PDT), Fibo <panf...@gmail.com> 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.
us:
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
May 4, 2015, 5:46:00 PM5/4/15
to
On Mon, 04 May 2015 15:33:47 -0500, Tim Wescott
<seemyw...@myfooter.really> Gave us:
Thank you for articulating it well. I was stumbling.... I think.
<seemyw...@myfooter.really> Gave us:
John S
May 4, 2015, 5:59:45 PM5/4/15
to
0 new messages