Current sense resistor

Ashutosh Nahar

Other Parts Discussed in Thread: STRIKE

Hi,

I am using current sense resistor to measure current in my circuit, but i have confusion that how to chose sense resistor so that there will be not much voltage drop drop across it?

Is there any guideline regarding how to chose current sense resistor?

I am using current sense resistor to measure current across 1.2V(350mA) supply rail.

Thanks

Ashutosh

over 7 years ago

0 Guang Zhou over 7 years ago

TI__Mastermind 27560 points

Hi Ashutosh,

These are two contradicting factors - minimizing wasted power and maximizing dynamic range. It is a balance you have to strike.

There are sources available that do a much better job than me in explaining it, among them are the training videos, they are listed in the first post on this page, please click on it and see if Session 4 is helpful. http://e2e.ti.com/support/amplifiers/current-shunt-monitors/f/931/t/467332

Similar information is also extensively available in most if not all of our datasheets, for example this one http://www.ti.com/lit/ds/symlink/ina301.pdf Section 7.3.4.

Regards,

Guang-Apps CS Products

Amplifiers

Amplifiers forum

Current sense resistor