AN3306

Comparison of current measuring devices

Doc ID 18182 Rev 1

7/21

Table 1 summarizes the strengths and weakness of the different current measurement

techniques under consideration.

Table 1.

Comparison of current measurement devices

Characteristic

Shunt

Current

transformer

(CT)

Hall effect

Pulse current

sensor

(di/dt)

Linear amplitude & phase

++

0

−

++

Wide range - 5 decades

0

0

+

++

Wide bandwidth

+

0

0

++

No DC saturation

++

−−

++

Low temperature coefficient

0

+

−

++

High electrical isolation

−

++

0

++

Low power consumption

−

+0

++

Output voltage

++

++

−

0

Low cost

++

0

−

+

Light weight

+

−

+++

Flexible size & shape

−−

+++