TSC1031

Parameter definitions

Doc ID 16875 Rev 2

13/26

5

Parameter definitions

5.1

Common mode rejection ratio (CMR)

The common mode rejection ratio (CMR) measures the ability of the current sensing

back to the input so that its effect can be compared with the applied differential signal. The

CMR is defined by the formula:

5.2

Supply voltage rejection ratio (SVR)

The supply voltage rejection ratio (SVR) measures the ability of the current-sensing

input so that its effect can be compared with the applied differential signal. The SVR is

defined by the formula:

5.3

The input offset voltage is defined as the intersection between the linear regression of the

calculated with the following formula.

CMR

20

–

ΔV

out

ΔV

icm

Av

⋅

------------------------------

log

⋅

=

SVR

20

–

ΔV

out

ΔV

CC

Av

⋅

------------------------------

log

⋅

=

V

os

V

sense1

V

sense1

V

sense2

–

V

out1

V

out2

–

------------------------------------------------

V

out1

⋅

⎝⎠

⎛⎞

–

=