Parameter definitions

TSC103

10/23

Doc ID 16873 Rev 1

4

Parameter definitions

4.1

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:

4.2

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:

4.3

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

⋅

⎝⎠

⎛⎞

–

=