Parameter definitions

TSC102

12/24

Doc ID 16754 Rev 2

6

Parameter definitions

6.1

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:

6.2

Supply voltage rejection ratio (SVR)

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

that its effect can be compared with the applied differential signal. The SVR is defined by the

formula:

6.3

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

The amplification gain Av is defined as the ratio between the output voltage and the input

differential voltage.

CMR

20

–

ΔV

a1

ΔV

icm

Av

⋅

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

log

⋅

=

SVR

20

–

ΔV

a1

ΔV

cc

Av

⋅

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

log

⋅

=

V

os

V

sense1

V

sense1

V

sense2

–

V

a11

V

a12

–

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

V

out1

⋅

⎝⎠

⎛⎞

–

=

Av

V

out

V

sense

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

=