Definition of input offset voltage (Vos)

AN4366

4/14

DocID025330 Rev 1

1

Definition of input offset voltage (Vos)

The input offset voltage (Vos) is defined as the intersection between the linear regression

of the Vout vs. the Vsense curve with the X-axis (see Figure 2).

If Vout1 is the output voltage where Vsense = Vsense1, and if Vout2 is the output voltage

where Vsense = Vsense2, then Vos can be calculated using following equation 1:

Figure 2: Vout vs Vsense

Vout

∗Vout

Vos

Vsense2

Vsense

Vout

Vsense1

Vout_1

Vout_2