Datasheet

Parameter definitions TSC103
16/26 Doc ID 16873 Rev 2
5.5 Input offset drift versus temperature
The input voltage drift versus temperature is defined as the maximum variation of V
os
with
respect to its value at 25° C over the temperature range. It is calculated as follows:
with T
min
< T
amb
< T
max
.
Figure 19. provides a graphical definition of the input offset drift versus temperature. On this
chart V
os
is always comprised in the area defined by the maximum and minimum variation of
V
os
versus T, and T = 25° C is considered to be the reference.
Figure 19. Input offset drift versus temperature (Av = 50 V/V)
5.6 Output voltage accuracy
The output voltage accuracy is the difference between the actual output voltage and the
theoretical output voltage. Ideally, the current sensing output voltage should be equal to the
input differential voltage multiplied by the theoretical gain, as in the following formula.
V
out-th
=Av.V
sense
The actual value is very slightly different, mainly due to the effects of:
● the input offset voltage V
os
,
● the non-linearity.
ΔV
os
ΔT
---------------max
V
os
T
amb
()V
os
25° C()–
T
amb
25° C–
---------------------------------------------------------------------=
-2.5
-2
-1.5
-1
-0.5
0
0.5
1
1.5
-60 -40 -20 0 20 40 60 80 100 120 140
Vos-Vos@25°C (mV)
T(°C)