STMicroelectronics Demonstration board based on the TSC102 STEVAL-ISQ010V1 STEVAL-ISQ010V1 Data Sheet
Product codes
STEVAL-ISQ010V1
DocID16754 Rev 3
15/23
TSC102
Parameter definitions
23
6.5
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.
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
a1-th
= Av. V
sense
The actual value is very slightly different, mainly due to the effects of the input offset voltage
V
V
os
and the non-linearity.
Figure 20. V
a1
vs. V
sense
theoretical and actual characteristics
The output voltage accuracy, expressed as a percentage, can be calculated with the
following formula:
following formula:
with Av = 20 V/V.
Vsense
5 mV
Ideal
Actual
Va1
Va1 accuracy for V
sense
= 5 mV
AM04510
Vsense
5 mV
Ideal
Actual
Va1
Va1 accuracy for V
sense
= 5 mV
AM04510
ΔV
a1
abs V
a1
Av
V
sense
⋅
(
)
–
(
)
Av
V
sense
⋅
-------------------------------------------------------------------------
=