UM-B-114
DA14531 Development Kit Pro Hardware User Manual
User Manual
Revision 1.4
23-Apr-2020
51 of 82
© 2021 Dialog Semiconductor
8.7
Accuracy of Current Measurement Circuit
The measuring range of the current measurement circuit in DA14531 PRO-MB is 1
μΑ to 240 mA.
The circuit accuracy is measured by applying a constant current, monitoring the output with the
SmartSnippets Toolbox, and compare the outcome.
In general, the inaccuracy presented in the current measurement circuit is less than 5% (practically
less than 2%) in most of the current range. There are two areas where the inaccuracy is of the order
of 10%, that is, from 1
μA to 10 μA and from 100 μΑ to 300 μΑ (
.
Table 17: Accuracy of the Current Measurement Circuit
Current Range
Inaccuracy (%)
1
μΑ to 10 μΑ
<13%
10
μA to 100 μA
<5%
100
μA to 300 μA
<10%
300
μA to 240 mA
<5%
Figure 50: Current Measurement Circuit Response, Indicative Graph
1.E-06
1.E-05
1.E-04
1.E-03
1.E-02
1.E-01
1.E-06
1.E-05
1.E-04
1.E-03
1.E-02
1.E-01
m
easured
cu
rre
n
t
(A)
input current (A)
1.1V boost
1.8V buck
3.3V buck
