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Analog to Digital Converter
One Analog to Digital Converter input, AUX‐ADC0, is provided by the WISMO228 for customer
applications. It is a 10‐bit resolution converter, ranging from either 0 to 1V or 0 to 3V, depending on
the general purpose input mode.
Electrical Characteristics
The following table describes the electrical characteristics of the ADC interface.
Parameters
Resolution
Sampling frequency
1 general purpose input
Input signal range
1 general purpose input in div-by-3
mode
Integral non-linearity (INL)
Differential non-linearity (DNL)
input resistance
Input impedance
input capacitance
Pin Description
The following table provides the pin description of the Analog to Digital Converter interface.
Pin #
Signal
5
AUX-ADC0
Caution: The AUX-ADC0 pin is ESD sensitive and it is a must to add ESD protection to this pin once it is
externally accessible. The recommended ESD protection to use is the AVL5M02200 from Amotech.
WA_DEV_W228_PTS_002
Table 16. Electrical Characteristics of the ADC Interface
Table 17. Analog to Digital Converter Pin Description
I/O
I/O Type
I
Analog
A/D converter
Rev 001
Product Technical Specification &
Customer Design Guidelines
Minimum
Typical
-
10
-
-
0
-
0
-
-2.5
-
-1
-
120
-
-
-
Description
Maximum
Unit
-
bits
200
kHz
1
V
3
V
+2.5
bit
+3
bit
-
KΩ
10
pF
Page 53 of 108
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