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WA_DEV_W218_PTS_002 Rev 005 Page 48 of 109
Product Technical Specification &
Customer Design Guidelines
Analog to Digital Converter
One Analog to Digital Converter input is provided by the WISMO218. It is a 10-bit resolution
converter, ranging from either 0 to 1V or 0 to 3V, depending on the general purpose input mode.
Features
The AUX-ADC0 input can be used for customer applications.
Table 14. Electrical Characteristics of ADC
Parameter
Min
Typ
Max
Unit
Resolution
-
10
-
bits
Sampling frequency
-
-
200
kHz
Input signal range
1 general purpose input
0
-
1
V
1 general purpose input in
div-by-3 mode
0
-
3
V
Integral non-linearity (INL)
-2.5
-
+2.5
bit
Differential non-linearity (DNL)
-1
-
+3
bit
Input impedance
input resistance
120
-
-
K
input capacitance
-
-
10
pF
Pin Description
Table 15. Analog to Digital Converter Pin Description
Signal
Pin Number
I/O
I/O Type
Description
AUX-ADC0
5
I
Analog
A/D converter
Caution: The AUX-ADC0 pin is ESD sensitive. It is a must to add ESD protection to this pin once it is externally
accessible.
Recommended ESD protection: AVL5M02200 from Amotech.