Sierra Wireless WISMO218 - Manual (Page 48)

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.