Specifications

Product Technical Specification & Customer Design Guidelines
Interfaces
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prior written agreement.
WA_DEV_Q64_PTS_001-003 January 9, 2009
3.10 Analog to Digital Converter
Three Analog to Digital Converters inputs are provided by the Q64. Those converters
are 10 bits resolution, ranging from 0 to 2V.
3.10.1 Features
ADIN1/BAT-TEMP input can be used, typically, to monitor external temperature,
useful for safety power off in case of application over heating (for Li-Ion battery). This
input can also be used for customer application.
ADIN2, ADIN3 and ADIN4 input can be used for customer application
Electrical Characteristics of ADC
Parameter Min Typ Max Unit Remark
Resolution 10 bits
Sampling rate 216 S/s
Input signal range 0 2 V
Vref (DC Reference level) 1.15 1.20 1.25 V
Integral Accuracy 15 mV
Differential Accuracy 2.5 mV
ADIN1
1M
Ω
ADIN2
1M
Ω
ADIN3
1M
Ω
Input
impedance
to Vref.
ADIN4
1M
Ω
Multiplexed
Note that ADIN3 and ADIN 4 are multiplexed. Only one of them is available at a time.
Depending if GR Plug-in is used, the AT commands to control ADC are different.
In Q64 with GR 64 plug-in, all ADIN inputs can be directly accessed through GR AT
command, “AT*EADCREAD”.
If without GR Plug-in, “AT+ADC” is used for accessing the ADIN1 and ADIN2 directly.
For ADIN3 and ADIN4, they need to be selected which to be accessed by another AT
command, “AT+WIOM”, before accessing their ADC return values. The ADC sharing
arrangement and the selection process are shown in Figure 10 and Figure 11 below: