Q2406 Datasheet, PDF (27/81 Pages) List of Unclassifed Manufacturers – SELF CONTAINED E GSM/GPRS 900/1800 OR 850/1900 BI BAND MODULE

WM_PRJ_Q2400_PTS_002 - 002
24th January 2003
2.11 Analog to Digital Converter
Analog to Digital converter input is provided by the WISMO Quik Q24x6 Series.
This converter is a 10 bits one, ranging from 0 to 2.8V .
Pin description
Signal
AUXV0
Pin number I/O
33
I
I/O type
Analog
Description
A/D converter
Electrical Characteristics
Parameter
Min
Resolution
10
Sampling rate
90.3
Input signal range
0
ADC Reference Accuracy
0.75
Integral Accuracy
+/- 1
Differential Accuracy
+/- 1
Input Impedance ( R )
10
Input Impedance ( C )
Max
2.8V
2
100
Unit
bits
Ksps
V
%
LSB
LSB
MΩ
nF
2.12 Audio interface
Two different microphone inputs and two different speaker outputs are
supported.
The WISMO Quik Q24x6 Series also includes an echo cancellation feature
which allows handsfree function.
2.12.1 Microphone inputs
The MIC2 inputs already include the biasing for an electret microphone
allowing an easy connection to a handset.
The MIC1 inputs do not include an internal bias. MIC1/SPK1 is then
appropriate for a hands free system or a handset with biasing external to the
module.
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