Q2406B

Manufacturer Part NumberQ2406B
ManufacturerWAVECOM
Q2406B datasheet
 


Specifications of Q2406B

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2.12.1.2 Main Microphone Inputs (MIC2)
The MIC2 inputs are differential ones. They already include the convenient
biasing for an electret microphone (0,5 mA and 2 Volts). This electret
microphone can be directly connected on these inputs. The impedance of the
microphone 2 has to be around 2kΩ. These inputs are standard ones for an
handset design while MIC1 inputs can be connected to an external headset or
a handsfree kit.
AC coupling is already embedded in the module.
Typical implementation:
Figure 3 : MIC2 inputs (differential connection)
C1 = 10pF to 33pF
C2 = C3 = C4 = 47pF to 100pF
L1 = L2 = 100nH
C1
has
to
be
the
manufacturers provide this capacitor directly soldered on the microphone.
C2 has to be very close to the WISMO Quik Q24x6 Series connector.
L1, L2, C3 and C4 has to be put near the WISMO Quik Q24x6 Series connector
and can be removed according to their environment (ground plane, shielding,
etc…). The best way is to plan all the components and to remove those which
are not necessary to filter out the TDMA noise on the audio path.
Signal
Pin #
MIC2P
46
MIC2N
48
confidential ©
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged
without prior written agreement.
Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à
des tiers sans son autorisation préalable.
WM_PRJ_Q2400_PTS_002 - 002
C3
L1
C1
C2
L2
C4
nearest
possible
to
Pin description
I/O
I/O type
I
Analog
I
Analog
24th January 2003
MIC2P
MIC2N
the
microphone.
Microphone
Description
Microphone 2 positive
input
Microphone 2 negative
input
Page : 30 / 81