Datasheet
Device
Onboard
MICBIAS.GND
MIC.SUB.P/MIC.MAIN.P
MICBIAS1/2.OUT
R
SM
MIC.SUB.M/MIC.MAIN.M
4 1
3 2
Power Output
GND GND
1 kW
Optional
dependingon
dynamicofmicrophone
Silicon microphone
SPM0204HE5-PB
(SPM0102ND3-C)
032-037
C
SM
C
SM.P
C
SM.PG
C
SM.M
TPS65950
SWCS032E–OCTOBER 2008–REVISED JANUARY 2011
www.ti.com
Figure 6-24. Silicon Microphone Module
Table 6-20 lists the characteristics of the silicon microphone module.
Table 6-20. Silicon Microphone Module Characteristics
Parameter Test Conditions Min Typ Max Unit
Bias voltage 2.2 V
Load current 1 mA
Output noise P-weighted 20 Hz to 6.6 kHz 1.8 μV
RMS
NOTE
For other component values, see Table 15-1.
6.2.2 Stereo Differential Input
The stereo differential inputs (the MIC_MAIN_P and MIC_MAIN_M, and the MIC_SUB_P and
MIC_SUB_M terminals) can be amplified by the microphone amplification stages. The amplification stage
outputs are connected to the two ADC inputs.
6.2.3 Headset Differential Input
The headset differential inputs (the HSMICP and HSMICM terminals) can be amplified by the microphone
amplification stage. The amplification stage outputs are connected to the ADC input.
90 Audio/Voice Module Copyright © 2008–2011, Texas Instruments Incorporated
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