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AS3412 データシート(PDF) 17 Page - ams AG

部品番号 AS3412
部品情報  The AS3412 is a speaker driver with Ambient Noise Cancelling
PDF  84 Pages
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メーカー  AMSCO [ams AG]
ホームページ  http://www.ams.com
Logo AMSCO - ams AG

AS3412 データシート(HTML) 17 Page - ams AG

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ams Datasheet
Page 17
[v1-00] 2016-Apr-06
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AS3412 − Detailed Description
Microphone Supply
The AS3412 features an integrated microphone supply charge
pump. This charge pump provides the proper microphone
supply voltage even with a 1.8V chip supply voltage in order to
increase the sensitivity of the microphone.
Figure 18:
Microphone Supply
Therefore the integrated charge pump generates a microphone
supply voltage which is typically 2.7V. The microphone supply
voltage is also used to switch off the integrated music bypass
switch of the AS3412 is in active mode. Therefore, during
normal operation the microphone supply must not be switched
off if the TRSDA/BPL and TRSCL/BPR pins are in use.
MIC
Charge Pump
VBAT
MICS_ON
CP Bypass
MICS
Microphone
BIAS resistors
CMICS
CMICSF
RMICSF



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