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ADMP404ACEZ 데이터시트(PDF) 7 Page - Analog Devices

부품명 ADMP404ACEZ
상세설명  Omnidirectional Microphone with Bottom Port and Analog Output
PDF  12 Pages
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제조업체  AD [Analog Devices]
홈페이지  http://www.analog.com
Logo AD - Analog Devices

ADMP404ACEZ 데이터시트(HTML) 7 Page - Analog Devices

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Preliminary Technical Data
ADMP404
Rev. PrH | Page 7 of 12
APPLICATIONS INFORMATION
The ADMP404 output can be connected to a dedicated codec
microphone input (see Figure 7) or to a high input impedance
gain stage (see Figure 8). A 0.1 µF ceramic capacitor (C1) at VDD
placed close to the ADMP404 supply pins is used for testing and
is recommended to adequately decouple the microphone from
noise on the power supply. A 1 µF or larger dc-blocking tantalum
capacitor (C2) is required at the output of the microphone.
CONNECTING THE ADMP404 TO A CODEC
ADAU1761
ADMP404
MIC INPUT
C2
1µF
C1
0.1µF
GND
GND
GND
VDD
OUTPUT
Figure 7. ADMP404 Connected to the Analog Devices ADAU1761 Codec
CONNECTING THE ADMP404 TO AN OP AMP GAIN
STAGE
ADMP404
R1
10k
Ω
R3
R2
GND
GND
OUTPUT
3
2
4
7
6
GND
VDD
U1
OP177
GAIN = (R2 + R3)/R3
C2
1µF
C1
0.1µF
Figure 8. ADMP404 Connected to the OP177 Op Amp



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