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參數(shù)資料
| 型號： | EVAL-ADMP401Z-FLEX |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 11/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVAL BOARD ADMP1062 FLEX |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | iMEMS® |
| 主要目的： | 音頻，MEMS 全向麥克風(fēng) |
| 嵌入式： | 否 |
| 已用 IC / 零件： | ADMP401 |
| 主要屬性： | 模擬輸出，200 歐姆阻抗 |
| 已供物品： | 板 |
ADMP401
Data Sheet
Rev. E | Page 8 of 12
APPLICATIONS INFORMATION
The ADMP401 output can be connected to a dedicated codec
microphone input (see Figure 9) or to a high input impedance
gain stage (see Figure 10). A 0.1 F ceramic capacitor placed
close to the ADMP401 supply pin is used for testing and is
recommended to adequately decouple the microphone from
noise on the power supply. A dc-blocking capacitor is required
at the output of the microphone. This capacitor creates a high-
pass filter with a corner frequency at
fC = 1/(2π × C × R)
where R is the input impedance of the codec.
A minimum value of 2.2 F is recommended in Figure 9
can be as low as 2 k at its highest PGA gain setting, which
results in a high-pass filter corner frequency at about 37 Hz.
op amp configured as a noninverting preamplifier.
CONNECTING THE ADMP401 TO A CODEC
07712-
009
LINN
LINP
MICBIAS
ADAU1761
OR
ADAU1361
2.2F
MINIMUM
VDD
GND
ADMP401
OUTPUT
CM
0.1F
Figure 9. ADMP401 Connected to the Analog Devices ADAU1761 or
ADAU1361 Codec
CONNECTING THE ADMP401 TO AN OP AMP
GAIN STAGE
1F
MINIMUM
10k
R2
1
VREF
ADA4897-1
07712-
010
VDD
GAIN = (R1 + R2)/R1
GND
ADMP401
OUTPUT
0.1F
VO
VREF
Figure 10. ADMP401 Connected to the ADA4897-1 Op Amp
SUPPORTING DOCUMENTS
Application Notes
AN-1003, Recommendations for Mounting and Connecting
Analog Devices, Inc., Bottom-Ported MEMS Microphones
AN-1068, Reflow Soldering of the MEMS Microphone
AN-1112, Microphone Specifications Explained
AN-1124, Recommendations for Sealing Analog Devices, Inc.,
Bottom-Port MEMS Microphones from Dust and Liquid
Ingress
AN-1140, Microphone Array Beamforming
Circuit Notes
CN-0207, High Performance Analog MEMS Microphone’s Simple
Interface to SigmaDSP Audio Codec
CN-0262, Low Noise Analog MEMS Microphone and Preamp
with Compression and Noise Gating
Evaluation Board User Guides
UG-126, EVAL-ADMP401Z: Bottom-Ported Analog Output MEMS
Microphone Evaluation Board
UG-278, EVAL-ADMP401Z-FLEX: Bottom-Ported Analog
Output MEMS Microphone Evaluation Board
OBSOLETE
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| EVAL-ADMP405Z | 制造商:AD 制造商全稱:Analog Devices 功能描述:Omnidirectional Microphone with Bottom Port and Analog Output |
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| EVAL-ADMP406Z-FLEX | 功能描述:BOARD EVAL FOR ADMP406Z RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:* 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電信，線路接口單元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要屬性:T1/J1/E1 LIU 次要屬性:- 已供物品:板，電源，線纜，CD 其它名稱:82EBV2081 |
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