參數(shù)資料
型號: ADMP421ACEZ-RL7
廠商: Analog Devices Inc
文件頁數(shù): 2/16頁
文件大?。?/td> 0K
描述: MIC MEMS OMNI-DIR DIGITAL 5-LGA
設(shè)計資源: Stereo Digital Microphone Input Using ADAU1761 and ADMP421 (CN0078)
標準包裝: 1
系列: ADMP421
類型: MEMS(硅)
輸出類型: 數(shù)字,PDM
方向: 全向
頻率范圍: 100Hz ~ 15kHz
靈敏度: -26dB ±3dB
信噪比: 61dB
電壓 - 額定: 1.8 ~ 3.3V
電流 - 電源: 650µA
端口位置: 底部
密封等級:
端子: 表面貼裝型
尺寸/尺寸: 4.00mm L x 3.00mm W
高度(最大): 1.10mm
形狀: 矩形
包裝: 標準包裝
產(chǎn)品目錄頁面: 2826 (CN2011-ZH PDF)
配用: EVAL-ADMP421Z-FLEX-ND - BOARD EVALUATION FOR ADMP421
其它名稱: ADMP421ACEZ-RL7DKR
ADMP421
Data Sheet
Rev. D | Page 10 of 16
APPLICATIONS INFORMATION
INTERFACING WITH ANALOG DEVICES CODECS
codecs feature digital microphone inputs that support the
ADMP421 PDM output data format. See the connection
diagrams shown in Figure 12, and refer to the AN-1003
Application Note and the codecs’ respective data sheets for
more details on the digital microphone interface.
SLEEP MODE
The microphone enters sleep mode when the clock is turned off
or the clock frequency falls below 1 kHz. In sleep mode, the
microphone data output is in high impedance state and the
current consumption is less than 50 A.
POWER SAVINGS WHEN DISABLING ONE
MICROPHONE IN A MULTIMICROPHONE
APPLICATION
The ADMP421 has a unique power-saving feature when used in
systems where two or more microphones share the same clock
and/or data lines. The microphone is designed to present high
impedance on both the clock and data pins when the power
supply (VDD) pin is at 0 V or floating. This disabled microphone
presents no load to and consumes no power from other active
microphones.
SUPPORTING DOCUMENTS
Evaluation Board User Guides
UG-118, EVAL-ADMP421Z Bottom Port Digital Output MEMS
Microphone Evaluation Board
UG-183, EVAL-ADMP421Z-FLEX: Bottom-Ported Digital
Output MEMS Microphone Evaluation Board
Circuit Note
CN-0078, iMEMS Digital Microphone Simplifies the Interface to
a SigmaDSP Audio Codec
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
ADMP421
CLK
VDD
L/R SELECT
GND
DATA
0.1F
ADMP421
CLK
VDD
L/R SELECT
GND
DATA
0.1F
MICBIAS
AVDD
1.8V TO 3.3V
JACKDET/MICIN
BCLK/GPIO2
ADAU1361
OR
ADAU1761
07596-
010
DGND
AGND
Figure 12. ADAU1361 and ADAU1761 Stereo Interface Block Diagram
OBSOLETE
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