TA = 25°C, V
參數(shù)資料
型號(hào): ADMP421ACEZ-RL7
廠商: Analog Devices Inc
文件頁數(shù): 10/16頁
文件大?。?/td> 0K
描述: MIC MEMS OMNI-DIR DIGITAL 5-LGA
設(shè)計(jì)資源: Stereo Digital Microphone Input Using ADAU1761 and ADMP421 (CN0078)
標(biāo)準(zhǔn)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(jí):
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(biāo)準(zhǔn)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
Data Sheet
ADMP421
Rev. D | Page 3 of 16
SPECIFICATIONS
TA = 25°C, VDD = 1.8 V, CLK = 2.4 MHz, unless otherwise noted. All minimum and maximum specifications are guaranteed. Typical
specifications are not guaranteed.
Table 1.
Parameter
Symbol
Test Conditions/Comments
Min
Typ
Max
Unit
PERFORMANCE
Directionality
Omni
Sensitivity1
1 kHz, 94 dB SPL
29
26
23
dBFS
Signal-to-Noise Ratio
SNR
20 kHz bandwidth, A-weighted
61
dBA
Equivalent Input Noise
EIN
20 kHz bandwidth, A-weighted
33
dBA SPL
Dynamic Range
Derived from EIN and maximum acoustic input
87
dB
Frequency Response2
Low frequency 3 dB point
100
Hz
High frequency 3 dB point
15
kHz
Deviation limits from flat response within
pass band
3/+2
dB
Total Harmonic Distortion
THD
105 dB SPL
3
%
Power Supply Rejection
PSR
217 Hz, 100 mV p-p square wave
superimposed on VDD = 1.8 V
80
dBFS
Maximum Acoustic Input
Peak
120
dB SPL
INPUT CHARACTERISTICS
Clock Frequency
CLK
1.0
2.43
3.3
MHz
Clock Duty Ratio
Clock frequency of 2.4 MHz or less
40
60
%
Input Voltage High
VIH
0.65 × VDD
V
Input Voltage Low
VIL
0.35 × VDD
V
OUTPUT CHARACTERISTICS
Output Voltage High
VOH
ILOAD = 0.5 mA
0.7 × VDD
VDD
V
Output Voltage Low
VOL
ILOAD = 0.5 mA
0
0.3 × VDD
V
Latency
<30
s
Wake-Up Time
From sleep mode, power on
10
ms
POWER SUPPLY
Supply Voltage
VDD
1.8
3.3
V
Supply Current
IS
Normal mode
650
A
Sleep mode4
50
A
1
Relative to the rms level of a sine wave with positive amplitude equal to 100% 1s density and negative amplitude equal to 0% 1s density.
2
3
The microphone operates at any clock frequency between 1.0 MHz and 3.3 MHz. Some specifications may not be guaranteed at frequencies other than 2.4 MHz.
4
The microphone enters sleep mode when the clock is turned off or the clock frequency is less than 1 kHz.
OBSOLETE
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