TA = 25°C, V
參數(shù)資料
型號(hào)： ADMP421BCEZ-RL7
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 10/16頁(yè)
文件大?。?/td> 0K
描述： MIC MEMS OMNI-DIR DGTL 5LGA
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)： 無(wú)
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
其它名稱： ADMP421BCEZ-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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