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| 型號(hào)： | ADMP441ACEZ-RL |
| 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 9-LGA |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | ADMP441 |
| 類型： | MEMS（硅） |
| 輸出類型： | 數(shù)字、I²S |
| 方向： | 全向 |
| 頻率范圍： | 60Hz ~ 15kHz |
| 靈敏度： | -26dB ±3dB |
| 信噪比： | 61dB |
| 電壓 - 額定： | 1.8 ~ 3.3V |
| 電流 - 電源： | 1.6mA |
| 端口位置： | 底部 |
| 密封等級(jí)： | 無 |
| 端子： | 表面貼裝型 |
| 尺寸/尺寸： | 4.72mm L x 3.76mm W |
| 高度（最大）： | 1.05mm |
| 形狀： | 矩形 |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | ADMP441ACEZ-RLDKR |
ADMP441
Data Sheet
Rev. B | Page 10 of 16
DIGITAL FILTER CHARACTERISTICS
The ADMP441 has an internal digital band-pass filter. A
high-pass filter eliminates unwanted low frequency signals.
A low-pass filter allows the user to scale the pass band with
the sampling frequency as well as perform required noise
reduction.
High-Pass Filter
The ADMP441 incorporates a high-pass filter to remove unwanted
dc and very low frequency components. Table 7 shows the high-
pass characteristics for a nominal sampling rate of 48 kHz. The
cutoff frequency scales with changes in sampling rate.
Table 7. High-Pass Filter Characteristics
Frequency
Attenuation
3.7 Hz
–3.0 dB
10.4 Hz
–0.5 dB
21.6 Hz
–0.1 dB
This digital filter response is in addition to the natural high-
pass response of the ADMP441 MEMS acoustic transducer that
has a 3 dB cutoff of 60 Hz.
Low-Pass Filter
The analog-to-digital converter in the ADMP441 is a single-bit,
high order, sigma-delta (Σ-Δ) running at a high oversampling
ratio. The noise shaping of the converter pushes the majority of
the noise well above the audio band and gives the microphone a
wide dynamic range. However, it does require a good quality
low-pass filter to eliminate the high frequency noise.
Figure 13 shows the response of this digital low-pass filter
included in the microphone. The pass band of the filter extends
to 0.423 × fS and, in that band, has an unnoticeable 0.04 dB of
ripple. The high frequency cutoff of 6 dB occurs at 0.5 × fS. A
48 kHz sampling rate results in a pass band of 20.3 kHz and a
half amplitude corner at 24 kHz; the stop-band attenuation of
the filter is greater than 60 dB. Note that these filter specifica-
tions scale with sampling frequency.
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
M
AG
NI
T
UDE
(
d
B)
NORMALIZED FREQUENCY (
fS)
09568-
008
Figure 13. Digital Low-Pass Filter Magnitude Response
OBSOLETE
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| ADMP441ACEZ-RL7 | 功能描述:MIC MEMS OMNI-DIR DIGITAL 9LGA RoHS:是 類別:音頻產(chǎn)品 >> 麥克風(fēng) 系列:ADMP441 產(chǎn)品目錄繪圖:SPM04xxHx(5,xH)-xB SP Series_FTPRNT-5 標(biāo)準(zhǔn)包裝:1 系列:SiSonic™ 類型:MEMS（硅） 輸出類型:模擬 方向:全向 頻率范圍:100Hz ~ 10kHz 靈敏度:-42dB ±3dB 信噪比:59dB 阻抗:100 歐姆 電壓 - 額定:1.5 ~ 3.6V 電流 - 電源:250µA 端口位置:頂部 密封等級(jí):無 端子:表面貼裝型 尺寸/尺寸:4.72mm L x 3.76mm W 高度（最大）:1.35mm 形狀:矩形 包裝:Digi-Reel® 產(chǎn)品目錄頁面:2669 (CN2011-ZH PDF) 其它名稱:423-1131-6 |
| ADMP504 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Ultralow Noise Microphone with Bottom Port and Analog Output |
| ADMP504ACEZ | 制造商:Analog Devices 功能描述:MIC MEMS OMNI-DIR 3LGA 制造商:Analog Devices 功能描述:MIC, MEMS, OMNI-DIR, 3LGA 制造商:Analog Devices 功能描述:MIC, MEMS, OMNI-DIR, 3LGA; Audio IC Case Style:LGA; No. of Pins:3; Operating Temperature Min:-40C; Operating Temperature Max:85C; MSL:MSL 5 - 48 hours; SVHC:No SVHC (19-Dec-2012); Control / Process Application:Industrial and ;RoHS Compliant: Yes |
| ADMP504ACEZ-RL | 功能描述:MIC MEMS OMNI-DIR ANALOG 3LGA RoHS:是 類別:音頻產(chǎn)品 >> 麥克風(fēng) 系列:ADMP504 產(chǎn)品目錄繪圖:SPM04xxHx(5,xH)-xB SP Series_FTPRNT-5 標(biāo)準(zhǔn)包裝:1 系列:SiSonic™ 類型:MEMS（硅） 輸出類型:模擬 方向:全向 頻率范圍:100Hz ~ 10kHz 靈敏度:-42dB ±3dB 信噪比:59dB 阻抗:100 歐姆 電壓 - 額定:1.5 ~ 3.6V 電流 - 電源:250µA 端口位置:頂部 密封等級(jí):無 端子:表面貼裝型 尺寸/尺寸:4.72mm L x 3.76mm W 高度（最大）:1.35mm 形狀:矩形 包裝:Digi-Reel® 產(chǎn)品目錄頁面:2669 (CN2011-ZH PDF) 其它名稱:423-1131-6 |
| ADMP504ACEZ-RL7 | 功能描述:MIC MEMS OMNI-DIR ANALOG 3LGA RoHS:是 類別:音頻產(chǎn)品 >> 麥克風(fēng) 系列:ADMP504 產(chǎn)品目錄繪圖:SPM04xxHx(5,xH)-xB SP Series_FTPRNT-5 標(biāo)準(zhǔn)包裝:1 系列:SiSonic™ 類型:MEMS（硅） 輸出類型:模擬 方向:全向 頻率范圍:100Hz ~ 10kHz 靈敏度:-42dB ±3dB 信噪比:59dB 阻抗:100 歐姆 電壓 - 額定:1.5 ~ 3.6V 電流 - 電源:250µA 端口位置:頂部 密封等級(jí):無 端子:表面貼裝型 尺寸/尺寸:4.72mm L x 3.76mm W 高度（最大）:1.35mm 形狀:矩形 包裝:Digi-Reel® 產(chǎn)品目錄頁面:2669 (CN2011-ZH PDF) 其它名稱:423-1131-6 |
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