データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

TLV1018 データシート(PDF) 7 Page - Texas Instruments

部品番号 TLV1018
部品情報  AMPLIFIER FOR THREE-WIRE ANALOG ELECTRET MICROPHONES
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI - Texas Instruments

TLV1018 データシート(HTML) 7 Page - Texas Instruments

Back Button TLV1018 Datasheet HTML 3Page - Texas Instruments TLV1018 Datasheet HTML 4Page - Texas Instruments TLV1018 Datasheet HTML 5Page - Texas Instruments TLV1018 Datasheet HTML 6Page - Texas Instruments TLV1018 Datasheet HTML 7Page - Texas Instruments TLV1018 Datasheet HTML 8Page - Texas Instruments TLV1018 Datasheet HTML 9Page - Texas Instruments TLV1018 Datasheet HTML 10Page - Texas Instruments TLV1018 Datasheet HTML 11Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 12 page
background image
Measuring Noise and SNR
A-Weighted Filter
5 pF
Sound Pressure Level
Absolute
Sound
Pressure
(dB Pa)
–94 dB
Sensitivity
(dBV/Pa)
Voltage
(dBV)
Sound
Pressure
(dB SPL)
TLV1018
www.ti.com .......................................................................................................................................... SLVS664A – OCTOBER 2008 – REVISED NOVEMBER 2008
The overall noise of the TLV1018 is measured within the frequency band from 10 Hz to 22 kHz using an
A-weighted filter. The input of the TLV1018 is connected to ground with a 5-pF capacitor.
Figure 3. Noise Measurement
The signal-to-noise ratio (SNR) is measured with a 1-kHz input signal of 18 mVPP using an A-weighted filter. This
represents a sound pressure level (SPL) of 94 dBSPL. No input capacitor is connected.
The volume of sound applied to a microphone is usually stated as the pressure level with respect to the threshold
of hearing of the human ear. The sound pressure level (SPL) in decibels is defined by:
Sound pressure level (dB) = 20 log Pm/PO
Where Pm is the measured sound pressure, and PO is the threshold of hearing (20 µPa)
To calculate the resulting output voltage of the microphone for a given SPL, the sound pressure in dBSPL needs
to be converted to the absolute sound pressure in dBPa. This is the sound pressure level in decibels, which is
referred to as 1 Pascal (Pa).
The conversion is given by:
dBPa = dBSPL + 20 log 20
µPa
dBPa = dBSPL – 94 dB
Translation from absolute sound pressure level to a voltage is specified by the sensitivity of the microphone. A
conventional microphone has a sensitivity of –44 dBV/Pa.
Figure 4. dBSPL to dBV Conversion
Example: Busy traffic is 70 dBSPL
VOUT = 70 – 94 – 44 = –68 dBV
This is equivalent to 1.13 mVPP.
Copyright © 2008, Texas Instruments Incorporated
Submit Documentation Feedback
7
Product Folder Link(s): TLV1018


同様の部品番号 - TLV1018

メーカー部品番号データシート部品情報
logo
Texas Instruments
TLV1012 TI-TLV1012 Datasheet
252Kb / 12P
[Old version datasheet]   AMPLIFIER FOR HIGH-GAIN TWO-WIRE MICROPHONES
TLV1012-15YDCR TI-TLV1012-15YDCR Datasheet
252Kb / 12P
[Old version datasheet]   AMPLIFIER FOR HIGH-GAIN TWO-WIRE MICROPHONES
TLV1012 TI-TLV1012_10 Datasheet
252Kb / 12P
[Old version datasheet]   AMPLIFIER FOR HIGH-GAIN TWO-WIRE MICROPHONES
More results

同様の説明 - TLV1018

メーカー部品番号データシート部品情報
logo
Texas Instruments
LMV1032 TI1-LMV1032 Datasheet
840Kb / 14P
[Old version datasheet]   Amplifiers for 3-Wire Analog Electret Microphones
logo
National Semiconductor ...
LMV1032-06 NSC-LMV1032-06 Datasheet
793Kb / 12P
   Amplifiers for 3 Wire Analog Electret Microphones
LMV1032-06_0511 NSC-LMV1032-06_0511 Datasheet
802Kb / 12P
   Amplifiers for 3-Wire Analog Electret Microphones
logo
Texas Instruments
LMV1032 TI1-LMV1032_15 Datasheet
960Kb / 18P
[Old version datasheet]   LMV1032-25 Amplifiers for 3-Wire Analog Electret Microphones
LMV1022 TI1-LMV1022 Datasheet
612Kb / 20P
[Old version datasheet]   PDM Output Pre-Amplifier for Electret Microphones
logo
National Semiconductor ...
LMV1024 NSC-LMV1024 Datasheet
1Mb / 17P
   PDM Output with Pre-Amplifier for Electret Microphones
LMV1024 NSC-LMV1024_09 Datasheet
571Kb / 18P
   PDM Output with Pre-Amplifier for Electret Microphones
LMV1031-20 NSC-LMV1031-20 Datasheet
690Kb / 10P
   Amplifier for Internal 3-Wire Analog Microphones and External Preamplifier
logo
Texas Instruments
LMV1031 TI1-LMV1031 Datasheet
726Kb / 12P
[Old version datasheet]   Amplifier for Internal 3-Wire Analog Microphones and External Preamplifier
TLV1012 TI-TLV1012_10 Datasheet
252Kb / 12P
[Old version datasheet]   AMPLIFIER FOR HIGH-GAIN TWO-WIRE MICROPHONES
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


データシート ダウンロード

Go To PDF Page


リンク URL




プライバシーポリシー
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   リンク交換   |   メーカーリスト
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com