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參數(shù)資料
| 型號(hào)： | LMV721 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 10MHz, Low Noise, Low Voltage, and Low Power Operational Amplifier |
| 中文描述： | 10MHz的，低噪聲，低電壓，低功耗運(yùn)算放大器 |
| 文件頁(yè)數(shù)： | 11/15頁(yè) |
| 文件大小： | 459K |
| 代理商： | LMV721 |
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Application Notes
(Continued)
Here is a LMV721 used as a microphone preamplifier. Since the LMV721 is a low noise and low power op amp, it makes it an
ideal candidate as a battery powered microphone preamplifier. The LMV721 is connected in an inverting configuration. Resistors,
R
= R
= 4.7k
, sets the reference half way between V
= 3V and ground. Thus, this configures the op amp for single supply
use. The gain of the preamplifier, which is 50 (34dB), is set by resistors R
= 10k
and R
= 500k
. The gain bandwidth product
for the LMV721 is 10 MHz. This is sufficient for most audio application since the audio range is typically from 20 Hz to 20kHz. A
resistor R
= 5k
is used to bias the electret microphone. Capacitors C
1
= C
2
= 4.7μF placed at the input and output of the op
amp to block out the DC voltage offset.
DS100922-44
FIGURE 11. A Battery Powered Microphone Preamplifier
www.national.com
11
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PDF描述 |
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| LMV721M7X | 10MHz, Low Noise, Low Voltage, and Low Power Operational Amplifier |
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| LMV721M5X | 10MHz, Low Noise, Low Voltage, and Low Power Operational Amplifier |
| LMV721M5 | 10MHz, Low Noise, Low Voltage, and Low Power Operational Amplifier |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMV721_06 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:10MHz, Low Noise, Low Voltage, and Low Power Operational Amplifier |
| LMV7219 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:7 nsec, 2.7V to 5V Comparator with Rail-to-Rail Output |
| LMV7219_04 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:7 nsec, 2.7V to 5V Comparator with Rail-to-Rail Output |
| LMV7219M5 | 功能描述:校驗(yàn)器 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| LMV7219M5 | 制造商:Texas Instruments 功能描述:COMPARATOR RAIL/RAIL OP POWERWISE |
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