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參數(shù)資料
| 型號： | LMV7272TL |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 比較器 |
| 英文描述： | Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input |
| 中文描述： | COMPARATOR, 4000 uV OFFSET-MAX, PBGA8 |
| 封裝： | MICRO, SMD-8 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 494K |
| 代理商： | LMV7272TL |
Typical Applications
UNIVERSAL LOGIC LEVEL SHIFTER
The output of LMV7275 is an unconnected drain of an
NMOS device, which can be pulled up, through a resistor, to
any desired output level within the permitted power supply
range. Hence, the following simple circuit works as a univer-
sal logic level shifter, pulling up the signal to the desired
level.
POSITIVE PEAK DETECTOR
A positive peak detect circuit is basically a comparator oper-
ated in a unity gain follower configuration, with a capacitor as
a load to maintain the highest voltage. A diode is added at
the output to prevent the capacitor from discharging through
the pull-up resistor, and a 1M
resistor added in parallel to
the capacitor to provide a high impedance discharge path.
When the input V
increases, the inverting input of the
comparator follows it, thus charging the capacitor. When it
decreases, the cap discharges through the 1M
resistor.
The decay time can be modified by changing the resistor.
The output should be accessed through a follower circuit to
prevent loading.
OR’ING THE OUTPUT
Since the output is an unconnected NMOS drain, many
drains can be tied together, pulled up to V
DD
by a single
resistor to provide an output OR’ing function. If any of the
comparator outputs is pulled low the output V
O
goes down.
20064052
FIGURE 6. Logic Level Shifter
20064054
FIGURE 7. Positive Peak Detector
20064053
FIGURE 8. OR’ing the Outputs
L
www.national.com
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相關PDF資料 |
PDF描述 |
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| LMV7272TLX | Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input |
| LMV7275 | Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input |
| LMV7275MF | Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input |
| LMV7275MFX | Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input |
| LMV7275MG | Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LMV7272TL/NOPB | 功能描述:校驗器 IC RoHS:否 制造商:STMicroelectronics 產品: 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 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| LMV7272TL-NOPB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input |
| LMV7272TLX | 制造商:Texas Instruments 功能描述:Comparator Dual R-R I/P 5.5V 8-Pin uSMD T/R |
| LMV7272TLX/NOPB | 功能描述:校驗器 IC RoHS:否 制造商:STMicroelectronics 產品: 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 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| LMV7275 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input |
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