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參數(shù)資料
| 型號： | LM397MFX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | Single General Purpose Voltage Comparator |
| 中文描述： | COMPARATOR, 10000 uV OFFSET-MAX, 940000 ns RESPONSE TIME, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 6/9頁 |
| 文件大?。?/td> | 199K |
| 代理商： | LM397MFX |
Application Notes
(Continued)
Input Stage
The LM397 has a bipolar input stage. The input common
mode voltage range is from 0 to (V
S
– 1.5V).
Output Stage
The LM397 has an open collector grounded-emitter NPN
output transistor for the output stage. This requires an exter-
nal pull-up resistor connected between the positive supply
voltage and the output. The external pull-up resistor should
be high enough resistance so to avoid excessive power
dissipation. In addition, the pull-up resistor should be low
enough resistance to enable the comparator to switch with
the load circuitry connected. Because it is an open collector
output stage, several comparator outputs can be connected
together to create an OR’ing function output. With an open
collector, the output can be used as a simple SPST switch to
ground.The amount of current which the output can sink is
approximately 10mA. When the maximum current limit is
reached, the output transistor will saturate and the output will
rise rapidly (Figure 4).
20022107
FIGURE 4. Output Saturation Voltage vs. Output Sink
Current
L
www.national.com
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM397MFX/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 |
| LM3985IM525 | 制造商:NATIONAL 功能描述:Pb Free |
| LM3985ITL-5.0 | 制造商:Texas Instruments 功能描述: |
| LM399 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Ultra Precision Reference |
| LM3999 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Precision Reference |
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