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參數資料
| 型號： | LMV7255 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 1.8V Low Voltage Comparator with Rail-to-Rail Input |
| 中文描述： | 1.8V的低電壓比較器的軌到軌輸入 |
| 文件頁數： | 8/11頁 |
| 文件大小： | 221K |
| 代理商： | LMV7255 |
Application Info
(Continued)
Input Stage
The LMV7251 and LMV7255 have rail-to-rail input stages.
The input common mode voltage range is from 100mV to
(V
CC
+ 100mV).
Output Stage
The LMV7251 has a push-pull CMOS output stage. Large
push-pull output drivers allows rail-to-rail output swings with
load currents in the miliampere range.
The LMV7255 has a open drain CMOS output stage. This
requires an external 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 exces-
sive power dissipation. In addition, the pull-up resistor
should be low enough resistance to enable the comparator
to switch with the load circuitry connected.
Power Supply Considerations
The LMV7251/LMV7255 are well suited for many battery-
powered applications. The LMV7251/LMV7255 can operate
from single power supply of +1.8V to +5V. The device typi-
cally consumes only 11μA with a 2.7V supply. With a high
power supply rejection ratio (PSRR) of 79 dB (typical), the
comparator is well suited for operating under conditions of a
decaying battery voltage.
Power supply decoupling is critical and improves stability.
Place decoupling capacitors 0.1μF as close as possible to
the V
+
pin. For split supply applications, place decoupling
capacitors 0.1μF on both the V
+
and V
pins. The decoupling
capacitors will help keep the comparator from oscillating
under various load conditions.
DS200057-20
DS200057-21
FIGURE 4. Inverting Configured Comparator —
LMV7255
L
www.national.com
8
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| LMV7251 | 1.8V Low Voltage Comparator with Rail-to-Rail Input |
| LMV7251M5 | 1.8V Low Voltage Comparator with Rail-to-Rail Input |
| LMV7251M5X | 1.8V Low Voltage Comparator with Rail-to-Rail Input |
| LMV7271 | Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LMV7255M WAF | 制造商:Texas Instruments 功能描述: |
| LMV7255M5 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LMV7255M5X | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.8V Low Voltage Comparator with Rail-to-Rail Input |
| LMV7255M7 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LMV7255M7X | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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