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LTC1442

更新时间： 2024-11-19 22:57:35
品牌 Logo 应用领域
凌特 - Linear 比较器
页数 文件大小 规格书
12页 271K
描述
Ultralow Power Single/Dual Comparator with Reference

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中文翻译

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LTC1442 数据手册

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LTC1440/LTC1441/LTC1442  
Ultralow Power Single/Dual  
Comparator with Reference  
U
FEATURES  
DESCRIPTION  
The LTC®1440/LTC1441/LTC1442 are ultralow power  
single and dual comparators with built-in references. The  
comparators feature less than 3.7µA supply current over  
temperature (LTC1440), a 1.182V ±1% reference, pro-  
grammablehysteresis(LTC1440/LTC1442)andTTL/CMOS  
outputsthatsinkandsourcecurrent. Thereferenceoutput  
can drive a bypass capacitor of up to 0.01µF without  
oscillation.  
■
Ultralow Quiescent Current: 2.1µA Typ (LTC1440)  
■
Wide Supply Range:  
Single: 2V to 11V  
Dual: ±1V to ±5.5V  
■
Input Voltage Range Includes the Negative Supply  
■
■
■
■
■
■
■
Reference Output Drives 0.01µF Capacitor  
Adjustable Hysteresis (LTC1440/LTC1442)  
TTL/CMOS Compatible Outputs  
12µs Propagation Delay with 10mV Overdrive  
No Crowbar Current  
40mA Continuous Source Current  
Pin Compatible Upgrades for MAX921/922/923  
The comparators operate from a single 2V to 11V supply  
or a dual ±1V to ±5.5V supply (LTC1440). Comparator  
hysteresis is easily programmed by using two resistors  
andtheHYSTpin(LTC1440/LTC1442).Eachcomparator’s  
input operates from the negative supply to within 1.3V of  
the positive supply. The comparator output stage can  
continuously source up to 40mA. By eliminating the  
cross-conductingcurrentthatnormallyhappenswhenthe  
comparatorchangeslogicstates,thepowersupplyglitches  
are eliminated.  
U
APPLICATIONS  
■
Battery-Powered System Monitoring  
■
Threshold Detectors  
■
Window Comparators  
Oscillator Circuits  
■
The LTC1440 is available in 8-pin PDIP, SO and MSOP  
packages. The LTC1441/LTC1442 are available in 8-pin  
PDIP and SO packages.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
Micropower 2.9V VCC Threshold Detector  
LTC1440 Supply Current vs Temperature  
3.3V  
5.0  
+
7
V
V
= 5V  
R1  
–
+
= GND = 0V  
1.65M  
4.5  
4.0  
3.5  
3.0  
2.5  
2.0  
1.5  
V
1%  
+
–
3
4
5
6
IN  
+
–
8
R2  
1.13M  
1%  
OUT  
IN  
HYST  
REF  
LTC1440  
–
–40 –20  
20  
40  
0
TEMPERATURE (°C)  
60  
80  
100  
GND  
1
V
2
1440/1/2 TA02  
1440 TA01  
1
1234567...12

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