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LTC1443CN#PBF PDF预览

LTC1443CN#PBF

更新时间: 2024-11-20 12:58:07
品牌 Logo 应用领域
凌特 - Linear 比较器
页数 文件大小 规格书
12页 179K
描述
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LTC1443CN#PBF 数据手册

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LTC1443/LTC1444/LTC1445  
Ultralow Power Quad  
Comparators with Reference  
U
FEATURES  
DESCRIPTIO  
Ultralow Quiescent Current: 8.5  
µA Max  
TheLTC®1443/LTC1444/LTC1445areultralowpowerquad  
comparators with a built-in reference. The comparators  
feature less than 8.5µA supply current over temperature,  
an internal reference (1.182V ±1% for LTC1443 or 1.221V  
±1% for LTC1444/LTC1445), programmable hysteresis  
(LTC1444/LTC1445) and TTL/CMOS output (LTC1443/  
LTC1445) that sinks and sources current (open-drain  
output for LTC1444). The reference output can drive a  
bypass capacitor of up to 0.01µF without oscillation.  
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 (LTC1444/LTC1445)  
TTL/CMOS Compatible Outputs  
Propagation Delay: 12µs (Typ) (10mV Overdrive)  
No Crowbar Current  
The comparators operate from a single 2V to 11V supply  
or a dual ±1V to ±5.5V supply (LTC1443). Comparator  
hysteresisiseasilyprogrammableusingtworesistorsand  
the HYST pin (LTC1444/LTC1445). Each comparator’s  
input operates from the negative supply to within 1.3V of  
the positive supply. The LTC1443/LTC1445 comparator  
output stage can continuously source up to 40mA. By  
eliminating the cross-conducting current that normally  
happenswhenthecomparatorchangeslogicstates,power  
supply glitches are eliminated.  
40mA Continuous Source Current  
Pin Compatible Upgrades for MAX924 (LTC1443)  
U
APPLICATIO S  
Battery-Powered System Monitoring  
Threshold Detectors  
Window Comparators  
Oscillator Circuits  
The LTC1443/LTC1444/LTC1445 are available in the  
16-pin SO and PDIP packages.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
Reference Settling Test Circuit  
Reference Settling  
3
+
V
IN  
8V  
V+  
V
3.4M  
1%  
5V  
TO 8V  
5V  
+
5
IN A  
+
2
VREF  
OUT  
IN A  
4
14  
HYST  
REF  
1.21M  
1%  
R1  
10k  
OUT  
LTC1445  
8
2ms/DIV  
R2  
2.4M  
R3  
V
LTC1443/1444/1445 • TA02  
430  
9
C1  
1.0µF  
LTC1443/44/45 • TA01  
1

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