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LM397

更新时间： 2024-11-23 12:09:47
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德州仪器 - TI 比较器
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14页 800K
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LM397 Single General Purpose Voltage Comparator

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LM397  
www.ti.com  
SNOS977D –MAY 2001–REVISED MARCH 2013  
LM397 Single General Purpose Voltage Comparator  
Check for Samples: LM397  
1
FEATURES  
DESCRIPTION  
The LM397 is a single voltage comparator with an  
input common mode that includes ground. The  
LM397 is designed to operate from a single 5V to  
30V power supply or a split power supply. Its low  
supply current is virtually independent of the  
magnitude of the supply voltage.  
2
•
(TA = 25°C. Typical Values Unless Otherwise  
Specified).  
•
•
•
•
•
•
•
•
•
•
5-Pin SOT-23 Package  
Industrial Operating Range −40°C to +85°C  
Single or Dual Power Supplies  
Wide Supply Voltage Range 5V to 30V  
Low Supply Current 300µA  
The LM397 features an open collector output stage.  
This allows the connection of an external resistor at  
the output. The output can directly interface with TTL,  
CMOS and other logic levels, by tying the resistor to  
different voltage levels (level translator).  
Low Input Bias Current 7nA  
Low Input Offset Current ±1nA  
Low Input Offset Voltage ±2mV  
Response Time 440ns (50mV Overdrive)  
Input Common Mode Voltage 0 to VS - 1.5V  
The LM397 is available in space saving 5-Pin SOT-  
23 package and pin compatible to TI’s TL331, single  
differential comparator.  
APPLICATIONS  
•
•
•
•
A/D Converters  
Pulse, Square Wave Generators  
Peak Detector  
Industrial Applications  
Typical Circuit  
Connection Diagram  
V
S
Top View  
1
2
5
-
R
PULL-UP  
V
V
S
IN  
-
V
IN  
R
1
V
O
+
GND  
+
3
4
OUTPUT  
V
IN  
R
3
R
2
Figure 1. 5-Pin SOT-23 Package  
See Package Number DBV0005A  
Figure 2. Inverting Comparator with Hysteresis  
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam  
during storage or handling to prevent electrostatic damage to the MOS gates.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2001–2013, Texas Instruments Incorporated  
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