lm397-mdc National Semiconductor Corporation, lm397-mdc Datasheet

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lm397-mdc

Manufacturer Part Number
lm397-mdc
Description
Single General Purpose Voltage Comparator
Manufacturer
National Semiconductor Corporation
Datasheet
© 2006 National Semiconductor Corporation
Ordering Information
LM397
Single General Purpose Voltage Comparator
General 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.
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).
The LM397 is available in space saving 5-Pin SOT23 pack-
age and pin compatible to TI’s TL331, single differential
comparator.
Connection Diagram
5-Pin SOT-23
Package
5-Pin SOT23
Top View
Part Number
LM397MFX
LM397MF
DS200221
20022108
Package Marking
C397
Features
(T
n 5-Pin SOT23 package
n Industrial operating range
n Single or dual power supplies
n Wide supply voltage range
n Low supply current
n Low input bias current
n Low input offset current
n Low input offset voltage
n Response time
n Input common mode voltage
Applications
n A/D converters
n Pulse, square wave generators
n Peak detector
n Industrial applications
Typical Circuit
A
FIGURE 1. Inverting Comparator with Hysteresis
= 25˚C. Typical values unless otherwise specified).
1k Units Tape and Reel
3k Units Tape and Reel
Transport Media
440ns (50mV overdrive)
NSC Drawing
−40˚C to +85˚C
MF05A
0 to V
www.national.com
August 2006
20022109
5V to 30V
S
300µA
±
- 1.5V
±
2mV
7nA
1nA

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lm397-mdc Summary of contents

Page 1

... LM397 Single General Purpose Voltage Comparator General 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 ...

Page 2

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Human Body Model Machine Model V Differential IN Supply Voltages Voltage at Input Pins Storage ...

Page 3

Typical Performance Characteristics Supply Current vs. Supply Voltage Output Saturation Voltage vs. Output Sink Current Response Time for Various Input Overdrives – 25˚C. Unless otherwise specified. A Input Bias Current vs. Supply Current 20022103 Input Offset Voltage ...

Page 4

... R 3 voltage V is calculated by (( The hysteresis is defined as 20022110 20022111 FIGURE 3. Inverting Configured Comparator – LM397 the inverting node is less than IN ), the output is high. The equivalent T in parallel with The lower threshold voltage (((R R ...

Page 5

... Application Notes (Continued) Input Stage The LM397 has a bipolar input stage. The input common mode voltage range is from – 1.5V). S 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 ...

Page 6

SOT23-5 Tape and Reel Specification Tape Format Tape Section Leader (Start End) Carrier Trailer (Hub End) TAPE DIMENSIONS 8mm 0.130 0.124 (3.3) (3.15) Tape Size DIM A DIM Ao www.national.com # Cavities Cavity Status 0 (min) Empty 75 (min) Empty ...

Page 7

SOT23-5 Tape and Reel Specification REEL DIMENSIONS 8mm 7.00 0.059 330.00 1.50 Tape Size A B (Continued) 0.512 0.795 2.165 0.331 + 0.059/−0.000 13.00 20.20 55.00 8.40 + 1.50/−0. 20022116 0.567 W1 + 0.078/−0.039 14.40 ...

Page 8

Physical Dimensions inches (millimeters) unless otherwise noted National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and ...

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