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LM161/LM361 High Speed Differential Comparators
August 2000
LM161/LM361 High Speed Differential Comparators
General Description
The LM161/LM361 is a very high speed differential input, complementary TTL output voltage comparator with improved characteristics over the SE529/NE529 for which it is a pin-for-pin replacement. The device has been optimized for greater speed performance and lower input offset voltage. Typically delay varies only 3 ns for over-drive variations of 5 mV to 500 mV. It may be operated from op amp supplies (15V). Complementary outputs having maximum skew are provided. Applications involve high speed analog to digital converters and zero-crossing detectors in disk file systems.
Features
n n n n n n n n Independent strobes Guaranteed high speed: 20 ns max Tight delay matching on both outputs Complementary TTL outputs Operates from op amp supplies: 15V Low speed variation with overdrive variation Low input offset voltage Versatile supply voltage range
Connection Diagrams
Dual-In-Line Package
Logic Diagram
DS005708-4
*Output is low when current is drawn from strobe pin.
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Top View Order Number LM361M, LM361MX or LM361N See NS Package Number M14A or N14A Metal Can Package
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Order Number LM161H/883 or LM361H See NS Package Number H10C
(c) 2000 National Semiconductor Corporation
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LM161/LM361
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Positive Supply Voltage, V+ Negative Supply Voltage, V- Gate Supply Voltage, VCC Output Voltage Differential Input Voltage Input Common Mode Voltage Power Dissipation Storage Temperature Range Operating Temperature Range LM161 LM361 Lead Temp. (Soldering, 10 seconds) For Any Device Lead Below V- +16V -16V +7V +7V
Operating Conditions
Min Supply Voltage V+ LM161 LM361 Supply Voltage V- LM161 LM361 Supply Voltage VCC LM161 LM361 5V 5V -6V -6V 4.5V 4.75V 5V 5V Typ Max 15V 15V -15V -15V 5.5V 5.25V
5V 6V
600 mW -65C to +150C TMAX TMIN -55C to +125C -25C to +85C 0C to +70C 260C 0.3V
ESD Tolerance (Note 5) 1600V Soldering Information Dual-In-Line Package Soldering (10 seconds) 260C Small Outline Package Vapor Phase (60 seconds) 215C Infrared (15 seconds) 220C See AN-450 "Surface Mounting Methods and Their Effect on Product Reliability" for other methods of soldering surface mount devices.
Electrical Characteristics
(V+ = +10V, VCC = +5V, V- = -10V, TMIN TA TMAX, unless noted) Limits Parameter Input Offset Voltage Input Bias Current Input Offset Current Voltage Gain Input Resistance Logical "1" Output Voltage Logical "0" Output Voltage Strobe Input "1" Current (Output Enabled) Strobe Input "0" Current (Output Disabled) Strobe Input "0" Voltage Strobe Input "1" Voltage Output Short Circuit Current Supply Current I+ TA =25C TA =25C TA =25C TA =25C, f=1 kHz VCC =4.75V, ISOURCE =-0.5 mA VCC =4.75V, ISINK =6.4 mA VCC =5.25V, VSTROBE =2.4V VCC =5.25V, VSTROBE =0.4V VCC =4.75V VCC =4.75V VCC =5.25V, VOUT =0V V+ =10V, V- =-10V, VCC =5.25V, -55CTA125C V+ =10V, V- =-10V, VCC =5.25V, 0CTA70C V+ =10V, V- =-10V, VCC =5.25V, -55CTA125C 2 -18 -55 4.5 0.8 2 -18 -55 0.8 V V mA mA -1.6 -1.6 mA 200 200 A 0.4 0.4 V 2.4 Conditions Min LM161 Typ 1 5 20 2 3 3 20 3.3 2.4 3 20 3.3 2 5 Max 3 Min LM361 Typ 1 10 30 Max 5 mV A A A A V/mV k V Units
Supply Current I
+
5
mA
Supply Current I
-
10
mA
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LM161/LM361
Electrical Characteristics
(Continued)
(V+ = +10V, VCC = +5V, V- = -10V, TMIN TA TMAX, unless noted) Limits Parameter Conditions Min Supply Current I
-
LM161 Typ Max Min
LM361 Typ Max 10
Units
V+ =10V, V- =-10V,VCC =5.25V, 0CTA70C V+ =10V, V- =-10V,
mA
Supply Current ICC
VCC =5.25V, -55CTA125C V+ =10V, V- =-10V,
18
mA
Supply Current ICC Transient Response Propagation Delay Time (tpd(0)) Propagation Delay Time (tpd(1)) Delay Between Output A and B Strobe Delay Time (tpd(0)) Strobe Delay Time (tpd(1))
VCC =5.25V, 0CTA70C VIN = 50 mV overdrive (Note 3) TA =25C TA =25C TA =25C TA =25C TA =25C 14 14 2 8 8 20 20 5 14 14 2 8 8
20
mA
20 20 5
ns ns ns ns ns
Note 1: The device may be damaged by use beyond the maximum ratings. Note 2: Typical thermal impedances are as follows:
DS005708-17
Note 3: Measurements using AC Test circuit, Fanout = 1. The devices are faster at low supply voltages. Note 4: Refer to RETS161X for LM161H and LM161J military specifications. Note 5: Human body model, 1.5 k in series with 100 pF.
Typical Performance Characteristics
Offset Voltage Input Currents vs Ambient Temperature Input Characteristics
DS005708-8 DS005708-9
DS005708-10
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LM161/LM361
Typical Performance Characteristics
Supply Current vs Ambient Temperature
(Continued)
Supply Current vs Supply Voltage
Propagation Delay vs Ambient Temperature
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DS005708-12
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Delay of Output 1 With Respect to Output 2 vs Ambient Temperature
Strobe Delay vs Ambient Temperature
Common-Mode Pulse Response
DS005708-15 DS005708-14
DS005708-16
Propagation Delay vs Supply Voltage
DS005708-7
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4
LM161/LM361
AC Test Circuit
DS005708-6
VIN = 50 mV V+ = +10V V- = -10V VCC = 5.25V
FANOUT = 1 R = 2.4k C=15 pF
FANOUT = 4 R = 680 C = 30 pF
5
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LM161/LM361
Schematic Diagram
LM161
DS005708-1
R10, R16: 85 R11, R17: 205
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LM161/LM361
Physical Dimensions
inches (millimeters) unless otherwise noted
Metal Can Package (H) Order Number LM161H/883, or LM361H NS Package Number H10C
Order Number LM361M or LM361MX NS Package Number M14A
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LM161/LM361 High Speed Differential Comparators
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
Molded Dual-In-Line Package (N) Order Number LM361N NS Package Number N14A
LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user.
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