LM161/LM261/LM361 High Speed Differential Comparators General Description Features The LM161/LM261/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. 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 Metal Can Package DS005708-3 Order Number LM161H/883 (Note 1), or LM361H See NS Package Number H10C DS005708-2 Top View Order Number LM161J LM361M or LM361N See NS Package Number M14A or N14A Note 1: Also available per SMD #5962-8757203 © 1999 National Semiconductor Corporation DS005708 www.national.com LM161/LM261/LM361 High Speed Differential Comparators May 1999 Logic Diagram DS005708-4 *Output is low when current is drawn from strobe pin. www.national.com 2 Absolute Maximum Ratings (Note 2) Operating Conditions 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 LM261 LM361 Lead Temp. (Soldering, 10 seconds) For Any Device Lead Below V− Min Supply Voltage V+ LM161/LM261 LM361 Supply Voltage V− LM161/LM261 LM361 Supply Voltage VCC LM161/LM261 LM361 +16V −16V +7V +7V ± 5V ± 6V 600 mW −65˚C to +150˚C TMAX TMIN −55˚C to +125˚C −25˚C to +85˚C 0˚C to +70˚C 260˚C 0.3V Typ Max 5V 5V 15V 15V −6V −6V −15V −15V 4.5V 4.75V 5V 5V 5.5V 5.25V ESD Tolerance (Note 6) 1600V Soldering Information Dual-In-Line Package Soldering (10 seconds) 260˚C Small Outline Package Vapor Phase (60 seconds) 215˚C Infrared (15 seconds) 220˚C 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 Conditions LM161/LM261 Min Input Offset Voltage Input Bias Current TA = 25˚C LM361 Typ Max 1 3 Min 5 Max 1 5 mV 30 µA 10 20 Input Offset Current TA = 25˚C Units Typ 2 µA 2 3 µA 5 µA Logical “1” Output Voltage TA = 25˚C TA = 25˚C, f = 1 kHz VCC = 4.75V, Logical “0” Output Voltage ISOURCE = −0.5 mA VCC = 4.75V, 0.4 0.4 V Strobe Input “1” Current ISINK = 6.4 mA VCC = 5.25V, 200 200 µA VSTROBE = 2.4V VCC = 5.25V, −1.6 −1.6 mA 0.8 V −55 mA Voltage Gain Input Resistance (Output Enabled) Strobe Input “0” Current (Output Disabled) Strobe Input “0” Voltage Strobe Input “1” Voltage Output Short Circuit Current Supply Current I+ 3 20 2.4 VSTROBE = 0.4V VCC = 4.75V VCC = 4.75V VCC = 5.25V, VOUT = 0V V+ = 10V, V− = −10V, VCC = 5.25V, −55˚C≤TA≤125˚C Supply Current I+ V+ = 10V, V− = −10V, VCC = 5.25V, 0˚C≤TA≤70˚C Supply Current I− V+ = 10V, V− = −10V, VCC = 5.25V, −55˚C≤TA≤125˚C 3.3 2.4 0.8 2 −18 3 V/mV 20 kΩ 3.3 V 2 −55 −18 V 4.5 mA 5 10 3 mA mA www.national.com Electrical Characteristics (Continued) (V+ = +10V, VCC = +5V, V− = −10V, TMIN ≤ TA ≤ TMAX, unless noted) Limits Parameter Conditions LM161/LM261 Min Typ LM361 Max Min Typ V+ = 10V, V− = −10V,VCC = 5.25V, 0˚C≤TA≤70˚C Supply Current I− 10 V+ = 10V, V− = −10V, VCC = 5.25V, Supply Current ICC Units Max 18 mA mA −55˚C≤TA≤125˚C V+ = 10V, V− = −10V, Supply Current ICC VCC = 5.25V, Transient Response 0˚C≤TA≤70˚C VIN = 50 mV overdrive 20 mA ns (Note 4) TA = 25˚C TA = 25˚C 14 20 14 20 14 20 14 20 ns 2 5 2 5 ns Strobe Delay Time (tpd(0)) TA = 25˚C TA = 25˚C 8 8 ns Strobe Delay Time (tpd(1)) TA = 25˚C 8 8 ns Propagation Delay Time (tpd(0)) Propagation Delay Time (tpd(1)) Delay Between Output A and B Note 2: The device may be damaged by use beyond the maximum ratings. Note 3: Typical thermal impedances are as follows: DS005708-17 Note 4: Measurements using AC Test circuit, Fanout = 1. The devices are faster at low supply voltages. Note 5: Refer to RETS161X for LM161H and LM161J military specifications. Note 6: Human body model, 1.5 kΩ in series with 100 pF. Typical Performance Characteristics Offset Voltage Input Currents vs Ambient Temperature Input Characteristics DS005708-10 DS005708-8 DS005708-9 www.national.com 4 Typical Performance Characteristics Supply Current vs Ambient Temperature (Continued) Supply Current vs Supply Voltage DS005708-12 DS005708-11 Delay of Output 1 With Respect to Output 2 vs Ambient Temperature Propagation Delay vs Ambient Temperature Strobe Delay vs Ambient Temperature DS005708-13 Common-Mode Pulse Response DS005708-15 DS005708-16 DS005708-14 Propagation Delay vs Supply Voltage DS005708-7 5 www.national.com AC Test Circuit DS005708-6 VIN = ± 50 mV V+ = +10V FANOUT = 1 R = 2.4k FANOUT = 4 R = 680Ω V− = −10V VCC = 5.25V C = 15 pF C = 30 pF www.national.com 6 Schematic Diagram LM161 DS005708-1 R10, R16: 85 R11, R17: 205 7 www.national.com Physical Dimensions inches (millimeters) unless otherwise noted Metal Can Package (H) Order Number LM161H/883, or LM361H NS Package Number H10C Ceramic Dual-In-Line Package (J) Order Number LM161J NS Package Number J14A www.national.com 8 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number LM361M NS Package Number M14A Molded Dual-In-Line Package (N) Order Number LM361N NS Package Number N14A 9 www.national.com LM161/LM261/LM361 High Speed Differential Comparators Notes 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. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: [email protected] www.national.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: [email protected] Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 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