LM760 High Speed Differential Comparator General Description Features The LM760 is a differential voltage comparator offering considerable speed improvement over the LM710 family and operates from symmetric supplies of g 4.5V to g 6.5V. The LM760 can be used in high speed analog-to-digital conversion systems and as a zero crossing detector in disc file and tape amplifiers. The LM760 output features balanced rise and fall times for minimum skew and close matching between the complementary outputs. The outputs are TTL compatible with a minimum sink capability of two gate loads. Y Y Y Y Y Guaranteed high speedÐ 25 ns response time Guaranteed delay matching on both outputs Complementary TTL compatible outputs High sensitivity Standard supply voltages Applications Y Y High speed A-to-D Peak or zero detector Connection Diagram 8-Lead DIP TL/H/10067 – 3 Top View Ordering Information Temperature Range Commercial 0§ C to a 70§ C Package Type NSC Package Drawing LM760CN 8-lead Plastic DIP N08E C1995 National Semiconductor Corporation TL/H/10067 RRD-B30M115/Printed in U. S. A. LM760 High Speed Differential Comparator December 1994 Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Storage Temperature Range Metal Can and Ceramic DIP Molded DIP b 65§ C to a 175§ C b 65§ C to a 150§ C Operating Temperature Range Military (LM760) Commercial (LM760C) b 55§ C to a 125§ C 0§ C to a 70§ C Lead Temperature Metal Can and Ceramic DIP (Soldering, 60 sec.) Molded DIP (Soldering, 10 sec.) Positive Supply Voltage a 8.0V Negative Supply Voltage b 8.0V Peak Output Current Differential Input Voltage Input Voltage ESD Susceptibility 10 mA g 5.0V V a t VI t Vb TBD 300§ C 265§ C LM760 Electrical Characteristics VCC e g 4.5V to g 6.5V, TA e b55§ C to a 125§ C, TA e 25§ C for typical figures, unless otherwise specified Symbol Parameter Conditions Min Typ Max VIO Input Offset Voltage IIO RS s 200X Units 1.0 6.0 mV Input Offset Current 0.5 7.5 mA IIB Input Bias Current 8.0 60 mA RO Output Resistance (Either Output) VO e VOH 100 tPD Response Time TA e 25§ C (Note 3) 18 TA e 25§ C (Note 4) 25 (Note 5) DtPD X 30 ns 16 Response Time Difference between Outputs (Note 1) (tPD of a VI1) b (tPD of bVI2) TA e 25§ C 5.0 (tPD of a VI2) b (tPD of bVI1) TA e 25§ C 5.0 (tPD of a VI1) b (tPD of a VI2) TA e 25§ C 7.5 ns (tPD of bVI1) b (tPD of bVI2) TA e 25§ C RI Input Resistance f e 1.0 MHz 12 7.5 CI Input Capacitance f e 1.0 MHz 8.0 pF DVIO/DT Average Temperature Coefficient of Input Offset Voltage RS e 50X, TA e b55§ C to a 125§ C 3.0 mV/§ C DIIO/DT Average Temperature Coefficient of Input Offset Current TA e a 25§ C to a 125§ C TA e a 25§ C to b55§ C VIR Input Voltage Range VCC e g 6.5V VIDR Differential Input Voltage Range VOH Output Voltage HIGH (Either Output) kX 2.0 nA/§ C 7.0 g 4.0 g 4.5 V g 5.0 V 0 mA s IOH s 5.0 mA VCC e a 5.0V 2.4 3.2 IOH e 80 mA, VCC e g 4.5V 2.4 3.0 V VOL Output Voltage LOW (Either Output) IOL e 3.2 mA 0.25 0.4 V Ia Positive Supply Current VCC e g 6.5V 18 32 mA Ib Negative Supply Current VCC e g 6.5V 9.0 16 mA 2 LM760C Electrical Characteristics VCC e g 4.5V to g 6.5V, TA e 0§ C to a 70§ C, TA e 25§ C for typical figures, unless otherwise specified Symbol Parameter Typ Max Units 1.0 6.0 mV Input Offset Current 0.5 7.5 mA IIB Input Bias Current 8.0 60 mA RO Output Resistance (Either Output) VO e VOH 100 tPD Response Time TA e 25§ C (Note 3) 18 TA e 25§ C (Note 4) (Note 5) 16 VIO Input Offset Voltage IIO Conditions Min RS s 200X X 30 25 ns Response Time Difference between Outputs (Note 1) (tPD of a VI1) b (tPD of bVI2) TA e 25§ C 5.0 (tPD of a VI2) b (tPD of bVI1) TA e 25§ C 5.0 (tPD of a VI1) b (tPD of a VI2) (tPD of bVI1) b (tPD of bVI2) TA e 25§ C TA e 25§ C 10 RI Input Resistance f e 1.0 MHz 12 CI Input Capacitance f e 1.0 MHz 8.0 pF DVIO/DT Average Temperature Coefficient of Input Offset Voltage RS e 50X, TA e 0§ C to a 70§ C 3.0 mV/§ C DIIO/DT Average Temperature Coefficient of Input Offset Current TA e a 25§ C to a 70§ C TA e a 25§ C to 0§ C VIR Input Voltage Range VCC e g 6.5V VIDR Differential Input Voltage Range VOH Output Voltage HIGH (Either Output) DtPD ns 10 kX 5.0 nA/§ C 10 g 4.0 g 4.5 V g 5.0 V 0 mA s IOH s 5.0 mA VCC e a 5.0V 2.4 3.2 IOH e 80 mA, VCC e g 4.5V 2.5 3.0 V VOL Output Voltage LOW (Either Output) IOL e 3.2 mA 0.25 0.4 V Ia Positive Supply Current VCC e g 6.5V 18 34 mA Ib Negative Supply Current VCC e g 6.5V 9.0 16 mA Note 1: TJ Max e 150§ C. Note 2: Ratings apply to ambient temperature at 25§ C. Note 3: Response time measured from the 50% point of a 30 mVP–P 10 MHz sinusoidal input to the 50% point of the output. Note 4: Response time measured from the 50% point of a 2.0 VP–P 10 MHz sinusoidal input to the 50% point of the output. Note 5: Response time measured from the start of a 100 mV input step with 5.0 mV overdrive to the time when the output crosses the logic threshold. 3 Typical Performance Characteristics Response Time for Various Output Overdrives Response Time for Various Input Overdrives Response Time vs Input Voltage Response Time vs Input Voltage Voltage Transfer Characteristic Voltage Transfer Characteristic Voltage Gain vs Supply Voltage Voltage Gain vs Temperature Input Bias Current vs Temperature Input Offset Current vs Temperature Response Time vs Temperature Output Voltage Levels vs Temperature TL/H/10067 – 5 4 Typical Performance Characteristics (Continued) Rise Time vs Capacitive Load Fall Time vs Capacitive Load Input Bias Current vs Differential Input Voltage Common Mode Range vs Supply Voltage TL/H/10067 – 6 Equivalent Circuit TL/H/10067 – 4 5 Typical Applications (Note 1) Fast Positive Peak Detector Line Receiver with High Common Mode Range TL/H/10067 – 10 Common mode range e g 4 c TL/H/10067–7 RS V 50 Differential Input Sensitivity e 5 c Level Detector with Hysteresis RS mV 50 P1 must be adjusted for optimum common mode rejection. For RS e 200X: Common mode range e g 16V Sensitivity e 20 mV TL/H/10067–8 Zero Crossing Detector (Note 2) TL/H/10067 – 9 Total delay e 30 ns Input Frequency e 300 Hz to 3.0 MHz Minimum input voltage e 20 mVP–P Note 1: Lead numbers shown are for Metal Package only. Note 2: All resistor values in ohms. 6 Typical Applications (Note 1) (Continued) High Speed 3-Bit A/D Converter TL/H/10067 – 11 Input voltage range e 3.5V Typical conversion speed e 30 ns 7 8 Physical Dimensions inches (millimeters) 8-Lead Metal Can Package (H) Order Number LM760CH or LM760H NS Package Number H08A 8-Lead Ceramic Dual-In-Line Package (J) Order Number LM760CJ or LM760J NS Package Number J08A 9 LM760 High Speed Differential Comparator Physical Dimensions inches (millimeters) (Continued) 8-Pin Molded Dual-In-Line Package (N) Order Number LM760CN NS Package Number N08E 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 OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. 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