LP365AN

LP265 LP365 Micropower Programmable Quad Comparator December 1994 LP265 LP365 Micropower Programmable Quad Comparator General Description The LP365 consists of four independent voltage comparators The comparators can be programmed four at the same time for various supply currents input currents response times and output current drives This is accomplished by connecting a single resistor between the VCC and ISET pins These comparators can be operated from split power supplies or from a single power supply over a wide range of voltages The input can sense signals at ground level even with single supply operation The unique output NPN transistor stages are uncommitted to either power supply They can be connected directly to various logic system supplies so that they are highly flexible to interface with various logic families Application areas include battery power circuits threshold detectors zero crossing detectors simple serial A D converters VCO multivibrators voltage converters power sequencers and high performance V F converters and RTD linearization Features Y Y Y Y Y Y Y Single programming resistor to tailor power consumption input current speed and output current drive capability Wide single supply voltage range or dual supplies (4 VDC to 36 VDC or g 2 0 VDC to g 18 VDC) Low supply current drain (10 mA) and low power consumption (10 mW comparator) ISET e 0 5 mA VCC e 5VDC Uncommitted output stage selectable output levels Output directly compatible with DTL TTL CMOS MOS or other special logic families Input common-mode range includes ground Differential input voltage equal to the power supply voltage Typical Connection Connection Diagram Dual-In-Line Package TL H 5023–1 Programming Equation TL H 5023 – 2 ISET e (V a )b(Vb)b1 RSET 22 c ISET 3V Order Number LP365M LP365AN or LP365N See NS Package Numbers M16A or N16A ISUPPLY C1995 National Semiconductor Corporation TL H 5023 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage 36 VDC or g 18 VDC g 36 VDC Differential Input Voltage b 0 3V to a 36 VDC Input Voltage (Note 1) Output Short Circuit to VE (Note 2) Continuous VOUT with Respect to VE VEb7VsVOUTsVE a 36V ESD Tolerance (Note 10) 2000V Power Dissipation (Note 3) Tj Max ijA Lead Temp (Soldering 10 sec ) (Vapor Phase 60 sec ) (Infrared 15 sec ) Operating Temp Range LP365 Storage Temp Range M Package 500 mW 115 C 115 C W N Package 500 mW 115 C 90 C W 260 C 215 C 220 C 0 C s TA s a 70 C b 40 C s TA s a 150 C Electrical Characteristics (Note 4) Low power VS e 5V LP365A Symbol Parameter Conditions Typ Tested Limit (Note 5) 3 20 ISET e 10 mA LP365 Design Limit (Note 6) 6 50 Typ Tested Limit (Note 5) 6 25 25 75 75 25 0 3 80 70 225 75 65 275 Design Limit (Note 6) 9 75 150 200 300 25 0 3 70 65 Units (Limit) mV (Max) nA (Max) nA (Max) V mV (Min) V (Max) V (Min) dB (Min) dB (Min) mA (Max) V (Min) V (Max) mA (Min) nA (Max) VOS IOS Input Offset Voltage Input Offset Current Input Bias Current Large Signal Voltage Gain Input CommonMode Voltage Range VCM e OV RS e 100 VCM e 0V LP265 VCM e 0V LP265 RL e 100k 1 2 3 4 4 IB 10 50 125 15 15 AVOL VCM 500 50 0 3 50 0 3 70 65 300 300 CMRR PSRR IS VOH Common-Mode Rejection Ratio Supply Voltage Rejection Ratio Supply Current Output Voltage High Output Voltage Low Output Sink Current Output Leakage Current Response Time 0sVCMs3V g 2 5V s VS s g 3 5V 85 75 215 75 65 250 All Inputs e 0V RL e % VC e 5V VE e 0V RL e 100k VE e 0V VE e 0V VO e 0 4V VC e 5V VE e 0V VCC e 5V VE e 0V RL e 5k CL e 10 pF (Note 7) 300 49 45 04 49 45 VOL ISINK ILEAK tR 04 24 2 12 50 04 20 2 08 100 04 04 5000 06 5000 4 4 ms 2 Electrical Characteristics (Continued) (Note 8) High power VS e g 15V LP365A Symbol Parameter Conditions Typ VOS IOS Input Offset Voltage Input Offset Current Input Bias Current Large Signal Voltage Gain Input CommonMode Voltage Range VCM e 0V RS e 100 VCM e 0V LP265 VCM e 0V LP265 RL e 15k Tested Limit (Note 5) 3 50 Design Limit (Note 6) 6 100 ISET e 100 mA LP365 Typ Tested Limit (Note 5) 6 90 90 300 300 100 b 15 Design Limit (Note 6) 9 200 500 500 800 100 b 15 Units (Limit) 1 5 3 10 10 mV (Max) nA (Max) nA (Max) V mV (Min) V (Max) V (Min) dB (Min) dB (Min) mA (Max) V (Min) V (Max) mA (Min) nA (Max) IB 60 200 500 80 80 AVOL VCM 500 100 b 15 100 b 15 500 13 CMRR PSRR IS Common-Mode Rejection Ratio Supply Voltage Rejection Ratio Supply Current b 15V s VCM s 13V g 10V s VS s g 15V 13 70 70 33 80 75 28 28 13 75 70 35 35 49 13 70 70 37 43 45 85 80 26 75 70 3 All Inputs e 0V RL e % LP265 VC e 5V VE e 0V RL e 100k VE e 0V VE e 0V VO e 0 4V VC e 15V VE eb15V VCC e 5V VE e 0V RL e 5k CL e 10 pF (Note 7) VOH Output Voltage High Output Voltage Low Output Sink Current Output Leakage Current Response Time 49 45 VOL ISINK ILEAK tR 04 10 5 8 50 04 55 5000 75 5 04 6 50 04 4 5000 10 10 ms Note 1 The input voltage is not allowed to go 0 3V above V a or b 0 3V below Vb as this will turn on a parasitic transistor causing large currents to flow through the device Note 2 Short circuits from the output to V a may cause excessive heating and eventual destruction The current in the output leads and the VE lead should not be allowed to exceed 30 mA The output should not be shorted to Vb if VE s (Vb) a 7V Note 3 For operating at elevated temperatures these devices must be derated based on a thermal resistance of ijA and Tj max Tj e TA a ijAPD Note 4 Boldface numbers apply at temperature extremes All other numbers apply at TA e Tj e 25 C V a e 5V Vb e 0V ISET e 10 mA RL e 100k and VC e 5V as shown in the Typical Connection diagram Note 5 Guaranteed and 100% production tested Note 6 Guaranteed (but not 100% production tested) over the operating temperature and supply voltage ranges These limits are not used to calculate out-going quality levels Note 7 The response time specified is for a 100 mV input step with 5 mV overdrive Note 8 Boldface numbers apply at temperature extremes All other numbers apply at TA e Tj e 25 C V a e a 15V Vb eb 15V ISET e 100 mA RL e 100k and VC e 5V as shown in the Typical Connection diagram Note 9 See AN-450 ‘‘Surface Mounting Methods and Their Effect on Product Reliability’’ for other methods of soldering surface mount devices Note 10 Human body model 1 5 kX in series with 100 pF 3 Typical Performance Characteristics Supply Current vs ISET Supply Current vs Supply Voltage Supply Current vs Temperature Input Bias Current vs ISET Output Saturation Voltage Voltage Gain vs ISET Response Time Negative Transition Response Time Positive Transition Response Time Negative Transition Response Time Positive Transition TL H 5023 – 3 4 Typical Applications Gated 4-Phase Oscillator ‘‘Voting’’ Comparator TL H 5023 – 4 TL H 5023 – 5 f e 20 kHz fe 1 1 6  Rt  Ct If VE e 0 25V then VOUT will be low if 1 of the 3 other outputs are low Choice of VE e 0 50V causes VOUT to be low if 2 of the 3 other outputs are low VE e 0 75V will cause VOUT to be low if all 3 other outputs are low All four phases run when X is low When X is high oscillation stops and power drain is zero 5 Typical Applications (Continued) Hysteresis from Emitter Ordinary Hysteresis TL H 5023–6 TL H 5023 – 7 It is a good practice to add a few millivolts of positive feedback to prevent oscillation when the input voltage is near the threshold Positive feedback from the emitter can also prevent oscillations when VIN is near the threshold Bar-Graph Display Level-Sensitive Strobe TL H 5023–8 TL H 5023 – 9 The positive feedback from pin 16 provides hysteresis Comparators B C and D do not respond until activated by the signal applied to comparator A 6 Typical Applications (Continued) Slow Op Amp (Unity-Gain Follower) Slow Op Amp (Inverter) TL H 5023 – 10 TL H 5023 – 11 RB e V a 20 mA Unlike most comparators the LP365 can be used as an op amp if suitable R-C damping networks are used RB e V a 20 mA The LP365 can also be used as a high-input-impedance follower-amplifier with the damping components shown Chopping Outputs Low Battery Detector TL H 5023 – 13 IS IS TL H 5023 – 12 6V e 45 mA 3 8V e 1 mA f e 3 kHz Comparator A detects when the supply voltage drops to 4V and enables comparator B to drive a piezoelectric alarm Chopping the outputs by modulating the ISET current allows data to be transmitted via opto-couplers transformers etc 7 Simplified Schematic TL H 5023 – 14 Current sources are programmed by ISET VE is common to all 4 comparators 8 Physical Dimensions inches (millimeters) Plastic Surface-Mount Package (M) Order Number LP365M NS Package Number M16A 9 LP265 LP365 Micropower Programmable Quad Comparator Physical Dimensions inches (millimeters) (Continued) Molded Dual-In-Line Package (N) Order Number LP365AN or LP365N NS Package Number N16A LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT 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