LP265/LP365 Micropower Programmable Quad Comparator General Description Features 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. Y Typical Connection Connection Diagram 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 stageÐselectable 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 Dual-In-Line Package TL/H/5023–1 Programming Equation TL/H/5023 – 2 ISET e (V a )b(Vb)b1.3V Order Number LP365M, LP365AN or LP365N See NS Package Numbers M16A or N16A RSET ISUPPLY & 22 c ISET C1995 National Semiconductor Corporation TL/H/5023 RRD-B30M115/Printed in U. S. A. LP265/LP365 Micropower Programmable Quad Comparator December 1994 Absolute Maximum Ratings Power Dissipation (Note 3) Tj Max ijA Lead Temp. (SolderingÐ10 sec.) (Vapor PhaseÐ60 sec.) (InfraredÐ15 sec.) Operating Temp. Range LP365: Storage Temp. Range 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 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, ISET e 10 mA LP365A Symbol Parameter Conditions Typ Design Limit (Note 6) 1 3 20 VOS Input Offset Voltage VCM e OV, RS e 100 IOS Input Offset Current VCM e 0V LP265 2 Input Bias Current VCM e 0V LP265 10 AVOL Large Signal Voltage Gain RL e 100k VCM Input CommonMode Voltage Range IB CMRR Common-Mode Rejection Ratio 0sVCMs3V PSRR Supply Voltage Rejection Ratio g 2.5V s VS s g 3.5V IS Supply Current All Inputs e 0V, RL e % VOH Output Voltage High VC e 5V, VE e 0V, RL e 100k VOL Output Voltage Low VE e 0V ISINK Output Sink Current VE e 0V, VO e 0.4V ILEAK Output Leakage Current tR Response Time LP365 Tested Limit (Note 5) 500 50 Typ Tested Limit (Note 5) Design Limit (Note 6) 6 3 6 9 50 4 25 75 4 25 150 15 75 200 15 75 300 300 25 25 V/mV (Min) 125 Units (Limit) mV (Max) nA (Max) nA (Max) 50 50 0 0 0 0 V (Max) 3 3 3 3 V (Min) 85 75 70 80 75 70 dB (Min) 75 65 65 70 65 215 250 300 225 275 300 mA (Max) 4.9 4.5 4.9 4.5 V (Min) 0.4 0.4 V (Max) 0.4 0.4 65 dB (Min) 2.4 1.2 0.6 2.0 0.8 0.4 mA (Min) VC e 5V, VE e 0V 2 50 5000 2 100 5000 nA (Max) VCC e 5V, VE e 0V, RL e 5k, CL e 10 pF (Note 7) 4 4 2 ms Electrical Characteristics (Continued) (Note 8) High power VS e g 15V, ISET e 100 mA LP365A Symbol Parameter Typ Design Limit (Note 6) 1 3 50 Conditions VOS Input Offset Voltage VCM e 0V, RS e 100 IOS Input Offset Current VCM e 0V LP265 5 Input Bias Current VCM e 0V LP265 60 AVOL Large Signal Voltage Gain RL e 15k VCM Input CommonMode Voltage Range IB CMRR Common-Mode Rejection Ratio b 15V s VCM PSRR Supply Voltage Rejection Ratio g 10V s VS s g 15V IS Supply Current All Inputs e 0V, RL e % , LP265 VOH s 13V Output Voltage High VC e 5V, VE e 0V, RL e 100k VOL Output Voltage Low VE e 0V ISINK Output Sink Current VE e 0V, VO e 0.4V ILEAK Output Leakage Current tR Response Time LP365 Tested Limit (Note 5) 500 200 Units (Limit) Typ Tested Limit (Note 5) Design Limit (Note 6) 6 3 6 9 100 10 90 200 10 90 500 80 300 500 80 300 800 500 100 100 V/mV (Min) 500 mV (Max) nA (Max) nA (Max) 100 100 b 15 b 15 b 15 b 15 V (Max) 13 13 13 13 V (Min) 85 75 70 80 75 70 dB (Min) 80 70 70 75 70 70 dB (Min) 2.6 3 3.3 2.8 3.5 3.7 2.8 3.5 4.3 mA (Max) 4.9 4.5 4.9 4.5 V (Min) 0.4 0.4 0.4 0.4 V (Max) 10 8 5.5 7.5 6 4 mA (Min) VC e 15V, VE eb15V 5 50 5000 5 50 5000 nA (Max) VCC e 5V, VE e 0V, RL e 5k, CL e 10 pF (Note 7) 1.0 1.0 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 All four phases run when X is low. When X is high, oscillation stops and power drain is zero. 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. f e 20 kHz fe 1 1.6 # Rt # Ct 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 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. 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 TL/H/5023 – 12 IS @ 6V e 45 mA IS @ 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 THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. 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