National Semiconductor LP339 Ultra-Low Power Quad Comparator handbook
Contents
1. or V on split supplies Note 9 36 Voc Note 1 Absolute Maximum Ratings indicate limits beyond which damage to the device may occur Operating Ratings indicate conditions for which the device is func tional but do not guarantee specific performance limits Note 2 For elevated temperature operation T max is 125 C for the LP339 junction to ambient is 175 C W for the LP339N and 120 C W for the LP339M when either device is soldered in a printed circuit board in a still air environment The low bias dissipation and the ON OFF characteristic of the outputs keeps the chip dissipation very small Pp lt 100 mW provided the output transistors are allowed to saturate Note 3 Short circuits from the output to V can cause excessive heating and eventual destruction The maximum output current is approximately 50 mA Note 4 This input current will only exist when the voltage at any of the input leads is driven negative It is due to the collector base junction of the input PNP tran sistors becoming forward biased and thereby acting as input clamp diodes In addition to this diode action there is also lateral NPN parasitic transistor action on the chip This transistor action can cause the output voltage of the comparators to go to the V voltage level or to ground for a large input overdrive for the time du ration that an input is driven negative This is not destructive and normal output states will re establi2. Voc Continued Time Delay Generator C1 0 001 pF P TT Les 0 t4 INPUT GATING SIGNAL t2 30k v v3 5 v Vor 7 0 2 DS005226 15 vt DS005226 16 www national com Typical Applications 15 Voo Continued Squarewave Oscillator gt f 10 kHz 05005226 17 Three Level Audio Peak Indicator 5 dB 1 378 Vrms P DS005226 19 LED Driver 5V VIN 05005226 22 www national com 6 Typical Applications 15 Voc Continued Pulse Generator on 500 E DS005226 18 Bi Stable Multivibrator 5 15k v 100k J Ll 0 ERES JL v 100k DS005226 21 Relay Driver 12V 12V 10 mA RELAY 4 VN COIL DS005226 23 7 www national com Typical Applications 15 Voo Continued Buzzer Driver Comparator With 60 mA Sink Capability 12V N BUZZER 20 mA 12V VIN i 05005226 24 DS005226 25 Non Inverting Comparator with Hysteresis Inverting Comparator with Hysteresis v VREF n 30k Vo V 10k 1M 3 VIN A y DS005226 26 1M 5 DS005226 27 Comparing Input Voltages Basic Comparator Output Strobing of Opposite Polarity yt 100k 2N2222 30k 62k 51k Vo Vo VneF STROBE 0 INPUT DS005226 29 DS005226 30 05005226 28 www national com 8 Typi
3. 0 0 9 0 0 LP339 General Description The LP339 consists of four independent voltage compara tors designed specifically to operate from a single power supply and draw typically 60 uA of power supply drain cur rent over a wide range of power supply voltages Operation from split supplies is also possible and the ultra low power supply drain current is independent of the power supply volt age These comparators also feature a common mode range which includes ground even when operated from a single supply Applications include limit comparators simple analog to digital converters pulse square and time delay generators VCO s multivibrators high voltage logic gates The LP339 was specifically designed to interface with the CMOS logic family The ultra low supply current makes the LP339 valuable in battery powered applications Advantages m Ultra low power supply drain suitable for battery applications September 1999 National Semiconductor Ultra Low Power Quad Comparator m Single supply operation m Sensing at ground m Compatible with CMOS logic family m Pin out identical to LM339 Features m Ultra low power supply current drain 60 uA independent of the supply voltage 75 uW comparator at 5 Low input biasing current nA Low input offset current 0 5 nA Low input offset voltage 2 mV Input common mode voltage includes ground Output voltage compatible with MOS and CMOS logic High outp
4. 5 C Note 10 At output switch point V7 1 4V Rg 0Q with V from 5 and over the full input common mode range 0 to V 1 5 Vpc Note 11 For input signals that exceed only the overdriven comparator is affected With a 5V supply Viy should be limited to 25V maximum and a limiting resistor should be used on all inputs that might exceed the positive supply Note 12 The output sink current is a function of the output voltage The LP339 has a bi modal output section which allows it to sink large currents via a Darlington connection at output voltages greater than approximately 1 5 Vpc and sink lower currents below this point See typical characteristics section and applications sec tion Typical Performance Characteristics Supply Current Input Current 100 ViN CM 0 80 8 10100 x z z 2 60 E gt 40 a T 2 z 0 SUPPLY VOLTAGE Voc V SUPPLY VOLTAGE Voc 05005226 35 DS005226 36 Output Sink Current Response Times for Various Input 100 Ltt TT yy Ty Overdrives m Negative Transition 60 5z x z 4 E 5 15 2 Em gt 0 1 2 5 u OUTPUT VOLTAGE Voc 1 E ap DS005226 38 2g TIME us 05005226 39 Output Sink Current 1 0 E 08 Ta 0 C 06 8 Ta 25 C z Ta 70 C 5 04 Ri 2 5 02 0 0 00 02 04 06 08 10 OUTPU
5. E 22 292 0 075 0 015 3175 3 810 1 905 0 381 NL TES 0 014 0 023 001 0423 p 0356 05 0 100 0 010 MIN P mo C 280 0280 m TYP 0 040 1 270 0 254 0325 0 015 1016 a2ss ian NuA REV Molded Dual In Line Package Order Number LP339N NS Package Number N14A www national com 10 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 2 A critical component is any component of a life 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 National Semiconductor Corporation Europe Americas Fax 449 0 1 80 530 85 86 Tel 1 800 272 9959 Email europe support nsc com Fax 1 800 737 7018 Deutsch Tel 49 0 1 80 530 85 85 Email support nsc com English Tel 49 0 1 80 532 78 32 Frangais Tel 49 0 1 80 532 93 58 www national com Italiano Tel 49 0 1 80 534 16 80 support device or system whose failure to perform can be reasonably exp
6. Molded DIP 570 mW mount devices Output Short Circuit to GND Note 3 Continuous Input Current Vn lt 0 3 Vpc Note 4 50 mA Electrical Characteristics V 5 Vpc Note 5 Parameter Conditions Min Typ Max Units Input Offset Voltage T 25 C Note 10 2 5 mVpc Input Bias Current lin or with the 25 25 nApc Output the Linear Range T 25 C Note 6 Input Offset Current lin lin Ta 25 C 20 5 25 Input Common TA725 C Note 7 0 V4 1 5 Voc Mode Voltage Range Supply Current R_ Infinite on all Comparators T 25 C 60 100 UApc Voltage Gain Vs Vag te 11 Vie 500 VimV 215 V 15 Vpc Ta 25 C Large Signal TTL Logic Swing Vage71 4 Voc 1 3 uSec Response Time Vg 75 R 75 1 TA 25 C Response Time Vni 75 Voc 25 1 25 Note 8 8 uSec Output Sink Current TA725 C Note 12 Vin 1 Vin 0 Vo 2 Voc 15 30 Vo 0 4 Voc 0 20 0 70 Output Leakage Current Vin 1 Vin 0 Vo 5 Vpc Ta 25 C 0 1 nApc Input Offset Voltage Note 10 9 mVpc Input Offset Current lin lin 1 15 Input Bias Current lin or ln with Output in Linear Range 4 40 Input Common Single Supply 0 V 2 0 Voc Mode Voltage Range Output Sink Current Vin 1 Vin 0 Vo 2 Voc 10 Output Leakage Current Vin 1 Vin 0 Vo 30 Voc 1 0 Differential Input Voltage All Vi 20
7. T VOLTAGE Voc Response Times for Various Input Overdrives Positive Transition Vo OUTPUT VOLTAGE V Vin INPUT VOLTAGE mV 5 10 TIME us DS005226 37 05005226 40 www national com Application Hints All pins of any unused comparators should be tied to the negative supply The bias network of the LP339 establishes a drain current which is independent of the magnitude of the power supply voltage over the range of from 2 to 30 Vpc It is usually unnecessary to use a bypass capacitor across the power supply line The differential input voltage may be larger than V without damaging the device Protection should be provided to pre vent the input voltages from going negative more than 0 3 Vpc at 25 C An input clamp diode can be used as shown in the application section The output section of the LP339 has two distinct modes of operation a Darlington mode and a grounded emitter mode This unique drive circuit permits the LP339 to sink 30 mA at Vo 2 Darlington mode and 700 HA at Vo 0 4 Voc grounded emitter mode Figure 1 is a simplified schematic diagram of the LP339 output section Typical Applications v 15 v Vcc 6 pA Vout d 02 con FIGURE 1 Notice that the output section is configured in a Darlington connection ignoring Q3 Therefore if the output voltage is held high enough Vo21 Vpc Q1 is not saturated and the output current i
8. cal Applications 15 Voo Continued Transducer Amplifier 30k MAGNETIC 10k 05005226 31 Split Supply Applications Zero Crossing Detector v DS005226 33 Zero Crossing Detector Single Power Supply 05005226 32 Comparator With a Negative Reference DS005226 34 www national com Physical Dimensions inches millimeters unless otherwise noted 0 335 0 344 8 509 8 738 0 228 0 244 16791 6 198 i LEAD NO 1 IDENT 0 010 Max 0 254 0 150 0 157 3 810 3 988j 0 010 0 020 0 053 0 069 0 254 0 508 9 1 346 1159 8 MAX TYP 0 004 0 010 ALL LEADS 0 102 0 254 1 SEATING Ni ER i 0 008 0 010 0 014 0 020 0 203 0 254 9 016 0 050 0 356 0 508 s TYP ALL LEADS 0 004 0 406 1 270 0 102 TYP ALL LEADS ALL LEAD TIPS MIA REV S O Package M Order Number LP339M NS Package M14A 0 740 0 70 r 18 80 19 56 0 090 2 286 i INDEX 7 AREA 0 250 0 010 6 350 10 254 PIN NO 1 IDENT 1 2 3 4 5 IDENT 0 092 0 030 _ 2 337 10 762 DEPTH OPTION 1 OPTION 02 Mri m 0 300 0 320 035 020 0 060 ryp awe am 2881 5180 gt 1 651 um RES 0 008 0 016 0 020 90 4 195 To 7 0 203 0 406 m one a vs 0 150
9. ected to cause the failure of the life support device or system or to affect its safety or effectiveness National Semiconductor National Semiconductor Asia Pacific Customer Japan Ltd Response Group Tel 81 3 5639 7560 Tel 65 2544466 Fax 81 3 5639 7507 Fax 65 2504466 Email sea support nsc com National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications 101e1edujo 19Mod 66691
10. s limited only by the product of the betas of Q1 Q2 and 11 and the 600 Rsar of Q2 The LP339 is thus capable of driving LED s relays etc in this mode while maintaining an ultra low power supply current of typically 60 pA If transistor Q3 were omitted and the output voltage allowed to drop below about 0 8 Vpc transistor Q1 would saturate and the output current would drop to zero The circuit would therefore be unable to pull low current loads down to ground or the negative supply if used Transistor Q3 has been included to bypass transistor Q1 under these condi tions and apply the current 11 directly to the base of Q2 The output sink current is now approximately 11 times the beta of Q2 700 pA at Vo 0 4 Voc The output of the LP339 exhib its a bi modal characteristic with a smooth transition be tween modes See Output Sink Current graphs in Typical Performance Characteristics section It is also important to note that in both cases the output is an uncommitted collector Therefore many collectors can be tied together to provide an output OR ing function An output pull up resistor can be connected to any available power supply voltage within the permitted power supply voltage range and there is no restriction on this voltage due to the magnitude of the voltage which is applied to the V terminal of the LP339 package One Shot Multivibrator v DS005226 13 www national com Typical Applications 15
11. sh when the input voltage which is negative again returns to a value greater than 0 3 Vpc 25 Note 5 These specifications apply for V 5Vpc and 0 C TAx70 C unless otherwise stated The temperature extremes are guaranteed but not 100 production tested These parameters are not used to calculate outgoing AQL Note 6 The direction of the input current is out of the IC due to the PNP input stage This current is essentially constant independent of the state of the output so no loading change exists on the reference or the input lines as long as the common mode range is not exceeded Note 7 The input common mode voltage or either input voltage should not be allowed to go negative by more than 0 3V The upper end of the common mode volt age range is V 1 5V 25 but either or both inputs can go to 30 without damage Note 8 The response time specified is for a 100 mV input step with 5 mV overdrive For larger overdrive signals 1 3 us can be obtained See Typical Performance Characteristics section www national com Electrical Characteristics continued Note 9 Positive excursions of input voltage may exceed the power supply level As long as the other voltage remains within the common mode range the compara tor will provide a proper output state The low input voltage state must not be less than 0 3 Vpc 0 3 Vpc below the magnitude of the negative power supply if used at TA 2
12. ut sink current capability 30 mA at Vo 2 Vpc Supply Input protected against reverse voltages INPUT DS005226 1 Typical Applications v 5 0 Basic Comparator 05005226 3 Schematic Connection Diagrams OUTPUT 3 OUTPUT 4 GND INPUT 4 INPUT 4 INPUT 3 INPUT 3 10 9 8 INPUT 1 INPUT 1 INPUT 2 INPUT 2 TOP VIEW OUTPUT 2 OUTPUT 1 vt 05005226 2 Order Number LP339M for 5 Package See NS Package Number M14A Order Number LP339N for Dual In Line Package See NS Package Number N14A Driving CMOS DS005226 4 1999 National Semiconductor Corporation DS005226 www national com 19Mod 6EEdT Absolute Maximum Ratings Note 1 If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications 36 or 18 Voc 36 0 3 Vpc to 36 Supply Voltage Differential Input Voltage Input Voltage Power Dissipation Note 2 0 C to 70 C 65 to 150 C Operating Temperature Range Storage Temperature Range Soldering Information Dual In Line Package 10 sec 260 C 5 Package Vapor Phase 60 sec 215 C Infrared 15 sec 220 C See AN 450 Surface Mounting Methods and Their Effect on Product Reliability for other methods of soldering surface
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National Semiconductor LP339 Ultra Low Power Quad Comparator handbook