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MAXIM MAX917 MAX920 Manual

1. MAX917 MAX918 MAX919 MAX920 SUPPLY CURRENT vs SUPPLY CURRENT vs MAX917 MAX918 SUPPLY VOLTAGE AND TEMPERATURE SUPPLY VOLTAGE AND TEMPERATURE SUPPLY CURRENT vs TEMPERATURE 900 5 600 900 3 T 800 i A 85 C 800 B 500 750 70 700 gt gt gt B amp 650 E 5 400 5 600 600 550 500 300 500 15 20 25 30 35 40 45 50 55 15 20 25 30 35 40 45 50 55 4 15 10 3 60 5 SUPPLY VOLTAGE V SUPPLY VOLTAGE V TEMPERATURE C MAX917 MAX918 MAX919 MAX920 MAX919 MAX920 SUPPLY CURRENT vs SUPPLY CURRENT vs SUPPLY CURRENT vs TEMPERATURE OUTPUT TRANSITION FREQUENCY OUTPUT TRANSITION FREQUENCY 550 16 8 14 8 d 14 Vec 5V B 12 Vec 5V 8 E Vec 5V E 450 g 10 g 5 5 g 3V s e Vec o e 400 Veo 1 8V 2 us Voc 3V E 5 B 4 350 2 Voc 1 8V z 300 0 ge B Voc 1 8V 40 5 10 3 60 5 1 0 00 1k 10k 100k 1 10 100 10k 10k TEMPERATURE C OUTPUT TRANSITION FREQUENCY Hz OUTPUT TRANSITION FREQUENCY Hz OUTPUT VOLTAGE LOW vs SINK CURRENT MAX917 MAX919 OUTPUT VOLTAGE LOW vs
2. Voc 5V OV VIN VREF TA 40 C to 85 C unless otherwise noted Typical values are at TA 25 C Note 1 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS High to Low Propagation Delay Vcc 1 8V 17 Note 4 DBs Dez us 25V 22 Vcc 1 8V 30 AX917 only e Voc 5V 95 Low to High Propagation Delay Voc 1 8V Note 4 TD RPuLLuP 100kQ d a AX918 only Vcc SV 120 RPULLUP 100kQ Rise Time tRISE AX917 only CL 15pF 6 us Fall Time tFALL C 15pF 4 us Power Up Time tON 1 2 ms Ta 25 C 1 227 1 245 1 263 Reference Voltage VREF V TA MIN to TMAX 1 200 1 290 Reference Voltage Temperature Coefficient TCREF 95 ppm C Reference Output BW 10Hz to 100kHz 600 en HVRMS Voltage Noise BW 10Hz to 100kHz CREF 1nF 215 Reference Line Regulation AVREF 1 8V lt Vcc lt 5 5V 0 1 mV V AVCC AVREF E Reference Load Regulation AlOUT AlouT 10nA 0 2 mV nA ELECTRICAL CHARACTERISTICS MAX919 MAX920 Voc 5V VEE OV Vom OV TA 40 C to 85 C unless otherwise noted Typical values are at TA 25 C Note 1 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range Vcc Inferred from the PSRR test 1 8 5 5 V Vcc 1 8V 0 38 Supply Current Icc TA 25 C 0 45 0 80 HA Voc 5V TA TMIN to TMAX 1 2 ngut Common Moda V Inferred from the CMRR test VEE 0 2 Vcc 02 V Voltage
3. 40 15 10 35 60 85 TEMPERATURE C TEMPERATURE C CAPACITIVE LOAD nF MAX917 MAX919 MAX917 MAX919 PROPAGATION DELAY tpp PROPAGATION DELAY tpp PROPAGATION DELAY tpp vs CAPACITIVE LOAD vs INPUT OVERDRIVE vs INPUT OVERDRIVE 160 100 2 90 8 m Vcc 5V 80 8 120 100 EY gt 60 E Voc 3V B a Bo i ki 4 Voc 1 8V 40 20 CC 1 20 10 OM 01 1 10 100 1000 50 0 10 2 30 40 50 CAPACITIVE LOAD nF INPUT OVERDRIVE mV INPUT OVERDRIVE mV MAX918 MAX920 MAX918 MAX920 PROPAGATION DELAY tpp vs PROPAGATION DELAY tpp vs PROPAGATION DELAY tpp PULLUP RESISTANCE PULLUP RESISTANCE Vec 5V 250 8 3 200 IN 27 div m 150 i 3 EET OUT 2V div 0k 10 100 1k 10k 20us div RPULLUP MAXIM 7 MAX917 MAX920 SOT23 1 8V Nanopower Beyond the Rails Comparators With Without Reference MAX917 MAX919 PROPAGATION DELAY tpp Voc 5V MAX917 920 toc28 Do IINE 50mV div emen OUT 2V div scree 20us div PROPAGATION DELAY tpp Vec 1 8V MAX917 920 toc31 iir adia rr tea out 20us div MAX917 MAX919 Typical Operating Characteristics continued 5V MAX917 920 toc34 200us div PROPAGATION DELAY tpp
4. PKG CODES U5 1 US 2 m SIDE VIEW e 1 oe FRONT VIEW NOTES ALL DIMENSIONS ARE IN MILLIMETERS FOOT LENGTH MEASURED AT INTERCEPT POINT BETWEEN DATUM A amp LEAD SURFACE 3 PACKAGE OUTLINE EXCLUSIVE OF MOLD FLASH amp METAL BURR MOLD FLASH PROTRUSION OR METAL BURR SHOULD NOT EXCEED 0 25 MM 4 PACKAGE DUTLINE INCLUSIVE OF SOLDER PLATING DDALLAS ZVLAXL VI S MEETS 0178 VARIATION AA PROPRIETARY INFDRMATIDN 6 LEADS TO BE COPLANAR WITHIN 0 10 mm TITLE 7 SOLDER THICKNESS MEASURED AT FLAT SECTION OF LEAD BETWEEN PACKAGE OUTLINE SOT 23 5L DOCUMENT CONTROL NO 21 0057 0 08mm AND 0 15mm FROM LEAD TIP MAXIM 13 MAX917 MAX920 SOT23 1 8V Nanopower Beyond the Rails Comparators With Without Reference Package Information continued For the latest package outline information and land patterns go to www maxim ic com packages Note that a or in the package code indicates RoHS status only Package drawings may show a different suffix character but the drawing pertains to the package regardless of RoHS status 14 nu INCHES E H L c PIN 1 ID i TOP VIEW END VIEW Rv Hi 1 a a ps M a 514 1 514 4 514 5 514 6 S14M 4 S14M 5 P d H S14M 5 S14M 7 bed Abhe SIDE VIEW NOTES ALL DIMENSIONS ARE IN MILLIMETERS UNLESS OT
5. 3V MAX917 920 toc29 I IN 50mV div IN 2V div our 2V div 20us div MAX917 MAX919 PROPAGATION DELAY tpp Vcc 1 8V MAX917 920 toc32 T i i 4 z OUT 1V div reas tree eie a eva eae 20us div 50mV div OUT POWER UP DOWN RESPONSE Vcc 5V VEE OV CL 15pF VOVERDRIVE 100mV TA 25 C unless otherwise noted MAX917 MAX919 PROPAGATION DELAY tpp MAX917 920 toc30 IN 50mV div 2V div 20us div MAX917 MAX919 10kHz RESPONSE Vcc 1 8V MAX917 920 toc33 OUT 1V div eM 20us div MAX917 920 10 35 Vcc 2V div OUT 2V div 40us div AVLAZCLAI SOT23 1 8V Nanopower Beyond the Rails Comparators With Without Reference MAXIM MAX917 MAX918 Functional Diagrams MAXIM MAX919 MAX920 Pin Description OC6XVM Z L6XVIN PIN MAX917 MAX918 MAX919 MAX920 NAME FUNCTION SOT23 5 SO SOT23 5 SO 1 6 1 6 OUT Comparator Output 2 4 2 4 VEE Negative Supply Voltage 3 3 3 3 IN Comparator Noninverting Input 4 2 IN Comparator Inverting Input 4 2 REF 1 245V Reference Output and Comparator Inverting Input 5 7 5 7 Vcc Positive Supply Voltage 1 5 8 1 5 8 N C No Connection Not internally connected Detailed Description The MAX917 MAX918 feature an on board 1 245V
6. 1 5 reference yet draw an ultra low supply current of 750nA The MAX919 MAX920 without reference consume just 380nA of supply current All four devices are guaranteed to operate down to 1 8V Their com mon mode input voltage range extends 200mV beyond the rails Internal hysteresis ensures clean out put switching even with slow moving input signals Large internal output drivers allow rail to rail output swing with up to x8mA loads The output stage employs a unique design that mini mizes supply current surges while switching virtually eliminating the supply glitches typical of many other comparators The MAX917 MAX919 have a push pull MAXIM output stage that sinks as well as sources current The MAX918 MAX920 have an open drain output stage that can be pulled beyond Vcc to an absolute maximum of 6V above VEE These open drain versions are ideal for implementing wire ORed output logic functions Input Stage Circuitry The input common mode voltage range extends from 0 2V to Vcc 0 2V These comparators operate at any differential input voltage within these limits Input bias current is typically 0 15nA if the input voltage is between the supply rails Comparator inputs are pro tected from overvoltage by internal ESD protection diodes connected to the supply rails As the input volt age exceeds the supply rails these ESD protection diodes become forward biased and begin to conduct MAX917 MAX920 SOT23 1
7. TEMPERATURE C TEMPERATURE C MAX917 MAX918 OFFSET VOLTAGE vs TEMPERATURE HYSTERESIS VOLTAGE vs TEMPERATURE REFERENCE VOLTAGE vs TEMPERATURE 2 50 1246 2 45 125 2 z 40 1244 8 7 35 1243 30 1242 25 1241 85 40 15 10 35 60 85 40 15 10 35 60 85 TEMPERATURE C TEMPERATURE C TEMPERATURE C MAX917 MAX918 MAX917 MAX918 MAX917 MAX918 REFERENCE VOLTAGE vs REFERENCE OUTPUT VOLTAGE vs REFERENCE OUTPUT VOLTAGE vs SUPPLY VOLTAGE REFERENCE SOURCE CURRENT REFERENCE SINK CURRENT 2460 1 2440 r 2 1 2435 NS E 12455 2 12 T 12450 gt gt 12425 42445 1 2420 2440 12415 15 20 25 30 35 40 45 50 55 01 2 34526 7 8 9 10 012 34526 7 8 9 10 SUPPLY VOLTAGE V SOURCE CURRENT nA SINK CURRENT nA 6 MAKLM SOT23 1 8V Nanopower Beyond the Rails Comparators With Without Reference Typical Operating Characteristics continued Vcc 5V VEE OV CL 15pF VovERDRIVE 100mV TA 25 C unless otherwise noted MAX917 MAX919 120 100 MAX917 920 toc21 OC6XVM Z L6XVIN MAX917 920 toc19 MAX917 920 toc20 tpp us tpp us PD us 85 001 01 10 100 1000
8. delivery and ordering information please contact Maxim Direct at 1 888 629 4642 or visit Maxim s website at www maxim ic com OC6XVM Z L6XVIN MAX917 MAX920 Output Current Output Short Circuit Duration SOT23 1 8V Nanopower Beyond the Rails Comparators With Without Reference MAX918 MAX920 ABSOLUTE MAXIMUM RATINGS Supply Voltage Vcc to Voltage Inputs IN IN REF Current Into Input Pins Output Voltage MAX917 MAX919 VEE 0 3V to Vcc 0 3V 0 3V to 6V 50 Continuous Power Dissipation TA 70 5 Pin SOT23 derate 7 31mW C above 70 571mW 8 Pin SO derate 5 88mW C above 70 471mW Operating Temperature Range Storage Temperature Range Lead Temperature soldering 10s Soldering Temperature Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied Exposure to absolute maximum rating conditions for extended periods may affect device reliability ELECTRICAL CHARACTERISTICS MAX917 MAX918 Vcc 5V VEE OV VIN VREF TA 40 C to 85 C unless oth
9. 8V Nanopower Beyond the Rails Comparators With Without Reference Output Stage Circuitry The MAX917 MAX920 contain a unique break before make output stage capable of rail to rail operation with up to 8mA loads Many comparators consume orders of magnitude more current during switching than dur ing steady state operation However with this family of comparators the supply current change during an out put transition is extremely small In the Typical Oper ating Characteristics the Supply Current vs Output Transition Frequency graphs show the minimal supply current increase as the output switching frequency approaches 1kHz This characteristic reduces the need for power supply filter capacitors to reduce glitches created by comparator switching currents In battery powered applications this characteristic results in a substantial increase in battery life Reference MAX917 MAX918 The internal reference in the MAX917 MAX918 has an output voltage of 1 245V with respect to VEE Its typi cal temperature coefficient is 95ppm C over the full 40 C to 85 C temperature range The reference is a PNP emitter follower driven by a 120nA current source Figure 1 The output impedance of the voltage refer ence is typically 200kO preventing the reference from driving large loads The reference can be bypassed with a low leakage capacitor The reference is stable for any capacitive load For applications requiring a lower output impedanc
10. Range eM BEDS PE 0 2V lt VcM lt TA 25 C 1 5 nput Offset Voltage V mV 9 95 Vcc 0 2V Note 2 TA Tmin to TMAX 10 nput Referred Hysteresis VHB 0 2V lt Vom lt Vcc 0 2V Note 3 4 mV 25 0 15 1 nput Bias Current IB nA A TMIN to TMAX 2 MAXIM OC6XVM Z L6XVIN MAX917 MAX920 SOT23 1 8V Nanopower Beyond the Rails Comparators With Without Reference ELECTRICAL CHARACTERISTICS MAX919 MAX920 continued Vcc 5V VEE OV Vom OV TA 40 C o 85 C unless otherwise noted Typical values are at TA 25 C Note 1 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Offset Current los 10 pA Power Supply Rejection Ratio PSRR Vcc 1 8V to 5 5V 0 1 1 mV V Common Mode Rejection Ratio CMRR VEE 0 2V lt Vom lt Vcc 0 2V 0 5 3 mV V MAX919 only Vcc TA 25 C 190 400 SV ISOURCE 8mA to TMAX 500 Output Voltage Swing High Voc 5 mV MAX919 only Vcc TA 25 C 55 200 1 8V IsoURCE 1mA TA TMIN to TMAX 300 Voc 5V TA 25 C 190 400 ISINK 8mA to 500 Output Voltage Swing Low VOL mV Vcc 1 8V Ta 25 C 55 200 ISINK 1mA TA to TMAX 300 Output Leakage Current ILEAK MAX920 only Vo 5 5V 0 001 1 HA Vcc 5V 95 Sourcing Vo VEE ay 8 Output Short Circuit Cur
11. SINK CURRENT AND TEMPERATURE OUTPUT VOLTAGE HIGH vs SOURCE CURRENT 450 5 600 0 6 2 Voc 1 8V 8 8 redd 8 400 L Voc 1 ered 500 05 350 sy E Vec 25V Vec 3V Vcc 5V 300 400 04 250 E Z 300 7 03 gt 200 gt S d 150 200 02 100 100 01 50 0 0 0 0 2 4 8 10 12 14 16 0 2 4 6 8 10 12 14 16 0 2 4 6 8 10 12 14 16 18 20 SINK CURRENT mA SINK CURRENT mA SOURCE CURRENT mA AVLAZCLAVI 5 MAX917 MAX920 SOT23 1 8V Nanopower Beyond the Rails Comparators With Without Reference Typical Operating Characteristics continued Vcc 5V VEE OV CL 15pF VovERDRIVE 100mV TA 25 C unless otherwise noted MAX917 MAX919 MAX917 MAX919 OUTPUT VOLTAGE HIGH vs SHORT CIRCUIT SINK CURRENT SHORT CIRCUIT SOURCE CURRENT SOURCE CURRENT AND TEMPERATURE vs TEMPERATURE vs TEMPERATURE 0 6 120 140 3 d 120 05 2 m Vec 5V E an 100 04 25 80 E Ta 25 C E i 03 Ta 85 C 6 E S s 02 B 4 3 3V A 40 C 20 me nee a VWee 18V 0 U U 0 2 4 6 8 10 12 14 16 18 20 40 5 10 35 60 85 SEC M i 3 2 5 SOURCE CURRENT mA
12. 19 1512 Rev 2 10 10 SOT23 1 8V Nanopower Beyond the Rails Comparators With Without Reference General Description The MAX917 MAX920 nanopower comparators in space saving SOT23 packages feature Beyond the Rails inputs and are guaranteed to operate down to 1 8V The MAX917 MAX918 feature an on board 1 245V 1 5 reference and draw an ultra low supply current of only 750nA while the MAX919 MAX920 with out reference require just 380nA of supply current These features make the MAX917 MAX920 family of comparators ideal for all 2 cell battery applications including monitoring management The unique design of the output stage limits supply cur rent surges while switching virtually eliminating the supply glitches typical of many other comparators This design also minimizes overall power consumption under dynamic conditions The MAX917 MAX919 have a push pull output stage that sinks and sources current Large internal output drivers allow rail to rail output swing with loads up to 8mA The MAX918 MAX920 have an open drain output stage that makes them suit able for mixed voltage system design Applications 2 Cell Battery Monitoring Management Ultra Low Power Systems Mobile Communications Notebooks and PDAs Threshold Detectors Discriminators Sensing at Ground or Supply Line Telemetry and Remote Systems Medical Instruments Selector Guide INTERNAL TPUT SURELY FART REFERENCE pid T MAX917 Yes Pu
13. HERWISE SPECIFIED MATERIAL MUST COMPLY WITH BANNED AND RESTRICTED SUBSTANCES SPEC 10 0131 16 1 916 3 169 SI6 6 PEG 6 8 516 7 SI amp 9F DIMENSIONS D AND E DO NOT INCLUDE MOLD PROTRUSION 16 1DF 16M 3 S16M 6 ALLOWABLE MOLD PROTRUSION IS 0 15 MM CODB gt PER SIDE LEADS TO BE COPLANAR WITHIN 1 6004 IM AXi ZV TITLE MEETS JEDEC 5012 ened PACKAGE OUTLINE ALL DIMENSIONS APPLY TO BOTH LEADED t gt AND PbFREE PKG CODES BL 14L 16L SOIC 150 INCH DRAWNG NOT TO SCALE ME are MAXIM SOT23 1 8V Nanopower Beyond the Rails Comparators With Without Reference Revision History REVISION REVISION PAGES NUMBER DATE DESCRIPTION CHANGED 10 10 Added lead free and automotive qualified parts Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product No circuit patent licenses are implied Maxim reserves the right to change the circuitry and specifications without notice at any time 15 Maxim Integrated Products 120 San Gabriel Drive Sunnyvale CA 94086 408 737 7600 2010 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products Inc OC6XVM Z L6XVIN
14. TY MAX917 MAX918 MAX919 MAX920 RECHARGEABLE Ww END LIFE AASIZE OPERATING TIME OPERATING TIME mA h hr hr Alkaline 6 6 2 Cells No 3 0 1 8 2000 25x10 5x10 Nickel Cadmium 6 2 Cells Yes 24 1 8 750 937 500 1 875 x 10 Lithium lon 6 6 1 Cell Yes 3 5 27 1000 1 25 x 10 2 5 x 10 Nickel Metal Hyaride Yes 2 4 1 8 1000 1 25 x 106 2 5 x 106 2 Cells 10 MAXIM SOT23 1 8V Nanopower Beyond the Rails Comparators With Without Reference THRESHOLDS HYSTERESIS Figure 2 Threshold Hysteresis Band Additional Hysteresis MAX917 MAX919 The MAX917 MAX919 have a 4mV internal hysteresis band VHB Additional hysteresis can be generated with three resistors using positive feedback Figure 3 Unfortunately this method also slows hysteresis re sponse time Use the following procedure to calculate resistor values 1 Select R3 Leakage current at IN is under 2nA so the current through R3 should be at least 0 2uA to minimize errors caused by leakage current The cur rent through at the trip point is VREF VoUT R3 Considering the two possible output states in solving for yields two formulas VREF IR3 or R3 Vcc VREF IR3 Use the smaller of the two resulting resistor values For example when using the MAX917 VREF 1 245V and Vcc 5V and if we choose IR3 1 then the two resistor values are 1 2MQ and 3 8MQ Choose a 1 2MQ standard value for R3 2 Choose th
15. e buffer the reference with a low input leakage op amp such as the MAX406 Applications Information Low Voltage Low Power Operation The MAX917 MAX920 are ideally suited for use with most battery powered systems Table 1 lists a variety of battery types capacities and approximate operating times for the MAX917 MAX920 assuming nominal conditions Figure 1 MAX917 MAX918 Voltage Reference Output Equivalent Circuit Internal Hysteresis Many comparators oscillate in the linear region of oper ation because of noise or undesired parasitic feed back This tends to occur when the voltage on one input is equal or very close to the voltage on the other input The MAX917 MAX920 have internal hysteresis to counter parasitic effects and noise The hysteresis in a comparator creates two trip points one for the rising input voltage VrHR and one for the falling input voltage VTHF Figure 2 The difference between the trip points is the hysteresis VHB When the comparator s input voltages are equal the hystere sis effectively causes one comparator input to move quickly past the other thus taking the input out of the region where oscillation occurs Figure 2 illustrates the case in which IN has a fixed voltage applied and IN is varied If the inputs were reversed the figure would be the same except with an inverted output Table 1 Battery Applications Using MAX917 MAX920 9 V CAPACI
16. e hysteresis band required VHB For this example choose 50mV 3 Calculate R1 according to the following equation R1 VHB Vcc For this example insert the values R1 1 2MQ 50mV 5V 12kQ 4 Choose the trip point for Vin rising VTHR such that VTHR gt VREF R1 is the trip point for VIN falling This is the threshold voltage at which the comparator switches its output from low to high as VIN rises above the trip point For this example choose 3V 5 Calculate R2 as follows R2 1 VTHR VREF R1 1 R1 1 R3 MAXI MAXIM MAX917 MAX919 Figure 3 MAX917 MAX919 Additional Hysteresis R2 1 3 0V 1 2V 12kQ 1 12kQ 1 1 2MQ 8 05kQ For this example choose an 8 2kQ standard value 6 Verify the trip voltages and hysteresis as follows VIN rising VrHR VREF R1 1 R1 1 R2 1 R3 VIN falling VrHF VrHR R1 Voc R3 Hysteresis VTHR VTHF Additional Hysteresis MAX918 MAX920 The MAX918 MAX920 have a 4mV internal hysteresis band They have open drain outputs and require an external pullup resistor Figure 4 Additional hysteresis can be generated using positive feedback but the for mulas differ slightly from those of the MAX917 MAX919 Use the following procedure to calculate resistor values 1 Select R3 according to the formulas R3 VREF 1uA or R3 Vcc VREF 1uA R4 Use the smaller of the two res
17. erwise noted Typical values are at TA 25 C Note 1 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range Vcc Inferred from the PSRR test 1 8 5 5 V Vcc 1 8V 0 75 Supply Current Icc TA 25 C 0 80 1 30 UA Voc 5V TA TMIN to TMAX 1 60 N Voltage Range VIN Inferred from the output swing test VEE 0 2 Vcc 0 2 V TA 25 C 1 5 nput Offset Voltage Vos Note 2 mV TA TMIN to TMAX 10 nput Referred Hysteresis VHB Note 3 4 mV TA 25 C 0 15 1 nput Bias Current IB nA TA TMIN to TMAX 2 Power Supply Rejection Ratio PSRR Vcc 1 8V to 5 5V 0 1 1 mV V MAX917 only 25 C 190 400 SV ISOURCE 8mA TA TMIN to TMAX 500 Output Voltage Swing High Voc i mV MAX917 only 25 C 55 200 1 8V lsoURCE 1mA TA TMIN to TMAX 300 Vcc 5V TA 25 C 190 400 f ISINK 8mA TA TMIN to TMAX 500 Output Voltage Swing Low VoL mV Vcc 1 8V TA 25 C 55 200 ISINK 1mA to TMAX 300 Output Leakage Current ILEAK MAX918 only Vo 5 5V 0 001 1 HA Vcc 5V 95 Sourcing Vo VEE a P Vcc 1 8V 8 Output Short Circuit Current Isc mA i Voc 5V 98 Sinking Vo Vcc Vcc 1 8V 10 2 MAKII SOT23 1 8V Nanopower Beyond the Rails Comparators With Without Reference ELECTRICAL CHARACTERISTICS MAX917 MAX918 continued
18. ground and its noninverting input is connected to a 100mVp P signal source As the signal at the noninverting input crosses OV the comparator s output changes state Logic Level Translator The Typical Application Circuit shows an application that converts 5V logic to 3V logic levels The MAX920 is powered by the 5V supply voltage and the pullup resistor for the MAX920 s open drain output is connect ed to the 3V supply voltage This configuration allows the full 5V logic swing without creating overvoltage on the 3V logic inputs For 3V to 5V logic level translations simply connect the 3V supply voltage to Vcc and the 5V supply voltage to the pullup resistor 100mVp p MAXIM MAX919 Figure 5 Zero Crossing Detector Typical Application Circuit 3 5V MAXIM MAX920 VEE 5V 3V LOGIC IN LOGIC LEVEL TRANSLATOR MAXIM SOT23 1 8V Nanopower Beyond the Rails Comparators With Without Reference Package Information For the latest package outline information and land patterns go to www maxim ic com packages Note that or in the package code indicates RoHS status only Package drawings may show a different suffix character but the drawing pertains to the package regardless of RoHS status PACKAGE TYPE PACKAGE CODE OUTLINE NO LAND PATTERN NO 8 SO S842 21 0041 90 0096 SOT23 U5 1 21 0057 SOT 23 5L EPS OC6XVM Z L6XVIA 0 95 BSC 190 BSC
19. rent Isc mA e Voc 5V 98 Sinking Vo Vcc 1 8V 10 High to Low Propagation Delay Vcc 1 8V 17 tPD Us Note 4 Vcc 5V 22 Vcc 1 8V 30 MAX919 only 28 Voc 5V 95 Low to High Propagation Delay Vcc 1 8V Note 4 PD RPULLUP 100kQ e Hs MAX920 only Voc 5V RPULLUP 100kQ 12 Rise Time tRISE MAX919 only CL 15pF 6 us Fall Time tFALL CL 15pF 4 us Power Up Time ton ms Note 1 All specifications are 10096 tested at TA 25 C Specification limits over temperature TA TMIN to TMAX are guaranteed by design not production tested Note 2 Vos is defined as the center of the hysteresis band at the input Note 3 The hysteresis related trip points are defined as the edges of the hysteresis band measured with respect to the center of the band i e Vos Figure 2 Note 4 Specified with an input overdrive VovERDRIVE of 100mV and load capacitance of CL 15pF VoyEnpnIvE is defined above and beyond the offset voltage and hysteresis of the comparator input For the MAX917 MAX918 reference voltage error should also be added MAXIM SOT23 1 8V Nanopower Beyond the Rails Comparators With Without Reference Typical Operating Characteristics Voc 5V VEE OV CL 15pF VovERDRIVE 100mV TA 25 C unless otherwise noted OC6XVM Z L6XVIN
20. sh Pull 750 MAX918 Yes Open Drain 750 MAX919 No Push Pull 380 MAX920 No Open Drain 380 Typical Application Circuit appears at end of data sheet Beyond the Fails is a trademark of Maxim Integrated Products Inc MAXIM MA AALMNI Features Ultra Low Supply Current 380nA per Comparator MAX919 MAX920 750nA per Comparator with Reference MAX917 MAX918 Guaranteed to Operate Down to 1 8V Internal 1 245V 1 5 Reference MAX917 MAX918 Input Voltage Range Extends 200mV Beyond the Rails CMOS Push Pull Output with 8mA Drive Capability MAX917 MAX919 Open Drain Output Versions Available MAX918 MAX920 Crowbar Current Free Switching Internal Hysteresis for Clean Switching No Phase Reversal for Overdriven Inputs Space Saving SOT23 Package Ordering Information TOP PKG MARK CODE MAX917EUK T 5 SOT23 ADIQ U5 1 AX917ESA 8 SO MAX918EUK T 5 SOT AX918ESA 8 SO MAX919EUK T 5SOT AX919EUK V T 5SOT AX919ESA 8 SO MAX920EUK T 5 SOT AX920ESA 8 SO Note All devices are specified over the 40 C to 85 C operating temperature range Denotes a leaa Pb free RoHS compliant package V denotes an automotive qualified part Pin Configurations PART PIN PACKAGE TOP VIEW MAXIM MAX917 MAX918 MAX919 MAX920 SOT23 ARE FOR MAX917 MAX918 Pin Configurations continue at end of data sheet Maxim Integrated Products 1 For pricing
21. ulting resistor values 2 Choose the hysteresis band required VHB 3 Calculate R1 according to the following equation R1 R4 VHB Vcc 4 Choose the trip point for Vin rising VTHR VTHF is the trip point for VIN falling This is the threshold voltage at which the comparator switches its output from low to high as VIN rises above the trip point 5 Calculate R2 as follows R2 i Hs OC6XVM Z L6XVIN MAX917 MAX920 SOT23 1 8V Nanopower Beyond the Rails Comparators With Without Reference 6 Verify the trip voltages and hysteresis as follows 1 1 1 VN rising V W LRU IN 9 VTHR REF R2 a VN falling VTHF 1 1 1 R1 i e Fm x Vec R1 R2 R3 R4 Hysteresis VTHR VTHF Board Layout and Bypassing Power supply bypass capacitors are not typically needed but use 100nF bypass capacitors close to the device s supply pins when supply impedance is high supply leads are long or excessive noise is expected on the supply lines Minimize signal trace lengths to reduce stray capacitance A ground plane and sur face mount components are recommended MAXIM MAX918 MAX920 Figure 4 MAX918 MAX920 Additional Hysteresis Pin Configurations continued TOP VIEW MAXIM MAX917 MAX918 MAX919 MAX920 ARE FOR MAX917 MAX918 12 Zero Crossing Detector Figure 5 shows a zero crossing detector application The MAX919 s inverting input is connected to

MAXIM MAX917 MAX920 Manual

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