19-1862; Rev 4; 1/07 SC70, 1.6V, Nanopower, Beyond-the-Rails Comparators With/Without Reference The MAX9117-MAX9120 nanopower comparators in space-saving SC70 packages feature Beyond-theRailsTM inputs and are guaranteed to operate down to +1.6V. The MAX9117/MAX9118 feature an on-board 1.252V 1.75% reference and draw an ultra-low supply current of only 600nA, while the MAX9119/MAX9120 (without reference) require just 350nA of supply current. These features make the MAX9117-MAX9120 family of comparators ideal for all 2-cell battery-monitoring/management applications. The unique design of the output stage limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. This design also minimizes overall power consumption under dynamic conditions. The MAX9117/MAX9119 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 5mA. The MAX9118/MAX9120 have an open-drain output stage that makes them suitable for mixed-voltage system design. All devices are available in the ultra-small 5-pin SC70 package. Features Space-Saving SC70 Package (Half the Size of SOT23) Ultra-Low Supply Current 350nA Per Comparator (MAX9119/MAX9120) 600nA Per Comparator with Reference (MAX9117/MAX9118) Guaranteed to Operate Down to +1.6V Internal 1.252V 1.75% Reference (MAX9117/MAX9118) Input Voltage Range Extends 200mV Beyond-the-Rails CMOS Push-Pull Output with 5mA Drive Capability (MAX9117/MAX9119) Open-Drain Output Versions Available (MAX9118/MAX9120) Crowbar-Current-Free Switching Internal Hysteresis for Clean Switching No Phase Reversal for Overdriven Inputs Ordering Information Applications PINPACKAGE PART 2-Cell Battery Monitoring/Management Ultra-Low-Power Systems MAX9117EXK-T 5 SC70-5 TOP MARK PKG CODE ABW X5-1 -- S8-2 Mobile Communications MAX9117ESA+ 8 SO Notebooks and PDAs MAX9118EXK-T 5 SC70-5 ABX X5-1 MAX9119EXK-T 5 SC70-5 ABY X5-1 MAX9120EXK-T 5 SC70-5 ABZ X5-1 MAX9120ESA+ 8 SO -- S8-2 Threshold Detectors/Discriminators Sensing at Ground or Supply Line Telemetry and Remote Systems Note: All devices specified for over -40C to +85C operating temperature range. +Denotes lead-free package. Medical Instruments Selector Guide Pin Configurations PART INTERNAL REFERENCE OUTPUT TYPE SUPPLY CURRENT (nA) TOP VIEW MAX9117 Yes Push-Pull 600 OUT 1 MAX9118 Yes Open-Drain 600 MAX9119 No Push-Pull 350 MAX9120 No Open-Drain 350 VEE 2 5 VCC 8 N.C. 7 VCC IN+ 3 6 OUT VEE 4 5 N.C. IN- (REF) 2 MAX9117 MAX9118 MAX9119 MAX9120 IN+ 3 N.C. 1 4 IN- (REF) MAX9117 MAX9120 Typical Application Circuit appears at end of data sheet. Beyond-the-Rails is a trademark of Maxim Integrated Products, Inc. SC70 SO ( ) ARE FOR MAX9117/MAX9118. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. 1 MAX9117-MAX9120 General Description MAX9117-MAX9120 SC70, 1.6V, Nanopower, Beyond-the-Rails Comparators With/Without Reference ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC to VEE)..................................................+6V Voltage Inputs (IN+, IN-, REF) .........(VEE - 0.3V) to (VCC + 0.3V) Output Voltage MAX9117/MAX9119 ....................(VEE - 0.3V) to (VCC + 0.3V) MAX9118/MAX9120 ..................................(VEE - 0.3V) to +6V Current Into Input Pins......................................................20mA Output Current..................................................................50mA Output Short-Circuit Duration .................................................10s Continuous Power Dissipation (TA = +70C) 5-Pin SC70 (derate 2.5mW/C above +70C) .............200mW 8-Pin SO (derate 5.88mW/C above +70C)...............471mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C 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--MAX9117/MAX9118 (with REF) (VCC = +5V, VEE = 0V, VIN+ = VREF, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER Supply Voltage Range SYMBOL VCC CONDITIONS Inferred from the PSRR TA = +25C test TA = TMIN to TMAX VCC = 1.6V Supply Current ICC VCC = 5V 1.6 5.5 1.8 5.5 1 0.68 1.3 TA = TMIN to TMAX Input Offset Voltage VOS (Note 2) Input-Referred Hysteresis VHB (Note 3) TA = +25C VEE 0.2 VCC + 0.2 1 4 TA = TMIN to TMAX 0.1 VCC - VOH VCC = 5V, ISINK= 5mA ISINK= 1mA ISC Sinking, VO = VCC High-to-Low Propagation Delay (Note 4) 2 tPD- 1 190 TA = TMIN to TMAX VCC = 1.6V, TA = +25C TA = +25C 100 190 VCC = 5V VCC = 1.6V mV 400 500 100 VCC = 1.8V, TA = TMIN to TMAX VCC = 1.6V 200 300 TA = TMIN to TMAX VCC = 5V 400 500 VCC = 1.8V, TA = TMIN to TMAX MAX9118 only, VO = 5.5V Sourcing, VO = VEE Output Short-Circuit Current TA = +25C VCC = 1.6V, TA = +25C VOL ILEAK nA mV/V MAX9117, ISOURCE = 1mA Output Leakage Current mV 1 PSRR MAX9117, VCC = 5V, ISOURCE = 5mA Output Voltage Swing Low V mV 1 2 VCC = 1.8V to 5.5V, TA = TMIN to TMAX Output Voltage Swing High 5 10 0.15 VCC = 1.6V to 5.5V, TA = +25C A 1.6 TA = TMIN to TMAX TA = +25C UNITS V 0.60 Inferred from output swing test Power-Supply Rejection Ratio MAX TA = +25C VIN+ IB TYP TA = +25C IN+ Voltage Range Input Bias Current MIN 200 mV 300 0.002 1 A 35 3 35 mA 3 VCC = 1.6V 16 VCC = 5V 14 _______________________________________________________________________________________ s SC70, 1.6V, Nanopower, Beyond-the-Rails Comparators With/Without Reference (VCC = +5V, VEE = 0V, VIN+ = VREF, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER SYMBOL CONDITIONS MAX9117 only Low-to-High Propagation Delay (Note 4) tPD+ MIN TYP VCC = 1.6V 15 VCC = 5V 40 VCC = 1.6V, RPULLUP = 100k 16 VCC = 5V, RPULLUP = 100k 45 MAX UNITS s MAX9118 only Rise Time tRISE MAX9117 only, CL = 15pF 1.6 s Fall Time tFALL CL = 15pF 0.2 s Power-Up Time tON Reference Voltage VREF Reference Voltage Temperature Coefficient TCREF Reference Output Voltage Noise EN 1.2 TA = +25C 1.230 TA = TMIN to TMAX 1.196 1.252 ms 1.274 1.308 V ppm/ C 100 BW = 10Hz to 100kHz 1.1 BW = 10Hz to 100kHz, CREF = 1nF 0.2 0.25 mV/V 1 mV/ nA Reference Line Regulation VREF/ VCC VCC = 1.6V to 5.5V Reference Load Regulation VREF/ IOUT IOUT = 10nA mVRMS ELECTRICAL CHARACTERISTICS--MAX9119/MAX9120 (without REF) (VCC = +5V, VEE = 0V, VCM = 0V, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER Supply Voltage Range SYMBOL VCC CONDITIONS Inferred from the PSRR test MIN ICC VCC = 5V 1.6 5.5 TA = TMIN to TMAX 1.8 5.5 Inferred from the CMRR test Input Offset Voltage VOS -0.2V VCM (VCC + 0.2V) (Note 2) Input Bias Current VHB IB Input Offset Current TA = +25C 0.80 0.80 VCC + 0.2 1 5 -0.2V VCM (VCC + 0.2V) (Note 3) TA = +25C 10 4 0.15 TA = TMIN to TMAX mV 1 2 75 0.1 nA pA 1 PSRR mV/V VCC = 1.8V to 5.5V, TA = TMIN to TMAX CMRR V mV VCC = 1.6V to 5.5V, TA = +25C Common-Mode Rejection Ratio A 1.2 VEE 0.2 TA = TMIN to TMAX IOS Power-Supply Rejection Ratio 0.35 0.45 TA = TMIN to TMAX VCM UNITS V TA = +25C Input Common-Mode Voltage Range Input-Referred Hysteresis MAX TA = +25C VCC = 1.6V, TA = +25C Supply Current TYP (VEE - 0.2V) VCM (VCC + 0.2V) 1 0.5 3 mV/V _______________________________________________________________________________________ 3 MAX9117-MAX9120 ELECTRICAL CHARACTERISTICS--MAX9117/MAX9118 (with REF) (continued) MAX9117-MAX9120 SC70, 1.6V, Nanopower, Beyond-the-Rails Comparators With/Without Reference ELECTRICAL CHARACTERISTICS--MAX9119/MAX9120 (without REF) (continued) (VCC = +5V, VEE = 0V, VCM = 0V, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER SYMBOL CONDITIONS MAX9119 only, VCC = 5V, ISOURCE = 5mA Output Voltage Swing High VCC VOH MAX9119 only, ISOURCE = 1mA VCC = 5V, ISINK = 5mA Output Voltage Swing Low VOL ISINK = 1mA Output Leakage Current ILEAK ISC Sourcing, VO = VCC High-to-Low Propagation Delay (Note 4) tPDMAX9119 only Low-to-High Propagation Delay (Note 4) tPD+ MAX9120 only VCC = 1.6V, TA = +25C MAX 190 400 TA = +25C VCC = 1.6V, TA = +25C 100 190 100 0.001 3 VCC = 1.6V 3 VCC = 1.6V 16 VCC = 5V 14 VCC = 1.6V 15 VCC = 5V 40 VCC = 1.6V, RPULLUP = 100k 16 VCC = 5V, RPULLUP = 100k 45 CL = 15pF 200 mV 1 A 35 35 tFALL 400 300 VCC = 5V Fall Time mV 500 VCC = 1.6V MAX9119 only, CL = 15pF 200 300 VCC = 1.8V, TA = TMIN to TMAX VCC = 5V UNITS 500 TA = TMIN to TMAX tRISE tON TYP VCC = 1.8V, TA = TMIN to TMAX Rise Time Power-Up Time MIN TA = TMIN to TMAX MAX9120 only, VO = 5.5V Sourcing, VO = VEE Output Short-Circuit Current TA = +25C 1.6 mA s s s 0.2 s 1.2 ms Note 1: All specifications are 100% tested at TA = +25C. 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. VOVERDRIVE is defined above and beyond the offset voltage and hysteresis of the comparator input. For the MAX9117/MAX9118, reference voltage error should also be added. 4 _______________________________________________________________________________________ SC70, 1.6V, Nanopower, Beyond-the-Rails Comparators With/Without Reference MAX9119/MAX9120 SUPPLY CURRENT vs. SUPPLY VOLTAGE AND TEMPERATURE 800 750 TA = +25C 700 650 500 TA = +85C 450 TA = +25C 400 350 850 TA = -40C TA = -40C 600 MAX9117-20 toc02 TA = +85C 850 900 SUPPLY CURRENT (nA) 250 2.0 2.5 3.0 3.5 4.0 4.5 5.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 -40 -15 10 35 60 85 SUPPLY VOLTAGE (V) TEMPERATURE (C) MAX9119/MAX9120 SUPPLY CURRENT vs. TEMPERATURE MAX9117/MAX9118 SUPPLY CURRENT vs. OUTPUT TRANSITION FREQUENCY MAX9119/MAX9120 SUPPLY CURRENT vs. OUTPUT TRANSITION FREQUENCY 400 350 300 VCC = +1.8V 25 20 VCC = +5V 15 10 VCC = +3V 30 5 VCC = +1.8V 250 10 35 60 VCC = +3V VOL (mV) 300 10 VCC = +3V 10k 100k 1 10 100 1k 10k 100k OUTPUT TRANSITION FREQUENCY (Hz) OUTPUT VOLTAGE LOW vs. SINK CURRENT AND TEMPERATURE MAX9117/MAX9119 OUTPUT VOLTAGE HIGH vs. SOURCE CURRENT 0.7 0.6 0.5 TA = +25C 400 VCC = +1.8V 1k 500 500 400 100 MAX9117-20 toc08 600 10 600 MAX9117-20 toc07 700 VCC = +5V 15 OUTPUT TRANSITION FREQUENCY (Hz) TEMPERATURE (C) OUTPUT VOLTAGE LOW vs. SINK CURRENT 20 0 1 85 VCC - VOH (V) -15 VCC = +1.8V 25 5 0 -40 MAX9117-20 toc06 MAX9117-20 toc05 30 35 SUPPLY CURRENT (A) VCC = +5V 450 VCC = +3V 35 SUPPLY CURRENT (A) MAX9117-20 toc04 500 SUPPLY CURRENT (nA) 2.0 SUPPLY VOLTAGE (V) 550 VOL (mV) 650 550 1.5 5.5 VCC = +3V 700 600 550 1.5 750 VCC = +1.8V 300 500 VCC = +5V 800 TA = +85C 300 MAX9117-20 toc09 SUPPLY CURRENT (nA) 900 550 SUPPLY CURRENT (nA) MAX9117-20 toc01 950 MAX9117/MAX9118 SUPPLY CURRENT vs. TEMPERATURE MAX9117-20 toc03 MAX9117/MAX9118 SUPPLY CURRENT vs. SUPPLY VOLTAGE AND TEMPERATURE VCC = +3V 0.4 VCC = +1.8V 0.3 200 200 0.2 100 VCC = +5V 100 0 0 0 1 2 3 4 5 6 7 SINK CURRENT (mA) 8 9 10 VCC = +5V 0.1 TA = -40C 0 0 1 2 3 4 5 6 7 SINK CURRENT (mA) 8 9 10 0 1 2 3 4 5 6 7 8 9 10 SOURCE CURRENT (mA) _______________________________________________________________________________________ 5 MAX9117-MAX9120 Typical Operating Characteristics (VCC = +5V, VEE = 0V, CL = 15pF, VOVERDRIVE = 100mV, TA = +25C, unless otherwise noted.) Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0V, CL = 15pF, VOVERDRIVE = 100mV, TA = +25C, unless otherwise noted.) SHORT-CIRCUIT SINK CURRENT vs. TEMPERATURE TA = +25C TA = +85C 0.2 30 25 20 15 VCC = +3V 10 1 2 3 4 5 6 7 8 9 10 25 20 VCC = +3V 15 VCC = +1.8V 0 -40 -15 10 35 60 85 -40 -15 10 35 60 85 SOURCE CURRENT (mA) TEMPERATURE (C) TEMPERATURE (C) OFFSET VOLTAGE vs. TEMPERATURE HYSTERESIS VOLTAGE vs. TEMPERATURE MAX9117/MAX9118 REFERENCE VOLTAGE vs. TEMPERATURE 0.9 1.258 VHB (mV) 0.7 0.6 4.5 4.0 0.5 0.4 VCC = +5V -40 -15 10 35 60 1.252 VCC = +3V VCC = +1.8V 1.250 1.248 1.246 1.242 3.0 -40 85 1.254 1.244 3.5 0.3 0.2 VCC = +5V 1.256 5.0 VCC = +3V 0.8 MAX9117-20 toc15 5.5 REFERENCE VOLTAGE (V) VCC = +1.8V 1.260 MAX9117-20 toc14 1.1 1.0 6.0 MAX9117-20 toc13 1.2 -15 10 35 60 1.240 -40 85 -15 10 35 60 85 TEMPERATURE (C) TEMPERATURE (C) TEMPERATURE (C) MAX9117/MAX9118 REFERENCE VOLTAGE vs. SUPPLY VOLTAGE MAX9117/MAX9118 REFERENCE OUTPUT VOLTAGE vs. REFERENCE SOURCE CURRENT MAX9117/MAX9118 REFERENCE OUTPUT VOLTAGE vs. REFERENCE SINK CURRENT 1.252 1.251 1.250 1.249 1.5 1.256 1.254 1.252 1.250 VCC = +1.8V, +3V 1.248 VCC = +5V 1.246 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE (V) 5.0 5.5 1.258 1.256 VCC = +5V 1.254 1.252 1.250 VCC = +3V VCC = +1.8V 1.248 1.246 1.244 1.244 1.242 1.242 1.240 2.0 1.260 MAX9117-20 toc18 MAX9117-20 toc17 1.258 REFERENCE VOLTAGE (V) 1.253 1.260 REFERENCE VOLTAGE (V) MAX9117-20 toc16 1.254 6 30 5 0 0 VCC = +5V 35 10 VCC = +1.8V 5 0 VOS (mV) 45 40 TA = -40C 0.1 MAX9117-20 toc12 VCC = +5V 50 SOURCE CURRENT (mA) 0.4 0.3 35 SINK CURRENT (mA) 0.5 VCC - VOH (V) 40 MAX9117-20 toc10 0.6 MAX9117/MAX9119 SHORT-CIRCUIT SOURCE CURRENT vs. TEMPERATURE MAX9117-20 toc11 MAX9117/MAX9119 OUTPUT VOLTAGE HIGH vs. SOURCE CURRENT AND TEMPERATURE REFERENCE VOLTAGE (V) MAX9117-MAX9120 SC70, 1.6V, Nanopower, Beyond-the-Rails Comparators With/Without Reference 1.240 0 1 2 3 4 5 6 7 SOURCE CURRENT (nA) 8 9 10 0 1 2 3 4 5 6 7 SINK CURRENT (nA) _______________________________________________________________________________________ 8 9 10 SC70, 1.6V, Nanopower, Beyond-the-Rails Comparators With/Without Reference MAX9117/MAX9119 PROPAGATION DELAY (tPD+) vs. TEMPERATURE 26 24 50 16 30 VCC = +3V 10 10 -15 10 35 60 20 -40 -15 10 35 60 0 0.01 85 0.1 1 10 CAPACITIVE LOAD (nF) MAX9117/MAX9119 PROPAGATION DELAY (tPD+) vs. CAPACITIVE LOAD PROPAGATION DELAY (tPD-) vs. INPUT OVERDRIVE MAX9117/MAX9119 PROPAGATION DELAY (tPD+) vs. INPUT OVERDRIVE 70 40 30 80 VCC = +3V VCC = +5V 60 tPD+ (s) tPD- (s) 100 50 VCC = +1.8V 40 20 10 100 0 0 1000 VCC = +1.8V 5 VCC = +3V 10 1 VCC = +3V 20 10 40 0.1 25 15 VCC = +5V 30 20 VCC = +5V 35 60 120 10 20 30 40 50 0 10 20 30 INPUT OVERDRIVE (mV) INPUT OVERDRIVE (mV) MAX9118/MAX9120 PROPAGATION DELAY (tPD-) vs. PULLUP RESISTANCE MAX9118/MAX9120 PROPAGATION DELAY (tPD+) vs. PULLUP RESISTANCE PROPAGATION DELAY (tPD-) (VCC = +5V) MAX9117-20 toc26 MAX9117-20 toc25 VCC = +1.8V 80 tPD+ (s) VCC = +3V 50 MAX9117-20 toc27 100 IN+ (50mV/div) 13 tPD- (s) 40 CAPACITIVE LOAD (nF) 15 1000 MAX9117-20 toc24 80 MAX9117-20 toc23 VCC = +1.8V 140 12 100 TEMPERATURE (C) 160 14 VCC = +5V TEMPERATURE (C) 180 0 0.01 VCC = +3V 40 VCC = +1.8V 0 85 MAX9117-20 toc22 -40 100 60 VCC = +5V 8 120 80 20 12 tPD+ (s) 140 VCC = +3V 14 VCC = +1.8V 160 tPD- (s) 18 180 VCC = +5V 40 VCC = +1.8V tPD+ (s) tPD- (s) 22 20 200 MAX9117-20 toc20 60 MAX9117-20 toc19 28 PROPAGATION DELAY (tPD-) vs. CAPACITIVE LOAD MAX9117-20 toc21 PROPAGATION DELAY (tPD-) vs. TEMPERATURE OV 60 VCC = +5V 40 VCC = +3V 11 OUT (2V/div) 20 10 OV VCC = +1.8V VCC = +5V 9 0 10 100 1000 RPULLUP (k) 10,000 10 100 1000 10,000 20s/div RPULLUP (k) _______________________________________________________________________________________ 7 MAX9117-MAX9120 Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0V, CL = 15pF, VOVERDRIVE = 100mV, TA = +25C, unless otherwise noted.) MAX9117-MAX9120 SC70, 1.6V, Nanopower, Beyond-the-Rails Comparators With/Without Reference Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0V, CL = 15pF, VOVERDRIVE = 100mV, TA = +25C, unless otherwise noted.) MAX9117/MAX9119 PROPAGATION DELAY (tPD+) (VCC = +5V) MAX9117/MAX9119 PROPAGATION DELAY (tPD+) (VCC = +3V) PROPAGATION DELAY (tPD-) (VCC = +3V) MAX9117-20 toc29 MAX9117-20 toc28 MAX9117-20 toc30 IN+ (50mV/div) IN+ (50mV/div) IN+ (50mV/div) OV OV OV OUT (2V/div) OUT (2V/div) OV OUT (2V/div) OV OV 20s/div 20s/div 20s/div PROPAGATION DELAY (tPD-) (VCC = +1.8V) MAX9117/MAX9119 PROPAGATION DELAY (tPD+) (VCC = +1.8V) MAX9117/MAX9119 10kHz RESPONSE (VCC = +1.8V) MAX9117-20 toc31 MAX9117-20 toc32 MAX9117-20 toc33 IN+ (50mV/div) IN+ (50mV/div) IN+ (50mV/div) OV OV OV OUT (1V/div) OV OUT (1V/div) OV OUT (1V/div) 20s/div OV 20s/div 20s/div MAX9117/MAX9119 1kHz RESPONSE (VCC = +5V) POWER-UP/DOWN RESPONSE MAX9117-20 toc34 MAX9117-20 toc35 IN+ (50mV/div) VCC (2V/div) OV OV OUT (2V/div) OUT (2V/div) OV OV 200s/div 8 40s/div _______________________________________________________________________________________ SC70, 1.6V, Nanopower, Beyond-the-Rails Comparators With/Without Reference VCC VCC IN+ IN+ OUT REF OUT IN- MAX9119 MAX9120 MAX9117 MAX9118 REF 1.252V VEE VEE Pin Description PIN MAX9117/ MAX9118 MAX9119/ MAX9120 NAME FUNCTION SC70 SO SC70 SO 1 6 1 6 OUT 2 4 2 4 VEE 3 3 3 3 IN+ Comparator Noninverting Input 4 2 -- REF 1.252V Reference 5 7 5 7 VCC Positive Supply -- -- 4 2 IN- -- 1, 5, 8 -- 1, 5, 8 N.C. Comparator Output Negative Supply Comparator Inverting Input No Connection. Not internally connected. Detailed Description The MAX9117/MAX9118 feature an on-board 1.252V 1.75% reference, yet draw an ultra-low supply current of 600nA. The MAX9119/MAX9120 (without reference) consume just 350nA of supply current. All four devices are guaranteed to operate down to +1.6V. Their common-mode input voltage range extends 200mV beyond-the-rails. Internal hysteresis ensures clean output switching, even with slow-moving input signals. Large internal output drivers allow rail-to-rail output swing with up to 5mA loads. The output stage employs a unique design that minimizes supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. The MAX9117/MAX9119 have a push-pull output stage that sinks as well as sources current. The MAX9118/MAX9120 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-OR output logic functions. Input Stage Circuitry The input common-mode voltage range extends from VEE - 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 protected from overvoltage by internal ESD protection diodes connected to the supply rails. As the input voltage exceeds the supply rails, these ESD protection diodes become forward biased and begin to conduct. Output Stage Circuitry The MAX9117-MAX9120 contain a unique breakbefore-make output stage capable of rail-to-rail operation with up to 5mA loads. Many comparators consume orders of magnitude more current during switching than during steady-state operation. However, with this family of comparators, the supply-current change during an output transition is extremely small. In the Typical Operating 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. _______________________________________________________________________________________ 9 MAX9117-MAX9120 Functional Diagrams MAX9117-MAX9120 SC70, 1.6V, Nanopower, Beyond-the-Rails Comparators With/Without Reference Reference (MAX9117/MAX9118) The internal reference in the MAX9117/MAX9118 has an output voltage of +1.252V with respect to VEE. Its typical temperature coefficient is 100ppm/C over the full -40C to +85C temperature range. The reference is a PNP emitter-follower driven by a 120nA current source (Figure 1). The output impedance of the voltage reference is typically 200k, 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 impedance, buffer the reference with a low-input-leakage op amp, such as the MAX4162. Applications Information Low-Voltage, Low-Power Operation The MAX9117-MAX9120 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 MAX9117-MAX9120, assuming nominal conditions. Internal Hysteresis Many comparators oscillate in the linear region of operation because of noise or undesired parasitic feedback. This tends to occur when the voltage on one input is equal or very close to the voltage on the other input. The MAX9117-MAX9120 have internal hysteresis to counter parasitic effects and noise. The hysteresis in a comparator creates two trip points: one for the rising input voltage (VTHR) 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 hysteresis effectively causes one comparator input to move quickly past the other, thus taking the input out of the VCC 120nA REF VBIAS VEE Figure 1. MAX9117/MAX9118 Voltage Reference Output Equivalent Circuit 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. Additional Hysteresis (MAX9117/MAX9119) The MAX9117/MAX9119 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 response 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 0.2A to minimize errors caused by leakage current. The current through R3 at the trip point is (VREF - VOUT) / R3. Considering the two possible output states in solving for R3 yields two formulas: R3 = VREF / IR3 or R3 = (VCC - VREF) / IR3. Use the smaller of the two resulting resistor values. For example, when using the Table 1. Battery Applications Using MAX9117-MAX9120 BATTERY TYPE RECHARGEABLE VFRESH (V) VEND-OF-LIFE (V) CAPACITY, AA SIZE (mA-h) MAX9117/MAX9118 OPERATING TIME (hr) MAX9119/MAX9120 OPERATING TIME (hr) Alkaline (2 Cells) No 3.0 1.8 2000 2.5 x 106 5 x 106 Nickel-Cadmium (2 Cells) Yes 2.4 1.8 750 937,500 1.875 x 106 Lithium-Ion (1 Cell) Yes 3.5 2.7 1000 1.25 x 106 2.5 x 106 Nickel-MetalHydride (2 Cells) Yes 2.4 1.8 1000 1.25 x 106 2.5 x 106 10 ______________________________________________________________________________________ SC70, 1.6V, Nanopower, Beyond-the-Rails Comparators With/Without Reference R3 VTHR R1 HYSTERESIS INVHB VIN VCC BAND R2 VTHF OUT VEE VREF MAX9117 MAX9119 OUT Figure 2. Threshold Hysteresis Band MAX9117 (VREF = 1.252V) and VCC = +5V, and if we choose IR3 = 1A, then the two resistor values are 1.2M and 3.8M. Choose a 1.2M standard value for R3. 2) Choose the hysteresis band required (VHB). For this example, choose 50mV. 3) Calculate R1 according to the following equation: R1 = R3 (VHB / VCC) For this example, insert the values: R1 = 1.2M (50mV / 5V) = 12k 4) Choose the trip point for VIN rising (VTHR) such that VTHR > VREF (R1 + R3) / R3, (VTHR is the trip point for VIN rising). 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)] R2 = 1 / [3.0V / (1.252V 12k) - (1 / 12k) (1 / 1.2M)] = 8.655k For this example, choose an 8.66k standard 1% value. 6) Verify the trip voltages and hysteresis as follows: VIN rising: VTHR = VREF R1 [(1 / R1) + (1 / R2) + (1 / R3)] = 3V VIN falling: VTHF = VTHR - (R1 VCC / R3) = 2.95V Hysteresis = VTHR - VTHF = 50mV Figure 3. MAX9117/MAX9119 Additional Hysteresis Additional Hysteresis (MAX9118/MAX9120) The MAX9118/MAX9120 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 formulas differ slightly from those of the MAX9117/ MAX9119. Use the following procedure to calculate resistor values. 1) Select R3 according to the formulas R3 = VREF / 1A or R3 = (VCC - VREF) / 1A - R4. Use the smaller of the two resulting resistor values. 2) Choose the hysteresis band required (VHB). 3) Calculate R1 according to the following equation: R1 = (R3 + R4) (VHB / VCC) 4) Choose the trip point for VIN rising (VTHR) (VTHR is the trip point for VIN rising). 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: VTHR 1 1 R2 = 1 / - - VREF x R1 R1 R 3 6) Verify the trip voltages and hysteresis as follows: 1 1 1 VIN ri sin g : VTHR = VREF x R1 + + R1 R2 R3 VIN falling : R1 1 1 1 VTHF = VREF x R1 + + x VCC - R1 R2 R 3 + R4 R 3 + R4 Hysteresis = VTHR - VTHF ______________________________________________________________________________________ 11 MAX9117-MAX9120 VCC THRESHOLDS IN+ MAX9117-MAX9120 SC70, 1.6V, Nanopower, Beyond-the-Rails Comparators With/Without Reference Typical Application Circuit 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 surface-mount components are recommended. If the REF pin is decoupled, use a new low-leakage capacitor. +5V (+3V) +3V (+5V) 2M Zero-Crossing Detector Figure 5 shows a zero-crossing detector application. The MAX9119's inverting input is connected to ground, and its noninverting input is connected to a 100mVP-P signal source. As the signal at the noninverting input crosses 0V, the comparator's output changes state. VCC 3V (5V) LOGIC OUT OUT 2M IN+ MAX9120 Logic-Level Translator The Typical Application Circuit shows an application that converts 5V logic to 3V logic levels. The MAX9120 is powered by the +5V supply voltage, and the pullup resistor for the MAX9120's open-drain output is connected 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. RPULLUP IN- VEE 5V (3V) LOGIC IN LOGIC-LEVEL TRANSLATOR VCC VCC R3 VCC 100mVP-P R1 R4 VIN VCC R2 OUT OUT IN- VEE VREF IN+ MAX9118 MAX9120 MAX9119 VEE Figure 4. MAX9118/MAX9120 Additional Hysteresis Figure 5. Zero-Crossing Detector Chip Information TRANSISTOR COUNT: 98 12 ______________________________________________________________________________________ SC70, 1.6V, Nanopower, Beyond-the-Rails Comparators With/Without Reference SC70, 5L.EPS PACKAGE OUTLINE, 5L SC70 21-0076 E 1 1 ______________________________________________________________________________________ 13 MAX9117-MAX9120 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) DIM A A1 B C e E H L N E H INCHES MILLIMETERS MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050 MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .EPS MAX9117-MAX9120 SC70, 1.6V, Nanopower, Beyond-the-Rails Comparators With/Without Reference 1.27 VARIATIONS: 1 INCHES TOP VIEW DIM D D D MIN 0.189 0.337 0.386 MAX 0.197 0.344 0.394 MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC D A B e C 0-8 A1 L FRONT VIEW SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, .150" SOIC APPROVAL DOCUMENT CONTROL NO. 21-0041 REV. B 1 1 Revision History Pages changed at Rev 4: 1, 2, 9, 13 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. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX9117EXK+T MAX9118EXK+T MAX9119EXK+T MAX9120EXK+T MAX9120ESA MAX9120ESA-T MAX9117EXK-T MAX9118EXK-T MAX9119EXK-T MAX9120EXK-T MAX9117ESA+ MAX9117ESA+T