LT6700IS6-3-TRMPBF

FEATURES n n n n n n n n n n n n LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 Micropower, Low Voltage, Dual Comparator with 400mV Reference DESCRIPTION The LT ® 6700-1/LT6700-2/LT6700-3/LT6700HV-1/ LT6700HV-2/LT6700HV-3 combine two micropower, low voltage comparators with a 400mV reference in a 6-lead SOT-23 or tiny DFN package. Operating with supplies from 1.4V up to 18V, these devices draw only 6.5μA, making them ideal for low voltage system monitoring. Hysteresis is included in the comparators, easing design requirements to insure stable output operation. The comparators each have one input available externally; the other inputs are connected internally to the reference. The comparator outputs are open collector and the output load can be referred to any voltage up to 18V (36V for LT6700HV), independent of supply voltage. The output stage sinking capability is guaranteed to be greater than 5mA over temperature. The three versions of this part differ by the polarity of the available comparator inputs. The LT6700-1/ LT6700HV-1 has one inverting input and one noninverting input, making it suitable for use as a window comparator. The LT6700-2/LT6700HV-2 has two inverting inputs and the LT6700-3/LT6700HV-3 has two noninverting inputs. All versions are offered in commercial, industrial and automotive temperature ranges. Internal 400mV Reference Total Threshold Error: ±1.25% Max at 25°C Inputs and Outputs Operate to 36V Wide Supply Range: 1.4V to 18V Specified for –55°C to 125°C Temperature Range Low Quiescent Current: 6.5μA Typ at 5V Internal Hysteresis: 6.5mV Typ Low Input Bias Current: ±10nA Max Over-The-Top® Input also Includes Ground Open-Collector Outputs Allow Level Translation C hoice of Input Polarities: LT6700-1/LT6700-2/ LT6700-3/LT6700HV-1/LT6700HV-2/LT6700HV-3 Available in Low Profile (1mm) SOT-23 (ThinSOT™) and 2mm × 3mm DFN Packages APPLICATIONS n n n n n n n Battery-Powered System Monitoring Threshold Detectors Window Comparators Relay Driving Industrial Control Systems Handheld Instruments Automotive Monitor and Controls L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Over-The-Top is a registered trademark of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Micropower Battery Monitor 1M LT6700-3 1M COMP B THRESHOLD VOLTAGE (mV) VBATT > 1.6V 63.4k 1M VBATT 1.4V (MIN) 3V (NOM) Comparator Thresholds vs Temperature 406 404 402 400 398 396 394 TWO TYPICAL PARTS 392 COMP A AND B VS = 5V 390 –60 –40 –20 0 20 40 60 80 100 120 TEMPERATURE (°C) 6700123 TA02 #1A #1B #2A #2B RISING INPUT + 0.1μF ALKALINE AA CELLS + + – VR = 400mV REFERENCE COMP A VBATT > 2V VS FALLING INPUT – + 261k MONITOR CONSUMES ~10μA HYSTERESIS IS APPROXIMATELY 2% OF TRIP VOLTAGE 6700123 TA01 6700123ff 1 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (VS to GND) ..........................18.5V Input Voltage (+IN, –IN) LT6700 (Note 3) .......................... 18.5V to (GND – 0.3V) LT6700HV (Note 3) ........................ 40V to (GND – 0.3V) LT6700 Output Voltage (OUT) ..... 18.5V to (GND – 0.3V) LT6700HV Output Voltage (OUT) ... 40V to (GND – 0.3V) Output Short-Circuit Duration (Note 2) ............ Indefinite Input Current (Note 3)..........................................–10mA Operating Temperature Range (Note 4) LT6700CS6/LT6700HVCS6/ LT6700CDCB-1/-2/-3 ...........................– 40°C to 85°C LT6700IS6/LT6700HVIS6/ LT6700IDCB-1/-2/-3 ............................ –40°C to 85°C LT6700HS6/LT6700HVHS6/ LT6700HDCB-1/-2/-3 ........................ –40°C to 125°C Specified Temperature Range (Note 5) LT6700CS6/LT6700HVCS6/ LT6700CDCB-1/-2/-3 .............................. 0°C to 70°C LT6700IS6/LT6700HVIS6/ LT6700IDCB-1/-2/-3 ............................ –40°C to 85°C LT6700HS6/LT6700HVHS6/ LT6700HDCB-1/-2/-3 ....................... –40°C to 125°C LT6700MPDCB-1/-2/-3 .................... –55°C to 125°C Maximum Junction Temperature S6 Package ....................................................... 150°C DCB6 Package .................................................. 150°C Storage Temperature Range S6 Package ........................................ –65°C to 150°C DCB6 Package ................................... –65°C to 150°C Lead Temperature, TSOT-23 (Soldering, 10 sec)... 300°C PIN CONFIGURATION LT6700-1 LT6700HV-1 TOP VIEW OUTA 1 GND 2 +INA 3 6 OUTB 5 VS 4 –INB OUTA 1 GND 2 –INA 3 LT6700-2 LT6700HV-2 TOP VIEW 6 OUTB 5 VS 4 –INB LT6700-3 LT6700HV-3 TOP VIEW OUTA 1 GND 2 +INA 3 6 OUTB 5 VS 4 +INB S6 PACKAGE 6-LEAD PLASTIC TSOT-23 TJMAX = 150°C, θJA = 230°C/W S6 PACKAGE 6-LEAD PLASTIC TSOT-23 TJMAX = 150°C, θJA = 230°C/W S6 PACKAGE 6-LEAD PLASTIC TSOT-23 TJMAX = 150°C, θJA = 230°C/W LT6700-1 TOP VIEW OUTA 1 OUTB 2 VS 3 7 6 + INA 5 GND 4 –INB LT6700-2 TOP VIEW OUTA 1 OUTB 2 VS 3 7 6 – INA 5 GND 4 –INB LT6700-3 TOP VIEW OUTA 1 OUTB 2 VS 3 7 6 + INA 5 GND 4 +INB DCB6 PACKAGE 6-LEAD (2mm × 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 64°C/W SOLDERED EXPOSED PAD (PIN 7) INTERNALLY CONNECTED TO GND (PCB CONNECTION OPTIONAL) DCB6 PACKAGE 6-LEAD (2mm × 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 64°C/W SOLDERED EXPOSED PAD (PIN 7) INTERNALLY CONNECTED TO GND (PCB CONNECTION OPTIONAL) DCB6 PACKAGE 6-LEAD (2mm × 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 64°C/W SOLDERED EXPOSED PAD (PIN 7) INTERNALLY CONNECTED TO GND (PCB CONNECTION OPTIONAL) 6700123ff 2 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 ORDER INFORMATION Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE 0°C to 70°C 0°C to70°C –40°C to 85°C –40°C to 85°C –40°C to 125°C –40°C to 125°C 0°C to 70°C 0°C to 70°C –40°C to 85°C –40°C to 85°C –40°C to 125°C –40°C to 125°C 0°C to 70°C 0°C to 70°C –40°C to 85°C –40°C to 85°C –40°C to 125°C –40°C to 125°C 0°C to 70°C –40°C to 85°C –40°C to 125°C –55°C to 125°C 0°C to 70°C –40°C to 85°C –40°C to 125°C –55°C to 125°C 0°C to 70°C –40°C to 85°C –40°C to 125°C –55°C to 125°C LT6700CS6-1#TRMPBF LT6700CS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 LT6700HVCS6-1#TRMPBF LT6700HVCS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 LT6700IS6-1#TRMPBF LT6700IS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 LT6700HVIS6-1#TRMPBF LT6700HVIS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 LT6700HS6-1#TRMPBF LT6700HS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 LT6700HVHS6-1#TRMPBF LT6700HVHS6-1#TRPBF LTK7 6-Lead Plastic TSOT-23 LT6700CS6-2#TRMPBF LT6700CS6-2#TRPBF LTADL 6-Lead Plastic TSOT-23 LT6700HVCS6-2#TRMPBF LT6700HVCS6-2#TRPBF LTADL 6-Lead Plastic TSOT-23 LT6700IS6-2#TRMPBF LT6700IS6-2#TRPBF LTADL 6-Lead Plastic TSOT-23 LT6700HVIS6-2#TRMPBF LT6700HVIS6-2#TRPBF LTADL 6-Lead Plastic TSOT-23 LT6700HS6-2#TRMPBF LT6700HS6-2#TRPBF LTADL 6-Lead Plastic TSOT-23 LT6700HVHS6-2#TRMPBF LT6700HVHS6-2#TRPBF LTADL 6-Lead Plastic TSOT-23 LT6700CS6-3#TRMPBF LT6700CS6-3#TRPBF LTADM 6-Lead Plastic TSOT-23 LT6700HVCS6-3#TRMPBF LT6700HVCS6-3#TRPBF LTADM 6-Lead Plastic TSOT-23 LT6700IS6-3#TRMPBF LT6700IS6-3#TRPBF LTADM 6-Lead Plastic TSOT-23 LT6700HVIS6-3#TRMPBF LT6700HVIS6-3#TRPBF LTADM 6-Lead Plastic TSOT-23 LT6700HS6-3#TRMPBF LT6700HS6-3#TRPBF LTADM 6-Lead Plastic TSOT-23 LT6700HVHS6-3#TRMPBF LT6700HVHS6-3#TRPBF LTADM 6-Lead Plastic TSOT-23 LT6700CDCB-1#TRMPBF LT6700CDCB-1#TRPBF LBXW 6-Lead (2mm × 3mm) Plastic DFN LT6700IDCB-1#TRMPBF LT6700IDCB-1#TRPBF LBXW 6-Lead (2mm × 3mm) Plastic DFN LT6700HDCB-1#TRMPBF LT6700HDCB-1#TRPBF LBXW 6-Lead (2mm × 3mm) Plastic DFN LT6700MPDCB-1#TRMPBF LT6700MPDCB-1#TR LDVS 6-Lead (2mm × 3mm) Plastic DFN LT6700CDCB-2#TRMPBF LT6700CDCB-2#TRPBF LBXX 6-Lead (2mm × 3mm) Plastic DFN LT6700IDCB-2#TRMPBF LT6700IDCB-2#TRPBF LBXX 6-Lead (2mm × 3mm) Plastic DFN LT6700HDCB-2#TRMPBF LT6700HDCB-2#TRPBF LBXX 6-Lead (2mm × 3mm) Plastic DFN LT6700MPDCB-2#TRMPBF LT6700MPDCB-2#TR LDVT 6-Lead (2mm × 3mm) Plastic DFN LT6700CDCB-3#TRMPBF LT6700CDCB-3#TRPBF LBXY 6-Lead (2mm × 3mm) Plastic DFN LT6700IDCB-3#TRMPBF LT6700IDCB-3#TRPBF LBXY 6-Lead (2mm × 3mm) Plastic DFN LT6700HDCB-3#TRMPBF LT6700HDCB-3#TRPBF LBXY 6-Lead (2mm × 3mm) Plastic DFN LT6700MPDCB-3#TRMPBF LT6700MPDCB-3#TR LDVV 6-Lead (2mm × 3mm) Plastic DFN TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ 6700123ff 3 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 ELECTRICAL CHARACTERISTICS SYMBOL VTH(R) PARAMETER Rising Input Threshold Voltage (Note 6) TA = 25°C, (LT6700-1/LT6700-2/LT6700-3) unless otherwise specified. MIN 394 395 393 392 386 387 385 384 3.5 TYP 400 400 400 400 393.5 393.5 393.5 393.5 6.5 ±0.01 ±0.01 ±4 55 60 70 0.01 0.01 18 29 2.2 0.22 MAX 406 405 407 408 401 400 402 403 9.5 ±10 ±10 ±10 200 200 200 0.8 0.8 UNITS mV mV mV mV mV mV mV mV mV nA nA nA mV mV mV μA μA μs μs μs μs CONDITIONS RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing VS = 1.4V, 18V, VIN = VS VS = 1.4V, VIN = 18V VS = 1.4V, 18V, VIN = 0.1V 10mV Input Overdrive VS = 1.4V, IOUT = 0.5mA VS = 1.6V, IOUT = 3mA VS = 5V, IOUT = 5mA VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive VS = 1.4V, VOUT = 18V, VIN = 40mV Overdrive VS = 5V, 10mV Input Overdrive, RL = 10k, VOL = 400mV VS = 5V, 10mV Input Overdrive, RL = 10k, VOH = 0.9 • VS VS = 5V, 10mV Input Overdrive, RL = 10k VO = (0.1 to 0.9) • VS VS = 5V, 10mV Input Overdrive, RL = 10k VO = (0.1 to 0.9) • VS No Load Current VS = 1.4V VS = 5V VS = 12V VS = 18V VTH(F) Falling Input Threshold Voltage (Note 6) HYS IB HYS = VTH(R) – VTH(F) Input Bias Current VOL Output Low Voltage IOFF tPD(HL) tPD(LH) tr tf IS Output Leakage Current High-to-Low Propagation Delay Low-to-High Propagation Delay Output Rise Time Output Fall Time Supply Current 5.7 6.5 6.9 7.1 10.0 11.0 12.5 13.0 μA μA μA μA The l denotes the specifications which apply over the temperature range of 0°C ≤ TA ≤ 70°C, (LT6700C-1/LT6700C-2/LT6700C-3) unless otherwise specified (Notes 4, 5). SYMBOL VTH(R) PARAMETER Rising Input Threshold Voltage (Note 6) CONDITIONS RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V ● ● ● ● ● ● ● ● MIN 391.0 392.5 390.0 389.0 383.5 384.5 382.5 381.5 TYP MAX 409.0 407.5 410.0 411.0 403.5 402.5 404.5 405.5 UNITS mV mV mV mV mV mV mV mV VTH(F) Falling Input Threshold Voltage (Note 6) 6700123ff 4 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the temperature range of 0°C ≤ TA ≤ 70°C, (LT6700C-1/LT6700C-2/LT6700C-3) unless otherwise specified (Notes 4, 5). SYMBOL HYS IB PARAMETER HYS = VTH(R) – VTH(F) Input Bias Current CONDITIONS VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing VS = 1.4V, 18V, VIN = VS VS = 1.4V, VIN = 18V VS = 1.4V, 18V, VIN = 0.1V 10mV Input Overdrive VS = 1.4V, IOUT = 0.5mA VS = 1.6V, IOUT = 3mA VS = 5V, IOUT = 5mA VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive VS = 1.4V, VOUT = 18V, VIN = 40mV Overdrive No Load Current VS = 1.4V VS = 5V VS = 12V VS = 18V ● ● ● ● ● ● ● ● ● ● ● ● ● MIN 3 TYP MAX 11 ±15 ±15 ±15 250 250 250 1 1 13.0 14.0 15.5 16.0 UNITS mV nA nA nA mV mV mV μA μA μA μA μA μA VOL Output Low Voltage IOFF IS Output Leakage Current Supply Current The l denotes the specifications which apply over the temperature range of –40°C ≤ TA ≤ 85°C, (LT6700I-1/LT6700I-2/LT6700I-3) unless otherwise specified (Notes 4, 5). SYMBOL VTH(R) PARAMETER Rising Input Threshold Voltage (Note 6) CONDITIONS RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing VS = 1.4V, 18V, VIN = VS VS = 1.4V, VIN = 18V VS = 1.4V, 18V, VIN = 0.1V 10mV Input Overdrive VS = 1.4V, IOUT = 0.1mA VS = 1.6V, IOUT = 3mA VS = 5V, IOUT = 5mA VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive VS = 1.4V, VOUT = 18V, VIN = 40mV Overdrive No Load Current VS = 1.4V VS = 5V VS = 12V VS = 18V ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● MIN 390 392 389 388 382.5 383.5 381.5 380.5 2 TYP MAX 410 408 411 412 404.5 403.5 405.5 406.5 11.5 ±15 ±15 ±15 250 250 250 1 1 14.0 15.0 16.5 17.0 UNITS mV mV mV mV mV mV mV mV mV nA nA nA mV mV mV μA μA μA μA μA μA VTH(F) Falling Input Threshold Voltage (Note 6) HYS IB HYS = VTH(R) – VTH(F) Input Bias Current VOL Output Low Voltage IOFF IS Output Leakage Current Supply Current 6700123ff 5 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the temperature range of –40°C ≤ TA ≤ 125°C, (LT6700H-1/LT6700H-2/LT6700H-3) unless otherwise specified (Notes 4, 5). SYMBOL VTH(R) PARAMETER Rising Input Threshold Voltage (Note 6) CONDITIONS RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing VS = 1.4V, 18V, VIN = VS VS = 1.4V, VIN = 18V VS = 1.4V, 18V, VIN = 100mV 10mV Input Overdrive VS = 1.4V, IOUT = 0.1mA VS = 1.6V, IOUT = 3mA VS = 5V, IOUT = 5mA VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive VS = 1.4V, VOUT = 18V, VIN = 40mV Overdrive No Load Current VS = 1.4V VS = 5V VS = 12V VS = 18V ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● MIN 390 392 389 388 381.5 382.5 380.5 379.5 2 LT6700H TYP MAX 411 410 412 413 405.5 404.5 406.5 407.5 13.5 ±45 ±45 ±50 250 250 250 1 1 16.0 17.0 18.5 19.0 UNITS mV mV mV mV mV mV mV mV mV nA nA nA mV mV mV μA μA μA μA μA μA VTH(F) Falling Input Threshold Voltage (Note 6) HYS IB HYS = VTH(R) – VTH(F) Input Bias Current VOL Output Low Voltage IOFF IS Output Leakage Current Supply Current The l denotes the specifications which apply over the temperature range of –55°C ≤ TA ≤ 125°C, (LT6700MP-1/LT6700MP-2/LT6700MP-3) unless otherwise specified (Notes 4, 5). SYMBOL VTH(R) PARAMETER Rising Input Threshold Voltage (Note 6) CONDITIONS RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing VS = 1.4V, 18V, VIN = VS VS = 1.4V, VIN = 18V VS = 1.4V, 18V, VIN = 100mV 10mV Input Overdrive VS = 1.4V, IOUT = 0.1mA VS = 1.6V, IOUT = 3mA VS = 5V, IOUT = 5mA ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● MIN 390 392 389 388 381.5 382.5 380.5 379.5 2 LT6700H TYP MAX 411 410 412 413 405.5 404.5 406.5 407.5 13.5 ±45 ±45 ±50 250 250 250 UNITS mV mV mV mV mV mV mV mV mV nA nA nA mV mV mV VTH(F) Falling Input Threshold Voltage (Note 6) HYS IB HYS = VTH(R) – VTH(F) Input Bias Current VOL Output Low Voltage 6700123ff 6 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the temperature range of –55°C ≤ TA ≤ 125°C, (LT6700MP-1/LT6700MP-2/LT6700MP-3) unless otherwise specified (Notes 4, 5). SYMBOL IOFF IS PARAMETER Output Leakage Current Supply Current CONDITIONS VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive VS = 18V, VOUT = 18V, VIN = 40mV Overdrive No Load Current VS = 1.4V VS = 5V VS = 12V VS = 18V ● ● ● ● ● ● MIN LT6700H TYP MAX 1 1 16.0 17.0 18.5 19.0 UNITS μA μA μA μA μA μA TA = 25°C, (LT6700HV-1/LT6700HV-2/LT6700HV-3) unless otherwise specified. SYMBOL PARAMETER VTH(R) Rising Input Threshold Voltage (Note 6) CONDITIONS RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing VS = 1.4V, 18V, VIN = VS VS = 1.4V, VIN = 18V, 36V VS = 1.4V, 18V, VIN = 0.1V 10mV Input Overdrive VS = 1.4V, IOUT = 0.5mA VS = 1.6V, IOUT = 3mA VS = 5V, IOUT = 5mA VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive VS = 18V, VOUT = 18V, (36V, RL = 100k), VIN = 40mV Overdrive VS = 5V, 10mV Input Overdrive, RL = 10k, VOL = 400mV VS = 5V, 10mV Input Overdrive, RL = 10k, VOH = 0.9 • VS VS = 5V, 10mV Input Overdrive, RL = 10k VO = (0.1 to 0.9) • VS VS = 5V, 10mV Input Overdrive, RL = 10k VO = (0.1 to 0.9) • VS No Load Current VS = 1.4V VS = 5V VS = 12V VS = 18V MIN 394 395 393 392 386 387 385 384 3.5 TYP 400 400 400 400 393.5 393.5 393.5 393.5 6.5 ±0.01 ±0.01 ±4 55 60 70 0.01 0.01 18 29 2.2 0.22 MAX 406 405 407 408 401 400 402 403 9.5 ±10 ±10 ±10 200 200 200 0.8 0.8 UNITS mV mV mV mV mV mV mV mV mV nA nA nA mV mV mV μA μA μs μs μs μs VTH(F) Falling Input Threshold Voltage (Note 6) HYS IB HYS = VTH(R) – VTH(F) Input Bias Current VOL Output Low Voltage IOFF tPD(HL) tPD(LH) tr tf IS Output Leakage Current High-to-Low Propagation Delay Low-to-High Propagation Delay Output Rise Time Output Fall Time Supply Current 5.7 6.5 6.9 7.1 10.0 11.0 12.5 13.0 μA μA μA μA 6700123ff 7 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the temperature range of 0°C ≤ TA ≤ 70°C, (LT6700HVC-1/LT6700HVC-2/LT6700HVC-3) unless otherwise specified (Notes 4, 5). SYMBOL PARAMETER VTH(R) Rising Input Threshold Voltage (Note 6) CONDITIONS RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing VS = 1.4V, 18V, VIN = VS VS = 1.4V, VIN = 18V, 36V VS = 1.4V, 18V, VIN = 0.1V 10mV Input Overdrive VS = 1.4V, IOUT = 0.5mA VS = 1.6V, IOUT = 3mA VS = 5V, IOUT = 5mA VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive VS = 18V, VOUT = 18V, (36V, RL = 100k), VIN = 40mV Overdrive No Load Current VS = 1.4V VS = 5V VS = 12V VS = 18V ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● MIN 391.0 392.5 390.0 389.0 383.5 384.5 382.5 381.5 3 TYP MAX 409.0 407.5 410.0 411.0 403.5 402.5 404.5 405.5 11 ±15 ±15 ±15 250 250 250 1 1 13.0 14.0 15.5 16.0 UNITS mV mV mV mV mV mV mV mV mV nA nA nA mV mV mV μA μA μA μA μA μA VTH(F) Falling Input Threshold Voltage (Note 6) HYS IB HYS = VTH(R) – VTH(F) Input Bias Current VOL Output Low Voltage IOFF IS Output Leakage Current Supply Current The l denotes the specifications which apply over the temperature range of –40°C ≤ TA ≤ 85°C, (LT6700HVI-1/LT6700HVI-2/LT6700HVI-3) unless otherwise specified (Notes 4, 5). SYMBOL PARAMETER VTH(R) Rising Input Threshold Voltage (Note 6) CONDITIONS RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing VS = 1.4V, 18V, VIN = VS VS = 1.4V, VIN = 18V, 36V VS = 1.4V, 18V, VIN = 0.1V 10mV Input Overdrive VS = 1.4V, IOUT = 0.1mA VS = 1.6V, IOUT = 3mA VS = 5V, IOUT = 5mA VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive VS = 18V, VOUT = 18V, (36V, RL = 100k), VIN = 40mV Overdrive ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● MIN 390 392 389 388 382.5 383.5 381.5 380.5 2 TYP MAX 410 408 411 412 404.5 403.5 405.5 406.5 11.5 ±15 ±15 ±15 250 250 250 1 1 UNITS mV mV mV mV mV mV mV mV mV nA nA nA mV mV mV μA μA VTH(F) Falling Input Threshold Voltage (Note 6) HYS IB HYS = VTH(R) – VTH(F) Input Bias Current VOL Output Low Voltage IOFF Output Leakage Current 6700123ff 8 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the temperature range of –40°C ≤ TA ≤ 85°C, (LT6700HVI-1/LT6700HVI-2/LT6700HVI-3) unless otherwise specified (Notes 4, 5). SYMBOL PARAMETER IS Supply Current CONDITIONS No Load Current VS = 1.4V VS = 5V VS = 12V VS = 18V ● ● ● ● MIN TYP MAX 14.0 15.0 16.5 17.0 UNITS μA μA μA μA The l denotes the specifications which apply over the temperature range of –40°C ≤ TA ≤ 125°C, (LT6700HVH-1/LT6700HVH-2/ LT6700HVH-3) unless otherwise specified (Notes 4, 5). SYMBOL PARAMETER VTH(R) Rising Input Threshold Voltage (Note 6) CONDITIONS RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V RL = 100k, VO = 2V Swing VS = 1.4V VS = 5V VS = 12V VS = 18V VS = 1.4V, 5V, 12V, 18V, RL = 100k, VO = 2V Swing VS = 1.4V, 18V, VIN = VS VS = 1.4V, VIN = 18V, 36V VS = 1.4V, 18V, VIN = 100mV 10mV Input Overdrive VS = 1.4V, IOUT = 0.1mA VS = 1.6V, IOUT = 3mA VS = 5V, IOUT = 5mA VS = 1.4V, 18V, VOUT = VS, VIN = 40mV Overdrive VS = 18V, VOUT = 18V, (36V, RL = 100k), VIN = 40mV Overdrive No Load Current VS = 1.4V VS = 5V VS = 12V VS = 18V ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● MIN 390 392 389 388 381.5 382.5 380.5 379.5 2 LT6700H TYP MAX UNITS 411 410 412 413 405.5 404.5 406.5 407.5 13.5 ±45 ±45 ±50 250 250 250 1 1 16.0 17.0 18.5 19.0 mV mV mV mV mV mV mV mV mV nA nA nA mV mV mV μA μA μA μA μA μA VTH(F) Falling Input Threshold Voltage (Note 6) HYS IB HYS = VTH(R) – VTH(F) Input Bias Current VOL Output Low Voltage IOFF IS Output Leakage Current Supply Current Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: A heat sink may be required to keep the junction temperature below the absolute maximum rating when the output is shorted indefinitely. Note 3: The inputs are protected by ESD diodes to the ground. If the input voltage exceeds –0.3V below ground, the input current should be limited to less than 10mA. Note 4: The LT6700C-1/-2/-3/LT6700HVC-1/-2/-3, and LT6700I-1/-2/-3/LT6700HVI-1/-2/-3 are guaranteed functional over the operating temperature range of – 40°C to 85°C. The LT6700H-1/-2/-3/ LT6700HVH-1/-2/-3 is guaranteed functional over the operating temperature range of –40°C to 125°C. The LT6700MP-1/-2/-3 is guaranteed functional over the operating temperature range of –55°C to 125°C. Note 5: The LT6700C-1/-2/-3/LT6700HVC-1/-2/-3 is guaranteed to meet the specified performance from 0°C to 70°C. The LT6700C-1/-2/3/LT6700HVC-1/-2/-3 are designed, characterized and expected to meet specified performance from – 40°C to 85°C but are not tested or QA sampled at these temperatures. The LT6700I-1/-2/-3/LT6700HVI-1/-2/-3 is guaranteed to meet specified performance from –40°C to 85°C. The LT6700H-1/-2/-3/LT6700HVH-1/-2/-3 is guaranteed to meet specified performance from –40°C to 125°C.The LT6700MP-1/-2/-3 is guaranteed to meet specified performance from –55°C to 125°C. Note 6: VTH defines the threshold voltage of the comparators and combines the effect of offset and reference accuracy. 6700123ff 9 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 PIN FUNCTIONS VS LT6700-1 LT6700HV-1 –INB LT6700-2 LT6700HV-2 COMP B –INB OUTB VS LT6700-3 LT6700HV-3 COMP B OUTB +INB VS – + – + + – COMP B OUTB 400mV REFERENCE COMP A VS 400mV REFERENCE COMP A VS 400mV REFERENCE COMP A VS – +INA + OUTA –INA 6700123 PF01 – OUTA +INA OUTA + – 6700123 PF02 + 6700123 PF03 GND GND GND OUTA: Open-Collector Output of Comparator Section A. This pin provides drive for up to 40mA of load current. Offstate voltage may be as high as 18V (36V for LT6700HV) above GND, regardless of VS used. GND: Ground. This pin is also the low side return of the internal 400mV reference. INA: External Input for Comparator Section A. The voltage on this pin can range from –0.3V to 18V (36V for LT6700HV) with respect to GND regardless of VS used. The input is noninverting for the LT6700-1/LT6700HV-1 and LT6700-3/LT6700HV-3, and inverting for the LT6700-2/ LT6700HV-2. The other section A comparator input is internally connected to the 400mV reference. INB: External Input for Comparator Section B. The voltage on this pin can range from –0.3V to 18V (36V for LT6700HV) with respect to GND regardless of VS used. The input is noninverting for the LT6700-3/LT6700HV-3, and inverting for the LT6700-1/LT6700HV-1 and LT6700-2/ LT6700HV-2. The other section B comparator input is internally connected to the 400mV reference. VS: Comparator Core Supply Voltage. The parts are characterized for operation with 1.4V ≤ VS ≤ 18V with respect to GND. OUTB : Open-Collector Output of Comparator Section B. This pin provides drive for up to 40mA of load current. Offstate voltage may be as high as 18V (36V for LT6700HV) above GND, regardless of VS used. 6700123ff 10 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 TYPICAL PERFORMANCE CHARACTERISTICS Distribution of Rising Input Threshold Voltage 18 16 PERCENT OF UNITS (%) 14 12 10 8 6 4 2 0 394 396 398 400 402 404 406 RISING INPUT THRESHOLD VOLTAGE (mV) 6700123 G01 Distribution of Falling Input Threshold Voltage 18 16 PERCENT OF UNITS (%) 14 12 10 8 6 4 2 0 388 390 392 394 396 398 400 FALLING INPUT THRESHOLD VOLTAGE (mV) 6700123 G02 Distribution of Hysteresis 20 18 16 PERCENT OF UNITS (%) 14 12 10 8 6 4 2 0 4 4.8 5.6 6.4 7.2 HYSTERESIS (mV) 8 8.8 VS = 5V TA = 25°C VS = 5V TA = 25°C VS = 5V TA = 25°C 6700123 G03 Rising Input Threshold Voltage vs Temperature RISING INPUT THRESHOLD VOLTAGE (mV) RISING INPUT THRESHOLD VOLTAGE (mV) 404 403 402 401 400 399 398 397 #4 #2 #1 FOUR TYPICAL PARTS VS = 5V 403.0 402.5 402.0 401.5 401.0 400.5 400.0 399.5 Rising Input Threshold Voltage vs Temperature RISING INPUT THRESHOLD VOLTAGE (mV) VS = 1.4V VS = 5V VS = 12V VS = 18V 403.0 402.5 402.0 401.5 401.0 400.5 400.0 399.5 399.0 Rising Input Threshold Voltage vs Supply Voltage TA = 25°C TA = 85°C TA = 125°C TA = –55°C #3 396 –60 –40 –20 0 20 40 60 80 100 120 TEMPERATURE (°C) 6700123 G04 399.0 –60 –40 –20 0 20 40 60 80 100 120 TEMPERATURE (°C) 6700123 G05 2 4 8 10 12 14 6 SUPPLY VOLTAGE (V) 16 18 6700123 G06 Hysteresis vs Temperature 10 FOUR TYPICAL PARTS 9 VS = 5V #1 #2 8 #3 #4 7 6 5 4 3 2 –60 –40 –20 0 20 40 60 80 100 120 TEMPERATURE (°C) 6700123 G07 Hysteresis vs Temperature 10 9 8 HYSTERESIS (mV) 7 6 5 4 3 2 –60 –40 –20 0 20 40 60 80 100 120 TEMPERATURE (°C) 6700123 G08 Hysteresis vs Supply Voltage 10 9 8 HYSTERESIS (mV) 7 6 5 4 3 2 2 4 8 10 12 14 6 SUPPLY VOLTAGE (V) 16 18 TA = 25°C TA = 85°C TA = 125°C TA = –55°C VS = 1.4V VS = 5V VS = 12V VS = 18V HYSTERESIS (mV) 6700123 G09 6700123ff 11 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 TYPICAL PERFORMANCE CHARACTERISTICS Minimum Supply Voltage 1 0 THRESHOLD SHIFT (mV) –1 –2 –3 –4 –5 0.9 1.1 TA = 25°C TA = 85°C TA = 125°C TA = –55°C 1.3 1.7 1.5 SUPPLY VOLTAGE (V) 1.9 6700123 G10 Quiescent Supply Current vs Supply Voltage 10 TA = 25°C TA = 85°C TA = 125°C TA = –55°C SUPPLY CURRENT (μA) 50 Start-Up Supply Current TA = 25°C TA = 85°C TA = 125°C TA = –55°C 9 NO LOAD CURRENT SUPPLY CURRENT (μA) 8 7 6 5 4 1.4 3.4 5.4 7.4 9.4 11.4 13.4 15.4 17.4 SUPPLY VOLTAGE (V) 6700123 G11 40 30 20 10 0 0 0.2 0.4 0.6 0.8 1.0 1.2 SUPPLY VOLTAGE (V) 1.4 6700123 G12 Supply Current vs Output Sink Current 1000 TA = –40°C VS = 1.4V VS = 5V VS = 12V VS = 18V 1000 Supply Current vs Output Sink Current TA = 25°C VS = 1.4V VS = 5V VS = 12V VS = 18V 1000 Supply Current vs Output Sink Current TA = 85°C VS = 1.4V VS = 5V VS = 12V VS = 18V SUPPLY CURRENT (μA) SUPPLY CURRENT (μA) 100 100 SUPPLY CURRENT (μA) 100 6700123 G14 100 10 10 10 1 0.001 0.01 0.1 1 10 OUTPUT SINK CURRENT (mA) 100 6700123 G13 1 0.001 0.01 0.1 1 10 OUTPUT SINK CURRENT (mA) 1 0.001 0.1 1 10 0.01 OUTPUT SINK CURRENT (mA) 100 6700123 G15 Below Ground Input Bias Current 10000 VS = 18V –0.3V < VIB < 0V TA = 25°C TA = 85°C TA = 125°C TA = –55°C 3 Low Level Input Bias Current CURRENT IS POSITIVE GOING 2 INTO THE DEVICE INPUT BIAS CURRENT (nA) INPUT BIAS CURRENT (nA) 1 0 –1 –2 –3 –4 –5 –6 VS = 18V 0V < VIB < 1V TA = 25°C TA = 85°C TA = 125°C TA = –55°C 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 INPUT VOLTAGE (V) 1 10 High Level Input Bias Current CURRENT IS GOING INTO THE DEVICE INPUT BIAS CURRENT (nA) 1000 1 100 0.1 10 1 –0.3 CURRENT IS GOING OUT OF THE DEVICE –0.2 –0.1 INPUT VOLTAGE (V) 0 6700123 G16 –7 VS = 18V 0.01 VIB > 1V TA = 25°C TA = 85°C TA = 125°C 0.001 1 3 5 7 9 11 13 INPUT VOLTAGE (V) 15 17 6700123 G17 6700123 G18 6700123ff 12 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 TYPICAL PERFORMANCE CHARACTERISTICS Output Saturation Voltage vs Output Sink Current 1000 OUTPUT SATURATION VOLTAGE (mV) TA = –40°C VS = 1.4V VS = 5V VS = 12V VS = 18V 1000 OUTPUT SATURATION VOLTAGE (mV) TA = 25°C VS = 1.4V VS = 5V VS = 12V VS = 18V Output Saturation Voltage vs Output Sink Current 1000 OUTPUT SATURATION VOLTAGE (mV) Output Saturation Voltage vs Output Sink Current TA = 85°C VS = 1.4V VS = 5V VS = 12V VS = 18V 100 100 100 10 10 10 1 0.001 0.01 0.1 1 10 OUTPUT SINK CURRENT (mA) 100 6700123 G19 1 0.001 0.01 0.1 1 10 OUTPUT SINK CURRENT (mA) 100 6700123 G20 1 0.001 0.01 0.1 1 10 OUTPUT SINK CURRENT (mA) 100 6700123 G21 Output Short-Circuit Current 80 SHORT-CIRCUIT CURRENT (mA) SHORT-CIRCUIT CURRENT (mA) 70 60 50 40 30 20 10 0 0 2 4 VS = 5V TA = 25°C TA = 85°C TA = 125°C TA = –55°C 8 10 12 14 6 OUTPUT VOLTAGE (V) 16 18 80 70 60 50 40 30 20 10 0 Output Short-Circuit Current 10 OUTPUT LEAKAGE CURRENT (nA) Output Leakage Current 1 TA = 25°C VS = 1.4V VS = 5V VS = 12V VS = 18V 0.1 0.01 VS = 5V TA = 25°C TA = 85°C TA = 125°C TA = –55°C 0.001 0 2 4 8 10 12 14 6 OUTPUT VOLTAGE (V) 16 18 0 2 4 6 8 10 12 14 OUTPUT VOLTAGE (V) 16 18 6700123 G22 6700123 G23 6700123 G24 Propagation Delay vs Input Overdrive 60 50 PROPAGATION DELAY (μs) 40 30 20 10 0 TA = 25°C LH NONINV HL NONINV LH INV HL INV 100 Rise and Fall Times vs Output Pull-Up Resistor VS = 5V CL = 20pF TA = 25°C RISE 1 FALL VIN 10mV/DIV AC 0.1 VO(NINV) 5V/DIV DC VO(INV) 5V/DIV DC Noninverting and Inverting Comparator Propagation Delay RISE AND FALL TIME (μs) 10 0 20 60 80 40 INPUT OVERDRIVE (mV) 100 6700123 G25 0.01 0.1 1 10 100 OUTPUT PULL-UP RESISTOR (kΩ) 1000 VS = 15V 20μs/DIV TA = 25°C RLOAD = 10k CONNNECTED TO VS VIN(OVERDRIVE) = 10mV OVER THE INPUT VOLTAGE THRESHOLDS 6700123 G27 6700123 G26 6700123ff 13 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 APPLICATIONS INFORMATION The LT6700-1/LT6700-2/LT6700-3/LT6700HV-1/ LT6700HV-2/LT6700HV-3 devices are a family of dual micropower comparators with a built-in 400mV reference. Features include wide supply voltage range (1.4V to 18V), Over-The-Top input and output range, 2% accurate rising input threshold voltage and 6.5mV typical built-in hysteresis. The comparator’s open-collector outputs can sink up to 40mA typical. Internal Reference Each of the comparator sections has one input available externally, with the three versions of the part differing by the polarity of those available inputs (i.e., inverting or noninverting). The other comparator inputs are connected internally to the 400mV reference. The rising input threshold voltage of the comparators is designed to be equal to that of the reference (i.e., ≈ 400mV). The reference voltage is established with respect to the device GND connection. Hysteresis Each comparator has built-in 6.5mV (typical) hysteresis to simplify designs, ensure stable operation in the presence of noise at the inputs, and to reject supply rail noise that might be induced by state change load transients. The hysteresis is designed such that the falling input threshold voltage is nominally 393.5mV. External positive feedback circuitry can be employed with noninverting comparator inputs to increase effective hysteresis if desired, but such circuitry will provide an apparent effect on both the rising and falling input thresholds (the actual internal thresholds remain unaffected). Comparator Inputs A comparator input can swing from ground to 18V (36V for LT6700HV), regardless of the supply voltage used. The typical input current for inputs well above threshold (i.e., >800mV) is a few pA leaking into an input. With decreasing input voltage, a small bias current begins to be drawn out of the input, reaching a few nA when at ground potential. The input may be forced 100mV below ground without causing an improper output, though some additional bias current will begin to flow from the parasitic ESD input protection diode. Inputs driven further negative than 100mV below ground will not cause comparator malfunction or damage (provided the current is limited to 10mA), but the accuracy of the reference cannot be guaranteed, in which case the output state of the alternate comparator may be affected. Comparator Outputs The comparator outputs are open collector and capable of sinking 40mA typical. Load currents are directed out the GND pin of the part. The output off-state voltage may range between –0.3V and 18V (36V for LT6700HV) with respect to ground, regardless of the supply voltage used. When the output high state bias voltage is above 18V, a 100k minimum pull-up resistor is required and total load capacitor must be less than 100nF If the output high state . is above 18V, caution must be taken to prevent a short from the output directly to the bias voltage, even if the output is in the off state. As with any open-collector device, the outputs may be tied together to implement wire-AND logic functions. 6700123ff 14 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 APPLICATIONS INFORMATION Power Supplies The comparator family core circuitry operates from a single 1.4V to 18V supply. A minimum 0.1μF bypass capacitor is required between the VS pin and GND. When an output load is connected to the supply rail near the part and the output is sinking more than 5mA, a 1μF bypass capacitor is recommended. In instances where the supply is relatively “soft” (such as with small batteries) and susceptible to load steps, an additional 47Ω series decoupling resistor can further improve isolation of supply transients from the VS pin. Flexible Window Comparator Using the LT6700-1/LT6700HV-1 as shown in the circuits of Figure 1, the wire-AND configuration permits high accuracy window functions to be implemented with a simple 3-resistor voltage divider network. The section A comparator provides the VL trip-point and the section B comparator provides the VH trip-point, with the built-in hysteresis providing about 1.7% recovery level at each trip point to prevent output chatter. For designs that are to be optimized to detect departure from a window limit, the nominal resistor divider values are selected as follows (refer to the resistor designators shown on the first circuit of Figure 1): R1 ≤ 400k (this sets the divider current >> IB of inputs) R2 = R1 • (0.98 • VH /VL – 1) R3 = R1 • (2.5 • VH – 0.98 • VH /VL) To create window functions optimized for detecting entry into a window (i.e., where the output is to indicate a “com- 3.3V Supply Monitor 3.3V VL R3 301k 0.1μF R2 6.04k R1 40.2k VOUT VS +INA OUTA LT6700-1 –INB OUTB GND 33k VS VOUT HIGH = (3.1V < VS < 3.5V) 40.2k HYSTERESIS ZONES APPROXIMATELY 2% OF TRIP VOLTAGE 0.1μF 6.04k VH 487k 5V Supply Monitor 5V VS +INA OUTA LT6700-1 –INB OUTB GND 33k VOUT HIGH = (4.7V < VS < 5.3V) 6700123 F01 Figure 1. Simple Window Comparator 6700123ff 15 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 APPLICATIONS INFORMATION ing into spec” condition, as with the examples in Figure 1), the nominal resistor values are selected as follows: R1 ≤ 400k (this sets the divider current >> IB of inputs) R2 = R1 • (1.02 • VH /VL – 1) R3 = R1 • (2.54 • VH – 1.02 • VH/VL) The worst-case variance of the trip-points is related to the specified threshold limits of the LT6700/LT6700HV device and the basic tolerance of divider resistors used. For resistor tolerance RTOL (e.g. 0.01 for 1%), the worstcase trip-point voltage (either VH or VL) deviations can be predicted as follows (italicized values are taken from the datasheet, expressed in volts): Max dev VTRIP↑ = ±VTRIPnom • {2 • RTOL • [(VTRIPnom – 0.4) / VTRIPnom] + 1.25 • (VTH(R)max – VTH(R)min)} Max dev VTRIP↓ = ±VTRIPnom • {2 • RTOL • [(VTRIPnom – 0.39) / VTRIPnom] + 1.27 • (VTH(F)max – VTH(F)min)} Generating an External Reference Signal In some applications, it would be advantageous to have access to a signal that is directly related to the internal 400mV reference, even though the reference itself is not available externally. This can be accomplished to a reasonable degree by using an inverting comparator section as a “bang-bang” servo, establishing a nominal voltage, on an integration capacitor, that is scaled to the reference. This method is used in Figure 2, where the reference level has been doubled to drive a resistor bridge. The section B output cycles on and off to swing the section B input between its hysteresis trip points as the load capacitor charges and discharges in a shallow, controlled fashion. The multiplied reference signal also contains ripple that is the hysteresis multiplied by the same factor, so additional filtering is performed at the sense node of the bridge to prevent comparator chatter in the section A comparator, which is performing the actual conditional decision for the circuit. 0.1μF 1.4V TO 18V (IS ≈ 10μA) 2 • VREF RSET 499k VS +INA OUTA LT6700-1 –INB OUTB GND 3.3μF RTH T 499k 220k 220k* T < TSET 10k 3.3μF 6700123 F02 RTH = 1M (e.g., YSI 44015, 1.00MΩ AT 25°C) RSET = RTH AT TSET *RESISTANCE MAY REQUIRE OPTIMIZATION FOR OPERATION OVER INTENDED RTH AND VSUPPLY RANGES HYSTERESIS ZONE ≈0.4°C Figure 2. Micropower Thermostat/Temperature Alarm 6700123ff 16 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 APPLICATIONS INFORMATION Instrumentation Grade Pulse Width Modulator (PWM) Comparators with hysteresis are frequently employed to make simple oscillator structures, and the LT6700/ LT6700HV lends itself nicely to forming a charge-balancing PWM function. The circuit shown in Figure 3 forms a PWM that is intended to transmit an isolated representation of a voltage difference, rather like an isolated instrumentation amplifier. The section B comparator is used to generate a 2V reference supply level for the CMOS NOT gate (inverter), which serves as the precision switch element for the charge balancer. The heart of the charge balancer is the section A comparator, which is detecting slight charge or discharge states on the 0.22μF “integration” capacitor as it remains balanced at ≈400mV by feedback through the NOT gate. The input sense voltage, VIN, is converted to an imbalance current that the NOT gate duty cycle is continually correcting for, thus the digital waveform at the section A comparator output is a PWM representation of VIN with respect to the 2V “full scale.” In this particular circuit, the PWM information drives the LED of an optocoupler, allowing the VIN information to be coupled across a dielectric barrier. As an additional option to the circuit, the feedback loop can be broken and a second optocoupler employed to provide the charge balance management. This configuration allows for clocking the comparator output (externally to this circuit) and providing synchronous feedback such that a simple Δ∑ voltage-to-frequency conversion can be formed if desired. Approximately 11-bit accuracy and noise performance was observed in a one second integration period for duty factors from 1% to 99%. 3V NOM (IS < 3mA) Lithium COIN CELL 5 • VREF = 2V 22μF NC7S14 309k* 470Ω 412k* 10k 10k 3V/5V 10k + 10k** 0.1μF 750Ω 1 6 PWM OUT (OR ΔΣ SENSE) MOC-207 VS +INA OUTA LT6700-1 10k 2 5 3V/5V 750** + VIN 0V TO 2V 309k* 0.22μF†† 100k* 100k* –INB OUTB GND † 0.1μF 6 – 1 MOC-207** *1% METAL FILM **DELETE FOR PWM MODE †CONNECT FOR PWM MODE ††OPTIMIZED FOR 2kHz ΔΣ SAMPLING, f PWM(MAX) ≈ 0.6kHz 6700123 F03 5 2 ΔΣ SAMPLE IN Figure 3. Isolated PWM or Δ∑ Converter 6700123ff 17 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 PACKAGE INFORMATION DCB Package 6-Lead Plastic DFN (2mm × 3mm) (Reference LTC DWG # 05-08-1715) 0.70 ± 0.05 3.55 ± 0.05 1.65 ± 0.05 (2 SIDES) PACKAGE OUTLINE 2.15 ± 0.05 0.25 ± 0.05 0.50 BSC 1.35 ± 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 2.00 ± 0.10 (2 SIDES) R = 0.115 TYP R = 0.05 TYP 0.40 ± 0.10 4 6 3.00 ± 0.10 (2 SIDES) PIN 1 BAR TOP MARK (SEE NOTE 6) 1.65 ± 0.10 (2 SIDES) PIN 1 NOTCH R0.20 OR 0.25 × 45° CHAMFER 3 1 (DCB6) DFN 0405 0.200 REF 0.75 ± 0.05 0.25 ± 0.05 0.50 BSC 1.35 ± 0.10 (2 SIDES) 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (TBD) 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 6700123ff 18 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 PACKAGE INFORMATION S6 Package 6-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1636) 0.62 MAX 0.95 REF 2.90 BSC (NOTE 4) 1.22 REF 3.85 MAX 2.62 REF 1.4 MIN 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE ID RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.95 BSC 0.30 – 0.45 6 PLCS (NOTE 3) 0.80 – 0.90 0.20 BSC 1.00 MAX DATUM ‘A’ 0.01 – 0.10 0.30 – 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 0.09 – 0.20 (NOTE 3) 1.90 BSC S6 TSOT-23 0302 REV B 6700123ff Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 19 LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 TYPICAL APPLICATIONS PowerPath™ Controller B0520LW “WART” INPUT 3.3V NOM Si2301DS 10k VSUPPLY 1.6V MIN 3V NOM 1k 1M 1M VS +INA OUTA LT6700-3 R2 150k R1 249k +INB OUTB GND 100k + ALKALINE AA CELLS + VWART > 3.1V VBATT > 2V 1μF 6700123 TA04 R1 = 400k/(VBATT AT LOW – 0.4) R2 = 400k/(VBATT AT MAX – 0.4) HYSTERESIS ZONES APPROXIMATELY 2% OF TRIP VOLTAGE PowerPath IS A TRADEMARK OF LINEAR TECHNOLOGY CORPORATION 48V Status Monitor + 33k 1.74M LED OFF VOUT LED ON VIN HYSTERESIS ZONES APPROXIMATELY 2% OF TRIP VOLTAGE 10k 5.1V CMPZ5231B 2 6700123 TA03 22V CMPZ5251B 3V/5V 27k 1 33k 6 VOUT LOW = (39V < VIN < 70V) MOC-207 5 VL VH VIN 7.87k VS +INA OUTA LT6700-1 –INB OUTB GND 0.1μF – RELATED PARTS PART NUMBER LT1017/LT1018 LTC1441/LTC1442 LTC1998 LT6703 DESCRIPTION Micropower Dual Comparator Micropower Dual Comparator with 1% Reference Micropower Comparator for Battery Monitoring Micropower Comparator with 400mV Reference COMMENTS 1.1V (Min) Supply Voltage, ±1.4mV (Max) Input Offset 1.182 ±1% Reference, ±10mV (Max) Input Offset 2.5μA Typ Supply Current, Adjustable Threshold and Hysteresis 1.4V to 18V Supply Current, 6.5μA Supply Current 6700123ff 20 Linear Technology Corporation (408) 432-1900 ● FAX: (408) 434-0507 ● LT 0908 REV F • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 www.linear.com © LINEAR TECHNOLOGY CORPORATION 2003