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FEATURES
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LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 Micropower, Low Voltage, Dual Comparator with 400mV Reference DESCRIPTION
The LT (R) 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 6.5A, 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 25C Inputs and Outputs Operate to 36V Wide Supply Range: 1.4V to 18V Specified for -55C to 125C Temperature Range Low Quiescent Current: 6.5A Typ at 5V Internal Hysteresis: 6.5mV Typ Low Input Bias Current: 10nA Max Over-The-Top(R) Input also Includes Ground Open-Collector Outputs Allow Level Translation Choice of Input Polarities: LT6700-1/LT6700-2/ LT6700-3/LT6700HV-1/LT6700HV-2/LT6700HV-3 Available in Low Profile (1mm) SOT-23 (ThinSOTTM) and 2mm x 3mm DFN Packages
APPLICATIONS
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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
+
0.1F
ALKALINE AA CELLS
+ +
-
VR = 400mV REFERENCE COMP A VBATT > 2V VS
FALLING INPUT
- +
261k
MONITOR CONSUMES ~10A HYSTERESIS IS APPROXIMATELY 2% OF TRIP VOLTAGE
6700123 TA01
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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 ...........................- 40C to 85C LT6700IS6/LT6700HVIS6/ LT6700IDCB-1/-2/-3 ............................ -40C to 85C LT6700HS6/LT6700HVHS6/ LT6700HDCB-1/-2/-3 ........................ -40C to 125C
Specified Temperature Range (Note 5) LT6700CS6/LT6700HVCS6/ LT6700CDCB-1/-2/-3 .............................. 0C to 70C LT6700IS6/LT6700HVIS6/ LT6700IDCB-1/-2/-3 ............................ -40C to 85C LT6700HS6/LT6700HVHS6/ LT6700HDCB-1/-2/-3 ....................... -40C to 125C LT6700MPDCB-1/-2/-3 .................... -55C to 125C Maximum Junction Temperature S6 Package ....................................................... 150C DCB6 Package .................................................. 150C Storage Temperature Range S6 Package ........................................ -65C to 150C DCB6 Package ................................... -65C to 150C Lead Temperature, TSOT-23 (Soldering, 10 sec)... 300C
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 = 150C, JA = 230C/W
S6 PACKAGE 6-LEAD PLASTIC TSOT-23 TJMAX = 150C, JA = 230C/W
S6 PACKAGE 6-LEAD PLASTIC TSOT-23 TJMAX = 150C, JA = 230C/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 x 3mm) PLASTIC DFN TJMAX = 125C, JA = 64C/W SOLDERED EXPOSED PAD (PIN 7) INTERNALLY CONNECTED TO GND (PCB CONNECTION OPTIONAL)
DCB6 PACKAGE 6-LEAD (2mm x 3mm) PLASTIC DFN TJMAX = 125C, JA = 64C/W SOLDERED EXPOSED PAD (PIN 7) INTERNALLY CONNECTED TO GND (PCB CONNECTION OPTIONAL)
DCB6 PACKAGE 6-LEAD (2mm x 3mm) PLASTIC DFN TJMAX = 125C, JA = 64C/W SOLDERED EXPOSED PAD (PIN 7) INTERNALLY CONNECTED TO GND (PCB CONNECTION OPTIONAL)
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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 0C to 70C 0C to70C -40C to 85C -40C to 85C -40C to 125C -40C to 125C 0C to 70C 0C to 70C -40C to 85C -40C to 85C -40C to 125C -40C to 125C 0C to 70C 0C to 70C -40C to 85C -40C to 85C -40C to 125C -40C to 125C 0C to 70C -40C to 85C -40C to 125C -55C to 125C 0C to 70C -40C to 85C -40C to 125C -55C to 125C 0C to 70C -40C to 85C -40C to 125C -55C to 125C 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 x 3mm) Plastic DFN LT6700IDCB-1#TRMPBF LT6700IDCB-1#TRPBF LBXW 6-Lead (2mm x 3mm) Plastic DFN LT6700HDCB-1#TRMPBF LT6700HDCB-1#TRPBF LBXW 6-Lead (2mm x 3mm) Plastic DFN LT6700MPDCB-1#TRMPBF LT6700MPDCB-1#TR LDVS 6-Lead (2mm x 3mm) Plastic DFN LT6700CDCB-2#TRMPBF LT6700CDCB-2#TRPBF LBXX 6-Lead (2mm x 3mm) Plastic DFN LT6700IDCB-2#TRMPBF LT6700IDCB-2#TRPBF LBXX 6-Lead (2mm x 3mm) Plastic DFN LT6700HDCB-2#TRMPBF LT6700HDCB-2#TRPBF LBXX 6-Lead (2mm x 3mm) Plastic DFN LT6700MPDCB-2#TRMPBF LT6700MPDCB-2#TR LDVT 6-Lead (2mm x 3mm) Plastic DFN LT6700CDCB-3#TRMPBF LT6700CDCB-3#TRPBF LBXY 6-Lead (2mm x 3mm) Plastic DFN LT6700IDCB-3#TRMPBF LT6700IDCB-3#TRPBF LBXY 6-Lead (2mm x 3mm) Plastic DFN LT6700HDCB-3#TRMPBF LT6700HDCB-3#TRPBF LBXY 6-Lead (2mm x 3mm) Plastic DFN LT6700MPDCB-3#TRMPBF LT6700MPDCB-3#TR LDVV 6-Lead (2mm x 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/
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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 = 25C, (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 A A s s s s
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
A A A A
The l denotes the specifications which apply over the temperature range of 0C TA 70C, (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)
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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 0C TA 70C, (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 A A A A A A
VOL
Output Low Voltage
IOFF IS
Output Leakage Current Supply Current
The l denotes the specifications which apply over the temperature range of -40C TA 85C, (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 A A A A A A
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
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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 -40C TA 125C, (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 A A A A A A
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 -55C TA 125C, (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
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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 -55C TA 125C, (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 A A A A A A
TA = 25C, (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 A A s s s s
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
A A A A
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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 0C TA 70C, (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 A A A A A A
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 -40C TA 85C, (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 A A
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
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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 -40C TA 85C, (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 A A A A
The l denotes the specifications which apply over the temperature range of -40C TA 125C, (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 A A A A A A
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 - 40C to 85C. The LT6700H-1/-2/-3/ LT6700HVH-1/-2/-3 is guaranteed functional over the operating
temperature range of -40C to 125C. The LT6700MP-1/-2/-3 is guaranteed functional over the operating temperature range of -55C to 125C. Note 5: The LT6700C-1/-2/-3/LT6700HVC-1/-2/-3 is guaranteed to meet the specified performance from 0C to 70C. The LT6700C-1/-2/3/LT6700HVC-1/-2/-3 are designed, characterized and expected to meet specified performance from - 40C to 85C 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 -40C to 85C. The LT6700H-1/-2/-3/LT6700HVH-1/-2/-3 is guaranteed to meet specified performance from -40C to 125C.The LT6700MP-1/-2/-3 is guaranteed to meet specified performance from -55C to 125C. 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 = 25C
VS = 5V TA = 25C
VS = 5V TA = 25C
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 = 25C TA = 85C TA = 125C TA = -55C
#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 = 25C TA = 85C TA = 125C TA = -55C
VS = 1.4V VS = 5V VS = 12V VS = 18V
HYSTERESIS (mV)
6700123 G09
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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 = 25C TA = 85C TA = 125C TA = -55C 1.3 1.7 1.5 SUPPLY VOLTAGE (V) 1.9
6700123 G10
Quiescent Supply Current vs Supply Voltage
10 TA = 25C TA = 85C TA = 125C TA = -55C SUPPLY CURRENT (A) 50
Start-Up Supply Current
TA = 25C TA = 85C TA = 125C TA = -55C
9 NO LOAD CURRENT SUPPLY CURRENT (A) 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 = -40C VS = 1.4V VS = 5V VS = 12V VS = 18V 1000
Supply Current vs Output Sink Current
TA = 25C VS = 1.4V VS = 5V VS = 12V VS = 18V 1000
Supply Current vs Output Sink Current
TA = 85C VS = 1.4V VS = 5V VS = 12V VS = 18V
SUPPLY CURRENT (A)
SUPPLY CURRENT (A)
100
100
SUPPLY CURRENT (A) 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 = 25C TA = 85C TA = 125C TA = -55C 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 = 25C TA = 85C TA = 125C TA = -55C 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 = 25C TA = 85C TA = 125C 0.001 1 3 5 7 9 11 13 INPUT VOLTAGE (V)
15
17
6700123 G17
6700123 G18
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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 = -40C VS = 1.4V VS = 5V VS = 12V VS = 18V 1000 OUTPUT SATURATION VOLTAGE (mV) TA = 25C 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 = 85C 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 = 25C TA = 85C TA = 125C TA = -55C 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 = 25C VS = 1.4V VS = 5V VS = 12V VS = 18V
0.1
0.01
VS = 5V TA = 25C TA = 85C TA = 125C TA = -55C
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 (s) 40 30 20 10 0 TA = 25C LH NONINV HL NONINV LH INV HL INV 100
Rise and Fall Times vs Output Pull-Up Resistor
VS = 5V CL = 20pF TA = 25C 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 (s)
10
0
20
60 80 40 INPUT OVERDRIVE (mV)
100
6700123 G25
0.01 0.1
1 10 100 OUTPUT PULL-UP RESISTOR (k)
1000
VS = 15V 20s/DIV TA = 25C RLOAD = 10k CONNNECTED TO VS VIN(OVERDRIVE) = 10mV OVER THE INPUT VOLTAGE THRESHOLDS
6700123 G27
6700123 G26
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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.
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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 0.1F 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 1F bypass capacitor is recommended. In instances where the supply is relatively "soft" (such as with small batteries) and susceptible to load steps, an additional 47 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 0.1F 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 0.1F 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.
0.1F 1.4V TO 18V (IS 10A)
2 * VREF RSET 499k VS +INA OUTA LT6700-1 -INB OUTB GND 3.3F RTH T 499k 220k
220k* T < TSET
10k
3.3F
6700123 F02
RTH = 1M (e.g., YSI 44015, 1.00M AT 25C) RSET = RTH AT TSET *RESISTANCE MAY REQUIRE OPTIMIZATION FOR OPERATION OVER INTENDED RTH AND VSUPPLY RANGES HYSTERESIS ZONE 0.4C
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 0.22F "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 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 22F NC7S14 309k* 470 412k* 10k 10k
3V/5V 10k
+
10k**
0.1F
750 1 6
PWM OUT (OR SENSE) MOC-207
VS +INA OUTA LT6700-1 10k
2
5 3V/5V 750**
+
VIN 0V TO 2V
309k* 0.22F 100k* 100k*
-INB OUTB GND
0.1F 6
-
1 MOC-207**
*1% METAL FILM **DELETE FOR PWM MODE CONNECT FOR PWM MODE OPTIMIZED FOR 2kHz SAMPLING, f PWM(MAX) 0.6kHz
6700123 F03
5
2 SAMPLE IN
Figure 3. Isolated PWM or Converter
6700123ff
17
LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 PACKAGE INFORMATION
DCB Package 6-Lead Plastic DFN (2mm x 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 x 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
PowerPathTM 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 1F
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 0.1F
-
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 2.5A Typ Supply Current, Adjustable Threshold and Hysteresis 1.4V to 18V Supply Current, 6.5A 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
(c) LINEAR TECHNOLOGY CORPORATION 2003

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