LT6700/LT6700HV
Micropower, Low Voltage,
Dual Comparator with
400mV Reference
FEATURES DESCRIPTION
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Internal 400mV Reference
The LT 6700/LT6700HV combine two micropower, low
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Total Threshold Error: 1.25% Max at 25C
voltage comparators with a 400mV reference in a 6-lead
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Inputs and Outputs Operate to 36V
SOT-23 or tiny DFN package. Operating with supplies from
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Wide Supply Range: 1.4V to 18V
1.4V up to 18V, these devices draw only 6.5A, making
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Specified for 55C to 125C Temperature Range
them ideal for low voltage system monitoring. Hysteresis
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Low Quiescent Current: 6.5A Typ at 5V
is included in the comparators, easing design requirements
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Internal Hysteresis: 6.5mV Typ
to insure stable output operation.
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Low Input Bias Current: 10nA Max
The comparators each have one input available externally;
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Over-The-Top Input also Includes Ground
the other inputs are connected internally to the reference.
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Open-Collector Outputs Allow Level Translation
The comparator outputs are open collector and the output
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Choice of Input Polarities: LT6700-1/LT6700-2/
load can be referred to any voltage up to 18V (36V for
LT6700-3/LT6700HV-1/LT6700HV-2/LT6700HV-3
LT6700HV), independent of supply voltage. The output
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Available in Low Profile (1mm) SOT-23 (ThinSOT)
stage sinking capability is guaranteed to be greater than
and 2mm 3mm DFN Packages
5mA over temperature.
The three versions of this part differ by the polar-
APPLICATIONS
ity of the available comparator inputs. The LT6700-1/
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Battery-Powered System Monitoring
LT6700HV-1 has one inverting input and one noninvert-
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Threshold Detectors
ing input, making it suitable for use as a window com-
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Window Comparators
parator. The LT6700-2/LT6700HV-2 has two inverting
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Relay Driving
inputs and the LT6700-3/LT6700HV-3 has two nonin-
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Industrial Control Systems
verting inputs. All versions are offered in commercial,
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Handheld Instruments
industrial and automotive temperature ranges.
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Automotive Monitor and Controls
L, LT, LTC, LTM, Linear Technology, the Linear logo and Over-The-Top are registered
trademarks and ThinSOT and PowerPath are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Micropower Battery Monitor
Comparator Thresholds
V
BATT
1.4V (MIN) vs Temperature
3V (NOM)
LT6700-3 406
1M 1M 1M
#1A #2A
#1B #2B
COMP B
404
+
RISING INPUT
0.1F
402
V > 1.6V
BATT
400
63.4k
+
ALKALINE
398
+
AA CELLS V
S
V = 400mV
R
REFERENCE 396
FALLING INPUT
394
COMP A
TWO TYPICAL PARTS
392
COMP A AND B
V > 2V
BATT
V = 5V
S
390
+
60 40 20 0 20 40 60 80 100 120
MONITOR CONSUMES ~10A
TEMPERATURE (C)
261k HYSTERESIS IS APPROXIMATELY
2% OF TRIP VOLTAGE
6700123 TA02
6700123 TA01
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For more information www.linear.com/LT6700 1
THRESHOLD VOLTAGE (mV)LT6700/LT6700HV
(Note 1)
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V to GND) ..........................18.5V Specified Temperature Range (Note 5)
S
Input Voltage (+IN, IN) LT6700CS6/LT6700HVCS6/
LT6700 (Note 3) .......................... 18.5V to (GND 0.3V) LT6700CDCB-1/-2/-3 .............................. 0C to 70C
LT6700HV (Note 3) ........................ 40V to (GND 0.3V) LT6700IS6/LT6700HVIS6/
LT6700 Output Voltage (OUT) ..... 18.5V to (GND 0.3V) LT6700IDCB-1/-2/-3 ............................ 40C to 85C
LT6700HV Output Voltage (OUT) ... 40V to (GND 0.3V) LT6700HS6/LT6700HVHS6/
Output Short-Circuit Duration (Note 2) ............ Indefinite LT6700HDCB-1/-2/-3 ....................... 40C to 125C
Input Current (Note 3) ..........................................10mA LT6700MPDCB/
Operating Temperature Range (Note 4) LT6700PMS6-1/-2/-3 ......................... 55C to 125C
LT6700CS6/LT6700HVCS6/ Maximum Junction Temperature
LT6700CDCB-1/-2/-3 ...........................40C to 85C S6 Package ....................................................... 150C
LT6700IS6/LT6700HVIS6/ DCB6 Package .................................................. 150C
LT6700IDCB-1/-2/-3 ............................ 40C to 85C Storage Temperature Range
LT6700HS6/LT6700HVHS6/ S6 Package ........................................ 65C to 150C
LT6700HDCB-1/-2/-3 ........................ 40C to 125C DCB6 Package ................................... 65C to 150C
LT6700MPDCB/ Lead Temperature, TSOT-23 (Soldering, 10 sec) ... 300C
LT6700MPS6-1/-2/-3 ......................... 55C to 125C
PIN CONFIGURATION
LT6700-1 LT6700-2 LT6700-3
LT6700HV-1 LT6700HV-2 LT6700HV-3
TOP VIEW TOP VIEW TOP VIEW
OUTA 1 6 OUTB OUTA 1 6 OUTB OUTA 1 6 OUTB
GND 2 5 V GND 2 5 V GND 2 5 V
S S S
+INA 3 4 INB INA 3 4 INB +INA 3 4 +INB
S6 PACKAGE S6 PACKAGE S6 PACKAGE
6-LEAD PLASTIC TSOT-23 6-LEAD PLASTIC TSOT-23 6-LEAD PLASTIC TSOT-23
T = 150C, = 230C/W T = 150C, = 230C/W T = 150C, = 230C/W
JMAX JA JMAX JA JMAX JA
LT6700-1 LT6700-2 LT6700-3
TOP VIEW TOP VIEW TOP VIEW
6 6 6
OUTA 1 + INA OUTA 1 INA OUTA 1 + INA
7 7 7
OUTB 2 5 GND OUTB 2 5 GND OUTB 2 5 GND
V 3 4 INB V 3 4 INB V 3 4 +INB
S S S
DCB6 PACKAGE DCB6 PACKAGE DCB6 PACKAGE
6-LEAD (2mm 3mm) PLASTIC DFN 6-LEAD (2mm 3mm) PLASTIC DFN 6-LEAD (2mm 3mm) PLASTIC DFN
T = 125C, = 64C/W T = 125C, = 64C/W T = 125C, = 64C/W
JMAX JA JMAX JA JMAX JA
SOLDERED EXPOSED PAD (PIN 7) SOLDERED EXPOSED PAD (PIN 7) SOLDERED EXPOSED PAD (PIN 7)
INTERNALLY CONNECTED TO GND INTERNALLY CONNECTED TO GND INTERNALLY CONNECTED TO GND
(PCB CONNECTION OPTIONAL) (PCB CONNECTION OPTIONAL) (PCB CONNECTION OPTIONAL)
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2 For more information www.linear.com/LT6700