LT6700-1 Datasheet, PDF (1/12 Pages) Linear Technology – Micropower, Low Voltage, SOT-23, Dual Comparator with 400mV Reference

LT6700-1/LT6700-2/LT6700-3
Micropower, Low Voltage,
SOT-23, Dual Comparator
with 400mV Reference
FEATURES
s _{Low Quiescent Current: 6.5µA Typ at 5V}
s _{Wide Supply Range: 1.4V to 18V}
s _{400mV Reference ±2% Accuracy Over Temperature}
s _{Input Range Includes Ground}
s _Over-The-Top^® _{Input Range}
s _{Over-The-Top Open-Collector Outputs}
s _{Internal Hysteresis: 6.5mV Typ}
s _{Low Input Bias Current: ±10nA Max}
s _{40mA Typical Output Sink Current}
s _{Supports Wired-AND Connections}
s _{Choice of Input Polarities: LT6700-1/LT6700-2/}
LT6700-3
s _{Low Profile (1mm) SOT-23 (ThinSOT}^TM_{) Package}
U
APPLICATIO S
s _{Battery-Powered System Monitoring}
s _{Threshold Detectors}
s _{Window Comparators}
s _{Relay Driving}
s _{Optoisolator Driving}
s _{Industrial Control Systems}
s _{Handheld Instruments}
DESCRIPTIO
The LT^®6700-1/LT6700-2/LT6700-3 combine two mi-
cropower, low voltage comparators with a 400mV refer-
ence in the 6-lead SOT-23 package. Operating with supplies
from 1.4V up to 18V, the devices draw only 6.5µA typical,
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, independent
of supply voltage. The output stage sinking capability is
guaranteed greater than 5mA over temperature.
The three versions of the part differ by the polarity of the
available comparator inputs. The LT6700-1 has one in-
verting input and one noninverting input, making it suit-
able for use as a window comparator. The LT6700-2 has
two inverting inputs and the LT6700-3 has two noninvert-
ing inputs. All versions are offered in commercial, indus-
trial and automotive temperature ranges.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Over-The-Top is a registered trademark of Linear Technology.
ThinSOT is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
+
ALKALINE
AA CELLS
+
Micropower Battery Monitor
5
1M ^LT6700-3
1M
4
+
COMP B
6
63.4k
–
V_BATT
1.4V (MIN)
3V (NOM)
1M
V_BATT > 1.6V
V_R = 400mV ^VS
REFERENCE
3
261k
–
COMP A
+
2
1
V_BATT > 2V
0.1µF
6700123 TA01
MONITOR CONSUMES ~10µA
HYSTERESIS IS APPROXIMATELY
2% OF TRIP VOLTAGE
Comparator Thresholds
vs Temperature
406
#1A
#2A
404
#1B
#2B
RISING INPUT
402
400
398
396
FALLING INPUT
394
TWO TYPICAL PARTS
392 _{COMP A AND B}
V_S = 5V
390
–60 –40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
6700123 TA02
6700123fb
1