FEATURES
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LT6700/LT6700HV
Micropower, Low Voltage,
Dual Comparator with
400mV Reference
DESCRIPTION
The
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 polar-
ity of the available comparator inputs. The LT6700-1/
LT6700HV-1 has one inverting input and one noninvert-
ing input, making it suitable for use as a window com-
parator. The LT6700-2/LT6700HV-2 has two inverting
inputs and the LT6700-3/LT6700HV-3 has two nonin-
verting inputs. All versions are offered in commercial,
industrial and automotive temperature ranges.
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.
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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
Choice 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
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Battery-Powered System Monitoring
Threshold Detectors
Window Comparators
Relay Driving
Industrial Control Systems
Handheld Instruments
Automotive Monitor and Controls
TYPICAL APPLICATION
Micropower Battery Monitor
1M
LT6700-3
1M
COMP B
THRESHOLD VOLTAGE (mV)
V
BATT
> 1.6V
63.4k
1M
V
BATT
1.4V (MIN)
3V (NOM)
Comparator Thresholds
vs Temperature
406
404
402
400
398
396
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
+
0.1µF
#1A
#1B
#2A
#2B
RISING INPUT
ALKALINE
AA CELLS
+
+
–
V
R
= 400mV
REFERENCE
V
S
FALLING INPUT
–
+
261k
COMP A
V
BATT
> 2V
MONITOR CONSUMES ~10µA
HYSTERESIS IS APPROXIMATELY
2% OF TRIP VOLTAGE
6700123 TA01
6700123fh
For more information
www.linear.com/LT6700
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LINEAR_DIMENSIONS [ LINEAR DIMENSIONS SEMICONDUCTOR ]
