LT6700/LT6700HV
1
6700123fh
For more information www.linear.com/LT6700
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Micropower, Low Voltage,
Dual Comparator with
400mV Reference
The LT
®
6700/LT6700HV 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.
Micropower Battery Monitor
n
Internal 400mV Reference
n
Total Threshold Error: ±1.25% Max at 25°C
n
Inputs and Outputs Operate to 36V
n
Wide Supply Range: 1.4V to 18V
n
Specified for –55°C to 125°C Temperature Range
n
Low Quiescent Current: 6.5µA Typ at 5V
n
Internal Hysteresis: 6.5mV Typ
n
Low Input Bias Current: ±10nA Max
n
Over-The-Top
®
Input also Includes Ground
n
Open-Collector Outputs Allow Level Translation
n
Choice of Input Polarities: LT6700-1/LT6700-2/
LT6700-3/LT6700HV-1/LT6700HV-2/LT6700HV-3
n
Available in Low Profile (1mm) SOT-23 (ThinSOT™)
and 2mm × 3mm DFN Packages
n
Battery-Powered System Monitoring
n
Threshold Detectors
n
Window Comparators
n
Relay Driving
n
Industrial Control Systems
n
Handheld Instruments
n
Automotive Monitor and Controls
Comparator Thresholds
vs Temperature
–
+
–
+
COMP B
1M
COMP A
ALKALINE
AA CELLS
V
R
= 400mV
REFERENCE
1M
0.1µF
LT6700-3
63.4k
261k
1M
V
BATT
> 1.6V
V
BATT
> 2V
MONITOR CONSUMES ~10µA
HYSTERESIS IS APPROXIMATELY
2% OF TRIP VOLTAGE
6700123 TA01
V
BATT
1.4V (MIN)
3V (NOM)
+
+
V
S
TEMPERATURE (°C)
–60
THRESHOLD VOLTAGE (mV)
398
400
402
120
6700123 TA02
396
394
390
–40 –20 0
20 40 60 80 100
392
406
404
TWO TYPICAL PARTS
COMP A AND B
V
S
= 5V
#1A
#1B
#2A
#2B
RISING INPUT
FALLING INPUT
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