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LT6700-3

Description
Micropower, Low Voltage, SOT-23, Dual Comparator with 400mV Reference
File Size223KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet View All

LT6700-3 Overview

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
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s
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DESCRIPTIO
s
Low Quiescent Current: 6.5µA Typ at 5V
Wide Supply Range: 1.4V to 18V
400mV Reference
±2%
Accuracy Over Temperature
Input Range Includes Ground
Over-The-Top
®
Input Range
Over-The-Top Open-Collector Outputs
Internal Hysteresis: 6.5mV Typ
Low Input Bias Current:
±10nA
Max
40mA Typical Output Sink Current
Supports Wired-AND Connections
Choice of Input Polarities: LT6700-1/LT6700-2/
LT6700-3
Low Profile (1mm) SOT-23 (ThinSOT
TM
) Package
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.
APPLICATIO S
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Battery-Powered System Monitoring
Threshold Detectors
Window Comparators
Relay Driving
Optoisolator Driving
Industrial Control Systems
Handheld Instruments
TYPICAL APPLICATIO
LT6700-3
4
Micropower Battery Monitor
V
BATT
1.4V (MIN)
3V (NOM)
5
1M
1M
COMP B
V
BATT
> 1.6V
1M
406
404
+
THRESHOLD VOLTAGE (mV)
6
63.4k
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
ALKALINE
AA CELLS
+
+
V
R
= 400mV
REFERENCE
COMP A
V
S
3
261k
1
V
BATT
> 2V
MONITOR CONSUMES ~10µA
HYSTERESIS IS APPROXIMATELY
2% OF TRIP VOLTAGE
+
0.1µF
2
6700123 TA01
U
Comparator Thresholds
vs Temperature
#1A
#1B
#2A
#2B
RISING INPUT
FALLING INPUT
U
U
6700123fb
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