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LTC1440CMS8 Datasheet Download

Part No.:
LTC1440CMS8
Download:
Download Datasheet
Description:
[Ultralow Power Single/Dual Comparator with Reference]
File Size:
271 K
Page:
12 Pages
Logo:
Manufacturer:
LINER [ LINEAR TECHNOLOGY ]
PCB Prototype
 LTC1440CMS8 Datasheet Page:2LTC1440CMS8 Datasheet Page:3LTC1440CMS8 Datasheet Page:4LTC1440CMS8 Datasheet Page:5LTC1440CMS8 Datasheet Page:6LTC1440CMS8 Datasheet Page:7LTC1440CMS8 Datasheet Page:8LTC1440CMS8 Datasheet Page:9 
LTC1440/LTC1441/LTC1442
Ultralow Power Single/Dual
Comparator with Reference
FEATURES
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DESCRIPTION
The LTC
®
1440/LTC1441/LTC1442 are ultralow power
single and dual comparators with built-in references. The
comparators feature less than 3.7µA supply current over
temperature (LTC1440), a 1.182V
±1%
reference, pro-
grammable hysteresis (LTC1440/LTC1442) and TTL/CMOS
outputs that sink and source current. The reference output
can drive a bypass capacitor of up to 0.01µF without
oscillation.
The comparators operate from a single 2V to 11V supply
or a dual
±1V
to
±5.5V
supply (LTC1440). Comparator
hysteresis is easily programmed by using two resistors
and the HYST pin (LTC1440/LTC1442). Each comparator’s
input operates from the negative supply to within 1.3V of
the positive supply. The comparator output stage can
continuously source up to 40mA. By eliminating the
cross-conducting current that normally happens when the
comparator changes logic states, the power supply glitches
are eliminated.
The LTC1440 is available in 8-pin PDIP, SO and MSOP
packages. The LTC1441/LTC1442 are available in 8-pin
PDIP and SO packages.
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s
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Ultralow Quiescent Current: 2.1
µ
A Typ (LTC1440)
Wide Supply Range:
Single: 2V to 11V
Dual:
±1V
to
±5.5V
Input Voltage Range Includes the Negative Supply
Reference Output Drives 0.01
µ
F Capacitor
Adjustable Hysteresis (LTC1440/LTC1442)
TTL/CMOS Compatible Outputs
12µs Propagation Delay with 10mV Overdrive
No Crowbar Current
40mA Continuous Source Current
Pin Compatible Upgrades for MAX921/922/923
APPLICATIONS
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Battery-Powered System Monitoring
Threshold Detectors
Window Comparators
Oscillator Circuits
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
Micropower 2.9V V
CC
Threshold Detector
3.3V
5.0
LTC1440 Supply Current vs Temperature
R1
1.65M
1%
R2
1.13M
1%
7
V
+
SUPPLY CURRENT (µA)
4.5
4.0
3.5
3.0
2.5
2.0
V
+
= 5V
V
= GND = 0V
3 IN
+
+
8
OUT
4 IN
5 HYST
LTC1440
6 REF
V
2
GND
1
1440 TA01
1.5
–40 –20
U
U
U
40
20
60
0
TEMPERATURE (°C)
80
100
1440/1/2 TA02
1