Datasheet LTC1443, LTC1444, LTC1445 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Ultralow Power Quad Comparators with Reference |
| Pages / Page | 14 / 1 — FeaTures. DescripTion. Ultralow Quiescent Current: 8.5µA Max. Reference … |
| File Format / Size | PDF / 238 Kb |
| Document Language | English |
FeaTures. DescripTion. Ultralow Quiescent Current: 8.5µA Max. Reference Output Drives 0.01µF Capacitor
Model Line for this Datasheet
- LTC1443CDHD#PBF LTC1443CDHD#PBF LTC1443CDHD#TRPBF LTC1443CDHD#TRPBF LTC1443CN#PBF LTC1443CN#PBF LTC1443CS#PBF LTC1443CS#PBF LTC1443CS#TRPBF LTC1443CS#TRPBF LTC1443IDHD#PBF LTC1443IDHD#PBF LTC1443IDHD#TRPBF LTC1443IDHD#TRPBF LTC1443IN#PBF LTC1443IN#PBF LTC1443IS#PBF LTC1443IS#PBF LTC1443IS#TRPBF LTC1443IS#TRPBF
- LTC1444CDHD#PBF LTC1444CDHD#PBF LTC1444CDHD#TRPBF LTC1444CDHD#TRPBF LTC1444CN#PBF LTC1444CN#PBF LTC1444CS#PBF LTC1444CS#PBF LTC1444CS#TRPBF LTC1444CS#TRPBF LTC1444IDHD#PBF LTC1444IDHD#PBF LTC1444IDHD#TRPBF LTC1444IDHD#TRPBF LTC1444IN#PBF LTC1444IN#PBF LTC1444IS#PBF LTC1444IS#PBF LTC1444IS#TRPBF LTC1444IS#TRPBF
- LTC1445CDHD#PBF LTC1445CDHD#PBF LTC1445CDHD#TRPBF LTC1445CDHD#TRPBF LTC1445CN#PBF LTC1445CN#PBF LTC1445CS#PBF LTC1445CS#PBF LTC1445CS#TRPBF LTC1445CS#TRPBF LTC1445IDHD#PBF LTC1445IDHD#PBF LTC1445IDHD#TRPBF LTC1445IDHD#TRPBF LTC1445IN#PBF LTC1445IN#PBF LTC1445IS#PBF LTC1445IS#PBF LTC1445IS#TRPBF LTC1445IS#TRPBF
Text Version of Document
LTC1443/LTC1444/LTC1445 Ultralow Power Quad Comparators with Reference
FeaTures DescripTion
n
Ultralow Quiescent Current: 8.5µA Max
The LTC®1443/LTC1444/LTC1445 are ultralow power quad n
Reference Output Drives 0.01µF Capacitor
comparators with a built-in reference. The comparators n
Adjustable Hysteresis (LTC1444/LTC1445)
feature less than 8.5µA supply current over temperature, n
Wide Supply Range an internal reference (1.182V ±1% for LTC1443 or 1.221V
Single: 2V to 11V
±1% for LTC1444/LTC1445), programmable hysteresis
Dual: ±1V to ±5.5V (LTC1444/LTC1445) and TTL/CMOS output (LTC1443/ n
Input Voltage Range Includes the Negative Supply LTC1445) that sinks and sources current (open-drain n
TTL/CMOS Compatible Outputs output for LTC1444). The reference output can drive a n
Propagation Delay: 12µs (Typ) (10mV Overdrive) bypass capacitor of up to 0.01µF without oscillation. n
No Crowbar Current The comparators operate from a single 2V to 11V supply n
40mA Continuous Source Current or a dual ±1V to ±5.5V supply (LTC1443). Comparator n
Pin Compatible Upgrades for MAX924 (LTC1443) hysteresis is easily programmable using two resistors and n
Low Profile (5mm × 4mm × 0.8mm) DFN Package the HYST pin (LTC1444/LTC1445). Each comparator’s input operates from the negative supply to within 1.3V of
applicaTions
the positive supply. The LTC1443/LTC1445 comparator n output stage can continuously source up to 40mA. By Battery-Powered System Monitoring n eliminating the cross-conducting current that normally Threshold Detectors n happens when the comparator changes logic states, power Window Comparators n supply glitches are eliminated. Oscillator Circuits L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear The LTC1443/LTC1444/LTC1445 are available in the Technology Corporation. All other trademarks are the property of their respective owners. 16-pin SO, PDIP and DFN packages.
Typical applicaTion Reference Settling Test Circuit Reference Settling
V 3 IN 8V V+ 3.4M 5V V+ 1% TO 8V IN A+ 5 5V + 2 OUT VREF 4 IN A– – 2mV/DIV 14 HYST 1.21M R1 1% 10k LTC1445 8 REF OUT + 1.2V 144345 TA02 R2 R3 – 2ms/DIV 2.4M 430Ω V– C1 9 1.0µF 144345 TA01 144345fe 1 Document Outline Features Applications Description Absolute Maximum Ratings Typical Application Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Applications Information Package Description Revision History Typical Application Related Parts
FeaTures DescripTion
n
Ultralow Quiescent Current: 8.5µA Max
The LTC®1443/LTC1444/LTC1445 are ultralow power quad n
Reference Output Drives 0.01µF Capacitor
comparators with a built-in reference. The comparators n
Adjustable Hysteresis (LTC1444/LTC1445)
feature less than 8.5µA supply current over temperature, n
Wide Supply Range an internal reference (1.182V ±1% for LTC1443 or 1.221V
Single: 2V to 11V
±1% for LTC1444/LTC1445), programmable hysteresis
Dual: ±1V to ±5.5V (LTC1444/LTC1445) and TTL/CMOS output (LTC1443/ n
Input Voltage Range Includes the Negative Supply LTC1445) that sinks and sources current (open-drain n
TTL/CMOS Compatible Outputs output for LTC1444). The reference output can drive a n
Propagation Delay: 12µs (Typ) (10mV Overdrive) bypass capacitor of up to 0.01µF without oscillation. n
No Crowbar Current The comparators operate from a single 2V to 11V supply n
40mA Continuous Source Current or a dual ±1V to ±5.5V supply (LTC1443). Comparator n
Pin Compatible Upgrades for MAX924 (LTC1443) hysteresis is easily programmable using two resistors and n
Low Profile (5mm × 4mm × 0.8mm) DFN Package the HYST pin (LTC1444/LTC1445). Each comparator’s input operates from the negative supply to within 1.3V of
applicaTions
the positive supply. The LTC1443/LTC1445 comparator n output stage can continuously source up to 40mA. By Battery-Powered System Monitoring n eliminating the cross-conducting current that normally Threshold Detectors n happens when the comparator changes logic states, power Window Comparators n supply glitches are eliminated. Oscillator Circuits L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear The LTC1443/LTC1444/LTC1445 are available in the Technology Corporation. All other trademarks are the property of their respective owners. 16-pin SO, PDIP and DFN packages.
Typical applicaTion Reference Settling Test Circuit Reference Settling
V 3 IN 8V V+ 3.4M 5V V+ 1% TO 8V IN A+ 5 5V + 2 OUT VREF 4 IN A– – 2mV/DIV 14 HYST 1.21M R1 1% 10k LTC1445 8 REF OUT + 1.2V 144345 TA02 R2 R3 – 2ms/DIV 2.4M 430Ω V– C1 9 1.0µF 144345 TA01 144345fe 1 Document Outline Features Applications Description Absolute Maximum Ratings Typical Application Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Applications Information Package Description Revision History Typical Application Related Parts
