LTC1440
PRODUCTIONUltralow Power Single/Dual Comparator with Reference
- Part Models
- 14
- 1ku List Price
- Starting From $1.79
Part Details
- Ultralow Quiescent Current: 2.1µA Typ
- Reference Output Drives 0.01µF Capacitor
- Adjustable Hysteresis
- Wide Supply Range:
- Single: 2V to 11V
- Dual: ±1V to ±5.5V
- Input Voltage Range Includes the Negative Supply
- TTL/CMOS Compatible Outputs
- 12µs Propagation Delay with 10mV Overdrive
- No Crowbar Current
- 40mA Continuous Source Current
- Pin Compatible Upgrades for MAX921/931
- 3mm × 3mm × 0.75mm DFN Package
The LTC1440 is an ultralow power comparator with a built-in voltage reference. The comparator features less than 4.0µA supply current over temperature. The internal reference is 1.182V with ±1% accuracy. The LTC1440 has programmable hysteresis 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. Comparator hysteresis is easily programmed by using two resistors and the HYST pin. 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 a 3mm × 3mm × 0.75mm DFN package, as well as 8-pin PDIP and SO-8.
Applications
- Battery-Powered System Monitoring
- Threshold Detectors
- Window Comparators
- Oscillator Circuits
Documentation
Data Sheet 1
Reliability Data 1
Application Note 2
Design Note 6
Technical Articles 4
Spec Notice 1
Product Selector Card 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC1440CDD#PBF | 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC1440CDD#TRPBF | 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC1440CMS8#PBF | 8-Lead MSOP | ||
| LTC1440CMS8#TRPBF | 8-Lead MSOP | ||
| LTC1440CN8#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LTC1440CS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1440CS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1440IDD#PBF | 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC1440IDD#TRPBF | 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC1440IMS8#PBF | 8-Lead MSOP | ||
| LTC1440IMS8#TRPBF | 8-Lead MSOP | ||
| LTC1440IN8#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LTC1440IS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1440IS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 5, 2024 - 24_0004 Epoxy Change from Henkel 8290 to 8290A for MSOP (3) |
||
| LTC1440CMS8#PBF | PRODUCTION | |
| LTC1440CMS8#TRPBF | PRODUCTION | |
| LTC1440IMS8#PBF | PRODUCTION | |
| LTC1440IMS8#TRPBF | PRODUCTION | |
|
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC1440CMS8#PBF | PRODUCTION | |
| LTC1440CMS8#TRPBF | PRODUCTION | |
| LTC1440IMS8#PBF | PRODUCTION | |
| LTC1440IMS8#TRPBF | PRODUCTION | |
|
Oct 8, 2024 - 24_0234 Migrating Bottom Trace Code Marking to Top Side Laser Marking for PDIP Package |
||
| LTC1440CN8#PBF | PRODUCTION | |
| LTC1440IN8#PBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package |
||
| LTC1440CN8#PBF | PRODUCTION | |
| LTC1440IN8#PBF | PRODUCTION | |
|
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG] |
||
| LTC1440CN8#PBF | PRODUCTION | |
| LTC1440IN8#PBF | PRODUCTION | |
|
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| LTC1440CS8#PBF | PRODUCTION | |
| LTC1440CS8#TRPBF | PRODUCTION | |
| LTC1440IS8#PBF | PRODUCTION | |
| LTC1440IS8#TRPBF | PRODUCTION | |
|
Oct 12, 2022 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LTC1440CS8#PBF | PRODUCTION | |
| LTC1440CS8#TRPBF | PRODUCTION | |
| LTC1440IS8#PBF | PRODUCTION | |
| LTC1440IS8#TRPBF | PRODUCTION | |
|
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LTC1440CS8#PBF | PRODUCTION | |
| LTC1440CS8#TRPBF | PRODUCTION | |
| LTC1440IS8#PBF | PRODUCTION | |
| LTC1440IS8#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC1440
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
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