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Features
- Ultralow Quiescent Current: 0.3µA Typ
- Reference Output Drives 0.01µF Capacitor
- Adjustable Hysteresis
- Available in 3mm × 3mm × 0.8mm DFN Package
- Wide Supply Range: 2V to 11V
- Input Voltage Range Includes the Negative Supply
- Reference Output Sources Up to 1mA
- TTL/CMOS Compatible Outputs
- 60µs Propagation Delay with 10mV Overdrive
- No Crowbar Current
- 40mA Continuous Source Current
- Pin Compatible with LTC1440, MAX921, MAX931
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The LTC1540 is an ultralow power, single comparator with built-in reference. The comparator’s features include less than 0.6µA supply current over the commercial temperature range, a 1.182V ±2% reference, 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 comparator operates 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 occur when the comparator changes logic states, power supply glitches are eliminated.
The LTC1540 is available in the 8-pin MSOP and SO packages. For space limited applications, the LTC1540 is available in a 3mm × 3mm low profile (0.8mm) dual fine-pitch leadless package (DFN).
Applications
- Battery-Powered System Monitoring
- Threshold Detectors
- Window Comparators
- Oscillator Circuits
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LTC1540
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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.
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Jun 5, 2024
- 24_0004
Epoxy Change from Henkel 8290 to 8290A for MSOP (3)
LTC1540CMS8#PBF
PRODUCTION
LTC1540CMS8#TRPBF
PRODUCTION
LTC1540IMS8#PBF
PRODUCTION
LTC1540IMS8#TRPBF
PRODUCTION
Feb 3, 2020
- 20_0128
Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC
LTC1540CMS8#PBF
PRODUCTION
LTC1540CMS8#TRPBF
PRODUCTION
LTC1540IMS8#PBF
PRODUCTION
LTC1540IMS8#TRPBF
PRODUCTION
Oct 24, 2024
- 24_0246
Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package
LTC1540CS8#PBF
PRODUCTION
LTC1540CS8#TRPBF
PRODUCTION
LTC1540IS8#PBF
PRODUCTION
LTC1540IS8#TRPBF
PRODUCTION
Dec 14, 2023
- 22_0255
Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)
LTC1540CS8#PBF
PRODUCTION
LTC1540CS8#TRPBF
PRODUCTION
Jun 16, 2021
- 21_0026
Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
LTC1540CS8#PBF
PRODUCTION
LTC1540CS8#TRPBF
PRODUCTION
LTC1540IS8#PBF
PRODUCTION
LTC1540IS8#TRPBF
PRODUCTION
Oct 12, 2022
- 22_0255
Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)
LTC1540IS8#PBF
PRODUCTION
LTC1540IS8#TRPBF
PRODUCTION
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Jun 5, 2024
- 24_0004
Epoxy Change from Henkel 8290 to 8290A for MSOP (3)
LTC1540CMS8#PBF
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LTC1540CMS8#TRPBF
PRODUCTION
LTC1540IMS8#PBF
PRODUCTION
LTC1540IMS8#TRPBF
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Feb 3, 2020
- 20_0128
Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC
LTC1540CMS8#PBF
PRODUCTION
LTC1540CMS8#TRPBF
PRODUCTION
LTC1540IMS8#PBF
PRODUCTION
LTC1540IMS8#TRPBF
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Oct 24, 2024
- 24_0246
Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package
LTC1540CS8#PBF
PRODUCTION
LTC1540CS8#TRPBF
PRODUCTION
LTC1540IS8#PBF
PRODUCTION
LTC1540IS8#TRPBF
PRODUCTION
Dec 14, 2023
- 22_0255
Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)
LTC1540CS8#PBF
PRODUCTION
LTC1540CS8#TRPBF
PRODUCTION
Jun 16, 2021
- 21_0026
Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
LTC1540CS8#PBF
PRODUCTION
LTC1540CS8#TRPBF
PRODUCTION
LTC1540IS8#PBF
PRODUCTION
LTC1540IS8#TRPBF
PRODUCTION
Oct 12, 2022
- 22_0255
Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)
LTC1540IS8#PBF
PRODUCTION
LTC1540IS8#TRPBF
PRODUCTION
Software & Part Ecosystem
| Parts | Product Life Cycle | Description | ||
|---|---|---|---|---|
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Dual-Supply Monitors1 |
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RECOMMENDED FOR NEW DESIGNS |
36V Nano-Current Two-Input Voltage Monitor |
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Single-Supply Monitors1 |
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PRODUCTION |
Ultra-Low Power Adjustable Supervisor with Power-Fail Output |
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TimerBlox1 |
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PRODUCTION |
TimerBlox: Resettable, Low Frequency Oscillator |
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Evaluation Kits 1
DC600A
LTC1540CDD | Nano-Power Voltage Comparator with Built In Voltage Reference in DFN Package
Resources
Tools & Simulations 1
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.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Lt Spice
Reference Designs 1
CN0536
Geiger Counter Circuit with Adjustable High Voltage Power Supply
Circuits from the lab
Info:Circuits from the lab
