LTC1540

PRODUCTION

Nanopower Comparator with Reference

Part Models: 12
1ku List Price: Starting From $2.35

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Overview

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

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

Part Models: 12
1ku List Price: Starting From $2.35

Documentation

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
LTC1540CDD#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1540CDD#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1540CMS8#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1540CMS8#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1540CS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1540CS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1540IDD#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1540IDD#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1540IMS8#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1540IMS8#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1540IS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1540IS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0004 Epoxy Change from Henkel 8290 to 8290A for MSOP (3)
		PCN24_0004_Form Material_Report Qualification Results Summary Delta Qualification Matrix
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
		PCN20_0128_Form Material_Report
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
		PCN24_0246_Form Material_Report Marking Comparison Delta Qualification Matrix
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)
		PCN22_0255_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC1540CS8#PBF	PRODUCTION
LTC1540CS8#TRPBF	PRODUCTION
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
		PCN21_0026_Form Material_Report Delta Qualification Matrix
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)
		PCN22_0255_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC1540IS8#PBF	PRODUCTION
LTC1540IS8#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC1540

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.