LTC1540
PRODUCTIONNanopower Comparator with Reference
- Part Models
- 12
- 1ku List Price
- Starting From $2.35
Part Details
- 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
Documentation
Data Sheet 1
Reliability Data 1
User Guide 1
Design Note 1
Technical Articles 3
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 |
|---|---|---|---|
| LTC1540CDD#PBF | 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC1540CDD#TRPBF | 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC1540CMS8#PBF | 8-Lead MSOP | ||
| LTC1540CMS8#TRPBF | 8-Lead MSOP | ||
| LTC1540CS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1540CS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1540IDD#PBF | 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC1540IDD#TRPBF | 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC1540IMS8#PBF | 8-Lead MSOP | ||
| LTC1540IMS8#TRPBF | 8-Lead MSOP | ||
| LTC1540IS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1540IS8#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) |
||
| 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 | |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Dual-Supply Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
| Single-Supply Monitors 1 | ||
| LTC2934 | PRODUCTION | Ultra-Low Power Adjustable Supervisor with Power-Fail Output |
| TimerBlox 1 | ||
| LTC6991 | PRODUCTION | TimerBlox: Resettable, Low Frequency Oscillator |
Tools & Simulations
LTspice 1
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.
Evaluation Kits
LTC1540CDD | Nano-Power Voltage Comparator with Built In Voltage Reference in DFN Package
Resources
Reference Designs
Geiger Counter Circuit with Adjustable High Voltage Power Supply