LT1720
Dual, 4.5ns, Single Supply 3V/5V Comparators with Rail-to-Rail Outputs
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Features
- UltraFast:
- 4.5ns at 20mV Overdrive
- 7ns at 5mV Overdrive
- Low Power: 4mA per Comparator
- Optimized for 3V and 5V Operation
- Pinout Optimized for High Speed Ease of Use
- Input Voltage Range Extends 100mV Below Negative Rail
- TTL/CMOS Compatible Rail-to-Rail Outputs
- Internal Hysteresis with Specified Limits
- Low Dynamic Current Drain; 15µA/(V-MHz), Dominated by Load In Most Circuits
- Tiny 3mm × 3mm × 0.75mm DFN Package (LT1720)
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The LT1720/LT1721 are UltraFast™ dual/quad comparators optimized for single supply operation, with a supply voltage range of 2.7V to 6V. The input voltage range extends from 100mV below ground to 1.2V below the supply voltage. Internal hysteresis makes the LT1720/LT1721 easy to use even with slow moving input signals. The rail-to-rail outputs directly interface to TTL and CMOS. Alternatively, the symmetric output drive can be harnessed for analog applications or for easy translation to other single supply logic levels.
The LT1720 is available in three 8-pin packages; three pins per comparator plus power and ground. In addition to SO and MSOP packages, a 3mm × 3mm low profile (0.8mm) dual fine pitch leadless package (DFN) is available for space limited applications. The LT1721 is available in the 16-pin SSOP and S packages.
The pinouts of the LT1720/LT1721 minimize parasitic effects by placing the most sensitive inputs (inverting) away from the outputs, shielded by the power rails. The LT1720/LT1721 are ideal for systems where small size and low power are paramount.
Applications
- High Speed Differential Line Receiver
- Crystal Oscillator Circuits
- Window Comparators
- Threshold Detectors/Discriminators
- Pulse Stretchers
- Zero-Crossing Detectors
- High Speed Sampling Circuits
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LT1720
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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.
- LT1720CDD#PBF
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8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)
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8-Lead MSOP
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8-Lead SOIC (Narrow 0.15 Inch)
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8-Lead MSOP
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Product Lifecycle
PCN
Feb 3, 2020
- 20_0128
Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC
LT1720CMS8#PBF
PRODUCTION
LT1720CMS8#TRPBF
PRODUCTION
LT1720IMS8#PBF
PRODUCTION
LT1720IMS8#TRPBF
PRODUCTION
Oct 12, 2022
- 22_0254
Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)
LT1720CS8#PBF
PRODUCTION
LT1720CS8#TRPBF
PRODUCTION
LT1720IS8#PBF
PRODUCTION
LT1720IS8#TRPBF
PRODUCTION
Jun 11, 2021
- 21_0060
Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
LT1720CS8#PBF
PRODUCTION
LT1720CS8#TRPBF
PRODUCTION
LT1720IS8#PBF
PRODUCTION
LT1720IS8#TRPBF
PRODUCTION
Jun 5, 2024
- 24_0003
Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
LT1720IMS8#PBF
PRODUCTION
LT1720IMS8#TRPBF
PRODUCTION
Filter by Model
Part Models
Product Lifecycle
PCN
Feb 3, 2020
- 20_0128
Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC
LT1720CMS8#PBF
PRODUCTION
LT1720CMS8#TRPBF
PRODUCTION
LT1720IMS8#PBF
PRODUCTION
LT1720IMS8#TRPBF
PRODUCTION
Oct 12, 2022
- 22_0254
Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)
LT1720CS8#PBF
PRODUCTION
LT1720CS8#TRPBF
PRODUCTION
LT1720IS8#PBF
PRODUCTION
LT1720IS8#TRPBF
PRODUCTION
Jun 11, 2021
- 21_0060
Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
LT1720CS8#PBF
PRODUCTION
LT1720CS8#TRPBF
PRODUCTION
LT1720IS8#PBF
PRODUCTION
LT1720IS8#TRPBF
PRODUCTION
Jun 5, 2024
- 24_0003
Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
LT1720IMS8#PBF
PRODUCTION
LT1720IMS8#TRPBF
PRODUCTION
Software & Part Ecosystem
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
