LT1394 - 7ns, Low Power, Single Supply, Ground-Sensing Comparator

Features

  • UltraFast™: 7ns
  • Low Power: 6mA
  • Low Offset Voltage: 0.8mV
  • Operates Off Single 5V or Dual ±5V Supplies
  • Input Common Mode Extends to Negative Supply
  • No Minimum Input Slew Rate Requirement
  • Complementary TTL Outputs
  • Inputs Can Exceed Supplies without Phase Reversal
  • Pin Compatible with LT1016, LT1116 and LT1671
  • Output Latch Capability
  • Available in 8-Lead MSOP and SO Packages

Typical Application

LT1394 Typical Application
LT1394 Typical Application

Description

The LT1394 is an UltraFast (7ns) comparator with complementary outputs and latch. The input common mode range extends from 1.5V below the positive supply down to the negative supply rail. Like the LT1016, LT1116 and LT1671, this comparator has complementary outputs designed to interface directly to TTL or CMOS logic. The LT1394 may operate from either a single 5V supply or dual ±5V supplies. Low offset voltage specifications and high gain allow the LT1394 to be used in precision applications. The LT1394 is designed for improved speed and stability for a wide range of operating conditions. The output stage provides active drive in both directions for maximum speed into TTL, CMOS or passive loads with minimal cross-conduction current. Unlike other fast comparators, the LT1394 remains stable even for slow transitions through the active region, which eliminates the need to specify a minimum input slew rate. The LT1394 has an internal, TTL/CMOS compatible latch for retaining data at the outputs. The latch holds data as long as the LATCH pin is held high. Device parameters such as gain, offset and negative power supply current are not significantly affected by variations in negative supply voltage.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LT1394CMS8#PBF MS-8 MS8 C 05-08-1660 Yes
LT1394CMS8#TRPBF MS-8 MS8 C 05-08-1660 Yes
LT1394CS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1394CS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1394IS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LT1394IS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes


LT1394 Package Drawing
LT1394 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT1394CMS8#PBF MS-8 C $3.15 $2.65 Yes
LT1394CMS8#TRPBF MS-8 C $2.71 Yes
LT1394CS8#PBF SO-8 C $2.90 $2.55 Yes
LT1394CS8#TRPBF SO-8 C $2.61 Yes
LT1394IS8#PBF SO-8 I $3.25 $2.80 Yes
LT1394IS8#TRPBF SO-8 I $2.86 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • High Speed A/D Converters
  • Zero-Crossing Detectors
  • Current Sense for Switching Regulators
  • Extended Range V/F Coverters
  • Fast Pulse Height/Width Discriminators
  • High Speed Triggers
  • Line Receivers
  • High Speed Sampling Circuits

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice IV:
LT1394

Technical Support