LT6118 - Current Sense Amplifier, Reference and Comparator with POR

Features

  • Current Sense Amplifier
    – Fast Step Response: 500ns
    – Low Offset Voltage: 200μV Maximum
    – Low Gain Error: 0.2% Maximum
  • Internal 400mV Precision Reference
  • Internal Comparator
    – Power-On Reset Capability
    – Fast Response Time: 500ns
  •    – Total Threshold Error: ±1.25% Maximum
  • Wide Supply Range: 2.7V to 60V
  • Supply Current: 450μA
  • Specified for –40°C to 125°C Temperature Range
  • Available in 8-Lead MSOP and 8-Lead (2mm × 3mm) DFN Packages

Typical Application

LT6118 Typical Application
LT6118 Typical Application

Description

The LT®6118 is a complete high side current sense device that incorporates a precision current sense amplifier, an integrated voltage reference and a latching comparator. The comparator latch functionality can be enabled or disabled and the comparator can be configured to reset upon power-on. The input and the open-drain output of the comparator are independent from the current sense amplifier. The comparator trip point and amplifier gain are configured with external resistors.

The overall propagation delay of the LT6118 is typically only 1.4μs, allowing for quick reaction to overcurrent conditions. The 1MHz bandwidth allows the LT6118 to be used for error detection in critical applications such as motor control. The high threshold accuracy of the comparator, combined with the ability to latch the comparator, ensures the LT6118 can capture high speed events.

The LT6118 is fully specified for operation from –40°C to 125°C, making it suitable for industrial and automotive applications. The LT6118 is available in the small 8-lead MSOP and 8-lead DFN packages.

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
LT6118HDCB#PBF 2x3 DFN-8 DCB H 05-08-1718 Yes
LT6118HDCB#TRMPBF 2x3 DFN-8 DCB H 05-08-1718 Yes
LT6118HDCB#TRPBF 2x3 DFN-8 DCB H 05-08-1718 Yes
LT6118HMS8#PBF MS-8 MS8 H 05-08-1660 Yes
LT6118HMS8#TRPBF MS-8 MS8 H 05-08-1660 Yes
LT6118IDCB#PBF 2x3 DFN-8 DCB I 05-08-1718 Yes
LT6118IDCB#TRMPBF 2x3 DFN-8 DCB I 05-08-1718 Yes
LT6118IDCB#TRPBF 2x3 DFN-8 DCB I 05-08-1718 Yes
LT6118IMS8#PBF MS-8 MS8 I 05-08-1660 Yes
LT6118IMS8#TRPBF MS-8 MS8 I 05-08-1660 Yes


LT6118 Package Drawing
LT6118 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
LT6118HDCB#PBF 2x3 DFN-8 H $2.54 Yes
LT6118HDCB#TRMPBF 2x3 DFN-8 H $2.54 $1.87 Yes
LT6118HDCB#TRPBF 2x3 DFN-8 H $1.82 Yes
LT6118HMS8#PBF MS-8 H $2.48 $1.76 Yes
LT6118HMS8#TRPBF MS-8 H $1.82 Yes
LT6118IDCB#PBF 2x3 DFN-8 I $2.22 Yes
LT6118IDCB#TRMPBF 2x3 DFN-8 I $2.22 $1.69 Yes
LT6118IDCB#TRPBF 2x3 DFN-8 I $1.64 Yes
LT6118IMS8#PBF MS-8 I $2.22 $1.58 Yes
LT6118IMS8#TRPBF MS-8 I $1.64 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.

Part Number Description Price Documentation
DC2193A LT6118 Demo Board | High Side Current Sense Amplifier with Reference and Comparator with POR Capability $50.00
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Click here to view our complete list of demo boards

Applications

  • Overcurrent and Fault Detection
  • Current Shunt Measurement
  • Battery Monitoring
  • Motor Control
  • Automotive Monitoring and Control
  • Industrial Control

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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:
LT6118

Technical Support