LT6108 - High Side Current Sense Amplifier with Reference and Comparator

Features

  • Current Sense Amplifier
    – Fast Step Response: 500ns
    – Low Offset Voltage: 125μV Maximum
    – Low Gain Error: 0.2% Maximum
  • Internal 400mV Precision Reference
  • Internal Comparator
    – Fast Response Time: 500ns
    – Total Threshold Error: ±1.25% Maximum
    – Latching or Non-Latching Comparator Option
  • Wide Supply Range: 2.7V to 60V
  • Supply Current: 450μA
  • Low Shutdown Current: 5μA Maximum
  • Specified for –40°C to 125°C Temperature Range
  • Available in 8-Lead MSOP and 8-Lead (2mm × 3mm) DFN Packages
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


Typical Application

LT6108 Typical Application
LT6108 Typical Application

Description

The LT®6108 is a complete high side current sense device that incorporates a precision current sense amplifier, an integrated voltage reference and a comparator. Two versions of the LT6108 are available. The LT6108-1 has a latching comparator and the LT6108-2 has a non-latching comparator. In addition, the current sense amplifier and comparator inputs and outputs are directly accessible. The amplifier gain and comparator trip point are configured by external resistors. The open-drain comparator output allows for easy interface to other system components.

The overall propagation delay of the LT6108 is typically only 1.4μs, allowing for quick reaction to overcurrent conditions. The 1MHz bandwidth allows the LT6108 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 LT6108 can capture high speed events.

The LT6108 is fully specified for operation from –40°C to 125°C, making it suitable for industrial and automotive applications. The LT6108 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
LT6108AHMS8-1#PBF MS-8 MS8 H 05-08-1660 Yes
LT6108AHMS8-1#TRPBF MS-8 MS8 H 05-08-1660 Yes
LT6108AHMS8-2#PBF MS-8 MS8 H 05-08-1660 Yes
LT6108AHMS8-2#TRPBF MS-8 MS8 H 05-08-1660 Yes
LT6108AIMS8-1#PBF MS-8 MS8 I 05-08-1660 Yes
LT6108AIMS8-1#TRPBF MS-8 MS8 I 05-08-1660 Yes
LT6108AIMS8-2#PBF MS-8 MS8 I 05-08-1660 Yes
LT6108AIMS8-2#TRPBF MS-8 MS8 I 05-08-1660 Yes
LT6108HDCB-1#PBF 2x3 DFN-8 DCB H 05-08-1718 Yes
LT6108HDCB-1#TRMPBF 2x3 DFN-8 DCB H 05-08-1718 Yes
LT6108HDCB-1#TRPBF 2x3 DFN-8 DCB H 05-08-1718 Yes
LT6108HDCB-2#PBF 2x3 DFN-8 DCB H 05-08-1718 Yes
LT6108HDCB-2#TRMPBF 2x3 DFN-8 DCB H 05-08-1718 Yes
LT6108HDCB-2#TRPBF 2x3 DFN-8 DCB H 05-08-1718 Yes
LT6108HMS8-1#PBF MS-8 MS8 H 05-08-1660 Yes
LT6108HMS8-1#TRPBF MS-8 MS8 H 05-08-1660 Yes
LT6108HMS8-2#PBF MS-8 MS8 H 05-08-1660 Yes
LT6108HMS8-2#TRPBF MS-8 MS8 H 05-08-1660 Yes
LT6108IDCB-1#PBF 2x3 DFN-8 DCB I 05-08-1718 Yes
LT6108IDCB-1#TRMPBF 2x3 DFN-8 DCB I 05-08-1718 Yes
LT6108IDCB-1#TRPBF 2x3 DFN-8 DCB I 05-08-1718 Yes
LT6108IDCB-2#PBF 2x3 DFN-8 DCB I 05-08-1718 Yes
LT6108IDCB-2#TRMPBF 2x3 DFN-8 DCB I 05-08-1718 Yes
LT6108IDCB-2#TRPBF 2x3 DFN-8 DCB I 05-08-1718 Yes
LT6108IMS8-1#PBF MS-8 MS8 I 05-08-1660 Yes
LT6108IMS8-1#TRPBF MS-8 MS8 I 05-08-1660 Yes
LT6108IMS8-2#PBF MS-8 MS8 I 05-08-1660 Yes
LT6108IMS8-2#TRPBF MS-8 MS8 I 05-08-1660 Yes


LT6108 Package Drawing
LT6108 Package Drawing
LT6108 Package Drawing
LT6108 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
LT6108AHMS8-1#PBF MS-8 H $2.63 $1.89 Yes
LT6108AHMS8-1#TRPBF MS-8 H $1.95 Yes
LT6108AHMS8-2#PBF MS-8 H $2.63 $1.89 Yes
LT6108AHMS8-2#TRPBF MS-8 H $1.95 Yes
LT6108AIMS8-1#PBF MS-8 I $2.35 $1.69 Yes
LT6108AIMS8-1#TRPBF MS-8 I $1.75 Yes
LT6108AIMS8-2#PBF MS-8 I $2.35 $1.69 Yes
LT6108AIMS8-2#TRPBF MS-8 I $1.75 Yes
LT6108HDCB-1#PBF 2x3 DFN-8 H $2.42 Yes
LT6108HDCB-1#TRMPBF 2x3 DFN-8 H $2.42 $1.79 Yes
LT6108HDCB-1#TRPBF 2x3 DFN-8 H $1.74 Yes
LT6108HDCB-2#PBF 2x3 DFN-8 H $2.42 Yes
LT6108HDCB-2#TRMPBF 2x3 DFN-8 H $2.42 $1.79 Yes
LT6108HDCB-2#TRPBF 2x3 DFN-8 H $1.74 Yes
LT6108HMS8-1#PBF MS-8 H $2.36 $1.68 Yes
LT6108HMS8-1#TRPBF MS-8 H $1.74 Yes
LT6108HMS8-2#PBF MS-8 H $2.36 $1.68 Yes
LT6108HMS8-2#TRPBF MS-8 H $1.74 Yes
LT6108IDCB-1#PBF 2x3 DFN-8 I $2.16 Yes
LT6108IDCB-1#TRMPBF 2x3 DFN-8 I $2.16 $1.60 Yes
LT6108IDCB-1#TRPBF 2x3 DFN-8 I $1.55 Yes
LT6108IDCB-2#PBF 2x3 DFN-8 I $2.16 Yes
LT6108IDCB-2#TRMPBF 2x3 DFN-8 I $2.16 $1.60 Yes
LT6108IDCB-2#TRPBF 2x3 DFN-8 I $1.55 Yes
LT6108IMS8-1#PBF MS-8 I $2.10 $1.49 Yes
LT6108IMS8-1#TRPBF MS-8 I $1.55 Yes
LT6108IMS8-2#PBF MS-8 I $2.10 $1.49 Yes
LT6108IMS8-2#TRPBF MS-8 I $1.55 Yes
Buy NowRequest Samples
* 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
DC1699A-A LT6108-1 | High Side Current Sense Amplifier w/ Reference and a Comparator $50.00
DC1699A-B LT6108-2 | High Side Current Sense Amplifier w/ Reference and a Comparator $50.00
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT6108HDCB-1#PBF 2x3 DFN-8 H $2.42 Yes
LT6108HDCB-1#TRMPBF 2x3 DFN-8 H $2.42 $1.79 Yes
LT6108HDCB-1#TRPBF 2x3 DFN-8 H $1.74 Yes
LT6108HDCB-2#PBF 2x3 DFN-8 H $2.42 Yes
LT6108HDCB-2#TRMPBF 2x3 DFN-8 H $2.42 $1.79 Yes
LT6108HDCB-2#TRPBF 2x3 DFN-8 H $1.74 Yes
LT6108IDCB-1#PBF 2x3 DFN-8 I $2.16 Yes
LT6108IDCB-1#TRMPBF 2x3 DFN-8 I $2.16 $1.60 Yes
LT6108IDCB-1#TRPBF 2x3 DFN-8 I $1.55 Yes
LT6108IDCB-2#PBF 2x3 DFN-8 I $2.16 Yes
LT6108IDCB-2#TRMPBF 2x3 DFN-8 I $2.16 $1.60 Yes
LT6108IDCB-2#TRPBF 2x3 DFN-8 I $1.55 Yes
Buy NowRequest Samples
* 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.

Applications

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

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Design Tools

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Models for the following parts are available in LTspice IV:
LT6108-1
LT6108-2

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