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
AEC-Q100 data available for specific packages
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 |
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
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 | |||
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 Now • Request Samples | ||||||
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
LTspice
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Models for the following parts are available in LTspice:
LT6108-1
LT6108-2
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
