LT6108
High Side Current Sense Amplifier with Reference and Comparator
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Overview
Features and Benefits
- 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
Product Details
The LT6108 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.
Applications
- Overcurrent and Fault Detection
- Current Shunt Measurement
- Battery Monitoring
- Motor Control
- Automotive Monitoring and Control
- Remote Sensing
- Industrial Control
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (2)
Documentation & Resources
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R515 Reliability Data3/26/2018PDF35 K
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DC1699A - Demo Manual11/7/2011PDF153K
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LT6108/LT6109 - Current Sense System9/23/2011PDF1M
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LTspice: Stepping Parameters1/31/2023
Tools & Simulations
LTspice
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.
Models for the following parts are available in LTspice:
LT6108-1
LT6108-2
Design Resources
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.
PCN-PDN Information
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Sample & Buy
Ordering FAQs
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Buy Now Pricing
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List Pricing
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Lead Times
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.