Lithium Ion Battery Safety Monitor

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Design News 2011 Golden Mousetrap Awards

ADI's AD8280 won the power management sub-category for the development of a new chip that monitors the voltage and temperature of lithium-ion battery stacks in hybrid and electric vehicles.

Product Details

The AD8280 is a hardware-only safety monitor for Lithium Ion battery stacks. The part has inputs to monitor six battery cells and two temperature sensors (either NTC or PTC thermistors). The part is designed to be daisy chained with additional AD8280’s to monitor a stack of significantly more than six cells, but without the need for numerous isolators. Its output can be configured for independent or shared alarm state.

The part functions independently from a primary monitor, such as the AD7280, containing its own reference and LDO, both of which are powered completely from the battery cell stack. The reference, in conjunction with external resistor dividers, is used to establish trip points for the over/under-voltages. Each cell channel contains programmable de-glitching (D/G) circuitry to avoid alarming from transient input levels.

The AD8280 also has two digital pins that can be used to select various combinations of the inputs in the case where there are less than six cells to be monitored. Most importantly, it has a self-test feature making it suitable for high-reliability applications, such as automotive hybrid electric vehicles. It can function over a temperature range of -40°C to +105°C.


  • Lithium Ion Battery Back-up Monitor
  • Ideally Suited for companion to AD7280 Primary Monitor
  • Lithium Ion Battery Threshold Detection

Product Lifecycle

checked 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


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Product Details

This (UG-175) user guide describes the evaluation boards for the AD8280, which is a complete back-up monitor for lithium ion battery monitoring, integrating multiple voltages, and temperature input channels. Full details of the part, its specifications and its operating parameters are available in the AD8280 data sheet available on-line and should be consulted in conjunction with the (UG-175) user guide when using the evaluation board.

Reference Designs


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CN0235 Circuit Diagram

CN0235 Photo

Reference Materials

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Design Resources

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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.

AD8280 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints



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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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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Evaluation Boards Pricing displayed is based on 1-piece.
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.