Features and Benefits

  • 12-Cell Battery-Voltage Measurement for Lithium-Ion, NiMH, or Super-Cap Cells
  • Two Auxiliary Analog Inputs for NTC Thermistor or Absolute Voltage Measurement
  • Die Temperature Measurement and alert
  • High-Accuracy Differential Measurement I/Os
    • ±2mV Accuracy at +25°C and 3.6V
  • Integrated 12-Channel Data-Acquisition System
    • Differential High-Voltage Mux to ADC
    • 14-Bit ADC Resolution with Oversampling
    • 12 Cell Voltages Measured within 142μs
    • Module Voltage Measurement
    • Redundant ADC
  • Battery Fault Detection
    • Overvoltage and Undervoltage Digital Threshold Detection
    • Enhanced Diagnostic Features for Fault Detection to Support ASIL and FMEA
  • 12 Internal Cell-Balancing Switches
    • Support Up to 150mA per Switch
    • Emergency Cell-Discharge Mode
  • Integrated 9V to 65V Input Linear Regulator
  • Integrated Temperature-Compensated, Voltage Reference
  • Robust Differential Daisy-Chain UART Interface
    • Up to 32 Connected ICs in a Single Daisy-Chain
    • Compatible with Direct MCU Connection
    • Standard UART bytes at 2Mb/s (max) Rate
  • Four General-Purpose Digital I/O Lines
  • Built-In Diagnostics to Support ASIL D and FMEA Requirements
  • Ultra-Low-Power Dissipation
    • 2.0mA (typ) Standby-Mode Supply Current
    • 3µA Shutdown Mode Leakage Current
  • -40°C to +125°C Operating Temperature Range (AEC-Q100 Grade 1)
  • 64-Pin, Lead-Free/RoHS-Compliant, 10mm x 10mm LQFP Package

Product Details

The MAX17843 is a programmable, highly integrated, high-voltage, 12-channel battery-monitoring smart data-acquisition interface with extensive features for safety. It is optimized for use with batteries used in automotive systems, hybrid electric battery packs, electric cars, and any system that stacks long series strings of secondary metal batteries. This highly integrated battery sensor incorporates a high-speed differential UART bus for robust daisy-chained serial communication.

The analog front-end combines a 12-channel voltage-measurement data-acquisition system with a high-voltage switch-bank input. All measurements are done differentially across each cell. The full-scale measurement range is from 0 to 5.0V with a usable range of 0.2V to 4.8V. A high-speed successive approximation (SAR) A/D converter is used to digitize the cell voltages at 14-bit resolution with oversampling. All 12 cells can be measured in under 142µs. The MAX17843 uses a 2-scan approach for collecting cell measurements and correcting them for errors. This 2-phase approach yields excellent accuracy over temperature and in the face of extreme noise in the system.

The MAX17843 has two auxiliary analog inputs that can be used to measure external thermistor components. A negative temperature coefficient (NTC) thermistor can be configured with the AUXIN analog inputs to accurately monitor module or battery-cell temperature. A thermal-overload detector disables the MAX17843's linear regulator to protect the IC, and a die-temperature measurement is also available.

Design Solution: Monitor Your Electric Vehicle’s Battery with a Smart Sensor ›


  • 48V Vehicle Battery Modules or Systems
  • Battery Packs
  • Electric Bikes
  • High-Power Battery-Backup Systems
  • High-Voltage Electric Vehicle (EVs)
  • Hybrid Electric Vehicles (HEVs)
  • Power Tools
  • Super-Cap Backup Systems

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Tools & Simulations

Software Development

Product Recommendations

MAX17843 Companion Parts

Recommended Related Parts

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.

PCN-PDN Information

Sample & Buy

Ordering FAQs

See our Ordering FAQs for answers to questions about online orders, payment options and more.


Buy Now Pricing

(**) Displayed Buy Now Price and Price Range is based on small quantity orders.


List Pricing

(*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Lead Times

Please see the latest communication from our CCO regarding lead times.



Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Price Table Help


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.