MAX17843

PRODUCTION

12-Channel, High-Voltage Smart Sensor Data-Acquisition Interface

Industries leading ASIL D Battery Monitor ASIC

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $9.97

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Overview

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

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.

Applications

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

Part Models: 2
1ku List Price: Starting From $9.97

Documentation

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.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX17843ACB/V+	64-LQFP-10X10X1.4	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX17843ACB/V+T	64-LQFP-10X10X1.4	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Sep 1, 2021 - 2181 ASSEMBLY
		pcn_2181
MAX17843ACB/V+	PRODUCTION
MAX17843ACB/V+T	PRODUCTION
Apr 22, 2021 - 2145 ASSEMBLY
		pcn_2145
MAX17843ACB/V+	PRODUCTION
MAX17843ACB/V+T	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Interface Transceivers & Isolators 1
MAX17841B	PRODUCTION	Automotive SPI Communication Interface (ASCI)

Tools & Simulations

Software Development 1

MAX17843 EVKIT Software, 1.0.7

Evaluation Kits

Evaluation Kit for the MAX17843

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Features and Benefits

Battery-Cell String Emulation
UART Interface
Windows XP^®-, Windows Vista^®-, Windows^® 7-, and Windows 10-Compatible Software
Proven PCB Layout
Fully Assembled and Tested

Product Details

The MAX17843 evaluation kit (EV kit) demonstrates the capabilities of the MAX17843 12-channel, high-voltage smart sensor data-acquisition interface IC. Vertical headers (P2, P3, P5, and P6) allow for the connection of multiple EV kits, supporting up to a 32-device (max) daisy-chain configuration.

Applications

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

Resources

MAX17843EVKIT ODB File - Design Files
10/26/2023

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