MAX17843
PRODUCTION12-Channel, High-Voltage Smart Sensor Data-Acquisition Interface
Industries leading ASIL D Battery Monitor ASIC
- Part Models
- 2
- 1ku List Price
- Starting From $12.62
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
Documentation
Data Sheet 1
Design Note 1
Evaluation Design File 1
Video 1
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-Lead LQFP (10mm x 10mm x 1.4mm) | ||
| MAX17843ACB/V+T | 64-Lead LQFP (10mm x 10mm x 1.4mm) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Interface Transceivers 1 | ||
| MAX17841B | PRODUCTION | Automotive SPI Communication Interface (ASCI) |
Tools & Simulations
Software Development 1
Evaluation Kits
Evaluation Kit for the MAX17843