MAX17854
RECOMMENDED FOR NEW DESIGNS14-Channel, High-Voltage Data-Acquisition System
Fastest Acquisition, Highest ASIL Level, Best Accuracy in Full Temperature Range and Highest Balancing Current
- Part Models
- 2
- 1ku List Price
- Starting From $8.00
Overview
- 65V Operating Voltage
- Ultra-Low Power Operation
- Shutdown Mode: 2µA
- Redundant ADC and Comparator (COMP) Acquisitions
- Simultaneous Cell and Bus-Bar Voltage Acquisitions
- 14 Cell-Voltage Measurement Channels
- 2.2mV Accuracy (-40°C to +125°C)
- 1.8mV Accuracy (+5°C to +65°C)
- 14 Cell-Balancing Switches
- >300mA Software-Programmable Balancing Current
- Optimized Driving and Parking Balancing Modes
- Automated Balancing with Individual Cell Timers
- Automated Balancing by Cell Voltage
- Emergency Discharge Mode
- Six Configurable Auxiliary Inputs for Temperature, Voltage, or GPIO
- Integrated Die Temperature Measurement
- Automatic Thermal Protection
- Individually Configurable Safety Alerts
- Overvoltage, Undertemperature Faults
- Undervoltage, Overtemperature Faults
- 1-Cell Mismatch Alert
- Support ASIL D Requirements for Cell Voltage, Temperature, Communication
- UART, Dual UART Interface
- Battery-Management UART Protocol
- Daisy-Chain up to 32 Devices
- Capacitive Communication-Port Isolation
- Up to 2Mbps Baud Rate (Auto-Detect)
- 1.5μs Propagation Delay per Device
- Packet-Error Checking (PEC)
- I2C Master
- Configurable Hardware-Alert Interfaces
- 32-Bit Unique Device ID
- AEC-Q100 Grade 1
- Temperature Range -40°C to +125°C
The MAX17854 is a flexible data-acquisition system for the management of high-voltage and low-voltage battery modules. The system can measure 14 cell voltages and a combination of six temperatures or system voltage measurements with fully redundant measurement engines in 162µs, or perform all inputs solely with the ADC measurement engine in 99µs. There are 14 internal balancing switches rated for >300mA for cell-balancing current, each supporting extensive built-in diagnostics. Up to 32 devices can be daisy-chained to manage 448 cells and monitor 192 temperatures.
Cell and bus-bar voltages ranging from -2.5V to +5V are measured differentially over a 65V common-mode range, with a typical accuracy of 100µV. If oversampling is enabled, up to 128 measurements per channel can be averaged internally with 14-bit resolution and combined with digital post-processing IIR filtering for increased noise immunity. The system can shut itself down in the event of a thermal overload by measuring its own die temperature.
The system uses Analog Devices' battery-management UART protocol for robust communications and supports an I2C master interface for external device control, and is optimized to support a reduced feature set of internal diagnostics and rapid-alert communication through both embedded communication and hardware-alert interfaces to support ASIL D and FMEA requirements.
Applications
- Battery-Backup Systems (UPS)
- Battery-Powered Tools
- Electric Bikes
- Electric Vehicles (EVs)
- High-Voltage Battery Stacks
- Hybrid Electric Vehicles (HEVs)
- Super-Cap Systems
Documentation
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 |
|---|---|---|---|
| MAX17854ACB/V+ | LQFP | ||
| MAX17854ACB/V+T | LQFP |
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 |
|---|---|---|
| Battery Monitors & Fuel Gauges 4 | ||
| MAX17823B | PRODUCTION | 12-Channel High-Voltage Data Acquisition System |
| MAX17843 | PRODUCTION | 12-Channel, High-Voltage Smart Sensor Data-Acquisition Interface |
| MAX17853 | PRODUCTION | 14-Channel High-Voltage Data-Acquisition System |
| MAX17852 | PRODUCTION | 14-Channel High-Voltage, ASIL D, Data-Acquisition System with Integrated Current-Sense Amplifier |
Tools & Simulations
Software Development 1
Evaluation Kits
Evaluation Kit for the MAX17854