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14-Channel, High-Voltage Data-Acquisition System

Fastest Acquisition, Highest ASIL Level, Best Accuracy in Full Temperature Range and Highest Balancing Current

Product Details

Key Features

Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Status Monitor
Battery Type 8-14 cell multi-chemistry
Interface UART
Parameters Measured Temperature
Voltage
End Equipment Pack
Battery Protection Features Over-Temperature
Over/Under Voltage
VSUPPLY (V) (min) 9
VSUPPLY (V) (max) 65
Package/Pins LQFP-CU/64
Oper. Temp. (°C) -40 to +125
Budgetary
Price (See Notes)
0
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Simplified Block Diagram

Technical Docs

Support & Training

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Filtered Search

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Parameters

Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Status Monitor
Battery Type 8-14 cell multi-chemistry
Interface UART
Parameters Measured Temperature
Voltage
End Equipment Pack
Battery Protection Features Over-Temperature
Over/Under Voltage
VSUPPLY (V) (min) 9
VSUPPLY (V) (max) 65
Package/Pins LQFP-CU/64
Oper. Temp. (°C) -40 to +125
Budgetary
Price (See Notes)
0

Key Features

  • 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

Applications/Uses

  • Battery-Backup Systems (UPS)
  • Battery-Powered Tools
  • Electric Bikes
  • Electric Vehicles (EVs)
  • High-Voltage Battery Stacks
  • Hybrid Electric Vehicles (HEVs)
  • Super-Cap Systems

Description

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.

Simplified Block Diagram

MAX17854: Functional Block Diagram MAX17854: Functional Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
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.