DS2756

PRODUCTION

High-Accuracy Battery Fuel Gauge with Programmable Suspend Mode

Provides Key Hardware Components Required to Accurately Estimate Remaining Capacity by Integrating Low-Power Precision Measurements of Temperature, Voltage, Current, Current Accumulation, and Nonvolatile Data Storage

Data Sheet (Rev. 3) Product Selection Table
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Overview

  • Programmable Suspend Mode
  • Accurate Current Accumulation
    • 2% ±4µV over ±64mV Input Range
    • 2% ±200µA over ±3.2A with 20mΩ Sense
  • Current Measurement
    • 9-Bit Snapshot Measurement
    • 12-Bit Average Updated Every 88ms
    • 15-Bit Average Updated Every 2.8s
  • Voltage Measurement
    • 9-Bit Snapshot Measurement
    • 10-Bit Average Updated Every 4ms
  • Temperature Measurement
    • 10-Bit with 0.125°C Resolution
  • Snapshot mode allows instantaneous power measurement
  • Host Alerted When Accumulated Current or Temperature Exceeds Programmable Limits
  • 96 Bytes of Lockable EEPROM
  • 8 Bytes of General-Purpose SRAM
  • Dallas 1-Wire Interface with Unique 64-Bit Address and Standard or Overdrive Timing
  • 3mm Dimension of 8-Pin TSSOP Package Allows Mounting on Side of Thin Prismatic Li+ and Li+/Polymer Cells
DS2756
High-Accuracy Battery Fuel Gauge with Programmable Suspend Mode
DS2756 high-precision battery fuel gauge is a data-acquisition and information-storage device tailored for cost-sensitive and space-constrained 1-cell Li+/polymer battery-pack application | Typical Operating Circuit
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Documentation

Data Sheet 1

Technical Articles 4

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Software Resources

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Tools & Simulations

Software Development 1

Evaluation Kits

DS2756EVKIT

Evaluation Kit for the DS2756

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Features and Benefits

  • Demonstrates the capabilities of the DS2756 High Accuracy Battery Fuel Gauge, including:
    • Programmable Suspend Mode
    • Temperature measurement
    • Voltage measurement
    • Current measurement
    • Current and Voltage Snapshot Mode
    • Current accumulation
    • Temperature and Accumulated Current Alarms
    • Information storage
    • Identification
  • Interfaces to the USB port of a PC running Windows XP® or older

Product Details

The DS2756 evaluation kit (EV kit) makes performance evaluation, software development, and prototyping with the DS2756 High Accuracy Battery Fuel Gauge easy. The evaluation board interfaces to a PC through a DS9123O USB Adapter and RJ-11 cable connection.

The DS2756 EV kit evaluation software gives the user complete control of all functions of the DS2756. Separate control tabs allow the user access to all EEPROM and RAM memory locations, all control registers, and real-time updates of all monitored parameters. The software also incorporates a data logging feature to monitor a cell over time and fuel gauging algorithms to improve remaining capacity calculations based on specific cell characteristics.

The evaluation board circuit is designed to provide the DS2756 with accurate parameter measurements and protect the DS2756 from ESD damage. Kit demonstration boards will vary as they are improved upon over time. For information on the demonstration board circuits refer to our website at www.maximintegrated.com.
DS2756EVKIT
Evaluation Kit for the DS2756

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