GENERAL DESCRIPTION

The 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 applications. The DS2756 provides the key hardware components required to accurately estimate remaining capacity by integrating low-power, precision measurements of temperature, voltage, current, and current accumulation, as well as nonvolatile (NV) data storage, into the small footprint of a 3.0mm x 4.4mm 8-pin TSSOP package.

FEATURES

■ Programmable Suspend Mode

■ Accurate Current Accumulation

    - 2 ±4μV over ±64mV Input Range

    - 2 ±200μA over ±3.2A with 20m 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