DESCRIPTION

The DS2751 multichemistry battery fuel gauge is a data-acquisition and information-storage device tailored for cost-sensitive and space-constrained 1-cell Li+/polymer or 3-cell Ni battery-pack applications. The DS2751 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

■ Available in Two Configurations

    - Internal 25mΩ Sense Resistor

    - External User-Selectable Sense Resistor

■ Current Measurement

    - 12-Bit Bidirectional Measurement

    - Internal Sense Resistor Configuration: 0.625mA LSB and ±1.9A Dynamic Range

    - External Sense Resistor Configuration: 15.625V LSB and ±64mV Dynamic Range

■ Current Accumulation

    - Internal Sense Resistor: 0.25mAhr LSB

    - External Sense Resistor: 6.25μVhr LSB

■ Voltage Measurement with 4.88mV Resolution

■ Temperature Measurement Using Integrated Sensor with 0.125°C Resolution

■ 32 Bytes of Lockable EEPROM

■ 16 Bytes of General-Purpose SRAM

■ Dallas 1-Wire® Interface with Unique 64-Bit Device Address

■ Supports 1-Cell Li+/Polymer or 3-Cell Ni Battery Packs

■ 3mm Dimension of 8-Pin TSSOP Package Allows Mounting on Side of Thin Li+ and Li+/Polymer Cells (Lead Free available)

■ Low Power Consumption:

    - Active Current: 60μA (typ), 90μA (max)

    - Sleep Current: 1μA (typ), 2μA (max)