General Description

The DS2741 current monitor/accumulator is a complete current-sensing, measuring, and accumulation device tailored for cost-sensitive, battery-powered applications in a small 3mm x 3mm TDFN package. As a result, the DS2741 is a key component in battery-charge control and remaining capacity-estimation applications.

Features

♦ Complete, Low-Cost, Integrated Current-Sensing and Accumulation Solution with Serial Digital Output

♦ On-Board 38mΩ Sense Resistor

♦ Current Measurement: Signed 10-Bit Bidirectional Measurement

    ±2.5A Dynamic Range

    1 Error at +25°C

    2 Error Over Temperature

♦ Current Accumulation:

    0.247mAhr LSB

    ±8.1Ahrs Full-Scale Range

♦ Industry-Standard I2C Interface with FactoryProgrammable Slave Address

♦ 2.5V to 4.5V Single-Supply Operation

♦ Low-Power Consumption:

    Active Current: 60µA (typ)

    Sleep Current: 1µA (typ)

♦ -20°C to +70°C Operating Range

♦ 14-Pin TDFN (3mm x 3mm x 0.8mm)

Applications

    Cell Phones

    PDAs

    Battery Monitor/Rechargers