Current Monitor and Accumulator with Integrated Sense Resistor

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.

Through its I²C interface, the DS2741 gives the host system access to current measurement and accumulation registers. The 7-bit slave address is factory programmable, allowing up to 128 devices to be individually addressed by the host system.

Applications

* Battery Monitor/Rechargers * Cell Phones * PDAs

* 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 Factory-Programmable 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)