DS2741

Current Monitor and Accumulator with Integrated Sense Resistor

High-Side Current Sensing Allows Detection of Downstream Failure and Avoids Ground Disturbance

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Overview

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)

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