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Current Monitor and Accumulator with Integrated Sense Resistor

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

Product Details

Key Features

Simplified Block Diagram

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Key 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 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)

Applications/Uses

  • Battery Monitor/Rechargers
  • Cell Phones
  • PDAs

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.

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.

Simplified Block Diagram

DS2741, a current monitor/accumulator is a complete current-sensing, measuring, and accumulation device | Typical Operating Circuit DS2741, a current monitor/accumulator is a complete current-sensing, measuring, and accumulation device | Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .