DS2740U

Overview

The DS2740U is a high-precision coulomb counter designed for battery management applications. It operates on a supply voltage ranging from 2.7 V to 5.5 V and utilizes an 8-pin UMAX package. The device features 15-bit bidirectional current measurement with a dynamic range of ±51.2 mV, supporting external sense resistors of 10 mΩ or 20 mΩ. It employs a Dallas 1-Wire interface with a unique 64-bit address for system communication. Operating temperatures span from -40°C to +85°C, with a maximum active current of 65 µA and a sleep current of 1 µA.

Feature Summary

• Provides high-precision 15-bit bidirectional current measurement capability for accurate state-of-charge estimation.
• Integrates a Dallas 1-Wire interface allowing read/write access to status and measurement registers via a single data line.
• Features a unique factory-programmed 64-bit network address enabling individual addressing in multi-battery systems.
• Supports analog input filtering to extend dynamic range for pulsed load applications.

Applications

• Cellular telephones
• Digital cameras
• Portable entertainment devices
• Smart battery packs and chargers

Procurement Notes

Verify component authenticity through authorized Analog Devices channels due to limited availability. Confirm the specific suffix indicates the UMAX package variant. Check for RoHS compliance documentation as required by regional regulations. Ensure the supplier provides valid traceability records for quality assurance purposes.

Selection Notes

Select this model when 15-bit resolution is required for precise capacity monitoring. Choose based on the need for bidirectional current sensing and low power consumption. Consider the 1-Wire interface compatibility with the host microcontroller. Evaluate the thermal requirements against the specified operating temperature range.

Part Context

This component belongs to the DS2740 series of high-precision coulomb counters manufactured by Analog Devices under the Maxim Integrated brand. It is categorized under battery management integrated circuits within the PMIC family. The device is engineered to work with FuelPack algorithms for comprehensive battery fuel gauging solutions.

Replacement Considerations

The DS2740BU+ serves as a functional alternative offering 13-bit resolution. Verify pinout compatibility and software register mapping before substitution. Confirm that the reduced resolution meets the application's accuracy requirements.