DS2740U+

Overview

The DS2740U+ is a high-precision coulomb counter designed for battery management applications. It operates within a supply voltage range of 2.7 V to 5.5 V and supports lithium-ion or nickel-metal hydride battery types. The device features a 1-Wire interface with a unique 64-bit address, enabling communication in standard or overdrive timing modes. It provides 15-bit bidirectional current measurement capability with a dynamic range up to ±2.56 A using a 20 mΩ external sense resistor. The component is housed in an 8-pin uMAX/uSOP package.

Feature Summary

• Integrates a high-precision coulomb counter for accurate state-of-charge estimation
• Supports bidirectional current measurement with extended dynamic range via analog input filters
• Features a unique factory-programmed 64-bit network address for individual device addressing
• Operates with low power consumption suitable for portable electronic devices

Applications

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

Procurement Notes

Verify the specific suffix U+ against official Analog Devices documentation to confirm package type and RoHS compliance status. Confirm availability as distribution channels may indicate limited stock or discontinuation. Ensure the selected variant matches the required 1-Wire interface timing specifications for the target system design.

Selection Notes

Select this component when precise cumulative charge tracking is required for single-cell battery monitoring. The device requires an external sense resistor to define the current measurement range. Consider the 1-Wire interface constraints and the need for host-side algorithms like FuelPack for complete capacity estimation. Verify thermal operating limits for the specific application environment.

Part Context

This part belongs to the DS2740 series of battery management integrated circuits manufactured by Analog Devices Inc./Maxim Integrated. It serves as a specialized power management IC focused on fuel gauging rather than general-purpose sensing. The series is designed to provide detailed current and voltage data for battery health analysis in mobile electronics.

Replacement Considerations

DS2740BU+