LTC2946HDE#PBF

Overview

The LTC2946HDE#PBF is a single-channel rail-to-rail system monitor manufactured by Analog Devices Inc., designed for precise power, charge, and energy measurement. It operates within a common-mode voltage range of 2.7 V to 100 V and supports supply voltages up to 100 V. The device features an input offset voltage of 77 µV and a gain error of 0.4%. It consumes 700 µA of operating current and functions reliably between -40°C and +125°C. Packaged in a 16-lead DFN (4x3 mm) surface-mount format, it provides comprehensive monitoring capabilities without a shutdown feature.

Feature Summary

• Measures current, voltage, power, charge, and energy with high precision
• Supports wide common-mode voltage range from 2.7 V to 100 V
• Includes integrated shunt regulator for supplies exceeding 100 V

Applications

• -48V system power monitoring using low-side sensing
• Bidirectional power monitoring with forward path energy and charge tracking
• Rail-to-rail power, charge, and energy supervision

Procurement Notes

Verify component authenticity through authorized channels due to limited availability status. Confirm RoHS compliance and package integrity upon receipt. Cross-reference the full part number including suffixes to ensure exact electrical specifications match design requirements. Check for recent production changes or material declarations if applicable.

Selection Notes

Select this component when high accuracy is required for systems operating at voltages up to 100 V. The low input offset voltage and tight gain error make it suitable for precision applications. Ensure the DFN package fits the PCB layout constraints and thermal management needs of the target environment.

Part Context

This device belongs to the LTC2946 series of single-channel system monitors. It shares functional similarities with variants like the LTC2946HMS#PBF but differs in packaging. The H-grade designation indicates extended temperature and performance specifications compared to standard industrial grades.

Replacement Considerations

LTC2946HDE-1#PBF offers similar functionality with automotive qualification. LTC2946IDE#PBF provides the same electrical performance in a different DFN variant. Verify pin compatibility and software register settings before substitution.