LTC2946HDE

Overview

The LTC2946HDE is a single-phase energy monitor IC manufactured by Analog Devices Inc. It operates within a supply voltage range of 2.7 V to 100 V and features an I2C interface for communication. The device measures current, voltage, power, charge, and energy with a measurement error of 0.5%. It draws 900 µA of supply current and functions across a temperature range of -40°C to 125°C. The component is housed in a 16-DFN (4x3 mm) surface-mount package.

Feature Summary

• Rail-to-rail system monitoring capability for comprehensive electrical parameter tracking
• Integrated shunt regulator designed for power supplies exceeding 100 V
• Supports bidirectional power monitoring with dedicated energy and charge tracking in the forward path

Applications

• -48V systems using low side sensing with 1.5kHz I2C interface
• Wide range negative power, charge, and energy monitoring from -4V to -500V
• Bidirectional power monitoring applications requiring forward path energy and charge metrics

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and interface specifications. Confirm RoHS compliance status and material declaration details prior to integration. Ensure the selected variant matches the required operating temperature range and supply voltage constraints for the target application environment.

Selection Notes

Select this component when rail-to-rail monitoring of current, voltage, power, charge, and energy is required within a 2.7 V to 100 V range. The integrated shunt regulator supports applications with supplies above 100 V. Consider the 16-DFN package for surface-mount implementations requiring compact footprints.

Part Context

The LTC2946 series comprises rail-to-rail system monitors capable of measuring multiple electrical parameters via an I2C interface. The HDE variant specifically utilizes a 16-pin DFN EP package. This family includes variants optimized for different supply ranges and interface speeds, supporting both positive and negative power monitoring scenarios.

Replacement Considerations

LTC2946IDE#PBF shares the same functional characteristics but utilizes a 16-MSOP package instead of the DFN form factor.