LTC2946HDE-1#PBF

Overview

The LTC2946HDE-1#PBF is a single-channel 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 with a clock frequency of 1.5 kHz. The device measures current, voltage, power, charge, and energy in rail-to-rail configurations. It includes a shunt regulator for supplies exceeding 100 V. The component is housed in a 16-pin DFN EP package and supports surface mount installation. It functions as a comprehensive system monitor for power management applications.

Feature Summary

• Rail-to-rail system monitoring capability for measuring current, voltage, power, charge, and energy
• Integrated shunt regulator designed for power supplies operating above 100 V
• I2C communication interface supporting 1.5 kHz clock speeds

Applications

• -48V systems using low side sensing for power, charge, and energy monitoring
• Bidirectional power monitoring with energy and charge monitoring in the forward path
• Wide range negative power, charge, and energy monitoring

Procurement Notes

Verify the specific suffix HDE-1 against the target application requirements, as it denotes a distinct variant within the LTC2946 family. Confirm that the 1.5 kHz I2C interface speed aligns with the system bus specifications. Ensure the 16-pin DFN EP package dimensions are compatible with the PCB footprint design. Cross-reference the manufacturer's latest datasheet to confirm the current production status and any recent packaging or material changes documented in product change notices.

Selection Notes

Select this component when a dedicated energy monitor is required for systems operating between 2.7 V and 100 V. The HDE-1 variant is appropriate for applications requiring a 1.5 kHz I2C interface speed. Consider the 16-pin DFN EP package for space-constrained surface mount designs. This part is suitable for both positive and negative supply monitoring scenarios, including -48V telecommunications systems. Evaluate the need for the integrated shunt regulator if input voltages may exceed 100 V.

Part Context

The LTC2946 series comprises rail-to-rail system monitors capable of measuring current, voltage, power, charge, and energy. The HDE-1 variant specifically utilizes a 1.5 kHz I2C interface. Other variants in the family include the IDE (10 kHz I2C) and IMS/HMS (MSOP packages). The series supports wide input voltage ranges and includes internal regulation for high-voltage supplies. These devices are designed for precise energy metering in power management circuits.

Replacement Considerations

LTC2946HDE-1#TRPBF offers the same electrical characteristics in a tape-and-reel package instead of tubes.