LTC2946IDE-1#TRPBF

Overview

The LTC2946IDE-1#TRPBF is a rail-to-rail system monitor designed for measuring current, voltage, power, charge, and energy. It operates within a supply voltage range of 2.7V to 100V and includes an integrated shunt regulator for applications involving supplies exceeding 100V. This specific variant features a 1.5kHz I2C interface and utilizes low-side sensing architecture, making it suitable for monitoring in -48V systems. The device is packaged in a 16-pin DFN EP format and supplied in tape and reel configuration.

Feature Summary

• Rail-to-rail system monitoring capability for comprehensive electrical parameter measurement
• Integrated shunt regulator supporting power supplies above 100V
• Low-side sensing architecture optimized for negative voltage system monitoring

Applications

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

Procurement Notes

Verify that the ordering suffix #TRPBF corresponds to the tape and reel packaging format rather than tube packaging. Confirm the specific temperature grade associated with the 'I' suffix matches the required operational environment. Ensure the 1.5kHz I2C interface speed requirement aligns with the system bus specifications before finalizing procurement.

Selection Notes

Select this component when low-side sensing is required for negative voltage rails, such as in -48V telecommunications or industrial systems. The 1.5kHz I2C interface offers a slower but potentially more robust communication option compared to higher-speed variants. The inclusion of a shunt regulator makes it suitable for high-voltage inputs exceeding 100V without external level shifting components.

Part Context

This part belongs to the LTC2946 family of single-phase energy monitors manufactured by Analog Devices Inc. The family provides rail-to-rail monitoring for current, voltage, power, charge, and energy. Variants differ primarily in package type (DFN vs MSOP), temperature grade, and I2C interface speed, allowing selection based on physical space and communication requirements.

Replacement Considerations

LTC2946IDE#TRPBF: Identical function with standard I2C interface speed instead of 1.5kHz.

FAQ

What is the primary sensing configuration for the LTC2946IDE-1?

It utilizes a low-side sensing architecture, which is specifically documented for use in -48V systems.

Does the LTC2946IDE-1 support high-voltage inputs?

Yes, it includes an integrated shunt regulator designed for power supplies above 100V.