LTC4310IDD-2#PBF

Overview

The LTC4310IDD-2#PBF is a hot-swappable I²C isolator manufactured by Analog Devices Inc. It provides bidirectional I²C communications between two buses with isolated grounds. The device operates within an input voltage range of 2.5 V to 5.5 V and supports data rates up to 400 kb/s. Key electrical parameters include an insulation voltage of 1500 Vrms, a propagation delay of 170 ns, and a quiescent current of 6.5 mA. It functions across a temperature range of -40°C to +85°C and is housed in a 10-lead DFN package measuring 3mm x 3mm with an exposed pad.

Feature Summary

• Provides bidirectional I²C communication between isolated ground domains
• Supports hot-swap insertion without bus disruption
• Utilizes capacitive coupling for signal isolation

Applications

• Isolating I²C buses in mixed-voltage systems
• Protecting controllers during hot-swap operations
• Industrial instrumentation interface isolation

Procurement Notes

Verify the specific suffix and package variant against the official Analog Devices datasheet to ensure compatibility with design requirements. Confirm RoHS compliance status and lead-free specifications directly from the manufacturer's documentation before procurement. Check for any recent lifecycle changes or obsolescence notices on the official product page.

Selection Notes

Select this component when bidirectional I²C isolation is required with hot-swap capability. Ensure the system voltage falls within the 2.5 V to 5.5 V operating range. Verify that the 1500 Vrms isolation rating meets the safety requirements of the application. Consider the 10-lead DFN package constraints for PCB layout and thermal management.

Part Context

This part belongs to the LTC4310 series of digital isolators designed specifically for I²C interfaces. It addresses the need for robust isolation in systems where buses must be connected or disconnected while powered. The device integrates protection mechanisms to prevent bus contention and damage during hot-plug events.

Replacement Considerations

Consult the Analog Devices website for officially listed alternatives or pin-compatible upgrades. Verify functional equivalence regarding isolation voltage and data rate if substituting with other models.

FAQ

What type of coupling does the LTC4310 use for isolation?

The LTC4310 uses capacitive coupling to transmit signals across the isolation barrier.

Can the LTC4310 handle hot-swap connections?

Yes, the device is designed to support hot-swap insertion without disrupting the I²C bus operation.