ISO7220MDG4

Overview

The ISO7220MDG4 is a dual-channel digital isolator from Texas Instruments, utilizing capacitive coupling technology for signal transmission. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 150 Mb/s. The device features an 8-pin SOIC package with unidirectional channel polarity (2/0 configuration). Key electrical specifications include a maximum propagation delay of 16 ns, an insulation voltage of 2500 Vrms, and a common-mode transient immunity of 25 kV/µs. It functions reliably across an extended temperature range of -40°C to +125°C.

Feature Summary

• Dual-channel isolation using high-speed capacitive coupling technology
• Supports signaling rates up to 150 Mbps with low pulse-width distortion
• Provides robust noise immunity with high common-mode transient rejection
• Operates on single power supplies ranging from 3 V to 5.5 V

Applications

• Industrial process control systems requiring galvanic isolation
• Medical equipment needing reliable signal separation
• General-purpose interface circuits in noisy environments
• Power management modules for isolated communication

Procurement Notes

Verify the specific suffix 'MDG4' against current manufacturer documentation to confirm pinout and packaging details. Check for End-of-Life status or alternative recommendations as availability may vary. Ensure compliance with RoHS directives and verify moisture sensitivity levels prior to assembly. Confirm that the SOIC-8 package dimensions match your PCB footprint requirements.

Selection Notes

Select this component when dual-channel isolation at speeds up to 150 Mbps is required. It is suitable for applications demanding high common-mode transient immunity and operation over wide temperature ranges. Consider the 8-pin SOIC package constraints and ensure the 3 V to 5.5 V supply range aligns with system power architecture. Evaluate thermal dissipation needs based on the specified power consumption.

Part Context

This part belongs to the ISO722x family of dual-channel digital isolators by Texas Instruments. These devices are designed to replace traditional optocouplers, offering superior performance in speed, size, and reliability. The family includes variants with different data rate options and packaging styles, catering to diverse industrial and commercial interface requirements.

Replacement Considerations

Direct substitutes within the same family include ISO7220ADG4 and ISO7220BDR, which share similar dual-channel architectures but differ in data rates and packaging formats. Verify compatibility regarding propagation delay and insulation ratings before substitution.