ISO7220CD

Overview

The ISO7220CD is a dual-channel digital isolator from Texas Instruments utilizing capacitive coupling technology. It provides bidirectional data transmission with two forward channels and zero reverse channels, operating at a signaling rate of 25 Mbps. The device supports a supply voltage range of 2.8 V to 5 V and offers an insulation voltage of 2500 Vrms. Key electrical parameters include a maximum propagation delay of 32 ns, common mode transient immunity of 25 kV/µs, and low pulse-width distortion of 1 ns max. It operates within a temperature range of -40°C to +125°C and is housed in an SOIC-8 package.

Feature Summary

• Capacitive coupling isolation architecture for high-speed signal transmission
• Dual unidirectional channel configuration supporting 25 Mbps data rates
• High common-mode transient immunity ensuring reliable operation in noisy environments

Applications

• Industrial communication interfaces such as RS-485 and CAN bus systems
• Medical equipment requiring galvanic isolation for safety compliance
• Power management circuits involving isolated gate driving applications

Procurement Notes

Verify the specific suffix 'CD' corresponds to the tube packaging variant rather than tape-and-reel options like 'ADR' or 'CDR'. Confirm RoHS compliance status through official manufacturer documentation before integration. Ensure the selected component matches the required thermal performance specifications for the intended operating environment.

Selection Notes

Select this component when a 25 Mbps data rate is required alongside robust noise immunity. The capacitive coupling technology offers superior longevity compared to magnetic alternatives. Consider the SOIC-8 footprint constraints and verify that the 2.8 V to 5 V supply range aligns with the system's power architecture requirements.

Part Context

This part belongs to the ISO722x family of dual-channel digital isolators. It shares the same physical package and basic functionality with variants offering different speed grades, such as the 1 Mbps ISO7220A and the 150 Mbps ISO7220E. The 'C' designation typically indicates the commercial temperature grade and specific speed rating within the product line.

Replacement Considerations

Direct substitutes include other ISO7220 variants with matching pinouts but different speed ratings, such as ISO7220AD or ISO7220ED. Verify that the replacement maintains the 2500 Vrms insulation rating and compatible supply voltage ranges.