ISO7220BDRG4

Overview

The ISO7220BDRG4 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 5 Mbps. The device provides an isolation voltage of 2500 Vrms with a common-mode transient immunity (CMTI) of 25 kV/µs. It features two forward channels and zero reverse channels in a unidirectional configuration. Packaged in an 8-SOIC format, it functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• High-speed data transmission capability supporting up to 5 Mbps
• Robust noise immunity with 25 kV/µs common-mode transient rejection
• Capacitive coupling architecture ensuring long-term reliability

Applications

• Industrial process control systems requiring galvanic isolation
• Medical equipment signal interfaces
• Power metering and energy monitoring circuits

Procurement Notes

Verify the specific suffix 'G4' against current manufacturer documentation, as this indicates RoHS compliance and green packaging status. Confirm availability status directly with authorized distributors, as some sources indicate discontinuation or limited stock for this specific variant. Ensure the ordering part number matches the required speed grade (B version for 5 Mbps) rather than lower-speed alternatives.

Selection Notes

Select this component when bidirectional communication is not required, as it offers only unidirectional channel support. Compare propagation delay specifications against system timing requirements, noting that higher-speed variants may offer different latency characteristics. Evaluate the 8-SOIC package dimensions against PCB layout constraints and ensure thermal dissipation capabilities meet the application's power density needs.

Part Context

This device belongs to the ISO722x family of general-purpose digital isolators designed for robust signal isolation in noisy environments. The 'B' designation typically denotes the 5 Mbps speed grade, distinguishing it from the 'A' series which offers lower data rates. The 'G4' suffix confirms adherence to specific environmental and lead-free manufacturing standards defined by the manufacturer.

Replacement Considerations

Publicly documented substitutes include the ISO7220BDR and ISO7220BDG4. Verify fit, form, and function compatibility before substitution, particularly regarding pinout alignment and electrical parameter equivalence.