ISO7220BD

Overview

The ISO7220BD is a dual-channel digital isolator from Texas Instruments, utilizing capacitive coupling technology. It features a 5 Mbps data rate and supports unidirectional signal transmission with a 2/0 channel configuration. The device operates within a supply voltage range of 3 V to 5.5 V and provides an isolation voltage of 4000 Vrms. It exhibits a maximum propagation delay of 70 ns and a common-mode transient immunity of 25 kV/µs. The component is housed in an 8-SOIC package and functions reliably across an operating temperature range of -40°C to +125°C.

Feature Summary

• Provides high-speed digital isolation with a 5 Mbps signaling rate for reliable data transmission.
• Features robust common-mode transient immunity of 25 kV/µs to maintain signal integrity in noisy environments.
• Offers enhanced safety isolation with a 4000 Vrms insulation rating between input and output channels.

Applications

• Industrial communication interfaces requiring galvanic isolation
• Medical equipment signal conditioning circuits
• Power management systems with isolated feedback loops

Procurement Notes

Verify the specific suffix 'BD' indicates the tube packaging format rather than reel or cut tape options. Confirm that the 4000 Vrms isolation rating aligns with your system's safety requirements, as other variants may differ. Ensure the SOIC-8 footprint matches your PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when a 5 Mbps data rate and unidirectional 2-channel isolation are required. It is suitable for applications needing 4000 Vrms isolation strength. Consider the 8-SOIC package size for space-constrained designs. Verify compatibility with 3 V to 5.5 V logic levels and ensure the 70 ns propagation delay meets timing specifications.

Part Context

The ISO7220BD belongs to the ISO722x family of dual-channel digital isolators manufactured by Texas Instruments. This series utilizes capacitive coupling technology to provide electrical isolation without magnetic components. The family includes variants with different data rates and channel configurations, such as the ISO7220A and ISO7220B, offering flexibility for various interface needs.

Replacement Considerations

The ISO7220ADR serves as a lower-speed alternative with a 1 Mbps data rate. For bidirectional applications, the ISO7221 series offers 1/1 channel configurations. Higher speed requirements may necessitate the ISO7220C or ISO7220M variants. Always verify pinout compatibility and isolation ratings when substituting.