ADUM3474CRSZ-RL7

Overview

The ADUM3474CRSZ-RL7 is a four-channel digital isolator from Analog Devices, utilizing magnetic 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 25 Mb/s. The device features an insulation voltage rating of 2500 Vrms and offers a common-mode transient immunity of 25 kV/µs. Propagation delay is specified at 45 ns, with a pulse width capability of 6 µs. It is housed in a 20-pin SSOP package and functions reliably across an operating temperature range of -40°C to +105°C.

Feature Summary

• Integrates four independent bidirectional channels with internal transformer drivers for compact design
• Provides high-speed digital isolation via magnetic coupling technology
• Ensures robust signal integrity with high common-mode transient immunity

Applications

• Industrial automation control systems requiring galvanic isolation
• Medical equipment needing safe patient isolation barriers
• Power electronics monitoring and gate drive circuits

Procurement Notes

Verify the specific suffix RL7 indicates reel packaging when ordering. Confirm the C variant corresponds to the commercial temperature grade (-40°C to +105°C) required for your application environment. Ensure compatibility with the 20-SSOP footprint during PCB layout review. Cross-reference the manufacturer datasheet for any recent product change notices affecting pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when four isolated channels are necessary within a single package to save board space. The unidirectional channel configuration distinguishes it from bidirectional variants like the ADUM3470 series. Consider the 45 ns propagation delay and 25 Mbps data rate against system timing requirements. The ISOPwr type designation suggests integrated power supply isolation capabilities suitable for complex interface designs.

Part Context

This part belongs to the ADUM347x family of digital isolators, which replaces traditional optocouplers in many applications. The ADUM3474 specifically provides four unidirectional channels, contrasting with the bidirectional ADUM3470. It shares the same SSOP-20 package form factor as other members of the series, facilitating potential design-in flexibility within the same product line.

Replacement Considerations

Direct substitutes include ADUM3470ARSZ-RL7 for bidirectional needs or ADUM3472WCRSZ-RL7 for automotive-grade unidirectional applications. Verify that the replacement maintains the same 2500 Vrms insulation rating and SSOP-20 package dimensions.