ADUM7440ARQZ-RL7

Overview

The ADUM7440ARQZ-RL7 is a four-channel digital isolator utilizing Analog Devices iCoupler technology, which integrates high-speed CMOS circuitry with monolithic air-core transformer coils. It provides bidirectional signal isolation with a rated insulation voltage of 1000 Vrms and a common-mode transient immunity of 15 kV/µs. The device operates on supply voltages between 3.0 V and 5.5 V, supporting data rates up to 1 Mbps. Key electrical parameters include a propagation delay of 75 ns, typical rise/fall times of 2.8 ns, and a pulse width distortion of 250 ns. It functions within an operating temperature range of -40°C to +105°C.

Feature Summary

• Integrates four independent bidirectional channels using magnetic coupling via monolithic air-core transformers for robust signal transmission across isolation barriers.
• Features input glitch filtering to suppress external noise interference and ensures default logic-high output states when input power is absent.
• Delivers low power consumption relative to comparable isolators while maintaining high common-mode transient immunity for reliable operation in noisy environments.

Applications

• Industrial automation systems requiring galvanic isolation for sensor interfaces
• Medical equipment needing certified basic isolation for patient-connected circuits
• Power electronics control loops involving high-voltage switching signals

Procurement Notes

Verify the specific suffix RL7 corresponds to the required reel packaging configuration before ordering. Confirm that the QSOP-16 package dimensions align with your PCB footprint requirements. Ensure the 1 Mbps data rate meets your system's timing constraints. Check for RoHS compliance documentation if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component when four isolated bidirectional channels are required within a compact QSOP-16 footprint. It is suitable for applications demanding 1000 Vrms isolation with moderate data speeds. Consider alternatives from the ADuM744x family if higher data rates or unidirectional configurations are needed. Verify that the 3.0 V to 5.5 V supply range matches your system's voltage rails.

Part Context

This part belongs to the ADuM744x series of four-channel digital isolators. The series leverages iCoupler technology to replace traditional optocouplers, offering superior performance in speed, power, and size. The ADUM7440 variant specifically provides bidirectional channels, distinguishing it from unidirectional models like the ADUM7441. All variants share similar physical packaging and core isolation characteristics.

Replacement Considerations

Direct substitutes within the same series include ADUM7440ARQZ (non-reel) and ADUM7441ARQZ for unidirectional needs. Cross-series replacements may require verification of channel directionality and data rate compatibility. Ensure any substitute maintains the 1000 Vrms isolation rating and QSOP-16 package form factor.