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Product Detailed Parameters
- Description：DGTL ISOLTR 3KV 2CH GP 8-SOIC
- Series：iCoupler®
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Channels：2
- Voltage - Isolation：3000Vrms
- Rise / Fall Time (Typ)：2.5ns, 2.5ns
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
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Overview
The ADUM1281BRZ is a dual-channel digital isolator from Analog Devices, utilizing iCoupler technology which integrates high-speed CMOS logic with monolithic air-core transformer coils. This component provides electrical isolation between circuits without requiring optical components. It operates within a supply voltage range of 3.0 V to 5.5 V and supports data rates up to 25 Mb/s. The device features a propagation delay of 23 ns typical and offers a common-mode transient immunity of 25 kV/µs. It is housed in an 8-SOIC package and functions across an industrial temperature range of -40°C to +125°C.
Feature Summary
- Integrates high-speed CMOS technology with monolithic air-core transformers for robust signal transmission.
- Provides galvanic isolation with a rated insulation voltage of 3000 Vrms.
- Features tight channel-to-channel matching for precise timing applications.
- Delivers high common-mode transient immunity to maintain signal integrity in noisy environments.
Applications
- Industrial communication protocols such as RS-485 and CAN bus
- Isolated gate drive circuits for power electronics
- Medical equipment requiring strict safety isolation standards
Procurement Notes
Verify the specific suffix 'BRZ' to confirm the RoHS-compliant tube packaging variant. Ensure the design accommodates the 8-SOIC footprint dimensions. Confirm that the required data rate does not exceed the 25 Mb/s specification. Check thermal management requirements for operation at the upper limit of the specified temperature range.
Selection Notes
Select this component when bidirectional or higher speed isolation is not required, as it is unidirectional. Consider the ADUM1281 series if lower channel counts are sufficient. Evaluate the 3000 Vrms isolation barrier against system safety requirements. Compare power consumption figures against battery-operated constraints given the operating current specifications.
Part Context
This part belongs to the ADUM1281 family of dual-channel digital isolators. The series leverages Analog Devices' proprietary iCoupler technology to replace traditional optocouplers. The BRZ suffix indicates a lead-free, halogen-free version packaged in tubes. The family is designed for general-purpose isolation tasks where size and reliability are critical.
Replacement Considerations
Direct replacements include other variants within the ADUM1281 family, such as ADUM1281ARZ or ADUM1281CRZ, depending on the required performance grade. Verify pin compatibility and isolation voltage ratings before substituting with competitors' devices.
FAQ
What is the maximum common-mode transient immunity of the ADUM1281BRZ?
The device provides a minimum common-mode transient immunity of 25 kV/µs.
Does the ADUM1281BRZ support bidirectional signal transmission?
No, the channels are configured as unidirectional isolators.
What is the typical propagation delay for this isolator?
The typical propagation delay is 23 ns.
