ADuM5401, ADuM5402, ADuM5403 and ADuM5404 (ADuM540x) Digital Isolator with iCoupler and isoPower Tech - Analog Devices

Analog Devices (ADI) has introduced the ADuM540x (ADuM5401, ADuM5402, ADuM5403 and ADuM5404) four-channel digital isolator devices that isolate both data and power. ADuM540x digital isolators integrate iCoupler digital isolation technology and isoPower dc-to-dc converter (iCoupler and isoPower are Analog Devices’ proprietary technology).

Analog Devices’s ADuM540x iCoupler Digital Isolators

Applications of ADuM5401, ADuM5402, ADuM5403 and ADuM5404 digital isolators include:

• RS-232/RS-422/RS-485 transceiver
• Industrial field bus isolation
• Power Supply start bias and Gate Drive
• Isolated Sensor Interface
• Industrial PLC

ADuM540x iCoupler Digital Isolators - Functional Diagram

Key features of ADuM5401, ADuM5402, ADuM5403 and ADuM5404 digital isolators:

• isoPower integrated isolated DC/DC converter
• 500mW output power
• Regulated 3V or 5V output
• Quad dc-to-25 Mbps (NRZ) signal isolation channels
• Schmitt Trigger Inputs
• High common-mode transient immunity: > 25 kV/µs
• High temperature operation: 105°C
• Safety and regulatory approvals (pending)
  • UL recognition
    • 2500 V rms for 1 minute per UL 1577
  • CSA component acceptance notice #5A
  • VDE certificate of conformity
    • DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
    • VIORM = 560 V peak
• SOIC 16-lead package with > 8mm creepage

The ADuM5401, ADuM5402, ADuM5403 and ADuM5404 digital isolators feature small surface mount packages (10 mm × 10 mm)  which can reduce board space by up to 70 percent. The new  digital isolators come with safety pre-approvals, allowing designers to realize faster design times as compared to discrete-based solutions.

The on-board isoPower isolated dc-to-dc converter provides up to 500 mW of regulated, isolated power and can operate at either 5.0-V or 3.3-V. A version with two channels (ADuM520x) and a version that features only the isoPower isolated power supply (ADuM5000) will be released later this year.

About Analog Devices’ iCoupler Technology
With more than 150 million channels deployed throughout the industry, ADI’s proven iCoupler technology is based on chipscale transformers, rather than on the LEDs and photodiodes found in optocouplers. Transformers can support higher data rates and lower power consumption, and are more stable over life as compared to LEDs and photodiodes. By fabricating the transformers directly on-chip using wafer-level processing, iCoupler channels can be integrated with each other and other semiconductor functions at low cost. iCoupler transformers are planar structures formed from CMOS and gold metal layers. A high breakdown polyimide layer underneath the gold layer insulates the top transformer coil from the bottom. CMOS circuits connected to the top coil and bottom coil provide the interface between each transformer and its external signals. For more on ADI’s iCoupler digital isolation technology, please visit www.analog.com/icouplerisolation5-08.

About Analog Devices’ isoPower DC-to-DC Converter
iCoupler digital isolators condition and drive data across transformers. ADI’s isoPower dc-to-dc converter uses the same chipscale transformer technology, but instead of transmitting data, isoPower employs switches, rectifiers, and regulators to generate power that is isolated to the same degree as the data channels. For more on ADI’s technique for isolating power, please visit www.analog.com/isopoweroverview5-08.

ADuM5401, ADuM5402, ADuM5403 and ADuM5404 digital isolators are available in a 16-lead wide-body SOIC package. Price: $5.00 each in 1K unit qty.

For more information about ADuM540x digital isolators, visit http://www.analog.com/pr/ADuM540x