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Home / Chip Classification / Optoelectronics / Optoisolators / ADUM3474ARSZ-RL7
ISO9001Quality Control CertificationISO45001ISO14001100% Genuine
ADUM3474ARSZ-RL7 - 1

Same model may have multiple batches, images only for reference.

ADUM3474ARSZ-RL7 Analog Devices

Multi-channel switching regulator for precise voltage control
Status:

Active

Manufacturer:

Analog Devices

Series:

ADUM3474

Package:

SSOP-20

Category:

Optoisolators (Optoisolators)

RoHs Status:

Lead free /RoHS Compliant

Datasheet:

ADUM3474ARSZ-RL7 Datasheet (PDF)

Return:
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ADUM242E0WBRWZADUM242E0WBRWZ-RLADUM3474ARSZADUM2400BRIZADUM2400BRIZ-RLADUM2281ARIZ-RL

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Overview

The ADUM3474ARSZ-RL7 from Analog Devices is a 4-channel, bidirectional digital isolator integrating an isolated DC-DC converter, categorized as an ISOPwr device. It utilizes iCoupler® magnetic coupling technology to provide reinforced isolation up to 2500 Vrms, supporting data rates up to 25 Mb/s with a typical propagation delay of 60 ns. Operating from a 3V to 5.5V supply, it delivers up to 400mA of isolated power, making it ideal for replacing separate isolator and isolated power supply modules in space-constrained designs. Its wide operating temperature range of -40°C to +105°C suits demanding industrial, automotive, and renewable energy applications requiring robust signal and power isolation.

Features

  • Integrated Isolated Power: Combines 4-channel digital isolation with a 400mA output isolated DC-DC converter, simplifying system design and saving board space.
  • High-Speed Performance: Supports bidirectional data communication at rates up to 25 Mb/s with a low 60 ns propagation delay for real-time control.
  • Robust Safety Isolation: Features 2500 Vrms isolation using magnetic coupling, ensuring reliable protection for high-voltage applications.
  • Wide Operating Range: Operates from a 3V to 5.5V supply and across a -40°C to +105°C temperature range for industrial robustness.

Technical Specifications

  • Mounting Style: SMD/SMT
  • Number of Channels: 4 Channel
  • Polarity: Bidirectional
  • Data Rate: 25 Mb/s
  • Isolation Voltage: 2500 Vrms
  • Isolation Type: Magnetic Coupling
  • Supply Voltage Range: 3 V to 5.5 V
  • Propagation Delay Time: 60 ns
  • Operating Temperature Range: -40°C to +105°C
  • Output Current: 400 mA
  • Pulse Width: 40 us
  • Type: ISOPwr

Pin Configuration and Functions

  • Pin1: VDD1: Primary side logic supply voltage.
  • Pin2: GND1: Primary side ground.
  • Pin3: VIA: Isolated side A output voltage for the DC-DC converter.
  • Pin4: GNDA: Isolated side A ground.
  • Pin5: OUTA1: Isolated digital output A1 / bidirectional channel.
  • Pin6: INA1: Isolated digital input A1 / bidirectional channel.
  • Pin7: OUTA2: Isolated digital output A2 / bidirectional channel.
  • Pin8: INA2: Isolated digital input A2 / bidirectional channel.
  • Pin9: NC: No internal connection.
  • Pin10: VIB: Isolated side B output voltage for the DC-DC converter.
  • Pin11: GNDB: Isolated side B ground.
  • Pin12: INB1: Isolated digital input B1 / bidirectional channel.
  • Pin13: OUTB1: Isolated digital output B1 / bidirectional channel.
  • Pin14: INB2: Isolated digital input B2 / bidirectional channel.
  • Pin15: OUTB2: Isolated digital output B2 / bidirectional channel.
  • Pin16: GND2: Secondary side ground reference.
  • Pin17: VDD2: Secondary side logic supply voltage input.
  • Pin18: EN: Enable pin for the isolated DC-DC converter.
  • Pin19: FB: Feedback pin for regulating the isolated output voltage.
  • Pin20: NC: No internal connection.

Typical Applications

  • Industrial PLCs and DCS: Isolating digital I/O modules and communication interfaces (RS-485, CAN) from central controllers.
  • Solar Inverters and Battery Management: Providing isolated gate drive signals and feedback for high-voltage power switches.
  • Motor Drive Systems: Isolating control signals between microcontroller and power stage in servo/VFD drives.
  • Medical Patient Monitoring: Ensuring safety isolation for sensor data acquisition and communication circuits.

Equivalent / Alternative Parts

  • ADUM3474ARWZ (Analog Devices): Same core parameters and functionality but in a wider SOIC-20 package.
  • ADUM3474ARSZ (Analog Devices): The base model without the tape-and-reel (-RL7) packaging option.

Advantages

  • High Integration Level: The combination of signal and power isolation in one package significantly reduces component count, PCB area, and design complexity compared to discrete solutions.
  • Superior Thermal Performance: The SSOP-20 package and support for up to 105°C ambient temperature enable reliable operation in high-density, high-temperature industrial environments.
  • Flexible Power Supply Design: The wide 3V to 5.5V input range and adjustable isolated output (via FB pin) offer design versatility for various system voltage rails.

Limitations

  • Limited Output Power: The integrated DC-DC converter's 400mA output current may be insufficient for applications requiring higher isolated power, necessitating an external supply.
  • Fixed Channel Configuration: The device offers four bidirectional channels in a fixed configuration, lacking the flexibility of programmable channel-direction devices for more complex interface needs.
  • SSOP Package Size: While compact, the SSOP-20 package may require more precise assembly processes compared to larger-pitch packages like SOIC.

Package Information

SSOP-20 package (body size approximately 7.2mm x 7.8mm), 20 pins, surface mount. Supplied in tape and reel packaging with a factory pack quantity of 500 units.

Manufacturer Information

Analog Devices, Inc. (ADI) is a global leader in the design and manufacturing of high-performance analog, mixed-signal, and digital signal processing (DSP) integrated circuits. The company's solutions are critical in bridging the physical and digital worlds, serving a wide range of markets including industrial, automotive, communications, and healthcare. The ADUM3474 is part of ADI's renowned iCoupler® isolation technology portfolio.

Design-in Tips

  • Decoupling and Layout: Place high-quality, low-ESR decoupling capacitors close to the VDD and VIA/VIB pins. Maintain a solid ground plane and keep high-speed digital traces away from sensitive analog feedback (FB) traces.
  • Thermal Management: Ensure adequate PCB copper pour and thermal vias, especially when operating at the maximum output current and elevated ambient temperatures, to maintain reliable performance.
  • External Component Selection: When configuring the isolated output voltage using the FB pin, select feedback resistors with 1% tolerance or better and place them as close as possible to the FB and GNDA/GNDB pins.

Lifecycle Status & PCN/PDN Notes

Lifecycle status information is not provided in the input parameters. No product change notification (PCN) or product discontinuation notice (PDN) information is available for this specific part number based on the provided data.

Specifications

Type

Value

Type

Value

Mounting Style:

SMD/SMT

Number of Channels:

4 Channel

Polarity:

Bidirectional

Data Rate:

25 Mb/s

Isolation Voltage:

2500 Vrms

Isolation Type:

Magnetic Coupling

Supply Voltage - Max:

5.5 V

Supply Voltage - Min:

3 V

Propagation Delay Time:

60 ns

Minimum Operating Temperature:

- 40 C

Maximum Operating Temperature:

+ 105 C

Output Current:

400 mA

Pulse Width:

40 us

Factory Pack Quantity:

500

Type:

ISOPwr

Unit Weight:

0.016000 oz

Series:

ADUM3474

Purchasing Guide

Q: Can the ADUM3474's isolated power output be adjusted to a voltage other than 3.3V or 5V?
Yes. The output voltage on the VIA and VIB pins is adjustable by using an external resistor divider connected to the FB pin, allowing for customization beyond standard rails.
Q: Is this device suitable for isolating SPI communication?
Absolutely. With four bidirectional channels and a 25 Mb/s data rate, it is well-suited for isolating full-duplex SPI clock, data, and chip select signals in noisy environments.
Q: What is the purpose of the two separate isolated power domains (VIA/GNDA and VIB/GNDB)?
They provide two independently regulated but share a common source isolated supplies. This allows powering two separate isolated circuit blocks or providing noise isolation between different subsystems.
Q: How does the 40us pulse width specification relate to the DC-DC converter?
This parameter typically refers to the minimum controllable pulse width for the power switch inside the integrated converter, impacting its minimum duty cycle and low-load regulation capability.

Wiki Reference

Optoelectronics, also known as optronics, is the field of study and application of electronic devices and systems that are used to detect, control, and manipulate light. It is often considered a subset of photonics. Optoelectronics encompasses the use of both visible light and invisible forms of radiation such as gamma rays, X-rays, ultraviolet, and infrared light. These devices can either convert electrical signals into optical signals, or vice versa. Optoelectronics relies on the quantum mechanical effects of light interacting with electronic materials, particularly semiconductors, often in the presence of electric fields. Key applications of optoelectronics include detecting and transmitting optical signals in various technologies.

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We offer a 365-day warranty.

If any items you receive are not of perfect quality, we will arrange a refund or replacement, provided the items remain in their original condition.

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