ADUM5401ARWZ-RL7 - Quad Digital Isolator w/ isoPower | ADI
MPN: ADUM5401ARWZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.68 | $2,340.00 |
| 1,000 | $4.16 | $4,160.00 |
ADUM5401ARWZ-RL7 Overview
A digital isolator is a component that provides galvanic isolation between two circuits while allowing digital signals to pass across the isolation barrier. It is essential in applications where ground potential differences, noise, or safety requirements demand electrical separation. Digital isolators are part of the broader category of isolation components, which also include optocouplers and magnetic isolators. They are widely used in industrial automation, medical equipment, and communication systems to protect sensitive electronics and ensure signal integrity.
Key features of the ADUM5401ARWZ-RL7 include four independent isolation channels, integrated DC-to-DC converter with up to 500 mW output power, 2500 Vrms isolation rating, 1 Mbps data rate, and 25 kV/µs CMTI. The device also features thermal shutdown protection and operates over a temperature range of -40°C to +105°C. The integrated isoPower converter simplifies power supply design by providing isolated power without an external transformer, reducing board space and component count.
Technically, the ADUM5401 uses Analog Devices' iCoupler technology, which employs chip-scale transformers to transmit data and power across the isolation barrier. This approach offers advantages over optocouplers, including higher data rates, lower power consumption, and better reliability. The integrated DC-to-DC converter uses a push-pull architecture to generate isolated power, achieving efficiencies up to 33% at full load. The device is designed to meet safety standards such as UL 1577 and IEC 60747-5-5, ensuring robust isolation performance.
Typical applications include industrial field bus isolation, isolated SPI/UART interfaces, power supply control, and data acquisition systems. The ADUM5401 is particularly suited for applications requiring isolated power and signal isolation in a compact form factor, such as PLCs, motor drives, and medical monitoring equipment. Its 2500 Vrms isolation rating and 1 Mbps data rate make it ideal for many industrial and instrumentation applications.
When designing with the ADUM5401, it is important to ensure proper PCB layout to maintain isolation spacing and minimize parasitic capacitance. The integrated DC-to-DC converter requires external capacitors for stability and filtering. Additionally, the input and output supplies should be decoupled with appropriate capacitors to ensure reliable operation.
Drop-in alternatives for ADUM5401ARWZ-RL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADUM5401ARWZ-RL7 (same form factor and footprint) — differing in Package, Common-Mode Transient Immunity (CMTI), Data Rate, Operating Temperature Range, Input Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM5401ARWZ
✅ Drop-In✓ In Stock
$5.5 / Unit
View Datasheet →ADUM5401CRWZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM5401WCRWZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM5402ARWZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.75 / Unit
View Datasheet →ADUM5403ARWZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$7.8 / Unit
View Datasheet →ISO7741DW
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADUM5401ARWZ-RL7 Specifications
| Number of Channels | 4 |
| Isolation Voltage | 2500 Vrms |
| Data Rate | 1 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Integrated DC-DC Converter | Yes, up to 500 mW |
| Input Supply Voltage | 5.0 V or 3.3 V |
| Output Supply Voltage | 5.0 V or 3.3 V (isolated) |
| Package | 16-SOIC (0.295", 7.50mm Width) |
| Operating Temperature Range | -40°C to +105°C |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
ADUM5401ARWZ-RL7 Pin Configuration
| Pin 1 | VDD1 — Input supply voltage (5.0 V or 3.3 V) |
| Pin 2 | GND1 — Input ground |
| Pin 3 | VIA — Input channel A |
| Pin 4 | VOA — Output channel A |
| Pin 5 | VIB — Input channel B |
| Pin 6 | VOB — Output channel B |
| Pin 7 | VIC — Input channel C |
| Pin 8 | VOC — Output channel C |
| Pin 9 | VID — Input channel D |
| Pin 10 | VOD — Output channel D |
| Pin 11 | GND2 — Output ground |
| Pin 12 | VDD2 — Isolated output supply voltage |
| Pin 13 | VISO — Isolated power output from DC-DC converter |
| Pin 14 | GND_ISO — Isolated ground for DC-DC converter |
| Pin 15 | NC — No connect |
| Pin 16 | NC — No connect |
Typical Applications
ADUM5401ARWZ-RL7 is suitable for 6 applications: Industrial Fieldbus Isolation, Isolated SPI/UART Interface, Power Supply Control, Medical Monitoring Equipment, Data Acquisition Systems, Motor Drive Isolation.
Industrial Fieldbus Isolation
The ADUM5401ARWZ-RL7 provides isolated power and signal isolation for industrial fieldbus interfaces such as RS-485, CAN, and Profibus. Its 2500 Vrms isolation and 25 kV/µs CMTI ensure reliable communication in noisy industrial environments. The integrated DC-DC converter eliminates the need for a separate isolated power supply, simplifying design and reducing board space. With a 1 Mbps data rate, it supports common fieldbus speeds. The device's thermal shutdown protection enhances system reliability. By using the ADUM5401, designers can achieve galvanic isolation between the controller and field-side transceivers, protecting sensitive electronics from ground loops and voltage transients.
Recommended
Isolated SPI/UART Interface
The ADUM5401ARWZ-RL7 is ideal for isolating SPI or UART interfaces between microcontrollers and peripheral devices. Its four channels can accommodate SPI signals (SCLK, MOSI, MISO, CS) or UART (TX, RX, and control lines). The integrated DC-DC converter provides isolated power to the peripheral side, eliminating the need for an external isolated supply. With a 1 Mbps data rate, it supports standard SPI and UART speeds. The device's low propagation delay ensures minimal signal skew. This application is common in data acquisition systems, motor drives, and medical devices where isolation is required for safety and noise immunity.
Recommended
Power Supply Control
The ADUM5401ARWZ-RL7 can be used to isolate control signals in power supply designs, such as feedback loops and enable signals. Its integrated DC-DC converter can power the secondary-side control circuitry, simplifying the design of isolated power supplies. The 2500 Vrms isolation rating ensures safe separation between primary and secondary sides. The device's 1 Mbps data rate is sufficient for control signals. The integrated isoPower converter reduces component count and board space. This application is common in AC-DC converters, DC-DC converters, and battery chargers where isolation is required for safety and to prevent ground loops.
Recommended
Medical Monitoring Equipment
The ADUM5401ARWZ-RL7 is suitable for medical monitoring equipment where patient safety requires galvanic isolation. Its 2500 Vrms isolation rating meets typical medical isolation requirements. The integrated DC-DC converter provides isolated power to sensors and signal conditioning circuits, eliminating the need for a separate isolated supply. The device's low power consumption and small footprint are advantageous in portable devices. The 1 Mbps data rate is adequate for biosignal transmission. The device's reliability and long-term stability make it suitable for critical medical applications. By using the ADUM5401, designers can ensure patient isolation and reduce the risk of electric shock.
Recommended
Data Acquisition Systems
The ADUM5401ARWZ-RL7 is used in data acquisition systems to isolate analog front-end circuits from digital processing units. Its four channels can isolate control signals and data lines. The integrated DC-DC converter provides isolated power to the analog front-end, reducing noise and improving measurement accuracy. The 2500 Vrms isolation rating protects sensitive electronics from ground potential differences. The device's 1 Mbps data rate supports high-speed data transfer. The integrated isoPower converter simplifies power supply design. This application is common in industrial automation, test and measurement, and environmental monitoring systems.
Recommended
Motor Drive Isolation
The ADUM5401ARWZ-RL7 provides isolation for motor drive control signals, such as PWM and fault feedback. Its 2500 Vrms isolation rating ensures safe separation between the control and power stages. The integrated DC-DC converter can power the gate driver circuitry on the high-voltage side. The device's 25 kV/µs CMTI ensures reliable operation in the presence of high dv/dt transients. The 1 Mbps data rate is sufficient for motor control signals. The device's thermal shutdown protection enhances system reliability. This application is common in industrial motor drives, robotics, and automotive systems.
Recommended
Recommended Products Summary
Engineering reference data for ADUM5401ARWZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM5401ARWZ | ADUM5401CRWZ | ADUM5401WCRWZ | ISO7741DW |
|---|---|---|---|---|---|
| Package | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) - same | 16-SOIC (0.295", 7.50mm Width) - same | 16-SOIC (0.295", 7.50mm Width) - same | 16-SOIC (0.295", 7.50mm Width) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Data Rate | 1 Mbps | 1 Mbps | 25 Mbps | 25 Mbps | 100 Mbps |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 5000 Vrms |
| Integrated DC-DC Converter | Yes (500 mW) | Yes (500 mW) | Yes (500 mW) | Yes (500 mW) | No |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs |
| Automotive Grade | No | No | No | Yes (AEC-Q100) | No |
| Number of Channels | 4 | 4 | 4 | 4 | 4 |
Key Differentiators
- Integrated DC-DC converter (vs ISO7741DW)
- Lower cost for moderate speed (vs ADUM5401CRWZ)
- Automotive grade option (vs ADUM5401WCRWZ)
Design Notes
For the ADUM5401ARWZ-RL7, maintain proper isolation spacing between the input and output sides on the PCB. The recommended creepage distance for 2500 Vrms is at least 8 mm, but follow the datasheet guidelines. Use a solid ground plane under the device, but ensure the isolation barrier is not bridged by copper. Place decoupling capacitors (0.1 µF and 10 µF) close to VDD1 and VDD2 pins to ensure stable operation of the integrated DC-DC converter.
The integrated DC-DC converter can deliver up to 500 mW. Ensure the total load on the isolated side does not exceed this limit. The efficiency is typically around 33%, so the input power must be sufficient. For example, to get 500 mW output, the input must supply about 1.5 W. Use appropriate input supply decoupling to handle the switching currents. Refer to the datasheet for recommended capacitor values and ESR requirements.
The ADUM5401ARWZ-RL7 dissipates power due to the DC-DC converter and signal isolation. At maximum load, the power dissipation can be significant. Ensure adequate thermal management, such as providing copper pour areas on the PCB to act as heat sinks. The operating temperature range is -40°C to +105°C, so keep the junction temperature within limits. For high ambient temperatures, derate the output power accordingly.
Compliance Information
RoHS compliant per distributor data. Not AEC-Q100 qualified; choose ADUM5401WCRWZ for automotive.