ADUM4154ARIZ-RL - 5kV SPI Digital Isolator | Analog Devices
MPN: ADUM4154ARIZ-RL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
Drop-in alternatives for ADUM4154ARIZ-RL — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM4154ARIZ
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →ADUM4154BRIZ
✅ Drop-In✓ In Stock
$4.16 / Unit
View Datasheet →ADUM4154ARIZ-RL Maximum Ratings & Electrical Characteristics
| Isolation Voltage | 5000 Vrms |
| Number of Channels | 4 (SPI) + 2 (address) + 1 (SS) = 7 |
| Data Rate | 2 Mbps |
| CMTI | 25 kV/µs |
| Propagation Delay | [DATA_NEEDED: propagation delay] |
| SPI Clock Rate | Up to 17 MHz |
| Supply Voltage VDD1 | 4.5 V to 5.5 V |
| Supply Voltage VDD2 | 3.0 V to 3.6 V |
| Operating Temperature | -40°C to +125°C |
| Package | 20-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Technology | iCoupler |
| Number of Slave Devices Supported | 4 |
ADUM4154ARIZ-RL Pin Configuration
| Pin 1 | VDD1 — Primary side supply voltage (4.5V to 5.5V) |
| Pin 2 | GND1 — Primary side ground |
| Pin 3 | SCLK — SPI clock input |
| Pin 4 | MOSI — Master out slave in data |
| Pin 5 | MISO — Master in slave out data |
| Pin 6 | SS — Slave select input |
| Pin 7 | ADDR0 — Address pin 0 for slave select routing |
| Pin 8 | ADDR1 — Address pin 1 for slave select routing |
| Pin 9 | GND1 — Primary side ground |
| Pin 10 | NC — No connect |
| Pin 11 | NC — No connect |
| Pin 12 | GND2 — Secondary side ground |
| Pin 13 | SS1 — Slave select output 1 |
| Pin 14 | SS2 — Slave select output 2 |
| Pin 15 | SS3 — Slave select output 3 |
| Pin 16 | SS4 — Slave select output 4 |
| Pin 17 | GND2 — Secondary side ground |
| Pin 18 | VDD2 — Secondary side supply voltage (3.0V to 3.6V) |
| Pin 19 | NC — No connect |
| Pin 20 | NC — No connect |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADUM4154ARIZ-RL is suitable for 6 applications: Industrial Fieldbus Isolation, Isolated Sensor Interface, Motor Control, Medical Monitoring Equipment, Isolated Power Supply Control, Communication Systems.
Industrial Fieldbus Isolation
The ADUM4154ARIZ-RL provides galvanic isolation for SPI-based fieldbus interfaces in industrial automation. Its 5kV isolation and 25kV/µs CMTI ensure reliable communication in noisy environments with high voltage transients. The device supports SPI clock rates up to 17 MHz, enabling high-speed data transfer between a PLC and remote I/O modules. The low propagation delay and jitter maintain signal integrity over long cable runs, while the multiple slave support allows a single master to communicate with up to four isolated peripherals. This reduces component count and simplifies PCB layout compared to using multiple isolators.
Recommended
Isolated Sensor Interface
The ADUM4154ARIZ-RL is ideal for isolating SPI sensors such as temperature, pressure, and flow sensors from a central controller. Its 5kV isolation protects the controller from high voltages and ground loops, while the high CMTI ensures accurate data transmission in electrically noisy environments. The device supports up to four slave devices, allowing multiple sensors to share a single SPI bus with individual chip select lines. The wide operating temperature range of -40°C to +125°C makes it suitable for industrial and automotive sensing applications. The low propagation delay ensures real-time sensor data is available to the controller without significant latency.
Recommended
Motor Control
In motor control systems, the ADUM4154ARIZ-RL isolates the SPI communication between the microcontroller and gate driver or encoder. Its 5kV isolation protects the low-voltage control circuitry from high-voltage transients generated by the motor. The high CMTI of 25kV/µs ensures reliable operation in the presence of fast switching noise from the power stage. The device supports SPI clock rates up to 17 MHz, enabling high-speed communication for real-time control loops. The multiple slave support allows connection to multiple peripherals such as encoders and current sensors on a single isolated SPI bus.
Recommended
Medical Monitoring Equipment
The ADUM4154ARIZ-RL is used in medical devices to isolate patient-connected sensors from the main control unit, ensuring safety and preventing electrical shock. Its 5kV isolation meets stringent medical safety standards, while the high CMTI ensures reliable data transmission in the presence of interference from other medical equipment. The device supports SPI communication with multiple sensors, such as ECG, SpO2, and temperature probes, allowing a single isolator to handle multiple data streams. The wide operating temperature range and RoHS compliance make it suitable for medical devices that must meet environmental regulations.
Recommended
Isolated Power Supply Control
The ADUM4154ARIZ-RL can be used to isolate the SPI communication between a digital power controller and the power stage in isolated DC-DC converters. Its 5kV isolation provides safety isolation between the primary and secondary sides, while the high CMTI ensures reliable communication in the presence of switching noise. The device supports SPI clock rates up to 17 MHz, enabling fast control loops for precise voltage regulation. The multiple slave support allows connection to multiple power stages or monitoring ICs on a single isolated SPI bus, simplifying the design of complex power systems.
Recommended
Communication Systems
The ADUM4154ARIZ-RL is used in communication systems to isolate SPI interfaces between baseband processors and RF front-end modules. Its 5kV isolation prevents ground loops and reduces noise coupling, improving signal quality. The high CMTI of 25kV/µs ensures reliable operation in environments with high electromagnetic interference. The device supports SPI clock rates up to 17 MHz, enabling high-speed configuration and control of RF components. The multiple slave support allows a single processor to control multiple RF modules, such as PLLs, mixers, and amplifiers, through one isolated SPI bus.
Recommended
Recommended Products Summary
Engineering reference data for ADUM4154ARIZ-RL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM4154ARIZ | ADUM4154BRIZ | ADUM3154ARSZ | ISO7742DW | SI8642BB-B-IS1 |
|---|---|---|---|---|---|---|
| Package | 20-SOIC | 20-SOIC | 20-SOIC | 20-SSOP | SOIC-16 | SOIC-16 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Skyworks Solutions |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 2500 Vrms | 5000 Vrms | 5000 Vrms |
| Data Rate | 2 Mbps | 2 Mbps | 150 Mbps | 2 Mbps | 100 Mbps | 150 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs | 35 kV/µs |
| SPI Clock Rate | 17 MHz | 17 MHz | 17 MHz | 17 MHz | N/A (not SPI-specific) | N/A (not SPI-specific) |
| Number of Channels | 7 | 7 | 7 | 4 | 4 | 4 |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -55°C to +125°C | -40°C to +125°C |
Key Differentiators
- SPI-specific isolation with multiple slave support (vs ISO7742DW)
- Higher isolation voltage than ADUM3154ARSZ (vs ADUM3154ARSZ)
- Lower data rate but lower power consumption (vs ADUM4154BRIZ)
Design Notes
Ensure proper PCB layout to maintain isolation spacing between primary and secondary sides. Follow the manufacturer's recommended creepage and clearance distances for 5kV isolation. Use a solid ground plane on each side and avoid routing high-voltage traces near the isolation barrier.
Decouple VDD1 and VDD2 with 0.1µF and 10µF capacitors placed close to the pins. This ensures stable operation and reduces noise coupling across the isolation barrier. Consider using a dedicated power supply for each side to minimize ground bounce.
Do not exceed the absolute maximum ratings for supply voltages and isolation voltage. Ensure that the voltage differential between GND1 and GND2 does not exceed the isolation rating. Also, verify that the SPI signals are properly terminated to avoid reflections at high clock rates.
Compliance Information
RoHS compliant and lead-free per Analog Devices product page. AEC-Q100 not applicable as this is not an automotive-grade part.
