Analog Devices Inc. ADUM4150ARIZ-RL

Overview

ADUM4150ARIZ-RL from Analog Devices is a 6-channel, 5 kV reinforced digital isolator optimized for isolated SPI interfaces, featuring four high-speed SPI signal channels (MCLK, MSS, MO/SI, MI/SO), two bidirectional low-speed data channels (VIA/VIB), and a dedicated delay clock (DCLK) supporting up to 40 MHz operation in delay-clock mode. It delivers 13 ns propagation delay on fast channels and 250 kbps on slow channels, enabling robust isolation in industrial PLC backplanes and sensor front-ends.

For engineers reviewing the ADUM4150ARIZ-RL datasheet, ADUM4150ARIZ-RL pinout, ADUM4150ARIZ-RL application, or ADUM4150ARIZ-RL equivalent, key selection criteria include its 5 kV rms isolation rating, 125°C operating temperature, 25 kV/µs common-mode transient immunity, SOIC_IC-20W package with 8.3 mm creepage, and support for mixed-voltage (3.3 V/5 V) SPI domain bridging.

Technical Context

The ADUM4150ARIZ-RL implements iCoupler® chip-scale transformer isolation across six independent channels: four unidirectional high-speed SPI lines (MCLK, MSS, MO/SI, MI/SO) and two bidirectional low-speed data paths (VIA/VIB). Its delay clock (DCLK) output on the primary side enables 40 MHz SPI timing by compensating for round-trip propagation delays (tPMCLK + tPSO).

It supports three supply configurations-5 V/5 V, 3.3 V/3.3 V, and mixed 5 V/3.3 V or 3.3 V/5 V-with guaranteed 17 MHz SPI clock rate in standard 4-wire mode and 12.5–15.6 MHz under mixed-voltage operation. Propagation delay matching between codirectional channels is ≤3 ns, and jitter remains ≤1 ns on high-speed paths.

Key Specifications

Pinout & Package

ADUM4150ARIZ-RL uses a 20-lead SOIC_IC package (width 7.6 mm, creepage 8.3 mm) with gull-wing leads and reinforced insulation barrier separating Side 1 (VDD1, pins 1–10) and Side 2 (VDD2, pins 11–20).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SPI isolator applications.

Compared with ADUM4151ARIZ-RL and ADUM3150ARIZ-RL, the ADUM4150ARIZ-RL uniquely combines 5 kV reinforced isolation, 40 MHz delay-clock capability, and dual slow channels-making it the sole option for high-reliability, high-speed industrial SPI isolation requiring both safety compliance and timing headroom.

Availability

ADUM4150ARIZ-RL is available at Aetrix Electronics and suitable for industrial programmable logic controllers (PLC), sensor isolation interfaces, motor drive feedback systems, and isolated power supply monitoring requiring stable component supply and long-term lifecycle support.

Supply support for ADUM4150ARIZ-RL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision signal chain solutions.

The ADuM4150 product line delivers reinforced-isolation SPI interface ICs using iCoupler® transformer technology, designed specifically for noise-immune, timing-accurate digital isolation in safety-critical industrial automation and instrumentation systems.

FAQ

What is the maximum SPI clock frequency supported by ADUM4150ARIZ-RL in standard 4-wire mode?

The ADUM4150ARIZ-RL supports up to 17 MHz SPI clock frequency in standard 4-wire mode when operated at 5 V/5 V supply. At 3.3 V/3.3 V, the maximum is 12.5 MHz, and mixed-supply configurations (e.g., 5 V/3.3 V) support up to 15.6 MHz. These values are guaranteed across the full −40°C to +125°C operating range and include timing margins for propagation delay and jitter.

Does ADUM4150ARIZ-RL support mixed-voltage operation between 3.3 V and 5 V domains?

Yes, ADUM4150ARIZ-RL fully supports mixed-voltage operation: VDD1 can be 3.3 V while VDD2 is 5 V, or vice versa. Electrical specifications-including SPI clock rate (up to 15.6 MHz), propagation delay (≤27 ns), and common-mode transient immunity (>25 kV/µs)-are validated for both configurations per Tables 6 and 8 of the datasheet Rev. E.

How does the DCLK output on ADUM4150ARIZ-RL enable 40 MHz SPI operation?

The DCLK output on ADUM4150ARIZ-RL is a delayed version of the primary MCLK signal, offset by the sum of tPMCLK (MCLK propagation to secondary side) and tPSO (SO propagation back to primary side). This compensation allows an external latch on the primary side to sample SO data synchronously at 40 MHz, effectively doubling the usable SPI throughput without violating timing constraints.

What safety certifications apply to ADUM4150ARIZ-RL?

ADUM4150ARIZ-RL is certified to UL 1577 (5000 V rms, 1 min), DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation, IEC/EN/CSA 62368-1, IEC/CSA 61010-1, and IEC/CSA 60601-1. It achieves 2 MOPP for medical applications and meets creepage/clearance requirements of 8.3 mm per IEC 62368-1 Pollution Degree 2.

Can the slow channels (VIA/VIB) of ADUM4150ARIZ-RL be used for bidirectional communication?

Yes, the VIA and VIB channels of ADUM4150ARIZ-RL are fully bidirectional, each supporting 250 kbps data transfer in both directions. They operate with 0.1–2.6 µs propagation delay and 2.5 µs jitter, and include internal asynchronous sampling to handle edge sequencing-enabling use cases like sensor configuration writes and status reads over the same physical link.