Analog Devices Inc. ADUM4154ARIZ

Overview

ADUM4154ARIZ from Analog Devices is a 5 kV reinforced-isolation, 7-channel SPIsolator™ digital isolator optimized for multi-peripheral SPI communication. It integrates four high-speed isolation channels (MCLK, MO, SO, MSS) and two low-speed address lines (SSA0/SSA1) to drive up to four isolated peripheral devices, supporting SPI clock rates up to 17 MHz at 5 V operation with 12.5 ns pulse width and <2 ns pulse width distortion. It operates across −40°C to +125°C in industrial PLC and sensor isolation systems.

For engineers reviewing the ADUM4154ARIZ datasheet, ADUM4154ARIZ pinout, ADUM4154ARIZ application, or ADUM4154ARIZ equivalent, this page delivers verified specifications including 5 kV rms isolation rating, 25 kV/µs common-mode transient immunity, 20-lead SOIC_IC package with 8.3 mm creepage, propagation delay ≤26 ns (B grade), and mixed-voltage 3.3 V/5 V interface capability - all critical for robust SPI bus isolation in safety-critical industrial designs.

Technical Context

The ADUM4154ARIZ implements iCoupler® chip-scale transformer technology to deliver galvanic isolation between controller-side (VDD1) and peripheral-side (VDD2) domains. Its architecture separates high-speed SPI signals (MCLK, MO, SO, MSS) - rated up to 34 Mbps - from low-speed peripheral select addressing (SSA0/SSA1 at 250 kbps), enabling dynamic switching between up to four peripherals in as little as 2.5 µs.

It supports asymmetric supply configurations (e.g., 5 V on VDD1, 3.3 V on VDD2), maintains DC correctness under magnetic fields, and features glitch filtering on MSS to ensure reliable peripheral selection timing. The device meets reinforced insulation requirements per DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, and IEC 62368-1, with VIORM = 645 V peak and VISO = 5000 V rms for 1 minute.

Key Specifications

Pinout & Package

ADUM4154ARIZ is housed in a 20-lead SOIC_IC (wide-body) package with gull-wing leads, 1.27 mm pitch, and 8.3 mm minimum creepage distance between input and output sides. The package provides reinforced insulation and thermal resistance θJA = 46°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM4154ARIZ, ADUM4153ARIZ omits peripheral multiplexing capability - limiting scalability - while ADUM3154ARWZ trades isolation robustness for lower cost and footprint compatibility, making it unsuitable for medical or high-noise industrial deployments requiring 5 kV and 25 kV/µs performance.

Availability

ADUM4154ARIZ is available at Aetrix Electronics and suitable for industrial programmable logic controllers (PLCs), isolated sensor hubs, motor drive current feedback interfaces, and medical data acquisition modules requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.

Supply support for ADUM4154ARIZ 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 since 1965.

The ADuM4154ARIZ belongs to the SPIsolator™ family - engineered specifically to solve timing-critical, multi-peripheral SPI isolation challenges in safety-certified systems, combining iCoupler® isolation with intelligent peripheral addressing.

FAQ

What is the maximum SPI clock rate supported by the ADUM4154ARIZ?

The ADUM4154ARIZ supports up to 17 MHz SPI clock rate under 5 V operation (B grade), with guaranteed timing parameters including ≤14 ns propagation delay and ≤2 ns pulse width distortion. At 3.3 V operation, the maximum clock rate is 12.5 MHz. These values are validated across −40°C to +125°C and apply to MCLK, MO, and SO channels. The ADUM4154ARIZ datasheet specifies these limits in Tables 2 and 4 under "Switching Specifications."

Does the ADUM4154ARIZ support mixed-voltage operation between controller and peripheral sides?

Yes, the ADUM4154ARIZ fully supports mixed-voltage operation: VDD1 and VDD2 may be independently set to 3.0 V–3.6 V or 4.5 V–5.5 V. Valid configurations include 5 V/3.3 V and 3.3 V/5 V, with verified SPI clock rates up to 15.6 MHz and consistent propagation delay performance. This capability is documented in Tables 6 and 8 of the ADUM4154ARIZ datasheet under "Mixed 5 V/3.3 V" and "Mixed 3.3 V/5 V" electrical characteristics.

How many peripheral devices can the ADUM4154ARIZ interface with simultaneously?

The ADUM4154ARIZ supports up to four peripheral devices via its dedicated SSA0 and SSA1 address lines, which form a 2-bit select bus driving SS0–SS3 outputs. Peripheral selection changes occur in as little as 2.5 µs, enabling rapid reconfiguration without software overhead. This functionality is intrinsic to the ADUM4154ARIZ architecture and distinct from simpler 1:1 isolators like the ADUM4150 - confirmed in the "General Description" and "Functional Block Diagram" sections of the ADUM4154ARIZ datasheet.

What safety certifications does the ADUM4154ARIZ hold?

The ADUM4154ARIZ is certified to UL 1577 (5000 V rms, 1 min), DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation (VIORM = 645 V peak), IEC/EN/CSA 62368-1, IEC/CSA 61010-1, and IEC/CSA 60601-1 (2 MOPP). These approvals are explicitly listed in Table 11 of the ADUM4154ARIZ datasheet and marked by the * symbol on the package per VDE 0884-17 requirements.

What is the common-mode transient immunity (CMTI) specification for the ADUM4154ARIZ?

The ADUM4154ARIZ guarantees >25 kV/µs common-mode transient immunity, with typical performance up to 35 kV/µs, measured at VCM = 1000 V with 800 V transient magnitude. This parameter ensures reliable operation in high-noise environments such as motor drives and switch-mode power supplies. The value is specified in the "AC Specifications" section of the ADUM4154ARIZ datasheet (Tables 3, 5, 7, and 9) and applies to all isolation channels.