Analog Devices Inc. ADUM3482ARSZ-RL7

Overview

ADUM3482ARSZ-RL7 from Analog Devices is a quad-channel digital isolator using iCoupler® monolithic air-core transformer technology, providing 3.75 kV_RMS reinforced isolation between two independent domains. It supports up to 25 Mbps NRZ data rate, features 25 ns typical propagation delay, operates across 1.8 V–5.5 V I/O and 3.0 V–5.5 V core supplies, and delivers >25 kV/µs common-mode transient immunity - used in isolated SPI interfaces for industrial PLC I/O modules.

For engineers reviewing the ADUM3482ARSZ-RL7 datasheet, ADUM3482ARSZ-RL7 pinout, ADUM3482ARSZ-RL7 application, or ADUM3482ARSZ-RL7 equivalent, key selection criteria include channel directionality (2 forward / 2 reverse), output default control via CTRL1/CTRL2 pins, 20-lead SSOP package compatibility, and compliance with DIN EN IEC 60747-17 (VDE 0884-17) reinforced insulation at 560 V_PEAK.

Technical Context

The ADUM3482ARSZ-RL7 implements two unidirectional channels from Side 1 to Side 2 (VIA→VOA, VIB→VOB) and two reverse-direction channels from Side 2 to Side 1 (VIC→VOC, VID→VOD), enabling bidirectional data flow without external logic. Its dual-regulator architecture supplies isolated 3.0–5.5 V core power (VDD1/VDD2) and independently configurable 1.8–5.5 V I/O rails (VDDL1/VDDL2), supporting mixed-voltage interfacing such as 1.8 V microcontroller GPIO to 5 V FPGA side.

Each side includes dedicated output default control (CTRL1 on Side 1, CTRL2 on Side 2), allowing fail-safe high or low states during power-up or signal loss. The device meets reinforced insulation requirements per UL 1577 (3750 V_RMS/1 min), IEC/EN/CSA 62368-1, and DIN EN IEC 60747-17, with VIORM = 560 V_PEAK and working voltage VIOWM = 396 V_RMS.

Key Specifications

Pinout & Package

ADUM3482ARSZ-RL7 uses a 20-lead, 0.65 mm pitch, RoHS-compliant SSOP package (5.3 mm × 7.2 mm body). Pin 1 is marked by a dot; leads are numbered counterclockwise. Thermal resistance θ_JC = 50.5°C/W measured on a 4-layer board with thin traces.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel digital isolator applications.

Compared with SI8642ED-B-IS and ISO6742QDWR, ADUM3482ARSZ-RL7 uniquely combines 25 Mbps performance with independent 1.8–5.5 V I/O supplies, dual-output-default control, and VDE 0884-17 reinforced certification - making it optimal for safety-critical, mixed-voltage industrial interfaces where timing predictability and fail-safe behavior are mandatory.

Availability

ADUM3482ARSZ-RL7 is available at Aetrix Electronics and suitable for industrial automation, energy storage systems, and electric vehicle charging infrastructure requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADUM3482ARSZ-RL7 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision, power, and connectivity applications.

The ADuM348x family was designed specifically for robust, low-latency multichannel isolation in harsh industrial and automotive environments - emphasizing safety certification, wide supply flexibility, and deterministic power-on behavior.

FAQ

What is the channel direction configuration of ADUM3482ARSZ-RL7?

ADUM3482ARSZ-RL7 has two forward channels (Side 1 → Side 2: VIA→VOA, VIB→VOB) and two reverse channels (Side 2 → Side 1: VIC→VOC, VID→VOD). This bidirectional arrangement matches SPI full-duplex signaling without external direction control logic, distinguishing it from unidirectional quad isolators like ADUM3470.

Does ADUM3482ARSZ-RL7 support 1.8 V logic on both sides simultaneously?

Yes - ADUM3482ARSZ-RL7 supports 1.8 V I/O operation on both sides (VDDL1 = VDDL2 = 1.8 V), with core supplies VDD1/VDD2 ≥3.0 V. At 1.8 V, typical propagation delay is 43–85 ns (B grade), and dynamic supply current remains below 1.1 mA per channel at 25 Mbps, enabling ultra-low-power sensor node isolation.

How does the CTRL1 and CTRL2 functionality work in ADUM3482ARSZ-RL7?

CTRL1 sets the default output state of Side 1 outputs (VOA, VOB) during power-up or loss of input signal; CTRL2 does the same for Side 2 outputs (VOC, VOD). A logic low forces default low; high forces default high. This ensures fail-safe behavior in safety-critical systems - for example, keeping gate drivers disabled until firmware initializes.

What safety certifications apply to ADUM3482ARSZ-RL7?

ADUM3482ARSZ-RL7 is certified to UL 1577 (3750 V_RMS/1 min), DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation (VIORM = 560 V_PEAK), IEC/EN/CSA 62368-1, and IEC/CSA 61010-1. The * marking on the package indicates VDE 0884-17 compliance, required for medical and industrial safety approvals.

Can ADUM3482ARSZ-RL7 replace ADUM3481 or ADUM3480 in existing designs?

No - ADUM3482ARSZ-RL7 has a unique pinout (e.g., VIC/VOD on Pins 5/6 vs. VIC/VID on ADUM3480) and channel mapping. Swapping requires PCB layout changes. However, its 20-lead SSOP footprint matches all ADuM348x variants, and electrical specs (speed, isolation, supply ranges) are identical across the family - only pin function allocation differs.