Analog Devices Inc. ADUM3482ARSZ

Overview

ADUM3482ARSZ from Analog Devices is a quad-channel digital isolator using iCoupler® transformer-based isolation, providing 3.75 kV_RMS reinforced insulation, 25 Mbps data rate, and dual-supply operation (1.8–5.5 V I/O / 3.0–5.5 V core) for bidirectional signal isolation in industrial SPI interfaces and field bus systems.

For engineers reviewing the ADUM3482ARSZ datasheet, ADUM3482ARSZ pinout, ADUM3482ARSZ application, or ADUM3482ARSZ equivalent, this device supports level translation across isolated domains, offers output default control per side, operates up to 125°C, and delivers high common-mode transient immunity (>25 kV/µs) critical for noisy motor drive and PLC environments.

Technical Context

The ADUM3482ARSZ implements four independent isolation channels using monolithic air-core transformers, with separate core and I/O supplies enabling flexible voltage domain bridging. It features configurable output default states via CTRL1 and CTRL2 pins, and supports 1.8 V logic compatibility on both sides without external level shifters.

Its architecture provides low propagation delay (25 ns typical), pulse width distortion <3 ns, and channel-to-channel skew <7 ns (codirectional), making it suitable for time-critical isolated communication where deterministic timing and minimal jitter are required.

Key Specifications

Pinout & Package

ADUM3482ARSZ uses a 20-lead, RoHS-compliant SSOP package with 0.65 mm lead pitch and 5.3 mm minimum creepage/clearance. Input and output sides are physically segregated: Pins 1–10 form Side 1 (input/control); Pins 11–20 form Side 2 (output/control). GND1 (Pins 2,10) and GND2 (Pins 11,19) are internally connected pairs requiring local PCB grounding.

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 uniquely combines 1.8 V logic compatibility, side-specific output default control, and certified reinforced insulation in a single SSOP package-making it optimal for safety-critical, multi-voltage industrial I/O where startup behavior and noise resilience are design constraints.

Availability

ADUM3482ARSZ is available at Aetrix Electronics and suitable for industrial automation, motor control, and programmable logic controller (PLC) applications requiring stable component supply, long-term lifecycle assurance, and regulatory-compliant isolation.

Supply support for ADUM3482ARSZ 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.

The ADuM348x family is designed specifically for robust, low-power, multi-channel digital signal isolation in harsh industrial environments-emphasizing safety certification, wide supply flexibility, and deterministic timing behavior.

FAQ

What is the maximum data rate supported by ADUM3482ARSZ?

ADUM3482ARSZ supports up to 25 Mbps in NRZ format, verified across all operating voltages (1.8 V, 3 V, and 5 V I/O) and temperature ranges (−40°C to +125°C). This rating applies to each of its four isolated channels independently, with pulse width distortion maintained below 3 ns at 25 Mbps, ensuring reliable high-speed SPI and digital interface isolation without added timing uncertainty. The ADUM3482ARSZ datasheet specifies this performance in Tables 1, 4, and 7 under switching characteristics.

Does ADUM3482ARSZ support 1.8 V logic on both input and output sides?

Yes, ADUM3482ARSZ supports 1.8 V logic levels on both sides via separate VDDL1 and VDDL2 supplies, each adjustable from 1.8 V to 5.5 V. At 1.8 V, VIH is guaranteed ≥1.26 V and VOL ≤0.4 V at 2 mA load, enabling direct interfacing with 1.8 V MCUs and peripherals without external level shifters. This capability is explicitly detailed in Table 9 (1.8 V operation) and the General Description section of the ADUM3482ARSZ datasheet.

How does the CTRL1 and CTRL2 functionality work in ADUM3482ARSZ?

In ADUM3482ARSZ, CTRL1 (Pin 7) sets the default output state for Side 1 outputs (VOC, VOD), and CTRL2 (Pin 14) sets the default for Side 2 outputs (VOB, VOA). When pulled low, outputs default to logic low; when high, they default to logic high-ensuring defined states during power-up, brownout, or loss of input signal. This feature is unique to the ADUM3482ARSZ within the ADUM348x family and is documented in Table 19 and the Functional Block Diagram section.

What safety certifications apply to ADUM3482ARSZ?

ADUM3482ARSZ carries UL 1577 (3750 V_RMS, 1 min), DIN EN IEC 60747-17 (VDE 0884-17) reinforced insulation (VIORM = 560 V_peak), IEC/EN/CSA 62368-1, and IEC/CSA 61010-1 certifications. These are confirmed in Table 11 and the Regulatory Approvals section of the ADUM3482ARSZ datasheet, with the * marking on the package indicating VDE 0884-17 compliance.

Can ADUM3482ARSZ operate with a single supply voltage?

Yes, ADUM3482ARSZ can operate with a single supply when the I/O voltage range overlaps the core supply range (e.g., VDDL1 = VDD1 = 3.3 V or 5 V). In such cases, VDDL1 may be tied directly to VDD1 (and VDDL2 to VDD2), eliminating the need for separate I/O regulators. However, if level translation is required (e.g., 1.8 V ↔ 5 V), independent VDDLx and VDDx supplies must be used-per the Supply Voltages section and Figure 16 in the ADUM3482ARSZ datasheet.