Analog Devices Inc. ADUM5412BRSZ

Overview

ADUM5412BRSZ from Analog Devices is a quad-channel digital isolator with integrated isoPower® DC-to-DC converter, providing 3.3 V isolated output at up to 20 mA (66 mW) and 150 Mbps signal isolation per channel. It features 24-lead SSOP package with 5.3 mm creepage, 100 kV/µs common-mode transient immunity, and reinforced insulation rated to 573 V_PEAK per VDE 0884-17 - used in industrial PLC I/O modules for galvanic separation of microcontroller GPIO and field-side sensors.

For engineers reviewing the ADUM5412BRSZ datasheet, ADUM5412BRSZ pinout, ADUM5412BRSZ application, or ADUM5412BRSZ equivalent, key selection criteria include its asymmetric 3.3 V secondary supply capability, channel direction configuration (3 input + 1 output on primary side, 1 input + 3 outputs on isolated side), low propagation delay skew (<3 ns channel matching), and regulatory compliance for medical (IEC 60601-1) and industrial safety standards.

Technical Context

The ADUM5412BRSZ implements iCoupler® chip-scale transformer technology for both signal isolation and magnetic DC-DC conversion, eliminating external isolated power supplies. Its internal PWM-controlled oscillator operates at 600 kHz with 125 MHz switching frequency, delivering regulated 3.3 V output from 3.3 V or 5 V primary inputs.

It supports four independent unidirectional channels with fixed direction mapping: primary-side inputs I/O1A–I/O1C and output I/O1D; isolated-side inputs I/O2C–I/O2D and outputs I/O2A–I/O2B. This configuration enables bidirectional data flow across isolation barrier without requiring external level shifters or direction control logic.

Key Specifications

Pinout & Package

ADUM5412BRSZ uses a 24-lead SSOP package (7.6 mm × 12.8 mm, 0.635 mm pitch) with creepage ≥5.3 mm between input and output sides. Pin functions are defined per Table 2 of the datasheet Rev. B.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel isolated power applications.

Compared with ADUM5411BRSZ and SI88642ED-IS, the ADUM5412BRSZ uniquely combines asymmetric 3-input/1-output + 2-output/2-input channel mapping, integrated 3.3 V regulation, and medical-grade reinforced insulation - making it optimal for SPI-isolated sensor acquisition and PLC I/O where directionality and safety coexist.

Availability

ADUM5412BRSZ is available at Aetrix Electronics and suitable for industrial PLCs, medical patient monitors, motor drive controllers, and isolated sensor interfaces requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for ADUM5412BRSZ 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 company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial, and healthcare applications.

The ADUM5412BRSZ belongs to the iCoupler® digital isolator product line, designed specifically to replace optocouplers and discrete isolation solutions with integrated power and signal transfer in safety-critical, noise-immune systems.

FAQ

What is the maximum isolated output current supported by the ADUM5412BRSZ?

The ADUM5412BRSZ delivers up to 20 mA at 3.3 V (66 mW) on its VDD2 pin under recommended operating conditions. This is verified in Table 7 (3.3 V primary/3.3 V secondary mode) and Table 11 (5 V primary/3.3 V secondary mode) of the Rev. B datasheet. Exceeding 20 mA risks violating load regulation specs (±5%) and triggering thermal shutdown above 154°C.

Can the ADUM5412BRSZ be used with a 5 V primary supply and 3.3 V isolated output?

Yes - the ADUM5412BRSZ supports 5 V primary input with 3.3 V isolated output, as confirmed in Electrical Characteristics section "5 V Primary Input Supply / 3.3 V Secondary Isolated Supply" (Rev. B, p.7). Output regulation remains within ±5% (3.0 V to 3.6 V) at up to 30 mA load, with efficiency dropping to 24% at full load.

How does the channel direction configuration of the ADUM5412BRSZ differ from ADUM5410BRSZ and ADUM5411BRSZ?

Per Table 2 (Data Input/Output Port Assignments), ADUM5412BRSZ has I/O1A–I/O1C as inputs and I/O1D as output on the primary side, and I/O2A–I/O2B as outputs and I/O2C–I/O2D as inputs on the isolated side. This 3:1 + 2:2 asymmetry differs from ADUM5410 (4:0 + 0:4) and ADUM5411 (2:2 + 2:2), making ADUM5412BRSZ ideal for SPI master-slave topologies.

Does the ADUM5412BRSZ require external components for DC-DC regulation?

Yes - a resistor network (R1 = 10 kΩ, R2 = 16.9 kΩ to GND2) on the VSEL pin is mandatory to set the 3.3 V isolated output voltage, as specified in Tables 7 and 11. Omitting or misconfiguring these resistors results in undefined VDD2 voltage and potential functional failure.

What safety certifications apply to the ADUM5412BRSZ?

The ADUM5412BRSZ holds UL 1577 (2500 V_RMS/1 min), IEC/CSA 62368-1, IEC/CSA 60601-1 (1 MOPP), IEC/CSA 61010-1, CQC GB 4943.1, and DIN EN IEC 60747-17 (VDE 0884-17) with VIORM = 573 V_PEAK. These are listed in Table 22 of the Rev. B datasheet and validated per certified test reports.