Analog Devices Inc. ADUM6403ARWZ

Overview

ADUM6403ARWZ from Analog Devices is a quad-channel digital isolator with integrated isoPower® DC-to-DC converter delivering regulated 3.3 V or 5.0 V isolated output up to 400 mW, supporting 25 Mbps NRZ data rates, 5 kV rms isolation, and operation up to 105°C - used in medical isolation and RS-485 transceiver biasing.

For engineers reviewing the ADUM6403ARWZ datasheet, ADUM6403ARWZ pinout, ADUM6403ARWZ application, or ADUM6403ARWZ equivalent, this page delivers verified specifications, SOIC-W-16 pin mapping, safety-certified insulation parameters, and validated alternative parts for industrial and medical isolated power + signal designs.

Technical Context

The ADUM6403ARWZ implements iCoupler® transformer-based isolation across four independent channels with Schmitt-triggered inputs and bidirectional signal capability per channel pair. Its integrated DC-to-DC converter uses high-frequency switching (625 kHz PWM, 180 MHz oscillator) to generate regulated isolated VISO from primary-side VDD1.

It supports three input/output voltage configurations: 5 V/5 V (400 mW), 5 V/3.3 V (330 mW), and 3.3 V/3.3 V (132 mW), with undervoltage lockout (2.4 V–2.7 V thresholds) and thermal shutdown at 150°C. Common-mode transient immunity exceeds 25 kV/μs, meeting reinforced insulation requirements per VDE V 0884-10.

Key Specifications

Pinout & Package

ADUM6403ARWZ is housed in a 16-lead SOIC wide-body package (RW-16) with 7.6 mm minimum creepage distance, rated for 5000 V rms isolation and compliant with UL, VDE, and IEC 60601-1 standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM6403CRWZ, the ADUM6403ARWZ offers broader temperature tolerance but looser timing specs; versus SI8642ED-B-IS, it eliminates external power conversion but occupies more PCB area due to integrated magnetics.

Availability

ADUM6403ARWZ is available at Aetrix Electronics and suitable for medical patient monitoring, industrial motor control, AC/DC auxiliary power start-up, and isolated RS-485 transceiver applications requiring stable component supply and long-term lifecycle support.

Supply support for ADUM6403ARWZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and healthcare markets.

The ADUM6403ARWZ belongs to the iCoupler® isoPower® family, designed specifically to replace optocouplers and discrete isolation + DC/DC solutions in medical, industrial, and energy systems demanding certified reinforced insulation and integrated power.

FAQ

What is the maximum continuous output power of the ADUM6403ARWZ in 5 V input / 3.3 V output mode?

The ADUM6403ARWZ delivers up to 330 mW of continuous isolated output power when configured with a 5.0 V primary input and 3.3 V secondary output, as specified in Table 1 of the Rev. B datasheet. This power level supports typical isolated RS-485 transceivers and low-power microcontrollers without requiring additional DC/DC stages. The ADUM6403ARWZ maintains regulation within ±5% load regulation across its full output current range.

Does the ADUM6403ARWZ require external bypass capacitors, and if so, what values are mandatory?

Yes, the ADUM6403ARWZ requires two parallel bypass capacitors (CBO) on the VISO pin: one 0.1 μF ceramic and one 10 μF tantalum or aluminum electrolytic capacitor, connected between pins 15 and 16 (both labeled CBO) and GNDISO. These are mandatory per Figure 1 and Table 2 to suppress high-frequency ripple (75 mV p-p max) and ensure stable 3.3 V or 5.0 V regulation. Omitting them causes excessive noise and potential DC/DC instability. The ADUM6403ARWZ datasheet specifies these values for all operating modes.

How does the VSEL pin configure the output voltage of the ADUM6403ARWZ?

The VSEL pin on the ADUM6403ARWZ selects the isolated output voltage: tie VSEL to GNDISO for 3.3 V VISO, or tie VSEL to VISO for 5.0 V VISO. This configuration is fixed at power-up and cannot be changed dynamically. The ADUM6403ARWZ does not support 3.3 V input / 5.0 V output operation. When VSEL = GNDISO, the device regulates VISO to 3.3 V ±5% across load currents up to 100 mA in 5 V input mode - a key specification confirmed in Table 10.

What safety certifications apply to the ADUM6403ARWZ in the RW-16 package?

The ADUM6403ARWZ in the RW-16 package carries UL recognition (5000 V rms per UL 1577), CSA Component Acceptance Notice 5A (pending), and VDE certification to DIN V VDE V 0884-10:2006-12 for reinforced insulation with VIORM = 846 V peak. It meets IEC 60601-1 (250 V rms) and IEC 60950-1 (400 V rms) working voltage requirements. These certifications are explicitly listed in Table 15 for the RW-16 variant, and the ADUM6403ARWZ part number corresponds to this package.

Can the ADUM6403ARWZ support bidirectional data transmission on the same channel pair?

No, the ADUM6403ARWZ provides unidirectional channels only - each of the four channels has fixed input and output direction as defined in Figure 5: VIA→VOB, VIB→VOA, VIC→VOC, VID→VOD. Bidirectional communication requires external logic or separate transmit/receive channel pairing. This directional assignment is hardwired and cannot be reconfigured. The ADUM6403ARWZ datasheet confirms this in the Functional Block Diagrams section and pin function table.