Analog Devices Inc. ADUM6420ABRNZ5-RL

Overview

ADUM6420ABRNZ5-RL from Analog Devices is a quad-channel digital isolator with integrated isoPower® DC-to-DC converter, delivering 100 mA isolated 5 V output, supporting 100 Mbps signal isolation per channel, and rated for operation up to 125°C. It eliminates external isolated power supplies in compact 500 mW isolated systems and is AEC-Q100 qualified for automotive on-board chargers and industrial PLCs.

For engineers reviewing the ADUM6420ABRNZ5-RL datasheet, ADUM6420ABRNZ5-RL pinout, ADUM6420ABRNZ5-RL application, or ADUM6420ABRNZ5-RL equivalent, key selection criteria include its 5 V/5 V isolated supply configuration, 28-lead SOIC package with 8.3 mm creepage, CISPR 32 Class B compliance at full load, and high common-mode transient immunity of 100 kV/µs.

Technical Context

The ADUM6420ABRNZ5-RL integrates four independent iCoupler® transformer-based digital isolation channels with a monolithic, regulated isolated DC-to-DC converter operating at 625 kHz PWM frequency and 180 MHz switching frequency. Its architecture enables simultaneous high-speed data transfer and isolated power delivery without external magnetics.

All four channels support bidirectional or unidirectional logic-level translation between primary (VDD1) and secondary (VISO) domains, with input thresholds defined as 0.7×VDDx/0.3×VDDx and output drive capability up to ±3.2 mA. Undervoltage lockout (1.5 V/1.6 V hysteresis) protects both sides during brownout conditions.

Key Specifications

Pinout & Package

ADUM6420ABRNZ5-RL uses a 28-lead, fine-pitch SOIC package (SOIC_W) with 1.27 mm pitch and 8.3 mm minimum creepage distance between primary and secondary sides. The package supports automated optical inspection and standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM6420ABRNZ5-RL, ADUM6421ABRNZ5-RL offers configurable channel directionality at identical performance, while SI88642ED-IS trades automotive qualification for lower EMI sensitivity - making ADUM6420ABRNZ5-RL optimal for AEC-Q100-compliant, high-CMTI, unidirectional signal isolation with integrated power.

Availability

ADUM6420ABRNZ5-RL is available at Aetrix Electronics and suitable for automotive on-board chargers, industrial PLCs, isolated RS-232 transceivers, and power supply start-up bias circuits requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for ADUM6420ABRNZ5-RL 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 ADuM6420A series belongs to Analog Devices' iCoupler® isolation product line, designed specifically to integrate signal and power isolation into single packages for compact, high-reliability systems in harsh electromagnetic environments.

FAQ

What is the maximum continuous output current of the ADUM6420ABRNZ5-RL at 125°C?

The ADUM6420ABRNZ5-RL delivers up to 100 mA at 5 V when ambient temperature is ≤85°C. Above 85°C, output current is derated linearly at 1.75 mA/°C, resulting in approximately 30 mA maximum continuous output at 125°C - verified in Table 1 of the Rev. C datasheet under "5 V Primary Input Supply/5 V Secondary Isolated Supply" conditions.

Does the ADUM6420ABRNZ5-RL require external components for its DC-DC converter to operate?

Yes - the ADUM6420ABRNZ5-RL requires two external bulk output capacitors (0.1 µF || 10 µF) on the VISO pin to meet ripple and noise specifications (75 mV p-p max). No external inductors or transformers are needed, as the isoPower® converter uses integrated chip-scale transformers. Ferrite beads are recommended for CISPR 32 Class B compliance on 2-layer PCBs.

Can the ADUM6420ABRNZ5-RL support 3.3 V logic on the isolated side?

No - the ADUM6420ABRNZ5-RL is configured for 5 V primary (VDD1) and 5 V isolated (VISO) operation only. For 3.3 V isolated supply, Analog Devices specifies the ADUM6420ABRNZ3-RL variant. The suffix "5" in ADUM6420ABRNZ5-RL explicitly denotes the 5 V/5 V output configuration per the Ordering Guide (page 32, Rev. C).

What safety certifications does the ADUM6420ABRNZ5-RL hold?

The ADUM6420ABRNZ5-RL carries UL 1577 recognition (5000 V rms for 1 minute), CSA certification to IEC 62368-1, IEC 61010-1, and IEC 60601-1, and CQC certification per GB4943.1-2011. Its VIORM rating is 566 V peak, and it complies with DIN V VDE V 0884-11 (pending certificate of conformity at time of Rev. C release).

How does the ADUM6420ABRNZ5-RL handle undervoltage conditions on both sides?

The ADUM6420ABRNZ5-RL implements independent undervoltage lockout (UVLO) on VDD1, VDD2, and VDDP rails with 1.5 V (falling) / 1.6 V (rising) thresholds and 0.1 V hysteresis. If any supply drops below VUV−, all outputs go high-impedance and internal regulators shut down - preventing metastable states and ensuring fail-safe behavior during brownouts.