Analog Devices Inc. ADUM4221-1ARIZ

Overview

ADUM4221-1ARIZ from Analog Devices is an isolated half-bridge gate driver with adjustable dead time, 4 A peak output current, 44 ns max propagation delay, and dual 4.5 V to 35 V output supply rails. It provides galvanic isolation between logic input (2.5–6.5 V) and high-side/low-side MOSFET/IGBT gate outputs, enabling robust switching control in high-voltage power converters.

For engineers reviewing the ADUM4221-1ARIZ datasheet, ADUM4221-1ARIZ pinout, ADUM4221-1ARIZ application, or ADUM4221-1ARIZ equivalent, key selection criteria include its single-PWM-input architecture with resistor-adjustable dead time, 5700 V_rms reinforced isolation rating, 150 kV/μs CMTI, thermal shutdown protection, and compatibility with GaN/SiC devices in industrial inverters and isolated DC-DC supplies.

Technical Context

The ADUM4221-1ARIZ implements iCoupler® monolithic transformer isolation to separate a single PWM input into complementary, isolated high-side (VOA) and low-side (VOB) gate drive outputs. Its internal control logic enforces programmable dead time via an external resistor on the DT pin, preventing shoot-through in half-bridge topologies.

It features independent UVLO monitoring on both output supplies (VDDA/VDDB), with Grade A thresholds (4.5 V max positive-going), and integrated thermal shutdown (TSD) that forces both outputs low above 155°C. Input logic operates at CMOS levels, and outputs deliver 4 A peak current with <2 Ω R_DS(ON) for fast gate charging.

Key Specifications

Pinout & Package

ADUM4221-1ARIZ uses a 16-lead SOIC_IC package with increased creepage (8.3 mm) for reinforced isolation. Pin 1 is PWM input; pins 3 and 8 are tied VDD1 inputs; pin 5 is DISABLE; pin 6 is DT; pins 9/14 are GNDB/GNDA; pins 10/15 are VOB/VOA; pins 11/16 are VDDB/VDDA.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated gate driver applications.

Compared with Si8273BD-D-IS and UCC5390SCD, ADUM4221-1ARIZ uniquely combines 5700 V_rms reinforced isolation, resistor-tunable dead time, and per-rail UVLO-enabling safer, more flexible half-bridge control without external components in high-reliability industrial and EV systems.

Availability

ADUM4221-1ARIZ is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, isolated DC-DC converters, and EV on-board chargers requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADUM4221-1ARIZ 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, headquartered in Norwood, MA.

The ADUM4221 family belongs to Analog Devices' iCoupler® isolated gate driver product line, designed specifically for high-reliability, high-speed switching control in isolated power conversion and motor drive systems.

FAQ

What is the maximum adjustable dead time range supported by the ADUM4221-1ARIZ?

The ADUM4221-1ARIZ supports an adjustable dead time range from 48 ns to 2831 ns, set by connecting a resistor between the DT pin and GND1. Values of 10 kΩ, 200 kΩ, and 500 kΩ yield nominal dead times of 62 ns, 938 ns, and 2320 ns respectively, as specified in the Rev. B datasheet Table 1. This range ensures robust shoot-through prevention across diverse switching frequencies and load conditions.

Does the ADUM4221-1ARIZ provide independent undervoltage lockout on both output supplies?

Yes, the ADUM4221-1ARIZ provides independent UVLO monitoring on both VDDA and VDDB rails, with Grade A thresholds (4.5 V maximum positive-going). This ensures that if either output supply drops below its UVLO threshold, the corresponding output is disabled-preventing partial or unsafe gate drive in asymmetrical power supply faults. The UVLO hysteresis is 0.2 V for both rails.

What is the thermal shutdown behavior of the ADUM4221-1ARIZ?

The ADUM4221-1ARIZ activates thermal shutdown (TSD) when the junction temperature exceeds 155°C, forcing both VOA and VOB outputs low. Recovery occurs only after the junction cools by 30°C (hysteresis), ensuring stable re-enablement. This behavior is fully specified in the datasheet's Electrical Characteristics table and protects downstream power devices during overload or cooling failure scenarios.

Can the ADUM4221-1ARIZ drive GaN or SiC power devices directly?

Yes, the ADUM4221-1ARIZ is explicitly qualified for GaN and SiC compatibility. Its 4 A peak output current, <2 Ω R_DS(ON), 44 ns max propagation delay, and ±150 kV/μs CMTI enable direct gate driving of low-Q_g wide-bandgap devices without external buffers. The datasheet lists "Gallium nitride (GaN)/silicon carbide (SiC) compatible" in its Applications section.

What safety certifications does the ADUM4221-1ARIZ hold?

The ADUM4221-1ARIZ carries pending approvals for UL 1577 (5700 V_rms, 1 min), CSA Component Acceptance Notice 5A, and VDE V 0884-11 (VIORM = 849 V_peak). It meets reinforced insulation requirements per IEC 62368-1 and IEC 60601-1 (2 MOPP), with certified creepage/clearance of 8.3 mm and CTI >600 V. Certification status is confirmed in the Rev. B datasheet Regulatory Information section.