Analog Devices Inc. ADUM4221BRIZ-RL

Overview

ADUM4221BRIZ-RL from Analog Devices is an isolated half-bridge gate driver with independent high-side and low-side outputs, 4 A peak output current, adjustable dead time (48–2831 ns), and 5700 V_rms reinforced isolation in a wide-body 16-lead SOIC_IC package. It drives IGBTs and SiC/GaN FETs in high-voltage switching power supplies and industrial inverters.

For engineers reviewing the ADUM4221BRIZ-RL datasheet, ADUM4221BRIZ-RL pinout, ADUM4221BRIZ-RL application, or ADUM4221BRIZ-RL equivalent, key selection criteria include its 44 ns max propagation delay, dual UVLO thresholds (Grade B: 7.5 V), 150 kV/µs CMTI, thermal shutdown at 155°C, and compatibility with 2.5–6.5 V logic inputs and 4.5–35 V output supplies.

Technical Context

The ADUM4221BRIZ-RL uses iCoupler® monolithic transformer technology to achieve galvanic isolation between input logic (VDD1/GND1) and dual output domains (VDDA/GNDA and VDDB/GNDB). Its CMOS input stage accepts 2.5–6.5 V logic levels, while independent UVLO circuits monitor VDDA and VDDB with Grade B thresholds (7.3–7.5 V positive-going).

Dead time is set externally via a resistor from DT to GND1, yielding precise control (48–2831 ns) over high-side/low-side overlap prevention. Internal thermal shutdown forces both outputs low above 155°C, and the default-low output state ensures fail-safe operation during power loss or disable assertion.

Key Specifications

Pinout & Package

ADUM4221BRIZ-RL is housed in a 16-lead wide-body SOIC_IC package (RI-16-2) with 8.3 mm creepage/clearance, optimized for reinforced isolation in high-voltage applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si8273BD-IS and ISO5852S, ADUM4221BRIZ-RL uniquely delivers 4 A drive strength, user-adjustable dead time, and Grade-B UVLO-all within a single 16-pin SOIC package-making it optimal for high-performance SiC/GaN systems requiring timing precision and robust rail monitoring.

Availability

ADUM4221BRIZ-RL is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, EV onboard chargers, and high-density telecom power supplies requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.

Supply support for ADUM4221BRIZ-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 precision instrumentation, industrial automation, and power conversion markets.

The ADUM4221BRIZ-RL belongs to the iCoupler® isolated gate driver product line, designed specifically for high-reliability, high-speed switching in isolated power topologies including half-bridges, full-bridges, and three-phase inverters.

FAQ

What is the isolation rating and safety certification status of ADUM4221BRIZ-RL?

ADUM4221BRIZ-RL provides 5700 V_rms reinforced isolation for 1 minute and meets DIN VDE V 0884-11 (VIORM = 849 V_peak). It carries pending UL 1577 recognition, CSA Component Acceptance Notice 5A, and VDE certificate of conformity. The device is rated for basic insulation at 900 V_peak and reinforced insulation at 849 V_peak, with 20-year minimum insulation lifetime per VDE-0884-11.

How does the adjustable dead time function in ADUM4221BRIZ-RL?

ADUM4221BRIZ-RL implements adjustable dead time via an external resistor (R_DT) connected between the DT pin and GND1. With R_DT ranging from 10 kΩ to 500 kΩ, dead time is precisely tuned from 48 ns to 2831 ns. This eliminates shoot-through risk in half-bridge configurations without requiring external logic or microcontroller intervention-enabling robust, self-contained timing control.

What are the UVLO thresholds for VDDA and VDDB on ADUM4221BRIZ-RL?

ADUM4221BRIZ-RL features Grade B UVLO for VDDA and VDDB, with a positive-going threshold of 7.3–7.5 V and negative-going threshold of 6.9–7.1 V (hysteresis = 0.2 V). This ensures gate drive remains disabled until output supplies reach a stable, noise-immune level-preventing weak turn-on and associated conduction losses in high-side switches.

Does ADUM4221BRIZ-RL support 3.3 V logic inputs?

Yes, ADUM4221BRIZ-RL fully supports 3.3 V logic inputs: its VDD1 supply range is 2.5–6.5 V, and input thresholds scale with VDD1 (VIH = 0.7 × VDD1, VIL = 0.3 × VDD1). At VDD1 = 3.3 V, VIH = 2.31 V and VIL = 0.99 V-ensuring reliable detection of standard 3.3 V CMOS logic levels without level-shifting circuitry.

What thermal protection mechanisms does ADUM4221BRIZ-RL include?

ADUM4221BRIZ-RL incorporates internal thermal shutdown (TSD) that forces both outputs low when junction temperature exceeds 155°C. It includes 30°C hysteresis, so outputs remain disabled until temperature falls below 125°C. This protects against sustained overload, inadequate heatsinking, or ambient overheating-ensuring fail-safe behavior without external thermal monitoring.