Analog Devices Inc. ADUM4221ARIZ

Overview

ADUM4221ARIZ from Analog Devices is an isolated half-bridge gate driver IC 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 MOSFETs in high-voltage switching power supplies and industrial inverters.

For engineers reviewing the ADUM4221ARIZ datasheet, ADUM4221ARIZ pinout, ADUM4221ARIZ application, or ADUM4221ARIZ equivalent, this page delivers verified specifications, functional pin mapping, real-world use cases for isolated gate driving, and validated alternative options for high-reliability power stage design.

Technical Context

The ADUM4221ARIZ uses iCoupler® monolithic transformer technology to achieve galvanic isolation between logic input (VDD1/GND1) and dual output domains (VDDA/GNDA and VDDB/GNDB), eliminating level-shifting limitations. Its CMOS-compatible 2.5–6.5 V input interface supports low-voltage controllers, while independent 4.5–35 V output supplies enable flexible gate biasing for SiC and GaN devices.

It integrates overlap protection, thermal shutdown (TSD at 155°C), and programmable dead time via a single external resistor (10 kΩ–500 kΩ) on the DT pin. Propagation delay is tightly controlled (tDLH/tDHL ≤ 33/44 ns) with <22 ns skew and <10 ns channel-to-channel matching, ensuring precise timing in high-frequency half-bridge topologies.

Key Specifications

Pinout & Package

ADUM4221ARIZ is housed in a 16-lead SOIC_IC wide-body package with increased creepage (8.3 mm) and reinforced insulation. Pin 3 and Pin 8 are internally connected VDD1 terminals; Pins 7, 12, and 13 are no-connect (NC) and must remain unconnected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si8273BD and ISO5852S, the ADUM4221ARIZ provides uniquely adjustable dead time, Grade-A/B/C UVLO selection, and identical 5700 V_rms isolation - making it optimal for high-reliability, high-frequency, and high-voltage SiC/GaN designs requiring timing precision and supply robustness.

Availability

ADUM4221ARIZ is available at Aetrix Electronics and suitable for industrial motor inverters, SiC-based EV onboard chargers, and renewable energy solar inverters requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.

Supply support for ADUM4221ARIZ 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, with deep expertise in isolation, power management, and precision signal chains.

The ADUM4221ARIZ belongs to the iCoupler® isolated gate driver product line, engineered specifically for high-efficiency, high-reliability power conversion systems demanding precise timing, robust noise immunity, and safety-certified galvanic isolation.

FAQ

What is the isolation voltage rating of the ADUM4221ARIZ?

The ADUM4221ARIZ has a rated dielectric insulation voltage of 5700 V_rms for 1 minute, with VIORM = 849 V_peak per DIN V VDE V 0884-11. This reinforced insulation rating enables compliance with IEC 62109, UL 62368, and other safety standards for industrial and renewable energy applications. The ADUM4221ARIZ achieves this through its wide-body SOIC_IC package with 8.3 mm creepage and clearance.

How does the adjustable dead time function on the ADUM4221ARIZ?

The ADUM4221ARIZ implements adjustable dead time via an external resistor (R_DT) connected between the DT pin and GND1. With R_DT = 10 kΩ, dead time is 48–76 ns; with 200 kΩ, it is 742–1135 ns; and with 500 kΩ, it reaches 1809–2831 ns. This feature prevents shoot-through in half-bridge configurations without requiring external logic or timers. The ADUM4221ARIZ's internal circuitry ensures monotonic, predictable delay scaling across temperature and supply variations.

Does the ADUM4221ARIZ support both SiC and GaN MOSFETs?

Yes, the ADUM4221ARIZ supports SiC and GaN MOSFETs through its 4 A peak output current, 4.5–35 V output supply range, and fast propagation delay (<44 ns). Its low R_DS(ON) (≤1.8 Ω) and high CMTI (±150 kV/µs) ensure reliable gate charging and noise immunity in high-dV/dt switching environments typical of wide-bandgap devices. The ADUM4221ARIZ also features default-low outputs and thermal shutdown, enhancing system safety during transient faults.

What are the UVLO options available on the ADUM4221ARIZ?

The ADUM4221ARIZ offers three factory-set UVLO grades for VDDA and VDDB: Grade A (4.4–4.5 V), Grade B (7.3–7.5 V), and Grade C (11.3–11.6 V). These thresholds are fixed per device variant and selected at order time (e.g., ADUM4221ARIZ is Grade A). VDD1 UVLO is fixed at 2.45–2.5 V. This grading allows designers to match gate driver supply stability requirements to specific power stage architectures - for example, Grade A suits 12 V auxiliary rails, while Grade C aligns with 15–20 V gate bias supplies.

Is the ADUM4221ARIZ pin-compatible with other members of the ADuM422x family?

No, the ADUM4221ARIZ is not pin-compatible with ADUM4222 or ADUM4223. While all share the same 16-lead SOIC_IC package and core functionality, pin assignments differ: ADUM4221ARIZ places VDD1 on Pins 3/8 and DT on Pin 6, whereas ADUM4222 uses Pin 6 for VDDA and ADUM4223 repurposes Pin 5. Substituting requires PCB redesign. Always verify pin configuration using Figure 3 in the ADUM4221 datasheet before migration. The ADUM4221ARIZ's pinout is unique to its dead-time-adjustable architecture.