Analog Devices Inc. ADUM4221-1ARIZ-RL

Overview

ADUM4221-1ARIZ-RL 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 4.5–35 V output supply capability. It delivers galvanic isolation for high-side/low-side MOSFET/IGBT control in switching power supplies and industrial inverters.

For engineers reviewing the ADUM4221-1ARIZ-RL datasheet, ADUM4221-1ARIZ-RL pinout, ADUM4221-1ARIZ-RL application, or ADUM4221-1ARIZ-RL equivalent, key selection considerations include its single-PWM-input architecture, 16-pin SOIC_IC wide-body package, 150 kV/μs CMTI, UVLO grade B (7.5 V), and thermal shutdown at 155°C.

Technical Context

The ADUM4221-1ARIZ-RL integrates iCoupler® transformer-based isolation with independent high-side and low-side gate drive outputs. Its single PWM input with complementary output logic eliminates external logic inversion, while the DT pin enables precise dead time adjustment via a single resistor (10–500 kΩ).

It features dual UVLO thresholds (VDDA/VDDB positive-going = 7.5 V max for Grade B), internal thermal shutdown (TSD), and default-low output state. The device operates across −40°C to +125°C junction temperature with 5700 V rms reinforced isolation and 849 V peak VIORM per VDE V 0884-11.

Key Specifications

Pinout & Package

ADUM4221-1ARIZ-RL uses a 16-lead SOIC_IC wide-body package with increased creepage (8.3 mm) for reinforced isolation. Pin 3 and Pin 8 are internally connected VDD1 inputs; Pins 2, 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 gate driver applications.

Compared with Si8273ABD-IS and UCC5350MCDWVR, ADUM4221-1ARIZ-RL uniquely combines single-PWM input, user-adjustable dead time, 2.5–6.5 V logic compatibility, and Grade B UVLO-reducing component count and improving system reliability in high-noise industrial inverters.

Availability

ADUM4221-1ARIZ-RL is available at Aetrix Electronics and suitable for switching power supplies, isolated IGBT/MOSFET gate drives, and industrial inverters requiring stable component supply and long-term lifecycle support.

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

The ADuM4221 family is designed specifically for isolated gate driving in high-reliability industrial, automotive, and energy infrastructure systems-emphasizing robustness, precision timing, and safety-certified reinforcement.

FAQ

What is the function of the DT pin on the ADUM4221-1ARIZ-RL?

The DT (Dead Time) pin on the ADUM4221-1ARIZ-RL accepts an external resistor to ground to set the dead time between high-side and low-side output transitions. With R_DT = 10 kΩ to 500 kΩ, ADUM4221-1ARIZ-RL provides adjustable dead time from 48 ns to 2831 ns, preventing shoot-through in half-bridge configurations without external logic. This feature is exclusive to ADUM4221 and ADUM4221-1 variants.

Does the ADUM4221-1ARIZ-RL support both 3.3 V and 5 V microcontroller interfaces?

Yes, the ADUM4221-1ARIZ-RL supports logic input voltages from 2.5 V to 6.5 V, making it compatible with both 3.3 V and 5 V microcontrollers without level-shifting. Its VIH threshold is 0.7 × VDD1 (min 3.5 V when VDD1 > 5 V) and VIL is 0.3 × VDD1 (max 1.5 V when VDD1 ≤ 5 V), ensuring robust noise margins across both logic families.

What safety certifications apply to the ADUM4221-1ARIZ-RL?

The ADUM4221-1ARIZ-RL 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, reinforced insulation). It meets IEC 62368-1 (basic insulation at 900 V peak) and IEC 60601-1 (2 MOPP) requirements, supporting system-level safety certification in medical and industrial equipment.

How does the ADUM4221-1ARIZ-RL handle undervoltage lockout on its output supplies?

The ADUM4221-1ARIZ-RL implements Grade B UVLO on VDDA and VDDB with a positive-going threshold of 7.5 V maximum and 0.2 V hysteresis. When either supply drops below 7.1 V (negative-going), outputs are disabled until voltage rises above 7.5 V. This prevents unreliable gate drive during power-up/down transients in 12 V or 15 V gate supply rails.

Can the ADUM4221-1ARIZ-RL drive GaN and SiC power devices effectively?

Yes, the ADUM4221-1ARIZ-RL is explicitly qualified for GaN and SiC compatibility. Its 4 A peak output current, <44 ns propagation delay, 150 kV/μs CMTI, and fast rise/fall times (14–34 ns) enable clean, jitter-free switching of high-speed wide-bandgap devices. The datasheet confirms operation with 2 Ω gate resistance and 15 V supplies-typical conditions for GaN HEMTs and SiC MOSFETs.