Analog Devices Inc. ADUM4221CRIZ-RL

Overview

ADUM4221CRIZ-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 MOSFETs in high-voltage switching power supplies and industrial inverters.

For engineers reviewing the ADUM4221CRIZ-RL datasheet, ADUM4221CRIZ-RL pinout, ADUM4221CRIZ-RL application, or ADUM4221CRIZ-RL equivalent, key selection criteria include its 44 ns max propagation delay, dual UVLO thresholds (Grade C: 11.6 V), 150 kV/µs CMTI, 125°C junction operation, and resistor-programmable dead time - all critical for reliable high-frequency, high-side/low-side synchronous switching.

Technical Context

The ADUM4221CRIZ-RL uses iCoupler® monolithic transformer technology to achieve galvanic isolation between logic input (VDD1: 2.5–6.5 V) and dual output domains (VDDA/VDDB: 4.5–35 V), eliminating level-shifting complexity. Its CMOS-compatible inputs interface directly with microcontrollers or PWM controllers without external buffers.

It integrates overlap protection, thermal shutdown (TSD at 155°C), and independent UVLO on both output rails with Grade C thresholds (11.6 V positive-going), ensuring safe turn-off during supply brownout. Dead time is set by a single resistor from DT to GND1, enabling precise control of shoot-through prevention in half-bridge topologies.

Key Specifications

Pinout & Package

ADUM4221CRIZ-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 and high-voltage PCB layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si8273BD-D-IS and UCC5390SCD, ADUM4221CRIZ-RL uniquely delivers 4 A drive, <44 ns delay, and resistor-adjustable dead time in a single reinforced-isolation package - simplifying design, improving timing accuracy, and reducing board space for high-performance half-bridge systems.

Availability

ADUM4221CRIZ-RL is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, and EV onboard chargers requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp-up.

Supply support for ADUM4221CRIZ-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 ADUM4221CRIZ-RL belongs to the iCoupler® isolated gate driver product line, designed specifically for high-reliability, high-speed, reinforced-isolation gate driving in industrial, energy, and transportation power electronics.

FAQ

What is the maximum recommended dead time resistor value for ADUM4221CRIZ-RL?

The ADUM4221CRIZ-RL supports a dead time resistor range of 10 kΩ to 500 kΩ. At 500 kΩ, the resulting dead time is 1809–2831 ns (min–max), as specified in Table 1 of the datasheet. Using a resistor outside this range may cause non-monotonic or out-of-spec dead time behavior. Always verify final dead time with oscilloscope measurement under actual load and temperature conditions for ADUM4221CRIZ-RL.

Does ADUM4221CRIZ-RL support bootstrapped high-side operation?

No, ADUM4221CRIZ-RL does not support bootstrapped high-side operation. It requires fully isolated, independently supplied VDDA and GNDA for the high-side output domain. The datasheet explicitly states that VDDA and GNDA must be referenced to the high-side source/emitter node - meaning a dedicated isolated DC-DC supply or charge pump is required for the high-side rail. ADUM4221CRIZ-RL is designed for true isolated half-bridge drive, not bootstrap configurations.

What is the VIORM rating of ADUM4221CRIZ-RL and why does it matter?

The ADUM4221CRIZ-RL has a VIORM (maximum repetitive peak isolation voltage) of 849 V_peak, per DIN VDE V 0884-11. This rating defines the maximum continuous working voltage the isolation barrier can withstand over its lifetime (20 years). It directly determines the highest system voltage class (e.g., 600 V AC mains, 1000 V DC PV strings) for which ADUM4221CRIZ-RL qualifies as reinforced insulation - critical for safety certification in solar inverters and industrial drives.

Can ADUM4221CRIZ-RL drive both SiC and IGBT gates reliably?

Yes, ADUM4221CRIZ-RL is explicitly qualified for SiC and IGBT gate driving. Its 4 A peak output current, <2 Ω R_DS(ON), and 150 kV/µs CMTI enable fast, robust switching of high-input-capacitance SiC MOSFETs and IGBTs. Figure 21 in the datasheet confirms peak current capability up to 35 V output supply, and the Applications section lists "Gallium nitride (GaN)/silicon carbide (SiC) compatible" and "Isolated IGBT/MOSFET gate drives" as primary use cases for ADUM4221CRIZ-RL.

What happens to ADUM4221CRIZ-RL outputs during VDD1 undervoltage?

When VDD1 falls below its UVLO negative-going threshold (2.3–2.35 V), the ADUM4221CRIZ-RL disables internal logic and forces both VOA and VOB outputs low. This is a safety-critical feature: the default-low behavior prevents unintended power device turn-on during brownout or startup. The datasheet truth table (Table 11) confirms "Low" output state for all combinations when VDD1 is unpowered or below UVLO, ensuring fail-safe operation for ADUM4221CRIZ-RL.