Analog Devices Inc. ADUM3224WARZ-RL7

Overview

ADUM3224WARZ-RL7 from Analog Devices is a 4 A peak isolated precision half-bridge gate driver in narrow-body 16-lead SOIC, delivering independent galvanically isolated high-side and low-side outputs with 3000 V_rms isolation, 59 ns max propagation delay, and 5 ns max channel-to-channel matching for IGBT/MOSFET control in switching power supplies and industrial inverters.

For engineers reviewing the ADUM3224WARZ-RL7 datasheet, ADUM3224WARZ-RL7 pinout, ADUM3224WARZ-RL7 application, or ADUM3224WARZ-RL7 equivalent, this page delivers verified technical context, precise timing specs, UVLO grade identification (A/B/C), safety certification details (UL 1577, VDE pending), and real-world gate drive capability under 4.5–18 V output supply and −40°C to +125°C operation.

Technical Context

The ADUM3224WARZ-RL7 integrates iCoupler® monolithic transformer isolation with CMOS input logic (3.3 V–5.5 V) and dual independent output drivers, enabling true galvanic separation between input control and high-voltage gate drive domains. Its architecture supports bootstrapped half-bridge operation with differential voltage tolerance up to 800 V_peak between outputs.

Each channel features secondary-side undervoltage lockout (UVLO) with three selectable thresholds (4.1 V, 6.9 V, or 10.5 V), precise propagation delay matching (<5 ns), and high common-mode transient immunity (>25 kV/µs). The device operates with default-low output behavior and includes a dedicated DISABLE pin asserting low state within 3 µs.

Key Specifications

Pinout & Package

Narrow-body 16-lead SOIC package (7.5 mm × 10.3 mm, 1.27 mm pitch) with creepage/clearance ≥4.0 mm and internal insulation gap ≥0.017 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM4224WARZ-RL7, the ADUM3224WARZ-RL7 offers lower isolation rating but fits narrower PCB layouts; versus SI8233AD-D-IS, it provides tighter timing control and integrated safety features essential for industrial inverters.

Availability

ADUM3224WARZ-RL7 is available at Aetrix Electronics and suitable for switching power supplies, isolated IGBT/MOSFET gate drives, and industrial inverters requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for ADUM3224WARZ-RL7 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 design centers worldwide and over 50 years of innovation in precision signal chain solutions.

The ADuM3224 product line delivers isolated gate drivers optimized for cost-sensitive industrial and commercial power conversion applications, emphasizing reliability, timing precision, and safety certification compliance without sacrificing performance.

FAQ

What is the isolation voltage rating of the ADUM3224WARZ-RL7?

The ADUM3224WARZ-RL7 is rated for 3000 V_rms isolation for 1 minute per UL 1577, with a maximum working insulation voltage (VIORM) of 560 V_peak per DIN V VDE V 0884-10. This narrow-body SOIC variant meets reinforced insulation requirements for applications up to 537 V_peak working voltage relative to input, confirmed in Table 4 and Regulatory Information sections of the Rev. B datasheet.

Does the ADUM3224WARZ-RL7 support bootstrapped half-bridge operation?

Yes, the ADUM3224WARZ-RL7 supports bootstrapped half-bridge operation as explicitly described in the Applications Information section (Page 15). Its independent high-side (VOA/VDDA/GNDA) and low-side (VOB/VDDB/GNDB) output domains allow direct connection to bootstrap circuits, with differential voltage capability up to 800 V_peak between outputs, enabling standard N-channel MOSFET bridge topologies.

What UVLO grade does ADUM3224WARZ-RL7 implement?

The ADUM3224WARZ-RL7 implements the A-grade UVLO with positive-going threshold of 4.1 V and hysteresis of 0.5 V on both VDDA and VDDB supplies, as specified in Tables 1 and 2 of the Rev. B datasheet. This grade prevents gate drive activation during insufficient output supply conditions, ensuring safe power device operation across the full −40°C to +125°C temperature range.

How does the DISABLE pin function on the ADUM3224WARZ-RL7?

The DISABLE pin on the ADUM3224WARZ-RL7 is an active-high control that forces both VOA and VOB outputs to low state within 3 µs of assertion, as defined in Table 13 (Truth Table) and Pin Function Descriptions (Page 10). When deasserted (low), outputs return to their input-driven states within 1 µs, providing deterministic fail-safe behavior for system-level protection schemes.

What is the maximum switching frequency supported by ADUM3224WARZ-RL7?

The ADUM3224WARZ-RL7 supports a maximum data rate of 1 MHz, as stated in the Features list and Switching Specifications (Tables 1 and 2). This corresponds to reliable operation at PWM frequencies up to 1 MHz with 50 ns minimum pulse width and 6–12 ns rise/fall times into 2 nF loads, enabling high-efficiency designs in modern switched-mode power supplies and motor drives.