ADUM4221ARWZ-RL7 - Isolated Half-Bridge Gate Driver | Analog Devices
MPN: ADUM4221ARWZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
ADUM4221ARWZ-RL7 Overview
An isolated gate driver is a specialized integrated circuit that provides the necessary voltage and current to switch power transistors while maintaining galvanic isolation between the control side and the power stage. This isolation is critical for safety and noise immunity in applications such as motor drives, switch-mode power supplies, and inverters. The ADUM4221 integrates isolation and drive functions into a single package, eliminating the need for external isolation components like pulse transformers.
Key features of the ADUM4221 include 4 A peak output current, adjustable dead time, and a wide supply voltage range. The device supports both high-side and low-side outputs with independent control, enabling flexible half-bridge configurations. Its propagation delay is typically 60 ns, and it offers a common-mode transient immunity of 100 kV/us, ensuring reliable operation in noisy environments.
Technically, the ADUM4221 uses Analog Devices' iCoupler technology, which combines high-speed CMOS and monolithic transformer isolation. This architecture provides superior performance compared to traditional optocoupler-based solutions, including lower power consumption, higher data rates, and better timing accuracy. The device also features under-voltage lockout (UVLO) on both the input and output sides, protecting against insufficient supply voltages.
Typical applications include isolated switch-mode power supplies, motor drives, solar inverters, and industrial automation. The ADUM4221 is particularly suited for half-bridge and full-bridge topologies where high-side and low-side drivers are required. Its adjustable dead time allows designers to optimize switching performance and prevent shoot-through currents.
When designing with the ADUM4221, it is important to ensure proper PCB layout to minimize parasitic inductance and maintain signal integrity. The device's high common-mode transient immunity requires careful attention to grounding and isolation barriers. Additionally, the dead time should be set appropriately based on the switching characteristics of the power transistors to avoid cross-conduction.
Drop-in alternatives for ADUM4221ARWZ-RL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADUM4221ARWZ-RL7 (same form factor and footprint) — differing in Package, Isolation Voltage, Technology, Propagation Delay, Number of Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM4221BRWZ-RL7
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →ADUM3223ARWZ-RL7
✅ Drop-In✓ In Stock
$2.19 / Unit
View Datasheet →ADUM3224ARWZ
✅ Drop-In✓ In Stock
$2.2 / Unit
View Datasheet →UCC21520DW
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ISO5852SDW
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SI8271GB-IS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADUM4221ARWZ-RL7 Maximum Ratings & Electrical Characteristics
| Technology | iCoupler |
| Number of Channels | 2 |
| Peak Output Current | 4 A |
| Isolation Voltage | 5000 Vrms |
| Propagation Delay | 60 ns (typical) |
| Common-Mode Transient Immunity | 100 kV/us |
| Supply Voltage Range | 4.5 V to 18 V |
| Dead Time | Adjustable |
| Package | 16-lead SOIC |
| Operating Temperature Range | -40C to +125C |
| Under-Voltage Lockout (UVLO) | Yes (input and output) |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
| Output Configuration | High-side and low-side |
| Isolation Rating | 5000 Vrms |
ADUM4221ARWZ-RL7 Pin Configuration
| Pin 1 | VDD1 — Input supply voltage |
| Pin 2 | GND1 — Input ground |
| Pin 3 | VIA — Input signal for high-side driver |
| Pin 4 | VIB — Input signal for low-side driver |
| Pin 5 | DT — Dead time control |
| Pin 6 | GND1 — Input ground |
| Pin 7 | NC — No connect |
| Pin 8 | NC — No connect |
| Pin 9 | VDD2 — Output supply voltage |
| Pin 10 | VOA — High-side output |
| Pin 11 | GND2 — Output ground |
| Pin 12 | VOB — Low-side output |
| Pin 13 | GND2 — Output ground |
| Pin 14 | NC — No connect |
| Pin 15 | NC — No connect |
| Pin 16 | GND1 — Input ground |
Typical Applications
ADUM4221ARWZ-RL7 is suitable for 6 applications: Isolated Switch-Mode Power Supplies, Motor Drives, Solar Inverters, Industrial Automation, Electric Vehicle Chargers, Uninterruptible Power Supplies (UPS).
Isolated Switch-Mode Power Supplies
The ADUM4221ARWZ-RL7 is ideal for isolated switch-mode power supplies (SMPS) where high-side and low-side MOSFETs need isolated drive signals. Its 4 A peak output current ensures fast switching, while the 5000 Vrms isolation provides safety and noise immunity. The adjustable dead time prevents shoot-through, improving efficiency and reliability. The wide supply voltage range (4.5 V to 18 V) accommodates various control ICs, and the 100 kV/us CMTI ensures stable operation in noisy power environments.
Recommended
Motor Drives
In motor drive applications, the ADUM4221ARWZ-RL7 provides isolated gate drive for the high-side and low-side switches of a half-bridge inverter. Its 4 A peak output current drives large MOSFETs and IGBTs, while the adjustable dead time optimizes switching to minimize losses and prevent cross-conduction. The 5000 Vrms isolation protects the control circuitry from high-voltage transients, and the 100 kV/us CMTI ensures reliable operation in electrically noisy industrial environments.
Recommended
Solar Inverters
The ADUM4221ARWZ-RL7 is well-suited for solar inverters, where isolated gate drive is essential for the half-bridge or full-bridge topology. Its 4 A peak output current enables efficient switching of power MOSFETs and IGBTs, while the adjustable dead time reduces switching losses and prevents shoot-through. The high isolation voltage (5000 Vrms) ensures safety in high-voltage DC bus systems, and the wide operating temperature range (-40C to +125C) supports outdoor installations.
Recommended
Industrial Automation
In industrial automation, the ADUM4221ARWZ-RL7 provides isolated gate drive for power stages in PLCs, robotics, and factory equipment. Its 4 A peak output current drives various power switches, while the adjustable dead time ensures reliable operation in half-bridge configurations. The 5000 Vrms isolation protects sensitive control logic from high-voltage transients, and the 100 kV/us CMTI ensures stable operation in harsh electromagnetic environments.
Recommended
Electric Vehicle Chargers
The ADUM4221ARWZ-RL7 is used in electric vehicle (EV) chargers to drive the power switches in the AC-DC and DC-DC conversion stages. Its 4 A peak output current enables efficient switching of high-power MOSFETs and IGBTs, while the adjustable dead time optimizes performance and reduces losses. The 5000 Vrms isolation provides safety in high-voltage systems, and the wide operating temperature range supports automotive-grade requirements.
Recommended
Uninterruptible Power Supplies (UPS)
In UPS systems, the ADUM4221ARWZ-RL7 provides isolated gate drive for the inverter stage, ensuring reliable switching of power transistors. Its 4 A peak output current and adjustable dead time enhance efficiency and prevent shoot-through. The high isolation voltage (5000 Vrms) protects control electronics from high-voltage DC bus, and the 100 kV/us CMTI ensures stable operation during transient events.
Recommended
Recommended Products Summary
Engineering reference data for ADUM4221ARWZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM4221BRWZ-RL7 | ADUM3223ARWZ-RL7 | ADUM3224ARWZ | UCC21520DW |
|---|---|---|---|---|---|
| Package | 16-lead SOIC | 16-lead SOIC | 16-lead SOIC | 16-lead SOIC | 16-lead SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Peak Output Current | 4 A | 4 A | 4 A | 4 A | 4 A |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms |
| Propagation Delay | 60 ns | 60 ns | 60 ns | 60 ns | 30 ns |
| Common-Mode Transient Immunity | 100 kV/us | 100 kV/us | 100 kV/us | 100 kV/us | 100 kV/us |
| Adjustable Dead Time | Yes | Yes | No | No | Yes |
| Supply Voltage Range | 4.5 V to 18 V | 4.5 V to 18 V | 4.5 V to 18 V | 4.5 V to 18 V | 4.5 V to 18 V |
Key Differentiators
- Adjustable dead time (vs ADUM3223ARWZ-RL7)
- Higher isolation voltage (vs ADUM3221ARZ-RL7)
- 16-lead SOIC package (vs ADUM3221ARZ-RL7)
Design Notes
Ensure proper PCB layout to minimize parasitic inductance and maintain signal integrity. Place the gate driver close to the power switches and use short, wide traces for gate drive signals. Add decoupling capacitors (0.1 uF and 10 uF) close to the VDD1 and VDD2 pins to filter noise and provide stable supply.
The ADUM4221ARWZ-RL7 can dissipate significant power when driving large capacitive loads at high frequencies. Ensure adequate thermal management by providing a copper pour under the device and using thermal vias to the ground plane. Monitor junction temperature to stay within the -40C to +125C operating range.
Set the dead time appropriately to prevent shoot-through currents in half-bridge configurations. Use the DT pin to adjust dead time based on the switching characteristics of the power transistors. Also, ensure that the UVLO thresholds are compatible with your supply voltages to avoid unintended operation.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified; for automotive applications, verify with manufacturer.
