ADUM4221ARWZ - Isolated Half-Bridge Gate Driver | Analog Devices
MPN: ADUM4221ARWZ ✓ 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 Overview
An isolated gate driver is a specialized IC that provides galvanic isolation between the control circuitry and the power stage, allowing safe and reliable switching of high-voltage power devices. It integrates isolation technology, typically using magnetic or capacitive coupling, to transmit control signals across an isolation barrier while preventing harmful voltage transients from reaching the low-voltage control side. This is essential in applications where the power stage operates at high voltages, such as in industrial motor drives, solar inverters, and electric vehicle chargers.
Key features of the ADUM4221ARWZ include a 5 kVrms isolation rating, 100 kV/us common-mode transient immunity (CMTI), and adjustable dead time to prevent shoot-through current. The device also offers a disable pin for output shutdown and a UVLO (undervoltage lockout) function to ensure safe operation during power-up. The 16-lead SOIC package (SOIC-16) provides a compact solution for space-constrained designs.
Technically, the ADUM4221ARWZ uses Analog Devices' iCoupler technology, which combines high-speed CMOS and monolithic transformer isolation. This architecture provides reliable signal transfer with low propagation delay and high noise immunity. The device supports both high-side and low-side drive with independent inputs, allowing flexible control of half-bridge topologies. The adjustable dead time, set via an external resistor, enables optimization of switching losses and prevents cross-conduction.
Typical applications include isolated switch-mode power supplies (SMPS), motor drives, uninterruptible power supplies (UPS), and photovoltaic inverters. The device's high CMTI and fast propagation delay make it ideal for high-frequency switching circuits where signal integrity is critical.
When designing with the ADUM4221ARWZ, ensure proper PCB layout to minimize parasitic inductance and maintain isolation spacing. The input supply should be decoupled with a 0.1 uF capacitor close to the VDD1 pin, and the output supplies should be decoupled with 10 uF electrolytic and 0.1 uF ceramic capacitors. The dead-time resistor should be placed near the DEADTIME pin to minimize noise pickup.
Drop-in alternatives for ADUM4221ARWZ — 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 (same form factor and footprint) — differing in Package, Isolation Voltage, Propagation Delay, Technology, Number of Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM4221ARIZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM4221-2ARIZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM3223ARWZ
✅ 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)
ADUM4221ARWZ Maximum Ratings & Electrical Characteristics
| Isolation Rating | 5 kVrms |
| Peak Output Current | 4 A |
| Input Supply Voltage (VDD1) | 2.5 V to 6.5 V |
| Output Supply Voltage (VDDA/VDDB) | 4.5 V to 35 V |
| Propagation Delay | 60 ns |
| Common-Mode Transient Immunity (CMTI) | 100 kV/us |
| Adjustable Dead Time | Yes (external resistor) |
| Disable Pin | Yes |
| UVLO (Undervoltage Lockout) | Yes |
| Number of Channels | 2 |
| Package | 16-Lead SOIC (SOIC-16) |
| Operating Temperature Range | -40C to +125C |
| Isolation Technology | iCoupler (magnetic) |
| RoHS Status | Compliant |
ADUM4221ARWZ Pin Configuration
| Pin 1 | VDD1 — Input supply voltage (2.5 V to 6.5 V) |
| 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 | DISABLE — Disable pin (active high) |
| Pin 6 | DEADTIME — Dead-time control (external resistor) |
| Pin 7 | GND1 — Input ground |
| Pin 8 | NC — No connect |
| Pin 9 | VDDA — High-side output supply (4.5 V to 35 V) |
| Pin 10 | VOA — High-side gate drive output |
| Pin 11 | GNDA — High-side ground |
| Pin 12 | GNDB — Low-side ground |
| Pin 13 | VOB — Low-side gate drive output |
| Pin 14 | VDDB — Low-side output supply (4.5 V to 35 V) |
| Pin 15 | NC — No connect |
| Pin 16 | GND1 — Input ground |
Typical Applications
ADUM4221ARWZ is suitable for 6 applications: Isolated Switch-Mode Power Supplies (SMPS), Motor Drives, Uninterruptible Power Supplies (UPS), Photovoltaic (PV) Inverters, Electric Vehicle (EV) Chargers, Industrial Power Supplies.
Isolated Switch-Mode Power Supplies (SMPS)
The ADUM4221ARWZ is ideal for isolated SMPS topologies such as half-bridge and full-bridge converters. Its 4 A peak output current and 60 ns propagation delay enable efficient switching of power MOSFETs at high frequencies, reducing transformer size and improving power density. The 5 kVrms isolation ensures safe separation between primary and secondary sides, while the adjustable dead time prevents shoot-through, enhancing reliability. With a wide output supply range of 4.5 V to 35 V, it supports various output voltages. The high CMTI of 100 kV/us ensures stable operation in noisy switching environments, making it a robust choice for industrial power supplies.
Recommended
Motor Drives
In motor drive applications, the ADUM4221ARWZ provides reliable gate drive for IGBTs and MOSFETs in three-phase inverters. Its 4 A peak output current ensures fast switching, reducing switching losses and improving efficiency. The 5 kVrms isolation protects the control circuitry from high-voltage motor transients, while the adjustable dead time prevents shoot-through in half-bridge configurations. The wide output supply range (4.5 V to 35 V) accommodates various motor voltage ratings. With a propagation delay of 60 ns, it maintains precise timing for PWM signals, and the high CMTI of 100 kV/us ensures stable operation in electrically noisy industrial environments, making it suitable for variable frequency drives and servo motors.
Recommended
Uninterruptible Power Supplies (UPS)
The ADUM4221ARWZ is well-suited for UPS systems, where it drives the inverter stage to convert DC to AC. Its 4 A peak output current and 60 ns propagation delay enable efficient switching of IGBTs, ensuring clean AC output. The 5 kVrms isolation provides safety between the battery and mains, while the adjustable dead time prevents cross-conduction in the half-bridge. The wide output supply range (4.5 V to 35 V) supports various battery voltages. The high CMTI of 100 kV/us ensures reliable operation during load transients, and the disable pin allows for safe shutdown during fault conditions, making it a dependable choice for critical power backup systems.
Recommended
Photovoltaic (PV) Inverters
In solar inverters, the ADUM4221ARWZ drives the power stage to convert DC from solar panels to AC for grid connection. Its 4 A peak output current and 60 ns propagation delay enable efficient switching of IGBTs, maximizing energy harvest. The 5 kVrms isolation ensures safety between the PV array and the grid, while the adjustable dead time prevents shoot-through in the inverter bridge. The wide output supply range (4.5 V to 35 V) accommodates varying DC bus voltages. The high CMTI of 100 kV/us ensures stable operation in outdoor environments with high electromagnetic interference, making it a robust choice for residential and commercial solar systems.
Recommended
Electric Vehicle (EV) Chargers
The ADUM4221ARWZ is used in EV chargers to drive the power stage for AC-DC and DC-DC conversion. Its 4 A peak output current and 60 ns propagation delay enable efficient switching of SiC MOSFETs and IGBTs, reducing charging time. The 5 kVrms isolation provides safety between the grid and the vehicle, while the adjustable dead time prevents shoot-through in the converter. The wide output supply range (4.5 V to 35 V) supports various battery voltages. The high CMTI of 100 kV/us ensures reliable operation in high-voltage environments, and the disable pin allows for safe shutdown during faults, making it a critical component for fast and safe EV charging infrastructure.
Recommended
Industrial Power Supplies
In industrial power supplies, the ADUM4221ARWZ provides isolated gate drive for high-voltage power stages. Its 4 A peak output current and 60 ns propagation delay enable efficient switching of MOSFETs and IGBTs, improving power density. The 5 kVrms isolation ensures safety in harsh industrial environments, while the adjustable dead time prevents shoot-through in half-bridge topologies. The wide output supply range (4.5 V to 35 V) supports various output voltages. The high CMTI of 100 kV/us ensures stable operation in electrically noisy factories, and the disable pin allows for safe shutdown during overloads, making it a reliable choice for 24V and 48V industrial power systems.
Recommended
Recommended Products Summary
Engineering reference data for ADUM4221ARWZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM4221ARIZ | ADUM4221-2ARIZ | ADUM3223ARWZ | ADUM3224ARWZ | UCC21520DW | ISO5852SDW |
|---|---|---|---|---|---|---|---|
| Package | 16-Lead SOIC (SOIC-16) | 16-Lead SOIC (SOIC-16) | 16-Lead SOIC (SOIC-16) | 16-Lead SOIC (SOIC-16) | 16-Lead SOIC (SOIC-16) | 16-Lead SOIC (SOIC-16) | 16-Lead SOIC (SOIC-16) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
| Peak Output Current | 4 A | 4 A | 4 A | 4 A | 4 A | 4 A | 2.5 A |
| Isolation Rating | 5 kVrms | 5 kVrms | 5 kVrms | 5 kVrms | 5 kVrms | 5.7 kVrms | 5.7 kVrms |
| Propagation Delay | 60 ns | 60 ns | 60 ns | 60 ns | 60 ns | 30 ns | 110 ns |
| CMTI | 100 kV/us | 100 kV/us | 100 kV/us | 100 kV/us | 100 kV/us | 100 kV/us | 100 kV/us |
| Adjustable Dead Time | Yes | Yes | Yes | Yes | Yes | Yes | No |
| Disable Pin | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Adjustable dead time (vs ISO5852SDW)
- Higher output current (vs ISO5852SDW)
- Faster propagation delay (vs ISO5852SDW)
Design Notes
For optimal performance, place a 0.1 uF ceramic capacitor close to the VDD1 pin and a 10 uF electrolytic capacitor in parallel with a 0.1 uF ceramic capacitor on each output supply (VDDA and VDDB). Ensure the dead-time resistor is placed near the DEADTIME pin to minimize noise pickup. Maintain proper isolation spacing between the input and output sides of the PCB to meet safety standards.
The ADUM4221ARWZ dissipates power primarily during switching. At 4 A peak output, ensure adequate PCB copper area for heat dissipation. The SOIC-16 package has a thermal resistance of approximately 100 C/W (theta_JA). For high-frequency operation, consider adding thermal vias under the package to improve heat transfer to the ground plane.
Do not exceed the absolute maximum ratings for VDD1 (6.5 V) and VDDA/VDDB (35 V). Ensure the dead-time resistor is properly sized to prevent shoot-through. Avoid floating the DISABLE pin; tie it to GND1 if not used. Also, verify that the input signals (VIA, VIB) are within the recommended input voltage range to avoid latch-up.
Compliance Information
RoHS compliant per Analog Devices product page. AEC-Q100 not applicable for this non-automotive grade part.
