ADUM3221ARZ-RL7 - Isolated 4A Dual-Channel Gate Driver | Analog Devices
MPN: ADUM3221ARZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.47 | $1,235.00 |
| 1,000 | $2.2 | $2,200.00 |
Drop-in alternatives for ADUM3221ARZ-RL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM3221BRZ-RL7
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM3221ARZ
✅ Drop-In✓ In Stock
$1.52 / Unit
View Datasheet →ADUM3221TRZ-EP
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM3220ARZ-RL7
✅ Drop-In✓ In Stock
$2.19 / Unit
View Datasheet →Si8261BCC-IP
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM3221ARZ-RL7 Maximum Ratings & Electrical Characteristics
| Technology | iCoupler (magnetic isolation) |
| Number of Channels | 2 |
| Peak Output Current | 4 A |
| Isolation Voltage | 2500 Vrms |
| UVLO Threshold (Nominal) | 4.1 V |
| Propagation Delay (Typical) | 48 ns |
| Minimum Pulse Width | 100 ns |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Output Supply Voltage Range | 4.5 V to 18 V |
| Input Supply Voltage Range | 3.0 V to 5.5 V |
| Package | 8-SOIC (SOIC-8) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40°C to +125°C |
| RoHS Status | Compliant |
| MSL Level | 1 (unlimited) |
ADUM3221ARZ-RL7 Pin Configuration
| Pin 1 | VDD1 — Input supply voltage (3.0V to 5.5V) |
| Pin 2 | VOA — Output A (non-inverting) |
| Pin 3 | GND1 — Input ground |
| Pin 4 | VIA — Input A |
| Pin 5 | VIB — Input B |
| Pin 6 | GND2 — Output ground |
| Pin 7 | VOB — Output B (non-inverting) |
| Pin 8 | VDD2 — Output supply voltage (4.5V to 18V) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADUM3221ARZ-RL7 is suitable for 6 applications: Isolated Switch-Mode Power Supplies, Motor Drives, Solar Inverters, Industrial Automation, Electric Vehicle Charging, Medical Equipment.
Isolated Switch-Mode Power Supplies
The ADUM3221ARZ-RL7 is ideal for isolated SMPS topologies such as flyback and forward converters. Its 4A peak output current can drive the primary-side MOSFET directly, while the 2500Vrms isolation provides the necessary galvanic isolation between the control and power stages. The fast 48ns propagation delay enables high-frequency operation, improving power density and efficiency. The UVLO ensures reliable startup and protection against undervoltage conditions.
Recommended
Motor Drives
In motor drive applications, the ADUM3221ARZ-RL7 provides isolated gate drive for the high-side and low-side MOSFETs or IGBTs in a half-bridge or full-bridge configuration. The dual-channel design simplifies the drive circuit, and the 4A output current ensures fast switching of large power devices. The high CMTI of 25kV/µs prevents false triggering in the presence of motor-induced noise, ensuring reliable operation in industrial environments.
Recommended
Solar Inverters
The ADUM3221ARZ-RL7 is well-suited for solar inverter applications, where isolation between the DC-DC converter and the grid-tie inverter is required. Its 2500Vrms isolation rating meets the safety requirements for photovoltaic systems. The 4A gate drive capability allows efficient switching of high-power IGBTs, while the wide operating temperature range (-40°C to +125°C) ensures reliable performance in outdoor installations.
Recommended
Industrial Automation
In industrial automation, the ADUM3221ARZ-RL7 is used in programmable logic controllers (PLCs) and motor control modules to provide isolated gate drive for power stages. The device's robust isolation and high CMTI ensure reliable operation in electrically noisy factory environments. The compact SOIC-8 package allows for high-density PCB layouts, and the tape and reel packaging (RL7) facilitates automated assembly for high-volume production.
Recommended
Electric Vehicle Charging
The ADUM3221ARZ-RL7 is suitable for electric vehicle (EV) charging systems, including on-board chargers and DC fast chargers. The isolation barrier protects the low-voltage control electronics from the high-voltage battery pack, and the 4A gate drive capability enables efficient switching of high-power SiC or GaN devices. The device's wide temperature range and high reliability make it ideal for automotive-grade applications.
Recommended
Medical Equipment
In medical equipment, the ADUM3221ARZ-RL7 provides isolated gate drive for power supplies in devices such as MRI machines and patient monitors. The 2500Vrms isolation ensures patient safety by preventing electrical leakage between the power and control sections. The low propagation delay and high CMTI contribute to stable operation, while the RoHS compliance meets medical device environmental standards.
Recommended
Recommended Products Summary
Engineering reference data for ADUM3221ARZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM3221BRZ-RL7 | ADUM3221ARZ | ADUM3221TRZ-EP | ADUM3220ARZ-RL7 | Si8261BCC-IP |
|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Silicon Labs |
| Peak Output Current | 4 A | 4 A | 4 A | 4 A | 2 A | 4 A |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| UVLO Threshold (Nominal) | 4.1 V | 7.5 V | 4.1 V | 4.1 V | 4.1 V | 7.5 V |
| Propagation Delay (Typical) | 48 ns | 48 ns | 48 ns | 48 ns | 48 ns | 60 ns |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 35 kV/µs |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -55°C to +150°C | -40°C to +125°C | -40°C to +125°C |
Key Differentiators
- Higher output current (4A) compared to ADUM3220 (2A) (vs ADUM3220ARZ-RL7)
- Lower UVLO threshold (4.1V) compared to ADUM3221BRZ (7.5V) (vs ADUM3221BRZ-RL7)
- Enhanced product (EP) option for extended temperature range (vs ADUM3221TRZ-EP)
Design Notes
Ensure that the input supply (VDD1) and output supply (VDD2) are properly decoupled with at least 0.1µF ceramic capacitors placed as close as possible to the respective pins. For high-current gate drive applications, a 10µF electrolytic capacitor may be needed on VDD2 to handle the transient current demands during switching.
Maintain a clean separation between the input and output grounds (GND1 and GND2) on the PCB to preserve the isolation barrier. Avoid routing high-voltage traces under the device. Use a solid ground plane on the output side to minimize parasitic inductance and ensure stable gate drive.
Do not exceed the absolute maximum ratings for VDD1 (3.0V to 5.5V) and VDD2 (4.5V to 18V). Also, ensure that the dead-time control pin (DT) is properly configured to prevent shoot-through in half-bridge applications. Refer to the datasheet for recommended resistor values for setting dead time.
Compliance Information
RoHS compliant per Analog Devices product page. AEC-Q100 not applicable for this non-automotive grade part.
