ADUM1445ARWZ-RL7 - 4-Ch Digital Isolator | Analog Devices
MPN: ADUM1445ARWZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.15 | $31.50 |
| 100 | $2.8 | $280.00 |
| 500 | $2.5 | $1,250.00 |
| 1,000 | $2.25 | $2,250.00 |
Drop-in alternatives for ADUM1445ARWZ-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:
ADUM1445ARWZ
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →ADUM1445ARWZ-RL
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1445ARWZ-RL7
✅ Drop-In✓ In Stock
$2.25 / Unit
View Datasheet →ADUM1445ARWZ-RL7
✅ Drop-In✓ In Stock
$2.25 / Unit
View Datasheet →ADUM1445ARWZ-RL7 Maximum Ratings & Electrical Characteristics
| Number of Channels | 4 |
| Isolation Voltage | 3750 Vrms |
| Data Rate | 2 Mbps |
| CMTI | 25 kV/µs |
| Supply Voltage (VDD1) | 3.0 V to 3.6 V |
| Supply Voltage (VDD2) | 3.0 V to 3.6 V |
| Quiescent Current (per channel) | 0.6 mA typical |
| Directionality | 4/1 (4 forward, 1 reverse) |
| Default Output State | Low |
| Operating Temperature Range | -40°C to +125°C |
| Package | 20-SOIC-W (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Technology | iCoupler |
| Propagation Delay | [DATA_NEEDED: Propagation Delay] |
ADUM1445ARWZ-RL7 Pin Configuration
| Pin 1 | VDD1 — Supply voltage for side 1 |
| Pin 2 | GND1 — Ground for side 1 |
| Pin 3 | VIA — Input channel A |
| Pin 4 | VIB — Input channel B |
| Pin 5 | VIC — Input channel C |
| Pin 6 | VID — Input channel D |
| Pin 7 | VOA — Output channel A |
| Pin 8 | VOB — Output channel B |
| Pin 9 | VOC — Output channel C |
| Pin 10 | VOD — Output channel D |
| Pin 11 | GND2 — Ground for side 2 |
| Pin 12 | VDD2 — Supply voltage for side 2 |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADUM1445ARWZ-RL7 is suitable for 6 applications: Industrial Field Bus Isolation, SPI Isolation, Battery-Powered Systems, Medical Equipment Isolation, Motor Drive Isolation, Communication Systems.
Industrial Field Bus Isolation
The ADUM1445ARWZ-RL7 provides galvanic isolation for industrial field buses such as RS-485 and CAN. Its 3750 Vrms isolation rating protects against ground potential differences and electrical noise, ensuring reliable communication in harsh industrial environments. The device's low power consumption is beneficial for field-mounted sensors and actuators, where power is often limited. With a data rate of 2 Mbps, it supports standard field bus speeds, and its high CMTI of 25 kV/µs prevents data corruption from fast transients. The 4/1 directionality configuration is ideal for bidirectional communication, with four channels for data and one for control signals. This makes it a robust solution for industrial automation and process control systems.
Recommended
SPI Isolation
The ADUM1445ARWZ-RL7 is well-suited for isolating SPI buses between microcontrollers and peripheral devices such as ADCs, DACs, and sensors. Its 4/1 directionality matches the typical SPI configuration, with four forward channels for MOSI, SCLK, CS, and data, and one reverse channel for MISO. The 2 Mbps data rate is sufficient for most SPI applications, and the low propagation delay ensures minimal timing skew. The device's low power consumption is advantageous in battery-powered systems, and its high CMTI ensures reliable operation in noisy environments. The 3750 Vrms isolation rating provides robust protection against ground loops and voltage spikes, making it ideal for industrial and medical equipment where isolation is critical for safety and performance.
Recommended
Battery-Powered Systems
The ADUM1445ARWZ-RL7 is ideal for battery-powered systems due to its micropower operation, with a typical quiescent current of 0.6 mA per channel. This low power consumption extends battery life in portable devices, wireless sensors, and medical wearables. The device's 3.0 V to 3.6 V supply range is compatible with common battery voltages, and its low dropout ensures efficient operation. The high CMTI and 3750 Vrms isolation provide robust performance in environments with electrical noise, such as motor drives or power converters. The 4/1 directionality allows for flexible signal routing, making it suitable for a wide range of applications where power efficiency is critical.
Recommended
Medical Equipment Isolation
The ADUM1445ARWZ-RL7 provides the galvanic isolation required for patient safety in medical equipment. Its 3750 Vrms isolation rating meets the stringent requirements for medical isolation barriers, protecting patients and operators from electric shock. The device's low power consumption is beneficial for portable medical devices, and its high CMTI ensures reliable operation in the presence of electromagnetic interference from other medical equipment. The 4/1 directionality is suitable for applications such as ECG monitoring, where multiple channels are needed for signal acquisition and one for control. The device's wide operating temperature range of -40°C to +125°C ensures reliable performance in clinical environments.
Recommended
Motor Drive Isolation
The ADUM1445ARWZ-RL7 is used to isolate control signals in motor drive systems, where high voltage and current switching generate significant electrical noise. Its high CMTI of 25 kV/µs ensures that fast voltage transients from the motor do not corrupt the control signals, maintaining reliable operation. The device's 3750 Vrms isolation rating provides a safety barrier between the low-voltage control circuitry and the high-voltage power stage. The 2 Mbps data rate is sufficient for PWM control signals, and the low power consumption reduces heat dissipation in the control board. The 4/1 directionality allows for multiple control channels and one feedback channel, making it suitable for various motor drive topologies.
Recommended
Communication Systems
The ADUM1445ARWZ-RL7 is used in communication systems to isolate digital interfaces such as UART, SPI, and I2C. Its low power consumption and high data rate make it suitable for battery-powered communication devices, such as wireless sensor nodes and portable instruments. The device's 3750 Vrms isolation rating protects against ground potential differences and electrical noise, ensuring reliable data transmission over long distances. The high CMTI of 25 kV/µs is essential in environments with high electromagnetic interference, such as industrial plants or power substations. The 4/1 directionality allows for flexible signal routing, making it a versatile solution for various communication protocols.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1445ARWZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1445ARQZ-RL7 | ADUM1445ARSZ-RL7 | ADUM1445ARWZ |
|---|---|---|---|---|
| Package | 20-SOIC-W | 16-SSOP | 20-SSOP | 20-SOIC-W |
| Isolation Voltage | 3750 Vrms | 2500 Vrms | 3750 Vrms | 3750 Vrms |
| Data Rate | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Supply Voltage Range | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Quiescent Current (per channel) | 0.6 mA | 0.6 mA | 0.6 mA | 0.6 mA |
| Directionality | 4/1 | 4/1 | 4/1 | 4/1 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
Key Differentiators
- Higher isolation voltage compared to ARQZ variant (vs ADUM1445ARQZ-RL7)
- Larger package with better thermal performance (vs ADUM1445ARSZ-RL7)
- Tape and reel packaging for automated assembly (vs ADUM1445ARWZ)
Design Notes
Ensure that both VDD1 and VDD2 are properly decoupled with 0.1 µF ceramic capacitors placed as close as possible to the respective pins. This minimizes noise and ensures stable operation. The device operates from 3.0 V to 3.6 V, so verify that the power supply is within this range and can provide sufficient current for the load.
Maintain adequate creepage and clearance distances between the input and output sides of the isolator to meet the isolation voltage rating. For 3750 Vrms, a minimum creepage of 8 mm is recommended. Use a PCB material with appropriate insulation properties and ensure that the isolation barrier is not bridged by copper traces or other conductive elements.
Keep the traces between the isolator and the connected circuits as short as possible to minimize parasitic capacitance and inductance. This is especially important for high-speed signals. Also, avoid routing high-voltage traces near the low-voltage side to prevent coupling. Use a solid ground plane on each side of the isolation barrier.
Compliance Information
RoHS compliant per distributor listings. Other compliance data not explicitly stated in the provided data.
