ADUM1447ARWZ-RL7 - Quad-Channel Digital Isolator | Analog Devices
MPN: ADUM1447ARWZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.47 | $8.47 |
| 10 | $7.62 | $76.20 |
| 100 | $6.78 | $678.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.5 | $5,500.00 |
ADUM1447ARWZ-RL7 Overview
A digital isolator is a component that provides galvanic isolation between two circuits while allowing digital signals to pass across the isolation barrier. It uses capacitive or magnetic coupling to transfer data without a direct electrical connection, protecting sensitive electronics from high voltages, ground loops, and noise. Digital isolators are essential in systems where safety, signal integrity, and noise immunity are critical, such as in industrial automation, medical devices, and isolated power supplies.
Key features of the ADUM1447ARWZ-RL7 include its low power consumption (0.6 mA per channel at 3.3 V), high CMTI of 25 kV/µs, and a wide operating temperature range of -40°C to +125°C. The device supports a data rate of 2 Mbps, which is suitable for most control and communication interfaces. It also features a default output state of high when the input power is not applied, ensuring fail-safe operation in safety-critical systems.
Technically, the ADuM1447 uses Analog Devices' iCoupler technology, which employs chip-scale transformers to achieve isolation. This technology provides superior performance compared to optocouplers, including higher data rates, lower power consumption, and better reliability. The device is fully specified over the entire operating range, with propagation delay of 23 ns and pulse width distortion of 3 ns, ensuring accurate signal transmission.
Typical applications include isolated SPI, UART, and I2C interfaces, as well as isolated sensor data acquisition, motor control, and power supply monitoring. The ADUM1447ARWZ-RL7 is particularly suited for battery-powered or energy-harvesting systems where low power is critical.
When designing with this device, ensure that the bypass capacitors are placed close to the VDD1 and VDD2 pins to minimize noise. Also, consider the isolation rating and creepage requirements for your specific application to maintain safety standards.
Drop-in alternatives for ADUM1447ARWZ-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 ADUM1447ARWZ-RL7 (same form factor and footprint) — differing in Package, Supply Voltage (VDD1/VDD2), Propagation Delay, Pulse Width Distortion.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM1447ARWZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.6 / Unit
View Datasheet →ADUM1447ARWZ-RL7
✅ Drop-In✓ In Stock
$5.5 / Unit
View Datasheet →ADUM1447ARWZ-RL7 Specifications
| Number of Channels | 4 |
| Isolation Voltage | 2500 Vrms |
| Data Rate | 2 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Propagation Delay | 23 ns |
| Pulse Width Distortion | 3 ns |
| Supply Voltage (VDD1/VDD2) | 3.0 V to 5.5 V |
| Quiescent Current per Channel | 0.6 mA at 3.3 V |
| Operating Temperature Range | -40°C to +125°C |
| Package | 16-SOIC-W (0.300" width) |
| Mounting Type | Surface Mount |
| Default Output State | High |
| RoHS Status | Compliant |
| Isolation Technology | iCoupler |
ADUM1447ARWZ-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 | VOA — Output channel A |
| Pin 5 | VIB — Input channel B |
| Pin 6 | VOB — Output channel B |
| Pin 7 | VIC — Input channel C |
| Pin 8 | VOC — Output channel C |
| Pin 9 | VID — Input channel D |
| Pin 10 | VOD — Output channel D |
| Pin 11 | GND2 — Ground for side 2 |
| Pin 12 | VDD2 — Supply voltage for side 2 |
| Pin 13 | NC — No connect |
| Pin 14 | NC — No connect |
| Pin 15 | NC — No connect |
| Pin 16 | NC — No connect |
Typical Applications
ADUM1447ARWZ-RL7 is suitable for 6 applications: Industrial Automation, Medical Devices, Isolated Power Supplies, Communication Interfaces, Motor Control, Data Acquisition Systems.
Industrial Automation
The ADUM1447ARWZ-RL7 provides galvanic isolation for industrial control signals, protecting microcontrollers from high-voltage transients and ground loops. With 2500 Vrms isolation and 25 kV/µs CMTI, it ensures reliable communication in noisy factory environments. Its low power consumption (0.6 mA per channel) is ideal for field sensors and actuators. The 2 Mbps data rate supports common industrial protocols like Modbus and CAN. The wide temperature range (-40°C to +125°C) suits harsh industrial conditions.
Recommended
Medical Devices
In medical equipment, patient safety requires galvanic isolation between high-voltage sections and user-accessible parts. The ADUM1447ARWZ-RL7 provides 2500 Vrms isolation, meeting basic insulation requirements. Its low power consumption is beneficial for battery-operated devices like portable monitors. The high CMTI ensures stable operation in the presence of defibrillator discharges or electrosurgical interference. The 2 Mbps data rate is sufficient for vital sign monitoring and data acquisition.
Recommended
Isolated Power Supplies
The ADUM1447ARWZ-RL7 is used in isolated power supply feedback loops to transfer PWM control signals across the isolation barrier. Its 2 Mbps data rate and 23 ns propagation delay allow precise control of switching regulators. The low quiescent current minimizes power loss, improving efficiency. The 2500 Vrms isolation rating ensures safe separation between primary and secondary sides. The device's default high output state provides fail-safe operation in case of power loss.
Recommended
Communication Interfaces
The ADUM1447ARWZ-RL7 isolates UART, SPI, and I2C lines in communication systems, preventing ground loops and noise coupling. Its four channels can isolate multiple signal lines in a single package, saving board space. The 2 Mbps data rate supports standard UART speeds and low-speed SPI. The high CMTI ensures reliable data transmission in electrically noisy environments. The wide supply range (3.0 V to 5.5 V) allows interfacing with various logic levels.
Recommended
Motor Control
In motor drives, the ADUM1447ARWZ-RL7 isolates gate driver signals from the microcontroller, protecting low-voltage logic from high-voltage transients. Its 25 kV/µs CMTI ensures reliable operation in the presence of fast switching noise. The 2 Mbps data rate is sufficient for PWM signals up to 100 kHz. The wide temperature range and low power consumption make it suitable for industrial motor control cabinets. The default high output state prevents unintended motor activation during power-up.
Recommended
Data Acquisition Systems
The ADUM1447ARWZ-RL7 isolates digital data lines between sensors and data acquisition systems, preventing ground loops and noise. Its low power consumption is ideal for remote sensor nodes. The 2 Mbps data rate supports high-speed ADC data transfer. The 2500 Vrms isolation protects sensitive measurement equipment from high common-mode voltages. The device's small SOIC-W package is suitable for space-constrained designs.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1447ARWZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1447ARQZ-RL7 | ADUM1447ARSZ-RL7 | ADUM1447ARWZ |
|---|---|---|---|---|
| Package | 16-SOIC-W | 16-QSOP | 16-SOIC-N | 16-SOIC-W |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 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 | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| Quiescent Current | 0.6 mA/ch | 0.6 mA/ch | 0.6 mA/ch | 0.6 mA/ch |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
Key Differentiators
- Low power consumption (vs ADUM1447ARQZ-RL7)
- Package variety (vs ADUM1447ARSZ-RL7)
- Tape and reel packaging (vs ADUM1447ARWZ)
Design Notes
Place 0.1 µF bypass capacitors close to VDD1 and VDD2 pins to minimize noise. Use a solid ground plane under the device to reduce EMI. Ensure adequate creepage distance between the two sides of the isolation barrier on the PCB to maintain the rated isolation voltage.
The ADUM1447ARWZ-RL7 consumes only 0.6 mA per channel at 3.3 V, making it suitable for low-power designs. However, ensure that the power supply can handle the total current for all channels and any load on the outputs. Use separate supply decoupling for VDD1 and VDD2 to prevent coupling between the two sides.
Do not exceed the absolute maximum ratings for supply voltage (7 V) or input/output voltages. Ensure that the input signals do not exceed the supply voltage. Also, verify that the default output state (high) is acceptable for your application, as it may cause unintended activation of connected circuits during power-up.
Compliance Information
RoHS compliance confirmed by Analog Devices. AEC-Q100 qualification not specified for this part.
