ADUM1441ARWZ-RL7 - 4-Ch Digital Isolator | Analog Devices
MPN: ADUM1441ARWZ-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 | $2.2 | $2,200.00 |
ADUM1441ARWZ-RL7 Overview
A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass across the isolation barrier. It is essential in applications where ground potential differences, noise, or safety requirements necessitate galvanic isolation. Digital isolators are part of the broader category of isolation components, which also includes optocouplers and magnetic isolators. The iCoupler technology used in this device employs chip-scale transformers to transfer data, offering advantages such as higher speed, lower power consumption, and better reliability compared to optocouplers.
Key features of the ADUM1441ARWZ-RL7 include its micropower operation, with quiescent current typically in the microamp range, making it suitable for battery-powered and energy-efficient designs. The device has a default high output and 3/1 channel directionality, meaning three channels are configured for forward communication and one for reverse. This configuration is ideal for applications requiring bidirectional isolation with a primary data flow. The 2Mbps data rate supports common serial interfaces such as SPI and UART, while the 25kV/µs CMTI ensures reliable operation in noisy industrial environments.
Technically, the ADUM1441ARWZ-RL7 integrates multiple isolation channels in a single package, reducing board space and component count compared to discrete solutions. The iCoupler technology provides precise timing and low propagation delay, which is critical for high-speed data transmission. The device also features a refresh mechanism to maintain output states in the absence of input transitions, ensuring robust operation. The SOIC-W package offers good thermal performance and is compatible with standard PCB assembly processes.
Typical applications include industrial fieldbus communication, isolated SPI interfaces, motor control signal isolation, and medical equipment where patient safety requires galvanic isolation. The low power consumption and small footprint make it ideal for portable and space-constrained designs. In industrial settings, the high CMTI and isolation rating protect sensitive electronics from transient voltages and ground loops.
When designing with this device, ensure that both supply voltages are within the specified range and that decoupling capacitors are placed close to the VDD1 and VDD2 pins. Proper PCB layout is essential to maintain the isolation barrier's integrity and achieve the specified CMTI performance.
Drop-in alternatives for ADUM1441ARWZ-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 ADUM1441ARWZ-RL7 (same form factor and footprint) — differing in Package, Supply Voltage (VDD1/VDD2), Channel Directionality.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM1440ARWZ-RL7
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.1 / Unit
View Datasheet →ADUM1442ARWZ-RL7
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.48 / Unit
View Datasheet →ISO7741DW
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SI8641BB-B-IS1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADUM1441ARWZ-RL7 Specifications
| Number of Channels | 4 |
| Isolation Voltage | 2500 Vrms |
| Data Rate | 2 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Supply Voltage (VDD1) | 3.0 V to 3.6 V |
| Supply Voltage (VDD2) | 3.0 V to 3.6 V |
| Operating Temperature Range | -40°C to +125°C |
| Package | 16-Lead SOIC-W |
| Mounting Type | Surface Mount |
| Channel Directionality | 3/1 (3 forward, 1 reverse) |
| Default Output State | High |
| RoHS Status | Compliant |
| Technology | iCoupler |
ADUM1441ARWZ-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 | VOD — Output channel D (reverse) |
| Pin 7 | GND1 — Ground for side 1 |
| Pin 8 | NC — No connect |
| Pin 9 | NC — No connect |
| Pin 10 | GND2 — Ground for side 2 |
| Pin 11 | VID — Input channel D (reverse) |
| Pin 12 | VOA — Output channel A |
| Pin 13 | VOB — Output channel B |
| Pin 14 | VOC — Output channel C |
| Pin 15 | GND2 — Ground for side 2 |
| Pin 16 | VDD2 — Supply voltage for side 2 |
Typical Applications
ADUM1441ARWZ-RL7 is suitable for 6 applications: Industrial Fieldbus Communication, Isolated SPI Interface, Motor Control Signal Isolation, Medical Equipment Isolation, Isolated Power Supply Feedback, Automotive Battery Management.
Industrial Fieldbus Communication
The ADUM1441ARWZ-RL7 provides galvanic isolation for fieldbus interfaces such as RS-485 and CAN, protecting microcontrollers from ground loops and transient voltages. Its 2500Vrms isolation and 25kV/µs CMTI ensure reliable data transmission in noisy industrial environments. The 2Mbps data rate supports standard fieldbus speeds, while the 3/1 channel configuration accommodates bidirectional communication. Low power consumption is beneficial for bus-powered nodes.
Recommended
Isolated SPI Interface
The ADUM1441ARWZ-RL7 is ideal for isolating SPI buses between microcontrollers and peripheral devices such as ADCs, DACs, or sensors. The 3/1 channel directionality matches the typical SPI signals: SCLK, MOSI, and CS forward, and MISO reverse. The 2Mbps data rate is sufficient for most SPI applications, and the low propagation delay ensures accurate timing. The default high output state provides fail-safe operation if the master is unpowered.
Recommended
Motor Control Signal Isolation
In motor control systems, the ADUM1441ARWZ-RL7 isolates low-voltage control signals from high-voltage power stages. Its high CMTI (25kV/µs) prevents false triggering due to fast switching transients from IGBTs or MOSFETs. The 2Mbps data rate is adequate for PWM and fault signals. The wide operating temperature range (-40°C to +125°C) suits industrial motor drives. The small SOIC-W package saves board space in compact drives.
Recommended
Medical Equipment Isolation
The ADUM1441ARWZ-RL7 provides the galvanic isolation required for patient safety in medical devices. Its 2500Vrms isolation rating meets basic insulation requirements for many medical applications. The low power consumption is critical for battery-operated devices. The default high output state ensures safe operation in case of fault. The device's reliability and long-term stability make it suitable for life-critical monitoring equipment.
Recommended
Isolated Power Supply Feedback
The ADUM1441ARWZ-RL7 can be used to isolate feedback signals in power supply designs, such as voltage and current monitoring. Its 2Mbps data rate is sufficient for control loop feedback, and the high CMTI ensures stable operation despite switching noise. The low quiescent current minimizes power loss in the feedback path. The 3/1 channel configuration allows for both forward control signals and reverse status feedback.
Recommended
Automotive Battery Management
In automotive battery management systems (BMS), the ADUM1441ARWZ-RL7 isolates the high-voltage battery pack from the low-voltage control electronics. Its 2500Vrms isolation and high CMTI ensure reliable communication in the presence of high-voltage switching transients. The wide temperature range (-40°C to +125°C) meets automotive requirements. The low power consumption is beneficial for always-on monitoring circuits.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1441ARWZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1441ARQZ-RL7 | ADUM1441ARSZ-RL7 | ADUM1440ARWZ-RL7 | ISO7741DW |
|---|---|---|---|---|---|
| Package | 16-Lead SOIC-W | 16-Lead QSOP | 16-Lead SOIC-N | 16-Lead SOIC-W | 16-Lead SOIC-W |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 5000 Vrms |
| Data Rate | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 100 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs |
| Channel Directionality | 3/1 | 3/1 | 3/1 | 4/0 | 3/1 |
| Supply Voltage Range | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 2.25V to 5.5V |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -55°C to +125°C |
Key Differentiators
- Micropower operation with low quiescent current (vs ISO7741DW)
- iCoupler technology for reliable isolation (vs SI8641BB-B-IS1)
- Wide operating temperature range (vs ADUM1441ARQZ-RL7)
Design Notes
To maintain the isolation barrier, ensure that the PCB layout provides adequate creepage and clearance distances between the primary and secondary sides. For 2500Vrms isolation, a minimum creepage of 4mm is recommended for basic insulation. Place decoupling capacitors (0.1µF) close to VDD1 and VDD2 pins to reduce noise.
The ADUM1441ARWZ-RL7 operates from 3.0V to 3.6V supplies. Ensure that both VDD1 and VDD2 are within this range and are properly decoupled. The device consumes very low quiescent current, but transient currents during switching should be considered. Use low-ESR ceramic capacitors for decoupling.
Do not exceed the absolute maximum ratings for supply voltage or input/output voltages. The default high output state means that if the input side is unpowered, the outputs will be high, which may cause unintended operation in some systems. Verify that this behavior is acceptable for your application.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
