ADUM1401ARWZ-RL7 - Quad Digital Isolator 1Mbps | Analog Devices
MPN: ADUM1401ARWZ-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 | $2.19 | $2,190.00 |
ADUM1401ARWZ-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. Unlike optocouplers, which use LEDs and photodiodes, iCoupler technology uses monolithic air core transformers and high-speed CMOS to achieve isolation. This results in superior performance characteristics such as higher data rates, lower power consumption, and better reliability. Digital isolators are essential in applications where ground potential differences, noise, or safety requirements demand galvanic isolation, such as in industrial automation, medical equipment, and communication systems.
Key features of the ADUM1401ARWZ-RL7 include its 2500Vrms isolation rating, 1Mbps data rate, and 25kV/µs CMTI. The device operates over a wide temperature range of -40°C to +105°C and is RoHS compliant. The wide-body SOIC-16 package provides adequate creepage and clearance distances for high-voltage isolation. The device also features an enable pin for output control, which can be used to place outputs in a high-impedance state.
Technically, the ADUM1401 uses Analog Devices' iCoupler technology, which integrates micro-transformers on a CMOS die. This architecture eliminates the need for external components and provides a more reliable isolation solution compared to optocouplers. The device has a propagation delay of approximately 100ns and a pulse width distortion of 40ns, ensuring accurate signal transmission. The output default state is HIGH, which is important for safety-critical applications where a fail-safe state is required.
Typical applications include industrial fieldbus isolation, SPI isolation, RS-485 isolation, and general-purpose signal isolation in motor drives, power inverters, and medical devices. The ADUM1401 is particularly suited for applications requiring high reliability and low power consumption.
When designing with this device, ensure proper PCB layout to maintain isolation spacing and place decoupling capacitors close to the VDD pins. Also, consider the default output state (HIGH) when designing fail-safe circuits.
Drop-in alternatives for ADUM1401ARWZ-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 ADUM1401ARWZ-RL7 (same form factor and footprint) — differing in Data Rate, Package, Common-Mode Transient Immunity (CMTI), Operating Temperature Range, Propagation Delay.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM1401ARWZ
✅ Drop-In✓ In Stock
$2.19 / Unit
View Datasheet →ADUM1401ARWZ-RL
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1401CRWZ
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →ADUM1400ARWZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.22 / Unit
View Datasheet →ADUM1402ARWZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ISO7741DW
✅ Drop-In📋 Reference alternative (not in catalog)
ISO6741DW
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1401ARWZ-RL7 Specifications
| Number of Channels | 4 |
| Channel Directionality | 3/1 (3 forward, 1 reverse) |
| Isolation Voltage | 2500 Vrms |
| Data Rate | 1 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Propagation Delay | 100 ns (typical) |
| Pulse Width Distortion | 40 ns (typical) |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Operating Temperature Range | -40°C to +105°C |
| Package | 16-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| Default Output State | HIGH |
| Enable Pin | Yes |
| RoHS Status | Compliant |
| Technology | iCoupler |
ADUM1401ARWZ-RL7 Pin Configuration
| Pin 1 | VDD1 — Input side supply voltage (2.7V to 5.5V) |
| Pin 2 | GND1 — Input side ground |
| Pin 3 | VIA — Input channel A (forward) |
| Pin 4 | VIB — Input channel B (forward) |
| Pin 5 | VIC — Input channel C (forward) |
| Pin 6 | VOD — Output channel D (reverse) |
| Pin 7 | GND1 — Input side ground |
| Pin 8 | NC — No connect |
| Pin 9 | NC — No connect |
| Pin 10 | GND2 — Output side ground |
| Pin 11 | VID — Input channel D (reverse) |
| Pin 12 | VOC — Output channel C (forward) |
| Pin 13 | VOB — Output channel B (forward) |
| Pin 14 | VOA — Output channel A (forward) |
| Pin 15 | GND2 — Output side ground |
| Pin 16 | VDD2 — Output side supply voltage (2.7V to 5.5V) |
Typical Applications
ADUM1401ARWZ-RL7 is suitable for 6 applications: Industrial Fieldbus Isolation, SPI Isolation, RS-485 Isolation, Motor Drive Isolation, Medical Equipment Isolation, Power Inverter Isolation.
Industrial Fieldbus Isolation
The ADUM1401ARWZ-RL7 provides galvanic isolation for industrial fieldbus interfaces such as RS-485, CAN, and PROFIBUS. Its 2500Vrms isolation rating protects sensitive controllers from ground loops and voltage transients in harsh industrial environments. The 1Mbps data rate is sufficient for most fieldbus protocols, and the 25kV/µs CMTI ensures reliable operation in noisy industrial settings. The 3/1 channel directionality accommodates typical transceiver configurations with separate transmit and receive lines. By isolating the bus transceiver from the controller, the ADUM1401 prevents damage from ground potential differences and reduces electromagnetic interference. Its wide supply voltage range (2.7V to 5.5V) allows interfacing with both 3.3V and 5V logic, simplifying system design. The default HIGH output state provides a fail-safe condition in case of power loss, enhancing system safety.
Recommended
SPI Isolation
The ADUM1401ARWZ-RL7 is ideal for isolating SPI buses between microcontrollers and peripheral devices such as ADCs, DACs, or sensors. Its 4 channels with 3/1 directionality perfectly match the SPI signals: SCLK, MOSI, and CS are forward channels, while MISO is the reverse channel. The 1Mbps data rate supports common SPI clock frequencies up to 1MHz, suitable for many data acquisition systems. The 2500Vrms isolation protects the MCU from high-voltage transients on the peripheral side, common in motor control or power monitoring applications. The low propagation delay (100ns) ensures minimal signal skew, maintaining SPI timing integrity. The device operates from 2.7V to 5.5V, allowing level shifting between different logic domains. Its small SOIC-16 package saves board space, and the default HIGH output state ensures a defined logic level when the peripheral is unpowered.
Recommended
RS-485 Isolation
The ADUM1401ARWZ-RL7 can be used to isolate RS-485 transceivers from the controller, providing galvanic isolation to prevent ground loops and protect against voltage surges. With 3/1 channel directionality, it can isolate the DE (driver enable), DI (data in), and RE (receiver enable) signals as forward channels, and RO (receiver out) as the reverse channel. The 1Mbps data rate is adequate for most RS-485 applications, which typically operate at baud rates up to 10Mbps but often use lower speeds for longer cable runs. The 2500Vrms isolation rating meets the requirements for industrial and building automation networks. The high CMTI (25kV/µs) ensures reliable data transmission in electrically noisy environments. The device's wide supply range allows direct interfacing with 3.3V or 5V transceivers. The default HIGH output state ensures a defined idle state on the bus when the controller is unpowered.
Recommended
Motor Drive Isolation
In motor drive systems, the ADUM1401ARWZ-RL7 isolates the low-voltage control circuitry from the high-voltage power stage. It can transmit PWM signals, fault feedback, and enable commands across the isolation barrier. The 2500Vrms isolation rating provides protection against high-voltage transients and ground bounce in the power stage. The 1Mbps data rate is sufficient for PWM frequencies up to 100kHz, which is typical for motor control. The high CMTI (25kV/µs) ensures that fast switching transients do not corrupt the control signals. The device's wide supply voltage range (2.7V to 5.5V) allows interfacing with both 3.3V microcontrollers and 5V gate drivers. The default HIGH output state provides a fail-safe condition, ensuring that the motor drive is disabled if the control signal is lost. The SOIC-16 package is compact and suitable for space-constrained drive modules.
Recommended
Medical Equipment Isolation
The ADUM1401ARWZ-RL7 provides galvanic isolation in medical devices to protect patients and operators from electric shock. It is used to isolate communication interfaces, sensor signals, and control lines between the patient-connected and non-patient-connected sections. The 2500Vrms isolation rating meets the requirements for many medical standards, such as IEC 60601-1 for basic isolation. The 1Mbps data rate is sufficient for transmitting vital sign data, such as ECG, SpO2, and temperature readings. The low propagation delay ensures real-time signal transmission, critical for monitoring applications. The device's wide supply voltage range allows operation from standard 3.3V or 5V rails. The default HIGH output state provides a defined fail-safe condition in case of power failure. The SOIC-16 package is suitable for compact medical devices, and the RoHS compliance meets environmental regulations.
Recommended
Power Inverter Isolation
The ADUM1401ARWZ-RL7 is used in power inverters to isolate control signals from the high-voltage DC bus and AC output stages. It transmits PWM signals, fault indications, and status feedback across the isolation barrier. The 2500Vrms isolation rating provides protection against high-voltage transients and ensures safety in photovoltaic, UPS, and motor drive inverters. The 1Mbps data rate is sufficient for PWM frequencies up to 100kHz, typical for inverter control. The high CMTI (25kV/µs) ensures reliable operation in the presence of fast switching transients. The device's wide supply voltage range (2.7V to 5.5V) allows interfacing with both 3.3V DSPs and 5V gate drivers. The default HIGH output state provides a fail-safe condition, ensuring the inverter shuts down safely if control signals are lost. The SOIC-16 package is compact and suitable for high-density power electronics.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1401ARWZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1401ARWZ | ADUM1401ARWZ-RL | ADUM1401CRWZ | ADUM1400ARWZ | ADUM1402ARWZ | ISO7741DW | ISO6741DW |
|---|---|---|---|---|---|---|---|---|
| Package | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 5000 Vrms | 5000 Vrms |
| Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 90 Mbps | 1 Mbps | 1 Mbps | 100 Mbps | 50 Mbps |
| Channel Directionality | 3/1 | 3/1 | 3/1 | 3/1 | 4/0 | 2/2 | 4/0 | 4/0 |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs | 100 kV/µs |
| Default Output State | HIGH | HIGH | HIGH | HIGH | HIGH | HIGH | HIGH | HIGH |
| Supply Voltage Range | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V |
Key Differentiators
- iCoupler technology provides superior reliability compared to optocouplers (vs Optocoupler-based isolators)
- Lower power consumption than optocoupler alternatives (vs Optocoupler-based isolators)
- Pin-compatible with TI ISO7741 and ISO6741 (vs ISO7741DW, ISO6741DW)
Design Notes
For optimal isolation performance, maintain proper creepage and clearance distances on the PCB. The ADUM1401ARWZ-RL7 in SOIC-16 wide body package requires at least 8mm creepage for 2500Vrms isolation per IPC-2221. Place the isolation barrier (the gap between input and output sides) on the PCB with no copper traces or planes crossing it. Use a slot or cutout under the device to increase creepage distance if needed. Ensure that the PCB material and thickness meet the isolation requirements for your application.
Decouple both supply pins (VDD1 and VDD2) with 0.1µF ceramic capacitors placed as close as possible to the pins. Additionally, use a 10µF bulk capacitor on each side if the supply is shared with other components. The ADUM1401ARWZ-RL7 has a typical quiescent current of 1.3mA per channel, so power dissipation is low, but proper decoupling ensures stable operation and reduces noise coupling across the isolation barrier.
Do not exceed the absolute maximum ratings: supply voltage 7V, input/output voltage -0.5V to VDD+0.5V, and junction temperature 150°C. The default output state is HIGH, so if your application requires a LOW default state, consider using a different variant or adding external pull-down resistors. Also, ensure that the enable pin is properly driven; leaving it floating may cause undefined output states. Refer to the datasheet for the enable pin timing requirements.
Compliance Information
RoHS compliant per Analog Devices product page. AEC-Q100 not applicable as this is not an automotive-grade part.