ADUM1420ARWZ-RL7 - Quad Digital Isolator 2500Vrms | Analog Devices
MPN: ADUM1420ARWZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.15 | $31.50 |
| 100 | $2.8 | $280.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.1 | $2,100.00 |
ADUM1420ARWZ-RL7 Overview
Digital isolators are components that transfer digital signals across an isolation barrier, preventing DC current flow while allowing AC signals to pass. They are essential in applications requiring safety isolation, ground loop elimination, and level shifting. The ADUM1420 uses monolithic air core transformers and CMOS technology, offering superior performance compared to optocouplers, including higher speed, lower power, and better reliability.
Key features include four independent isolation channels, a wide supply voltage range of 3.0V to 5.5V, and a maximum data rate of 1Mbps. The device operates over the industrial temperature range of -40°C to +125°C. Its high common-mode transient immunity of 25kV/µs ensures reliable operation in noisy environments.
The ADUM1420's architecture uses iCoupler technology, which integrates micro-transformers on a CMOS die, eliminating the need for LEDs and photodiodes. This results in lower power consumption, higher data rates, and longer lifespan compared to optocouplers. The device also features a default output state that is high when the input power is off, ensuring fail-safe operation.
Typical applications include industrial field bus isolation, SPI isolation, RS-232/RS-485 isolation, and general-purpose digital isolation in motor drives, power inverters, and medical equipment. The wide supply range and robust isolation make it suitable for both 3.3V and 5V systems.
When designing with the ADUM1420, ensure proper PCB layout with adequate creepage and clearance distances for the isolation barrier. Bypass capacitors should be placed close to the VDD pins to minimize noise. The device is RoHS compliant and lead-free.
Drop-in alternatives for ADUM1420ARWZ-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 ADUM1420ARWZ-RL7 (same form factor and footprint) — differing in Data Rate, Isolation Voltage, Number of Channels, Default Output State, Output Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM1400ARWZ-RL
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1401ARWZ-RL
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ADUM1402ARWZ-RL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADUM141D1BRWZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
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View Datasheet →ADUM141D0BRWZ
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View Datasheet →ADUM141D2BRWZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
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View Datasheet →ADUM1420ARWZ-RL7 Specifications
| Number of Channels | 4 |
| Isolation Voltage | 2500 Vrms |
| Data Rate | 1 Mbps |
| Common Mode Transient Immunity | 25 kV/µs |
| Supply Voltage Range | 3.0 V to 5.5 V |
| Operating Temperature Range | -40°C to +125°C |
| Package | 16-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| Output Type | Digital |
| Technology | iCoupler |
| RoHS Status | Compliant |
| Lead Free | Yes |
ADUM1420ARWZ-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 | GND1 — Ground for side 1 |
| Pin 8 | NC — No connect |
| Pin 9 | VOD — Output channel D |
| Pin 10 | VOC — Output channel C |
| Pin 11 | VOB — Output channel B |
| Pin 12 | VOA — Output channel A |
| Pin 13 | GND2 — Ground for side 2 |
| Pin 14 | VDD2 — Supply voltage for side 2 |
| Pin 15 | NC — No connect |
| Pin 16 | NC — No connect |
Typical Applications
ADUM1420ARWZ-RL7 is suitable for 6 applications: Industrial Field Bus Isolation, SPI Isolation, RS-232/RS-485 Isolation, Motor Drive Isolation, Medical Equipment Isolation, Power Inverter Isolation.
Industrial Field Bus Isolation
The ADUM1420ARWZ-RL7 provides galvanic isolation for industrial field buses such as RS-485 and CAN. Its 2500Vrms isolation and 25kV/µs CMTI ensure reliable communication in noisy factory environments. The 1Mbps data rate is sufficient for most field bus protocols, and the wide supply range allows direct interface with 3.3V or 5V controllers. The device's high CMTI prevents data corruption from motor transients and other EMI sources, making it ideal for PLCs, motor drives, and process control systems.
Recommended
SPI Isolation
The ADUM1420ARWZ-RL7 can isolate SPI signals between a microcontroller and peripheral devices such as ADCs, DACs, or sensors. With four channels, it can carry MOSI, MISO, SCK, and CS signals across the isolation barrier. The 1Mbps data rate is adequate for many SPI applications, though higher-speed alternatives exist. The device's low propagation delay and high CMTI ensure accurate data transfer even in electrically noisy environments. This is commonly used in industrial data acquisition systems and motor control.
Recommended
RS-232/RS-485 Isolation
The ADUM1420ARWZ-RL7 is used to isolate RS-232 or RS-485 communication lines in industrial and medical equipment. Its 2500Vrms isolation protects sensitive electronics from ground loops and voltage spikes. The 1Mbps data rate supports standard baud rates up to 115200 and beyond. The device's high CMTI ensures error-free communication in environments with fast transients, such as motor drives and power converters. It is often paired with transceivers like the ADM2483 for complete isolation solutions.
Recommended
Motor Drive Isolation
In motor drives, the ADUM1420ARWZ-RL7 isolates control signals from the high-voltage power stage. Its 2500Vrms isolation and 25kV/µs CMTI protect the low-voltage controller from switching transients. The 1Mbps data rate is sufficient for PWM control signals and fault feedback. The device's wide operating temperature range (-40°C to +125°C) ensures reliable operation in harsh industrial environments. It is commonly used in variable frequency drives, servo drives, and robotics.
Recommended
Medical Equipment Isolation
The ADUM1420ARWZ-RL7 provides patient isolation in medical devices such as patient monitors, infusion pumps, and diagnostic equipment. Its 2500Vrms isolation meets safety standards for medical applications. The device's low power consumption and high reliability make it suitable for battery-powered devices. The 1Mbps data rate is adequate for transmitting vital sign data and control signals. The device's small SOIC package saves board space in compact medical devices.
Recommended
Power Inverter Isolation
The ADUM1420ARWZ-RL7 is used in solar inverters and UPS systems to isolate control electronics from the high-voltage DC bus. Its 2500Vrms isolation and high CMTI ensure reliable operation in the presence of fast switching transients. The 1Mbps data rate is sufficient for gate drive signals and status monitoring. The device's wide temperature range and robust design make it ideal for outdoor and industrial installations. It helps prevent ground loops and improves system safety.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1420ARWZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1400ARWZ-RL | ADUM1401ARWZ-RL | ADUM1402ARWZ-RL |
|---|---|---|---|---|
| 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) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Supply Voltage Range | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V |
| Channel Configuration | 2 forward, 2 reverse | 4 forward | 3 forward, 1 reverse | 2 forward, 2 reverse |
| Default Output State | High | High | High | High |
Key Differentiators
- iCoupler technology provides superior reliability and performance compared to optocouplers (vs Optocoupler-based isolators)
- High common-mode transient immunity of 25kV/µs (vs ADUM1400ARWZ-RL)
- Wide supply voltage range of 3.0V to 5.5V (vs ADUM1400ARWZ-RL)
Design Notes
For optimal performance, place bypass capacitors (0.1µF and 10µF) close to the VDD1 and VDD2 pins. Ensure a solid ground plane on both sides of the isolation barrier. Maintain adequate creepage and clearance distances between the two sides to meet safety standards.
Keep the isolation barrier clear of copper traces and components to avoid reducing the isolation rating. Use a slot or cutout in the PCB under the device to increase creepage distance if needed. Route high-voltage traces away from low-voltage side to minimize coupling.
Do not exceed the absolute maximum supply voltage of 7V on either side. Ensure that the input signals do not exceed the supply voltage. When using the device in high-CMTI environments, verify that the PCB layout minimizes parasitic capacitance across the isolation barrier to maintain the specified transient immunity.
Compliance Information
RoHS compliant and lead-free per manufacturer. Other compliance details not specified in the provided data.