ADUM1402CRWZ-RL - 4-Ch 90Mbps Digital Isolator SOIC-16 | ADI
MPN: ADUM1402CRWZ-RL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.17 | $5.17 |
| 10 | $4.65 | $46.50 |
| 100 | $4.12 | $412.00 |
| 500 | $3.69 | $1,845.00 |
| 1,000 | $3.25 | $3,250.00 |
ADUM1402CRWZ-RL Overview
What is a digital isolator? A digital isolator is a semiconductor device that transfers logic signals across an isolation barrier while blocking high voltages, galvanically separating grounds between systems. Digital isolators belong to the broader category of signal isolation ICs, which also includes optocouplers (LED + photodiode) and capacitive-coupled isolators. iCoupler technology uses chip-scale transformers with air-core windings, replacing LEDs and photodiodes with magnetic coupling. This eliminates LED degradation, reduces power consumption, improves data-rate capability (Mbps vs Mb), and provides tighter pulse-width distortion than optocouplers. Within the iCoupler family, the ADuM14xx series provides four isolation channels with various directionality options.
Key features of the ADUM1402CRWZ-RL include 32 ns maximum propagation delay (tpLH/tpHL matched), 2 ns maximum pulse-width distortion, 2.5 ns typical rise/fall time, and operation from 2.7 V to 5.5 V on both sides of the barrier enabling voltage translation across isolation. The C grade indicates a 90 Mbps data rate. Low-power operation scales with data rate - 1.0 mA per channel at 0-2 Mbps, 3.5 mA at 10 Mbps, and 31 mA at 100 Mbps equivalent. The 16-pin SOIC-W (RW-16) package supports surface-mount assembly.
The ADUM1402CRWZ-RL is widely used in industrial fieldbus isolation (RS-485, RS-232, CAN, SPI, I2C), motor drive gate-driver signal isolation, medical equipment patient-isolation interfaces, and renewable-energy inverter control. The high CMTI rating allows reliable operation in noisy switching environments where fast-rising common-mode transients would otherwise corrupt data in slower optocouplers.
When designing, observe the recommended decoupling capacitor placement, ensure VDD1 and VDD2 supplies are well regulated (isolated domains), and respect the 16-pin SOIC-W 7.5 mm body footprint to avoid PCB layout errors. This page synthesizes distributor pricing, drop-in alternatives, and practical isolation design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for ADUM1402CRWZ-RL — 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 ADUM1402CRWZ-RL (same form factor and footprint) — differing in Operating Temperature Range, Common-Mode Transient Immunity (CMTI), Package, Data Rate, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM1402CRWZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1402BRWZ
✅ Drop-In✓ In Stock
$4.45 / Unit
View Datasheet →ADUM1402ARWZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1401CRWZ
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →SI8442AB-C-IS
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →ADUM1402CRWZ-RL Specifications
| Isolation Type | Magnetic Coupling (iCoupler) |
| Number of Channels | 4 |
| Channel Directionality | 2 forward / 2 reverse (2/2) |
| Data Rate | 90 Mbps (C grade) |
| Maximum Propagation Delay (tpLH/tpHL) | 32 ns / 32 ns |
| Pulse Width Distortion (Max) | 2 ns |
| Rise / Fall Time (Typ) | 2.5 ns / 2.5 ns |
| Common-Mode Transient Immunity (Min) | 25 kV/µs |
| Withstand Isolation Voltage | 2500 Vrms |
| Supply Voltage Range (both sides) | 2.7 V to 5.5 V |
| Current Consumption @ 5V, 0-2 Mbps | 1.0 mA per channel (max) |
| Current Consumption @ 5V, 10 Mbps | 3.5 mA per channel (max) |
| Current Consumption @ 5V, 100 Mbps | 31 mA per channel (max) |
| Operating Temperature Range | -40C to +105C |
| Package | 16-SOIC (RW-16, 7.50 mm width) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life) |
| RoHS Status | Compliant |
ADUM1402CRWZ-RL Pin Configuration
| Pin 1 | VDD1 — Supply voltage for side 1 (2.7 V to 5.5 V) |
| Pin 2 | GND1 — Ground reference for side 1 |
| Pin 3 | VIA — Input channel A, side 1 (default input) |
| Pin 4 | VIB — Input channel B, side 1 (default input) |
| Pin 5 | VIC — Output channel C, side 1 (default output) |
| Pin 6 | VID — Output channel D, side 1 (default output) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | GND1 — Ground reference for side 1 (alternate ground pin) |
| Pin 9 | GND2 — Ground reference for side 2 (alternate ground pin) |
| Pin 10 | NC — Not connected (per datasheet) |
| Pin 11 | VOD — Input channel D, side 2 (default input) |
| Pin 12 | VOC — Input channel C, side 2 (default input) |
| Pin 13 | VOB — Output channel B, side 2 (default output) |
| Pin 14 | VOA — Output channel A, side 2 (default output) |
| Pin 15 | GND2 — Ground reference for side 2 |
| Pin 16 | VDD2 — Supply voltage for side 2 (2.7 V to 5.5 V) |
Typical Applications
ADUM1402CRWZ-RL is suitable for 6 applications: Industrial Fieldbus Isolation (RS-485 / CAN / SPI), Motor Drive Gate Driver Signal Isolation, Medical Equipment Patient Isolation, Solar Inverter Control Signal Isolation, PLC Digital I/O Module Interface, Switch-Mode Power Supply (SMPS) Feedback Isolation.
Industrial Fieldbus Isolation (RS-485 / CAN / SPI)
The ADUM1402CRWZ-RL provides robust 4-channel isolation for industrial fieldbus interfaces including RS-485 transceivers, CAN bus, and SPI buses operating in factory automation. The 90 Mbps data rate and 32 ns propagation delay support RS-485 at 20 Mbps plus SPI clocks up to 50 MHz. The 2/2 channel directionality is ideal for differential signal pairs with separate TX/RX lines. With 25 kV/µs CMTI, the device tolerates common-mode transients from motor drives and inverters on the same panel. 2500 Vrms isolation safely separates field-side transients from controller logic, meeting IEC 61800-5-1 drive system requirements. The wide 2.7-5.5 V supply range on both sides simplifies integration with 3.3 V MCUs and 5 V transceivers without level shifters.
Recommended
Motor Drive Gate Driver Signal Isolation
The ADUM1402CRWZ-RL isolates gate-driver control inputs from IGBT/MOSFET power stages in industrial motor drives and solar inverters. With 2500 Vrms isolation and 25 kV/µs CMTI, the device prevents high dv/dt switching transients from IGBT bridges from corrupting PWM command signals from the controller. The 2/2 channel directionality handles fault feedback and shutdown signals back to the controller while sending forward PWM, and enable commands. 32 ns propagation delay preserves PWM timing accuracy critical for vector-control algorithms, while 2 ns pulse-width distortion maintains duty-cycle fidelity across the isolation barrier. The 16-SOIC-W 7.5 mm package fits standard gate-driver board layouts in 1.5 kW to 22 kW industrial drives.
Recommended
Medical Equipment Patient Isolation
The ADUM1402CRWZ-RL provides signal-level isolation for medical electronics with patient-connected circuits, including patient monitoring, infusion pumps, and diagnostic imaging interfaces. The 2500 Vrms isolation rating per UL 1577 with low leakage (<1 µA typical) supports patient-protection isolation per IEC 60601-1 for body-connected measurement equipment. The four isolated channels handle ECG front-end signals, alarm outputs, and serial communication between patient-connected modules and host processors. iCoupler technology avoids optocoupler LED aging concerns that would degrade performance over the 10+ year service life typical of medical equipment, while providing tighter pulse-width distortion for accurate analog-to-digital timing references.
Recommended
Solar Inverter Control Signal Isolation
The ADUM1402CRWZ-RL isolates control signals between low-voltage MCU/FPGA controllers and high-voltage power stages in photovoltaic inverters, where DC bus voltages reach 600 V to 1500 V. With 25 kV/µs CMTI and 2500 Vrms isolation, the device maintains data integrity in the presence of fast-switching IGBT transients from the inverter bridge. The four channels isolate PWM commands, AC grid-sense feedback, and protection signals between the isolated gate-driver board and the controller board. Wide 2.7-5.5 V supply compatibility on both sides allows direct connection to 3.3 V MCUs and 5 V gate drivers without external level shifters, reducing BOM cost and PCB complexity in residential and commercial string inverters.
Recommended
PLC Digital I/O Module Interface
The ADUM1402CRWZ-RL provides channel isolation between PLC backplane logic and field-side I/O in modular Programmable Logic Controllers. The 2/2 channel directionality supports mixed input/output modules where two channels read 24V field inputs and two channels drive field actuators, all within one 16-pin SOIC. The 90 Mbps speed grade enables high-speed counter inputs and pulse-train output channels for motion-control PLCs. 2500 Vrms isolation meets IEC 61131-2 requirements for industrial control equipment, providing reliable separation between the 24V field wiring and the 5V/3.3V backplane. The SOIC-16 7.5 mm package is the industry-standard footprint for PLC I/O isolation, simplifying layout across input, output, and mixed I/O module variants.
Recommended
Switch-Mode Power Supply (SMPS) Feedback Isolation
The ADUM1402CRWZ-RL isolates primary-side controller from secondary-side feedback signals in isolated AC-DC and DC-DC converters, including server PSUs and industrial DIN-rail power supplies. With 2/2 channel directionality, two channels handle primary-to-secondary PWM/Enable commands while two channels return secondary-to-primary feedback (opto-coupler replacement, voltage-sense, and sync-rect timing). 90 Mbps data rate supports high-frequency digital feedback loops in LLC and phase-shift full-bridge converters, while 32 ns propagation delay preserves control loop phase margin. The 25 kV/µs CMTI rejects high dv/dt noise from primary-side MOSFET switching, replacing traditional optocouplers with superior aging and temperature stability.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1402CRWZ-RL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1402CRWZ | ADUM1402BRWZ | ADUM1402ARWZ | ADUM1401CRWZ | SI8442AB-C-IS |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Silicon Labs |
| Package | SOIC-16 (RW-16, 7.5 mm) | SOIC-16 (RW-16, 7.5 mm) - same | SOIC-16 (RW-16, 7.5 mm) - same | SOIC-16 (RW-16, 7.5 mm) - same | SOIC-16 (RW-16, 7.5 mm) - same | SOIC-16 (RW-16, 7.5 mm) - same |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Channel Directionality | 2/2 | 2/2 | 2/2 | 2/2 | 3/1 | 2/2 |
| Data Rate (Max) | 90 Mbps (C grade) | 90 Mbps (C grade) | 25 Mbps (B grade) | 1 Mbps (A grade) | 90 Mbps (C grade) | 1 Mbps |
| Propagation Delay (Max) | 32 ns | 32 ns | 50 ns | 100 ns | 32 ns | 60 ns |
| Pulse-Width Distortion (Max) | 2 ns | 2 ns | 5 ns | 40 ns | 2 ns | 10 ns |
| CMTI (Min) | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 20 kV/µs |
| Withstand Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
Key Differentiators
- Highest data rate in the ADuM1402 family (vs ADUM1402ARWZ)
- Balanced 2/2 bidirectional channel configuration (vs ADUM1401CRWZ)
- 25 kV/µs CMTI for noisy switching environments (vs SI8442AB-C-IS (Silicon Labs))
Design Notes
Decouple both VDD1 and VDD2 with 0.1 µF low-ESR ceramic capacitors placed within 2 mm of each supply pin. According to the ADuM140x datasheet, inadequate decoupling can cause logic errors at high data rates because the iCoupler transformer draws high transient currents during edge transitions. For multi-channel operation, add a 1 µF bulk decoupling capacitor on each supply domain. Power-up sequencing is not required - either supply may come up first - though both supplies must be present within 1 ms of each other for valid output states.
Maintain at least 4 mm clearance under the ADUM1402CRWZ-RL between primary-side and secondary-side copper pours to preserve the 2500 Vrms isolation rating. According to UL 1577 spacing requirements, the package body and lead spacing establish the basic insulation distance; PCB contamination or solder flux residue can degrade creepage in humid environments. For medical or reinforced-isolation applications, add a slot in the board between the two ground domains to increase creepage distance to 8 mm minimum.
Place the ADUM1402CRWZ-RL as close as possible to the isolation barrier to minimize the loop area of high-frequency return currents. According to iCoupler design guidelines, route input/output traces on the respective sides without crossing the isolation barrier. Keep high-speed digital traces on the outer PCB layers referenced to a continuous ground plane on the adjacent inner layer. For SPI buses above 25 MHz, add source-series termination at the driver output to control ringing across the isolation barrier.
Do not load VOA/VOB/VOC/VOD outputs beyond the datasheet current rating, as this can cause permanent damage to the iCoupler output drivers. According to the ADuM140x datasheet, output drive capability is 4 mA source and 4 mA sink at 5 V VDD - insufficient for directly switching relays or LEDs. Use a buffer such as AD8534ARZ or a gate driver downstream of the isolator for power load switching. Also avoid leaving unused input channels floating - tie them to VDD or GND through 10 kΩ resistors to prevent false triggering from capacitive coupling.
Compliance Information
RoHS and REACH compliant per Analog Devices product page. UL 1577 recognized at 2500 Vrms. Not AEC-Q100 qualified - for automotive isolation select ADuM1402W/ADuM1401W automotive-grade variants.
