ADUM1401CRWZ - 4-Ch 90Mbps Digital Isolator 2.5kV | ADI
MPN: ADUM1401CRWZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.89 | $3.89 |
| 10 | $3.42 | $34.20 |
| 100 | $2.95 | $295.00 |
| 500 | $2.61 | $1,305.00 |
| 1,000 | $2.34 | $2,340.00 |
| 3,000 | $2.05 | $6,150.00 |
ADUM1401CRWZ Overview
A digital isolator is an interface IC that transfers logic-level signals across a galvanic isolation barrier using magnetic, capacitive, or optical coupling rather than a direct electrical connection. Digital isolators sit at the boundary between hazardous and safe voltage domains, isolating high-voltage transients (such as motor drive switching edges, grid-line transients, or medical-patient leakage paths) from low-voltage logic that would otherwise be damaged. In the broader component hierarchy, the ADUM1401 belongs to the digital isolator category, which is itself a sub-category of interface ICs and broader signal-conditioning/isolation devices used in power management, motor control, and industrial communication systems.
Key features include 90 Mbps guaranteed data rate (CRWZ grade), 25 kV/µs common-mode transient immunity (CMTI), 32 ns typical propagation delay, 2.7 V to 5.5 V wide supply range on both sides, and per-channel current draw of 1.0 mA at 0-2 Mbps / 31 mA at 100 Mbps at 5 V. Default channel direction is 3-out / 1-in (the ADUM1400 variant reverses to 0-out / 4-in while ADUM1402 swaps mid-channel orientation). The wide-body 16-SOIC (RWZ) package provides the required creepage/clearance for 2500 Vrms reinforced isolation per UL 1577 and IEC 60747-17.
The architecture uses four separate transformer channels monolithically integrated on-chip, driven by an internal oscillator and edge-detect encoder on the primary side and decoded by a comparator/latch network on the secondary side. Refresh pulses are sent periodically to maintain DC correctness, with explicit one-cycle latency per channel direction.
Typical applications include RS-232/RS-485 transceiver isolation, SPI interface isolation between MCU and ADC, isolated gate-drive signal paths in motor drives and solar inverters, industrial 4-20 mA loop isolation, and medical equipment patient-isolation barriers.
Designers should provide 0.1 µF bypass capacitors on each VDD pin placed within 2 mm of the IC, observe wide-body SOIC PCB creepage of at least 8 mm to maintain rated isolation, and consider ADUM1400/ADUM1402 if different default channel orientations are required.
This page synthesizes cross-brand drop-in equivalents, parametric comparison against the ADUM1400/1402 family, and practical PCB creepage/decoupling guidance not consolidated in the manufacturer datasheet.
Drop-in alternatives for ADUM1401CRWZ — 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 ADUM1401CRWZ (same form factor and footprint) — differing in Data Rate, Package, Operating Temperature Range, Channel Directionality, Propagation Delay.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM1401ARWZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.19 / Unit
View Datasheet →ADUM1401BRWZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADUM1400CRWZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADUM1402CRWZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ISO7741FCDW
✅ Drop-In📋 Reference alternative (not in catalog)
ISO7641FCDW
✅ Drop-In📋 Reference alternative (not in catalog)
ACML-7410-500E
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1401CRWZ-RL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADUM1401CRWZ Specifications
| Number of Channels | 4 |
| Channel Direction (Default) | 3-out / 1-in |
| Data Rate | 90 Mbps (CRWZ grade, 0-90 Mbps) |
| Propagation Delay | 32 ns typical |
| Isolation Voltage (rms) | 2500 Vrms |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs minimum |
| Supply Voltage Range (both sides) | 2.7 V to 5.5 V |
| Supply Current per Channel @ 5 V, 0-2 Mbps | 1.0 mA max |
| Supply Current per Channel @ 5 V, 10 Mbps | 3.5 mA max |
| Supply Current per Channel @ 5 V, 100 Mbps | 31 mA max |
| Operating Temperature Range | -40°C to +125°C |
| Package | 16-SOIC (0.295", 7.50 mm Width) - RWZ |
| Mounting Type | Surface Mount |
| Technology | iCoupler (magnetic coupling) |
| Safety Approvals | UL 1577, IEC 60747-17, CSA |
| RoHS Status | Compliant |
ADUM1401CRWZ 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 |
| Pin 4 | VIB — Input channel B, side 1 |
| Pin 5 | VIC — Input channel C, side 1 |
| Pin 6 | VID — Output channel D (3-out/1-in direction maps VID to side 1 output), side 1 |
| Pin 7 | VDD1 — Supply voltage for side 1 (tie to VDD1 pin 1) |
| Pin 8 | GND1 — Ground reference for side 1 |
| Pin 9 | GND2 — Ground reference for side 2 |
| Pin 10 | VDD2 — Supply voltage for side 2 (2.7 V to 5.5 V) |
| Pin 11 | VOD — Input channel D, side 2 |
| Pin 12 | VOC — Output channel C, side 2 |
| Pin 13 | VOB — Output channel B, side 2 |
| Pin 14 | VOA — Output channel A, side 2 |
| Pin 15 | GND2 — Ground reference for side 2 |
| Pin 16 | VDD2 — Supply voltage for side 2 (tie to VDD2 pin 10) |
Typical Applications
ADUM1401CRWZ is suitable for 6 applications: Isolated SPI Interface for MCU-to-ADC Link, Isolated RS-485 / Industrial Fieldbus Communication, Isolated Gate-Drive Signal Paths for Motor Drives and Solar Inverters, Medical Equipment Patient-Isolation Barriers, Isolated 4-20 mA Industrial Current Loop Transmitter, Solar PV String Monitoring and Inverter Communication.
Isolated SPI Interface for MCU-to-ADC Link
The ADUM1401CRWZ is purpose-built for SPI isolation between a host microcontroller and a remote ADC across a 2.5 kV reinforced isolation barrier. Its default 3-out / 1-in channel direction maps naturally to MOSI, SCK, and CS outputs and a single MISO return. With 90 Mbps guaranteed data rate, it supports SPI clocks above 22 MHz; the 32 ns typical propagation delay means only one extra clock cycle of latency. Design tip: tie unused input pins on the secondary side to VDD2 through 10 kΩ or to GND2 through 10 kΩ per datasheet recommendations to prevent false triggering from noise pickup on floating inputs.
Recommended
Isolated RS-485 / Industrial Fieldbus Communication
In RS-485, CAN, Modbus, and Profibus systems, the ADUM1401CRWZ isolates the transceiver IC from the bus-controller MCU, breaking ground loops and protecting logic from ±15 kV ESD and grid-line transients. The 25 kV/µs CMTI rating ensures the isolator does not latch up or corrupt data when the bus side sees fast switching edges from adjacent motor inverters or relays. Its 16-SOIC wide-body footprint provides the 8 mm creepage needed for IEC 61131-2 industrial control certification. For half-duplex RS-485, two channels handle driver-enable and RX/TX switching while the remaining two carry differential data.
Recommended
Isolated Gate-Drive Signal Paths for Motor Drives and Solar Inverters
The ADUM1401CRWZ drives IGBT/MOSFET gate signals in 3-phase motor drives, solar string inverters, and EV traction inverters where the low-voltage MCU domain must remain isolated from the 600-1200 V DC bus. Its 25 kV/µs CMTI withstands the very fast dV/dt edges of SiC MOSFETs switching at 50-100 kHz. The 3-out / 1-in configuration delivers PWM, EN, and FAULT signals to the gate driver while returning a single fault feedback. Pair with isolated gate drivers like ADuM4135 or Si8271 for complete reinforced isolation per IEC 61800-5-1.
Recommended
Medical Equipment Patient-Isolation Barriers
In patient-connected medical devices (ECG, EEG, infusion pumps, blood pressure monitors), the ADUM1401CRWZ provides 2500 Vrms isolation that exceeds the 1500 V AC patient-isolation requirement of IEC 60601-1 for body-protected (BF) and cardiac-protected (CF) applied parts. The wide-body SOIC-16 package is well-suited for compact handheld designs. The high CMTI rating prevents false triggering from fast electrosurgical or defibrillator transients in the operating-room environment. Use the digital isolator alongside an isolated DC-DC converter and isolated op-amp for complete patient-isolated analog signal acquisition.
Recommended
Isolated 4-20 mA Industrial Current Loop Transmitter
The ADUM1401CRWZ isolates the digital section of a 4-20 mA HART or analog current-loop transmitter from the loop side, allowing a low-voltage microcontroller to communicate with the loop driver without exposing the controller to field-side transients. Three channels carry SPI/configuration data and one channel returns loop-side fault or HART signal back to the MCU. The 16-SOIC wide-body footprint simplifies through-hole-replacement of legacy optocoupler-based designs, where PCB land patterns typically already match SOIC-16 footprints. Combined with an isolated DC-DC like LT8491IUKJ, it enables a fully 2.5 kV-reinforced signal chain.
Recommended
Solar PV String Monitoring and Inverter Communication
In string-monitoring units inside 1500 V DC solar inverters, the ADUM1401CRWZ isolates SPI bus traffic between the high-voltage string-monitoring ADC and the low-voltage inverter controller. With 25 kV/µs CMTI, it tolerates the aggressive dV/dt of nearby IGBTs switching at 16-32 kHz. The wide-body 16-SOIC package provides the required creepage at altitude for IEC 62109 solar inverter certification. Three channels drive SDO/SCK/CS while one returns MISO - making the part a perfect pin-compatible swap for optocoupler-based designs in legacy PV monitoring products.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1401CRWZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1401ARWZ | ADUM1401BRWZ | ADUM1400CRWZ | ISO7741FCDW | ISO7641FCDW |
|---|---|---|---|---|---|---|
| Package | 16-SOIC (0.295", 7.50 mm Width) | 16-SOIC (0.295", 7.50 mm Width) - same | 16-SOIC (0.295", 7.50 mm Width) - same | 16-SOIC (0.295", 7.50 mm Width) - same | 16-SOIC (0.295", 7.50 mm Width) - same | 16-SOIC (0.295", 7.50 mm Width) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
| Data Rate | 90 Mbps | 25 Mbps | 10 Mbps | 90 Mbps | 100 Mbps | 25 Mbps |
| Channel Direction | 3-out / 1-in | 3-out / 1-in | 3-out / 1-in | 0-out / 4-in | 3-out / 1-in | 3-out / 1-in |
| Isolation Voltage (rms) | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 3000 Vrms | 3000 Vrms |
| CMTI (minimum) | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Propagation Delay | 32 ns typical | 50 ns typical | 60 ns typical | 32 ns typical | 13 ns typical | 13 ns typical |
| Coupling Technology | iCoupler (transformer) | iCoupler (transformer) | iCoupler (transformer) | iCoupler (transformer) | Capacitive | Capacitive |
| Approximate Unit Price (qty 1) | $3.89 | $3.10 | $2.85 | $3.89 | $3.50 | $2.95 |
Key Differentiators
- Highest speed grade in the ADuM1401 family (vs ADUM1401ARWZ)
- Default channel direction optimized for SPI host-to-peripheral (vs ADUM1400CRWZ)
- iCoupler transformer technology vs capacitive coupling in cross-brand (vs ISO7741FCDW (Texas Instruments))
Design Notes
Critical: place 0.1 µF bypass capacitors on each VDD1/VDD2 pin within 2 mm of the IC body, with traces directly to the corresponding GND pin. The wide-body 16-SOIC package has two VDD1 pins (1, 7) and two GND1 pins (2, 8) - both must be connected to maintain rated isolation. Maintain at least 8 mm creepage between side-1 and side-2 copper pours to preserve 2500 Vrms rating after PCB manufacturing tolerances.
Do not leave unused input pins floating. Per the ADuM1401 datasheet, unused VIA/VIB/VIC inputs must be tied to VDD1 through 10 kΩ or to GND1 through 10 kΩ to prevent false triggering from PCB noise pickup that can corrupt the channel's refresh logic. Similarly tie unused VOA/VOB/VOC outputs to VDD2 or GND2 through 10 kΩ to avoid driving capacitive loads without a defined state.
At data rates above 50 Mbps, place a 33 Ω series resistor on each output pin close to the IC to dampen transmission-line reflections on long PCB traces. Route signal traces as 50 Ω microstrip or stripline with continuous ground reference plane. Estimated: at 90 Mbps with 5 ns edge rates, trace stubs longer than 10 mm can cause 10% overshoot without series termination.
Design the PCB to allow the ADUM1401CRWZ to be replaced by ISO7741FCDW (TI) with no layout changes, in case of Analog Devices supply constraints. Both share the same wide-body 16-SOIC land pattern, pinout, and reinforced isolation rating. However, default channel direction (3-out/1-in) and output drive strength differ slightly - verify in the alternate datasheet before qualification.
Compliance Information
RoHS and REACH compliant per Analog Devices product page. UL 1577 and IEC 60747-17 certified for reinforced insulation. Not AEC-Q100 qualified - for automotive applications, use ADuM1401WTRWZ (automotive grade).
