ADUM1301ARWZ - 3-Ch Digital Isolator 2500Vrms | Analog Devices
MPN: ADUM1301ARWZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.05 | $40.50 |
| 100 | $3.55 | $355.00 |
| 500 | $3.3 | $1,650.00 |
| 1,000 | $3.03 | $3,030.00 |
ADUM1301ARWZ Overview
A digital isolator is a semiconductor device that transfers digital logic states across a galvanic isolation barrier using magnetic, capacitive, or optical coupling rather than a direct electrical connection. Digital isolators sit hierarchically as a sub-category of isolators within the signal conditioning family, which itself belongs to interface ICs and ultimately power management and protection ICs in semiconductor taxonomy. They protect low-voltage microcontrollers and sensitive logic from hazardous high voltages, ground potential differences, and fast transient events on industrial buses, motor drives, and medical equipment. Compared to optocouplers, iCoupler-based parts deliver tighter timing skew, higher CMTI, lower power, and 10x longer operational life.
Key features include a 2.7 V to 5.5 V supply range on both sides of the barrier enabling voltage translation, 100 ns maximum propagation delay (tpLH/tpHL), 40 ns pulse-width distortion, and 2.5 ns typical rise/fall time. The wide-body SOIC-16 package provides the creepage and clearance required to achieve the 2500Vrms working voltage rating per UL and VDE reinforced-insulation standards.
The ADUM1301ARWZ uses three independent transformer channels, each integrating a CMOS encoder/decoder pair, an RF oscillator, and a miniature transformer coil fabricated on-chip. Differential encoding and refresh-on-demand data transmission reject common-mode noise and ensure deterministic propagation delay across temperature.
Typical applications include isolated SPI/UART interfaces for industrial PLCs, isolated gate-drive signaling for IGBT/MOSFET half-bridges, isolated ADC front-ends in motor control, and medical device patient-isolation barriers. The 1 Mbps rating covers most asynchronous serial links and slow synchronous buses. When designing with this device, place 0.1 µF decoupling capacitors on both VDDA/VDDB supply pins within 5 mm of the package, and route the two ground planes on opposite sides of the barrier maintaining at least 7.5 mm creepage per the wide-body SOIC land pattern. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for ADUM1301ARWZ — 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 ADUM1301ARWZ (same form factor and footprint) — differing in Package, Operating Temperature Range, Technology, Number of Channels, Common-Mode Transient Immunity (CMTI).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM1311ARWZ
✅ Drop-In✓ In Stock
$2.25 / Unit
View Datasheet →ADUM1301BRWZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1301CRWZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1401ARWZ
✅ Drop-In✓ In Stock
$2.19 / Unit
View Datasheet →ISO7762FDWR
✅ Drop-In✓ In Stock
$2.74 / Unit
View Datasheet →ISO6731FDWR
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1301ARWZ Specifications
| Isolation Rating | 2500 Vrms |
| Number of Channels | 3 |
| Maximum Data Rate | 1 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Supply Voltage Range (both sides) | 2.7 V to 5.5 V |
| Propagation Delay (tpLH/tpHL) | 100 ns max |
| Pulse-Width Distortion | 40 ns max |
| Rise/Fall Time (typical) | 2.5 ns |
| Channel Configuration | 2/1 (2 forward + 1 reverse) |
| Operating Temperature | -40C to +125C |
| Package | 16-SOIC-W (0.295 inch / 7.50 mm width) |
| Mounting Type | Surface Mount |
| Technology | iCoupler (CMOS + monolithic transformer) |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
ADUM1301ARWZ Pin Configuration
| Pin 1 | VDDA — Power supply, side A (2.7 V to 5.5 V) |
| Pin 2 | VINA — Logic input, channel A (forward to side B) |
| Pin 3 | VOUTB — Logic output, channel B (forward from side A) |
| Pin 4 | VOUTA — Logic output, channel A (forward from side A) |
| Pin 5 | VE1 — Enable 1 input, side A (active high) |
| Pin 6 | GNDA — Ground reference, side A |
| Pin 7 | VE2 — Enable 2 input, side B (active high) |
| Pin 8 | GNDB — Ground reference, side B |
| Pin 9 | VDDB — Power supply, side B (2.7 V to 5.5 V) |
| Pin 10 | VINB — Logic input, channel B (forward to side B) |
| Pin 11 | VINA — Logic input, channel C (forward to side A from side B input) |
| Pin 12 | VOUTC — Logic output, channel C (forward to side A from side B input) |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin 15 | GNDA — Ground reference, side A (duplicate bond pad) |
| Pin 16 | VDDA — Power supply, side A (duplicate bond pad) |
Typical Applications
ADUM1301ARWZ is suitable for 6 applications: Industrial PLC Isolated SPI/UART Interface, Isolated IGBT/MOSFET Gate-Drive Signaling, Isolated ADC Front-End in Motor Control, Medical Device Patient Isolation Barrier, Isolated Power-Supply Control Loop Feedback, Solar Inverter String Monitoring & Communication.
Industrial PLC Isolated SPI/UART Interface
The ADUM1301ARWZ provides three isolated channels ideal for SPI or UART links between a microcontroller and a 24 V industrial fieldbus transceiver in PLC and distributed I/O designs. With 2500 Vrms isolation, the part protects the host MCU from hazardous field-side transients, while 1 Mbps data rate covers UART up to 921600 baud and SPI clocks to 500 kHz. Its 25 kV/µs CMTI rejects the fast common-mode spikes generated by adjacent motor-drive switching, ensuring error-free communication even when the fieldbus cable is several meters long. Place 0.1 µF decoupling on each VDDA/VDDB pin and maintain 7.5 mm creepage under the SOIC body to preserve the 2500 Vrms rating.
Recommended
Isolated IGBT/MOSFET Gate-Drive Signaling
In motor drives and solar inverters, the ADUM1301ARWZ transmits fault, PWM, and enable signals between low-voltage logic and a high-voltage half-bridge gate driver. The 25 kV/µs CMTI is critical here because switched-node dv/dt on the IGBT bridge routinely exceeds 50 kV/µs and would corrupt data in slower isolators. With 100 ns propagation delay and 40 ns pulse-width distortion, the 1301 preserves the timing symmetry required for short-circuit protection desaturation detection. Designers commonly pair it with the ADUM4121ARWZ gate driver to form a fully-isolated half-bridge.
Recommended
Isolated ADC Front-End in Motor Control
Field-oriented control loops sample motor phase currents with a delta-sigma ADC whose SPI output must be galvanically isolated from the MCU ground domain. The ADUM1301ARWZ provides the three channels needed for SCK, DOUT, and DRDY handshake at the 1 Mbps limit of many motor-control ADCs like the AD7403. Its 2500 Vrms barrier protects the MCU from the high-side current-sensing shunt transients, and the 100 ns propagation delay adds only minor latency to the 16 kHz control loop. The wide-body 16-SOIC-W package delivers the creepage needed to satisfy IEC 61800-5-1 reinforced insulation for industrial drives.
Recommended
Medical Device Patient Isolation Barrier
Patient-connected medical equipment - ECG monitors, infusion pumps, and blood-pressure modules - requires 2500 Vrms patient-isolation barriers per IEC 60601-1 to protect against defibrillator transients and mains faults. The ADUM1301ARWZ provides three isolated channels for serial data, enable, and fault signals between the patient-side analog front-end and the host controller. Its iCoupler technology avoids the LED aging that degrades optocouplers in continuous-monitor applications, ensuring stable timing over the device's 10+ year service life. Combined with ADI's AD822x instrumentation amp at the patient side, the 1301 forms a robust ECG/EEG isolation chain.
Recommended
Isolated Power-Supply Control Loop Feedback
In telecom and server DC-DC converters, the ADUM1301ARWZ isolates the primary-side PWM controller from the secondary-side feedback path carrying VID, PGOOD, and sync signals. The 2500 Vrms rating satisfies the reinforced-insulation requirements of 48 V telecom bricks per IEC 62368-1. With 1 Mbps capability and 100 ns propagation, the isolator adds negligible delay to the feedback loop, preserving loop bandwidth. Compared to optocouplers, the iCoupler design eliminates the CTR degradation that drifts loop gain over the converter's lifetime, improving long-term regulation stability.
Recommended
Solar Inverter String Monitoring & Communication
Residential and commercial photovoltaic inverters require isolation between the high-voltage DC string side and the low-voltage AC grid-monitoring and communication ports. The ADUM1301ARWZ provides three isolated channels for fault flags, enable, and serial diagnostic data flowing between the inverter's DSP and the Wi-Fi/Ethernet communication module. The 25 kV/µs CMTI withstands the noisy switching environment of an inverter's IGBT stage, and the wide-body SOIC-16 footprint maintains creepage for the 600 V DC string working voltage. Designers pair the 1301 with a CAN or RS-485 transceiver to form an isolated communication chain to the inverter's gateway.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1301ARWZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1311ARWZ | ADUM1301BRWZ | ADUM1301CRWZ | ADUM1401ARWZ | ISO7762FDWR | ISO6731FDWR |
|---|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
| Package | 16-SOIC-W (RW-16) | 16-SOIC-W (RW-16) - same | 16-SOIC-W (RW-16) - same | 16-SOIC-W (RW-16) - same | 16-SOIC-W (RW-16) - same | 16-SOIC-W (DW-16) - same footprint, verify pinout | 16-SOIC-W (DW-16) - same footprint, verify pinout |
| Number of Channels | 3 (2 forward + 1 reverse) | 3 | 3 | 3 | 4 | 3 | 3 |
| Maximum Data Rate | 1 Mbps | 1 Mbps | 10 Mbps | 90 Mbps | 1 Mbps | 100 Mbps | 25 Mbps |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs | 50 kV/µs |
| Propagation Delay (max) | 100 ns | 100 ns | 50 ns | 24 ns | 100 ns | 13 ns | 18 ns |
| 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 | 2.25 V to 5.5 V | 2.25 V to 5.5 V |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -55C to +125C | -55C to +125C |
| Approx. 1ku Price (USD) | $3.03 | $3.20 (est.) | $3.40 (est.) | $3.95 (est.) | $3.50 (est.) | $2.85 (est.) | $2.40 (est.) |
Key Differentiators
- iCoupler monolithic transformer technology eliminates LED aging (vs Traditional optocouplers (e.g. HCPL-1810))
- Wide-body SOIC provides 2500 Vrms in compact footprint (vs Narrow-body SOIC-16 optocouplers (~500 Vrms))
- 25 kV/µs CMTI withstands fast switching transients (vs Lower-grade isolators at 10-15 kV/µs)
- 2.7 V to 5.5 V dual-side supplies enable voltage translation (vs Fixed 5 V only isolators)
Design Notes
The wide-body 16-SOIC package (0.295 inch width) is essential for achieving the 2500 Vrms rating; do not substitute a narrow-body SOIC-16 (0.150 inch) since creepage drops below 4 mm and the isolation rating falls to ~500 Vrms. Maintain a continuous, uninterrupted slot in the PCB under the SOIC body at least 1 mm wide, and route side-A and side-B copper on opposite PCB layers. Place 0.1 µF X7R decoupling capacitors within 5 mm of VDDA (pin 1) and VDDB (pin 16) with traces short and direct. Keep high-dv/dt signals (gate drives, switching nodes) at least 8 mm away from the SOIC body to prevent field-coupling across the barrier.
Do not float either VDDA or VDDB - the device draws supply current continuously and undefined logic on unpowered outputs can back-power through internal ESD diodes. Both enables VE1 and VE2 must be tied high through 10 kΩ pull-ups if unused; leaving them floating causes undefined output states at power-up. If only one direction of data flow is required, drive the unused input to a defined logic level (not floating) to minimize quiescent current. Avoid using the 1 Mbps grade (A) for signals above 500 kHz - pulse-width distortion grows beyond the spec'd 40 ns and timing margins erode.
Decouple VDDA to GNDA and VDDB to GNDB with separate 0.1 µF X7R capacitors placed within 5 mm of the IC pins, plus a 10 µF bulk capacitor on each supply rail near the isolator. Keep the input and output traces short (under 25 mm) to minimize capacitive coupling across the barrier, which can degrade CMTI. If routing over an internal ground plane, slit the plane beneath the SOIC body to maintain the galvanic isolation - do not bridge side-A and side-B grounds with internal copper. For multi-isolator boards, place each isolator's decoupling local; do not share ceramic capacitors across devices.
Estimated: at 5.5 V supply on both sides and maximum data activity, the ADUM1301ARWZ draws approximately 12 mA per side, dissipating 132 mW total. The 16-SOIC-W has a typical theta_JA of 80 C/W, so junction temperature rise above ambient is ~10.5 C - well within the 125 C limit at 25 C ambient. At 85 C ambient the junction reaches ~95 C, leaving only 30 C margin; for high-temperature industrial designs verify the device junction by thermal probe or estimate from supply current × theta_JA, and reduce data rate if the supply current exceeds the typical value.
Compliance Information
RoHS compliant per Analog Devices product page and DigiKey listing. UL 1577 recognized (2500 Vrms) and IEC 60747-17 reinforced insulation certified per the ADuM1300/1301 datasheet. Not AEC-Q100 qualified; for automotive designs, use the ADuM1301WTRWZ (wide-temp) variant which has automotive-grade screening.
