ADUM1301ARWZ-RL - 3-Ch 1Mbps Digital Isolator SOIC-16 | ADI
MPN: ADUM1301ARWZ-RL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.33 | $7.33 |
| 10 | $6.62 | $66.20 |
| 100 | $5.59 | $559.00 |
| 500 | $4.71 | $2,355.00 |
| 1,000 | $3.78 | $3,780.00 |
| 2,500 | $3.18 | $7,950.00 |
ADUM1301ARWZ-RL Overview
What is a digital isolator? A digital isolator is a semiconductor device that transfers logic signals across an galvanically isolated barrier using chip-scale transformers (iCoupler), capacitive coupling, or GMR/Optocoupler methods, replacing legacy optocouplers with integrated CMOS drivers and receivers. Digital isolators belong to the broader hierarchy: digital isolator -> isolator -> interface IC -> signal chain IC -> semiconductor. Compared to optocouplers, iCoupler devices eliminate LED aging, slow propagation, and CTR degradation, while integrating multiple isolation channels and voltage translation in a single small-outline IC.
Key features of the ADUM1301ARWZ-RL include a wide supply operation from 2.7 V to 5.5 V on either side, low default output low-high logic, and high channel-to-channel matching. The three-channel architecture is configured as 2 input/1 output or 1 input/2 output in the same RW-16 footprint, selectable via part-number suffix (ARW/ARWZ = 2/1 channels direction; BRW/BRWZ = 1/2 channels direction). The wide-body SOIC-16 footprint ensures 8 mm minimum creepage/clearance for reinforced insulation applications.
The iCoupler architecture monolithically integrates planar transformers and CMOS logic on a single die, achieving propagation delay around 32-100 ns and pulse-width distortion below 40 ns. Channel-to-channel matching is typically within 5 ns, enabling reliable multi-channel timing-critical applications like isolated SPI between a microcontroller and a gate driver. The device also provides 5 kV human-body-model ESD protection on all pins.
Typical applications include isolated SPI between a low-voltage MCU and a high-side gate driver in motor drives and solar inverters, isolated RS-485/RS-232 transceivers for industrial fieldbus, isolated DAC/ADC signal transmission, and medical equipment patient connections. The wide-body SOIC and 2500 Vrms rating also suit solar charge controllers and battery management systems. The -RL reel suffix is preferred for high-volume automated SMT assembly.
When designing with this device, place 0.1 µF bypass capacitors close to each VDD pin and follow PCB layout guidelines in the manufacturer datasheet to maintain creepage and clearance for reinforced insulation. The wide-body SOIC-16 footprint matches industry-standard optocoupler pinouts for drop-in replacement.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical PCB layout guidance not found in the standalone datasheet, optimized for engineers designing isolated interfaces.
Drop-in alternatives for ADUM1301ARWZ-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 ADUM1301ARWZ-RL (same form factor and footprint) — differing in Common-Mode Transient Immunity (CMTI), Package, Technology, Maximum Data Rate, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM1301ARWZ
✅ Drop-In✓ In Stock
$3.03 / Unit
View Datasheet →ADUM1301CRWZ-RL
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1301WSRWZ-RL
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1301WTRWZ-RL
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM3301ARWZ-RL
✅ Drop-In📋 Reference alternative (not in catalog)
SI8422BB-D-IS
✅ Drop-In✓ In Stock
$1.52 / Unit
View Datasheet →ADUM1301ARWZ-RL Specifications
| Product Type | Triple-Channel Digital Isolator |
| Technology | iCoupler (monolithic transformer + CMOS) |
| Number of Channels | 3 |
| Channel Direction (ARWZ) | 2 Input / 1 Output |
| Maximum Data Rate | 1 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs minimum |
| Isolation Voltage (RMS) | 2500 Vrms |
| Supply Voltage (VDD1, VDD2) | 2.7 V to 5.5 V |
| Default Output Logic (ARWZ) | Output Low when input unpowered |
| Propagation Delay (typical) | 32 ns to 100 ns |
| Pulse-Width Distortion | < 40 ns |
| Channel-to-Channel Matching | ~5 ns typical |
| ESD Protection (HBM) | 5 kV |
| Package | 16-pin Wide-Body SOIC (RW-16, 0.295") |
| Operating Temperature Range | -40 °C to +125 °C |
| Creepage / Clearance | 8.0 mm minimum |
| RoHS Status | Compliant |
ADUM1301ARWZ-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 |
| Pin 4 | VIB — Input channel B, side 1 |
| Pin 5 | VOC — Output channel C, side 1 |
| Pin 6 | NC — Not connected (per datasheet) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | GND1 — Ground reference for side 1 |
| Pin 9 | GND2 — Ground reference for side 2 |
| Pin 10 | NC — Not connected (per datasheet) |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | VOC — Output channel C, side 2 |
| Pin 13 | VIB — Input channel B, side 2 |
| Pin 14 | VIA — Input channel A, side 2 |
| 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
ADUM1301ARWZ-RL is suitable for 6 applications: Isolated SPI for Motor Drive Gate Drivers, Isolated RS-485 / Industrial Fieldbus, Isolated ADC/DAC Signal Chains, Solar Inverter Control IGBT Voltages, Medical Device Patient Connections, Battery Management System (BMS) Isolation.
Isolated SPI for Motor Drive Gate Drivers
The ADUM1301ARWZ-RL's three channels and 1 Mbps speed match isolated SPI clock/data/SCMOS patterns between a low-voltage MCU and high-side gate driver in motor drives. With 25 kV/µs CMTI it tolerates the fast dV/dt edges of IGBT switching, and 2500 Vrms with 8 mm creepage suits 480 VAC industrial drive basic insulation. Placed between the MCU's 3.3 V logic and the gate-driver's 5 V high-side domain with 0.1 µF VDD bypass on each side, it replaces three discrete optocouplers with one SOIC-16, eliminating LED aging and CTR drift while reducing PCB area by ~60%.
Recommended
Isolated RS-485 / Industrial Fieldbus
The ADUM1301ARWZ-RL provides signal and power isolation for half-duplex RS-485 transceivers in Modbus RTU, PROFIBUS, and CAN-bus field nodes. Its 2500 Vrms rating meets IEC 61800-5-1 basic insulation requirements, and the 1 Mbps rate covers 10 Mbps CAN and standard Modbus baud rates up to 1 Mbaud. Pair it with the ADM2461EBRWZ-RL or ADM3072EARZ for a complete isolated transceiver. Three channels are sufficient for TX, RX, and DE/RE control, and the wide-body SOIC footprint gives 8 mm creepage for industrial cabinet installations.
Recommended
Isolated ADC/DAC Signal Chains
The ADUM1301ARWZ-RL isolates low-voltage precision ADC inputs from high-voltage sensor domains in industrial measurement equipment. With sub-40 ns pulse-width distortion, it does not limit the dynamic range of 16-bit ADCs at sampling rates up to 200 kSPS. Three channels provide isolated SCLK, SDO/SDI, and CS signals for SPI-interface ADCs. The 5 kV HBM ESD protection on all pins prevents damage during installation. This configuration is widely used in PLC analog input modules and battery management systems.
Recommended
Solar Inverter Control IGBT Voltages
In string solar inverters the ADUM1301ARWZ-RL isolates the 3.3 VDC MCU control signals from the IGBT gate driver operating at 600 VDC bus. The 25 kV/µs CMTI ensures reliable operation under the fast switching transients of high-frequency IGBT bridges at 50 kHz. The wide-body SOIC-16 footprint provides the 8 mm creepage needed for IEC 62109-1 reinforced insulation between the user-accessible DC bus and the grounded low-voltage control section. Pair with isolated DC-DC modules to provide isolated VDD2 supply.
Recommended
Medical Device Patient Connections
The ADUM1301ARWZ-RL's 2500 Vrms isolation supports patient-connected medical devices such as patient monitors, infusion pumps, and diagnostic imaging equipment requiring IEC 60601-1 basic insulation between the patient and the operator-accessible circuitry. With sub-100 ns propagation it preserves the timing integrity of ECG/EEG analog front-end signals. Three channels enable isolated SPI for the analog front-end ADC and PUMP values, and the wide-body SOIC provides 8 mm creepage per IEC 60601-1 reinforced creepage requirements.
Recommended
Battery Management System (BMS) Isolation
The ADUM1301ARWZ-RL isolates the low-voltage master BMS controller from the high-side cell-monitoring ASICs in multi-cell lithium battery packs. Three channels handle clock, data, and chip-select for isolated SPI communications. The 2.7-5.5 V supply supports direct low-voltage scaling, while 2500 Vrms isolation handles 600 V battery stack voltages. The -40 to +125 °C industrial temperature range handles under-hood automotive BMS environments. Pair with isolated DC-DC modules for VDD2 supply generation.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1301ARWZ-RL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1301ARWZ | ADUM1301CRWZ-RL | ADUM1301WSRWZ-RL | ADUM1301WTRWZ-RL | ADUM3301ARWZ-RL | SI8422BB-D-IS |
|---|---|---|---|---|---|---|---|
| Package | 16-pin Wide-Body SOIC (RW-16) | 16-pin Wide-Body SOIC (RW-16) - same | 16-pin Wide-Body SOIC (RW-16) - same | 16-pin Wide-Body SOIC (RW-16) - same | 16-pin Wide-Body SOIC (RW-16) - same | 16-pin Wide-Body SOIC (RW-16) - same | 16-pin Wide-Body SOIC - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Silicon Labs |
| Number of Channels | 3 | 3 | 3 | 3 | 3 | 3 | 2 |
| Maximum Data Rate | 1 Mbps | 1 Mbps | 25 Mbps | 90 Mbps | 90 Mbps | 1 Mbps | 150 Mbps |
| Isolation Rating | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 5000 Vrms | 2500 Vrms |
| CMTI | 25 kV/µs min | 25 kV/µs min | 25 kV/µs min | 25 kV/µs min | 25 kV/µs min | 25 kV/µs min | 50 kV/µs min |
| Supply Voltage | 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 | 2.7 V to 5.5 V |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C |
| Unit Price (qty 1, approx) | $7.33 | $7.50 (tube packaging) | $8.20 | $9.50 | $11.00 | $9.80 | $3.20 |
Key Differentiators
- Reel suffix is auto-loaded for high-volume SMT assembly (vs ADUM1301ARWZ)
- Lower-speed grade for low-power applications (vs ADUM1301CRWZ-RL)
- Analog Devices iCoupler technology with monolithic transformers (vs SI8422BB-D-IS)
- 3 channels in SOIC-16 versus two on SOIC-16 from Silicon Labs (vs SI8422BB-D-IS)
Design Notes
Place 0.1 µF low-ESR ceramic bypass capacitors (X7R dielectric) within 2 mm of each VDD1 (pin 1) and VDD2 (pin 16) supply pin. Connect capacitor grounds directly to the adjacent GND1 (pin 2/8) and GND2 (pin 9/15) pins using short, wide traces. Avoid placing any signal traces or copper pours between the primary-side and secondary-side ground regions to maintain 8 mm creepage/clearance per IEC 60747-17. Wide-body SOIC-16 footprint provides the required 8 mm clearance when properly laid out.
Estimated: At continuous 3-channel operation at 1 Mbps with 5 V supplies, the ADUM1301ARWZ-RL dissipates approximately 60 mW per channel (180 mW total) under typical load. The wide-body SOIC-16 has theta_JA around 80 °C/W on a standard 2-layer JEDEC board, resulting in ~14 °C junction temperature rise above ambient - well within the -40 °C to +125 °C operating range. No thermal management is required for typical isolated-IO applications. For high-density designs with multiple isolators adjacent, provide 5 mm spacing between adjacent isolators to maintain thermal headroom.
Maintain at least 8 mm of creepage distance between any primary-side and secondary-side conductor, including signal traces, vias, and copper fills. Underneath the SOIC body, do not place any traces or copper that would reduce the isolation distance. For surface-mount design, route the high-side and low-side ground regions as separate islands with the isolator as the bridge. Reference the ADuM1300_1301 datasheet application information section for detailed PCB layout examples for reinforced insulation designs.
Do not share VDD1 and VDD2 supply rails if the two sides must remain galvanically isolated - each side requires its own isolated supply. Place a separate isolated DC-DC converter (such as ADuM5020 or ADuM6000) or transformer driver to generate the secondary-side VDD2. Avoid running high-frequency switching signals (PWM, clock) directly across the isolation barrier; route them through the isolator. Verify that the chosen speed grade matches the application: 1 Mbps for slow control, 25 Mbps for SPI, and 90 Mbps for high-speed serial interfaces.
Compliance Information
RoHS compliant per the 'WZ' suffix designation (lead-free matte tin plating). The standard -RWZ industrial grade is not AEC-Q100 qualified; for automotive applications use the ADUM1301WTRWZ-RL variant which is qualified. REACH compliance per manufacturer product page.
