ADUM1311ARWZ-RL7 - 3-Ch Digital Isolator 3750Vrms | Analog Devices
MPN: ADUM1311ARWZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.47 | $1,235.00 |
| 1,000 | $2.22 | $2,220.00 |
ADUM1311ARWZ-RL7 Overview
A digital isolator is a component that transfers digital signals across an isolation barrier without a direct electrical connection, using capacitive, inductive, or optical coupling. It is a key element in systems requiring galvanic isolation for safety, noise immunity, or ground potential differences. Digital isolators are part of the broader category of isolation components, which also include optocouplers and isolated amplifiers. They are essential in industrial automation, medical devices, and communication systems where signal integrity and safety are critical.
Key features of the ADUM1311ARWZ-RL7 include three independent isolation channels, a wide supply range of 2.7V to 5.5V, and a high CMTI of 25kV/µs, which ensures reliable operation in noisy environments. The device uses monolithic air core transformers, eliminating the need for LEDs and photodiodes, thus improving performance and reliability compared to optocouplers. It also supports data rates up to 10Mbps in other variants, but this specific model is rated for 1Mbps.
Technically, the ADUM1311ARWZ-RL7 integrates high-speed CMOS and transformer technology, providing low propagation delay and high noise immunity. The isolation barrier is rated for 3750Vrms, making it suitable for reinforced insulation in many applications. The device is designed to meet safety standards such as UL, CSA, and VDE, though specific certifications should be verified from the datasheet.
Typical applications include industrial fieldbus communication, isolated SPI interfaces, motor control, and power supply monitoring. The wide supply range and high CMTI make it ideal for use in harsh industrial environments where ground loops and electrical noise are common. It is also used in medical equipment for patient isolation and in renewable energy systems for inverter control.
When designing with this device, ensure proper PCB layout to maintain isolation spacing and minimize parasitic capacitance. Place decoupling capacitors close to the supply pins, and follow the manufacturer's recommendations for creepage and clearance distances to meet safety standards.
Drop-in alternatives for ADUM1311ARWZ-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 ADUM1311ARWZ-RL7 (same form factor and footprint) — differing in Operating Temperature Range, Supply Voltage (VDD1/VDD2).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM1311ARWZ-RL
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1311ARWZ
✅ Drop-In✓ In Stock
$2.25 / Unit
View Datasheet →ADUM1310ARWZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.2 / Unit
View Datasheet →ISO7731DW
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SI8631BB-B-IS1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADUM1311ARWZ-RL7 Specifications
| Number of Channels | 3 |
| Isolation Voltage | 3750 Vrms |
| Data Rate | 1 Mbps |
| Common Mode Transient Immunity (CMTI) | 25 kV/µs |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Package | 16-SOIC (0.295", 7.50mm Width) |
| Operating Temperature Range | -40°C to +105°C |
| Output Type | Digital |
| Technology | iCoupler |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| REACH Status | Compliant |
| AEC-Q100 | Not Qualified |
ADUM1311ARWZ-RL7 Pin Configuration
| Pin 1 | VDD1 — Supply voltage side 1 |
| Pin 2 | GND1 — Ground side 1 |
| Pin 3 | VIA — Input channel A |
| Pin 4 | VIB — Input channel B |
| Pin 5 | VIC — Input channel C |
| Pin 6 | GND1 — Ground side 1 |
| Pin 7 | NC — No connect |
| Pin 8 | NC — No connect |
| Pin 9 | NC — No connect |
| Pin 10 | GND2 — Ground side 2 |
| Pin 11 | VOC — Output channel C |
| Pin 12 | VOB — Output channel B |
| Pin 13 | VOA — Output channel A |
| Pin 14 | GND2 — Ground side 2 |
| Pin 15 | VDD2 — Supply voltage side 2 |
| Pin 16 | NC — No connect |
Typical Applications
ADUM1311ARWZ-RL7 is suitable for 6 applications: Industrial Fieldbus Communication, Isolated SPI Interface, Motor Control, Medical Patient Isolation, Power Supply Monitoring, Renewable Energy Inverters.
Industrial Fieldbus Communication
The ADUM1311ARWZ-RL7 provides galvanic isolation for fieldbus interfaces like RS-485 and CAN. Its 3750Vrms isolation and 25kV/µs CMTI ensure reliable data transmission in noisy industrial environments. The 1Mbps data rate is sufficient for most fieldbus protocols, and the wide supply range allows direct interface with 3.3V or 5V controllers. By isolating the bus transceiver, ground loops are eliminated, preventing data corruption and equipment damage. The device's high CMTI rejects common-mode transients from motor drives and other inductive loads, maintaining signal integrity. This makes it ideal for PLCs, motor control centers, and factory automation systems.
Recommended
Isolated SPI Interface
The ADUM1311ARWZ-RL7 is well-suited for isolating SPI buses between microcontrollers and peripheral devices like ADCs or DACs. Its three channels can isolate SCLK, MOSI, and CS signals, while MISO can be handled by a separate isolator or a fourth channel if available. The 1Mbps data rate supports many SPI clock frequencies, and the low propagation delay ensures minimal timing skew. The device's 2.7V to 5.5V supply range allows level shifting between different logic domains, simplifying mixed-voltage designs. In applications like data acquisition systems, this isolation protects sensitive analog circuitry from digital noise and ground potential differences. The high CMTI also prevents false triggering in electrically noisy environments.
Recommended
Motor Control
In motor control applications, the ADUM1311ARWZ-RL7 isolates the control signals between the microcontroller and the gate driver or power stage. Its 3750Vrms isolation protects low-voltage logic from high-voltage transients, while the 25kV/µs CMTI ensures reliable operation in the presence of fast switching noise. The 1Mbps data rate is adequate for PWM control signals, and the wide supply range allows direct connection to 3.3V or 5V logic. By isolating the control and power grounds, the device prevents ground loops that can cause erratic behavior or damage. This makes it suitable for variable frequency drives, servo drives, and robotics. The device's robust isolation also enhances system safety by preventing fault currents from reaching the control circuitry.
Recommended
Medical Patient Isolation
The ADUM1311ARWZ-RL7 is used in medical devices to provide galvanic isolation between patient-connected circuits and the main control system. Its 3750Vrms isolation rating meets safety requirements for many medical applications, ensuring patient safety by preventing leakage currents. The device's low power consumption and wide supply range make it suitable for battery-powered portable monitors. The high CMTI is beneficial in environments with electrosurgical equipment, which can generate large common-mode transients. By isolating the signal path, the device reduces the risk of electrical shock and improves measurement accuracy. It is commonly used in ECG, EEG, and patient monitoring systems, where signal integrity and safety are paramount.
Recommended
Power Supply Monitoring
The ADUM1311ARWZ-RL7 is used to isolate digital monitoring signals in power supply systems, such as status flags, fault signals, and control signals. Its 3750Vrms isolation allows safe monitoring of high-voltage rails from a low-voltage controller. The 1Mbps data rate is sufficient for transmitting status information, and the high CMTI ensures reliable operation in the presence of switching noise from the power converter. The wide supply range enables direct interface with auxiliary power supplies. By isolating the monitoring circuitry, the device prevents ground loops and protects the controller from high-voltage transients. This is essential in applications like server power supplies, industrial power converters, and battery management systems.
Recommended
Renewable Energy Inverters
In solar and wind power inverters, the ADUM1311ARWZ-RL7 isolates control signals between the DSP/MCU and the power stage. Its 3750Vrms isolation protects the low-voltage control circuitry from high DC bus voltages, while the 25kV/µs CMTI ensures reliable operation in the presence of fast switching transients. The 1Mbps data rate is adequate for PWM and fault signals, and the wide supply range allows direct connection to 3.3V or 5V logic. By isolating the control and power grounds, the device prevents ground loops that can cause instability or damage. This makes it suitable for grid-tied inverters, charge controllers, and energy storage systems. The device's robust isolation enhances system reliability and safety in harsh outdoor environments.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1311ARWZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1311ARWZ-RL | ADUM1311ARWZ | ADUM1310ARWZ | ISO7731DW | SI8631BB-B-IS1 |
|---|---|---|---|---|---|---|
| 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) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Silicon Labs |
| Isolation Voltage | 3750 Vrms | 3750 Vrms | 3750 Vrms | 3750 Vrms | 5000 Vrms | 2500 Vrms |
| Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps | 100 Mbps | 150 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs | 35 kV/µs |
| Supply Voltage Range | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.25V to 5.5V | 2.5V to 5.5V |
| Number of Channels | 3 | 3 | 3 | 3 | 3 | 3 |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C | -55°C to +125°C | -40°C to +125°C |
Key Differentiators
- iCoupler technology eliminates LED aging (vs Optocoupler alternatives)
- Higher isolation voltage than SI8631 (vs SI8631BB-B-IS1)
- Lower data rate but sufficient for many applications (vs ISO7731DW)
Design Notes
For the ADUM1311ARWZ-RL7, maintain proper creepage and clearance distances on the PCB to meet the 3750Vrms isolation rating. The SOIC-16 package has a minimum creepage of 8mm, so ensure the PCB layout provides at least this distance between the input and output sides. Use a ground plane split under the device to minimize parasitic capacitance and improve CMTI. Place decoupling capacitors (0.1µF) close to each VDD pin to reduce power supply noise.
Route the isolation barrier traces with at least 8mm spacing to maintain the isolation rating. Avoid running traces parallel to the isolation barrier for long distances, as this can increase capacitive coupling and reduce CMTI. Use a solid ground plane on each side, but do not connect them under the device. For high-speed signals, keep trace lengths short and use impedance-controlled routing if necessary. Reference the Analog Devices layout guidelines in the datasheet for optimal performance.
A common mistake is exceeding the absolute maximum supply voltage of 5.5V, which can damage the device. Ensure the power supply is stable and within the specified range. Also, avoid floating unused inputs; tie them to a defined logic level. When using the device for voltage translation, ensure the logic levels are compatible with the supply voltages. Finally, verify that the data rate does not exceed 1Mbps for this variant, as higher speeds require the -10 variant.
Compliance Information
RoHS and REACH compliance indicated in distributor listings. AEC-Q100 not qualified for this variant.