ADUM1311ARWZ - 3-Ch Digital Isolator 1Mbps | Analog Devices
MPN: ADUM1311ARWZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.15 | $31.50 |
| 100 | $2.8 | $280.00 |
| 500 | $2.5 | $1,250.00 |
| 1,000 | $2.25 | $2,250.00 |
ADUM1311ARWZ Overview
Digital isolators are components that transmit digital signals across an isolation barrier, preventing DC current flow while allowing AC signal transfer. They are essential in systems requiring galvanic isolation for safety, noise immunity, or ground potential differences. The ADUM1311ARWZ uses iCoupler technology, which employs micro-transformers to couple signals, offering advantages over optocouplers such as higher speed, lower power, and better reliability.
Key features include low power operation: 1.7 mA per channel max at 0-2 Mbps and 4.0 mA per channel max at 2-10 Mbps for 5V operation; for 3V operation, 1.0 mA per channel max at 0-2 Mbps. The device has a patented refresh feature that ensures DC correctness in the absence of input transitions and during power-up/power-down. It also allows the user to predetermine the default output state in the absence of input VDD1 power via a control pin.
The ADUM1311ARWZ is designed for general-purpose isolation in industrial, medical, and communication systems. Its high CMTI and low power make it suitable for isolating SPI, UART, and other serial interfaces. The 16-pin SOIC-W package is widely used and easy to integrate.
Typical applications include isolated data acquisition, motor control, power inverters, and isolated sensor interfaces. The device's robust isolation barrier protects sensitive electronics from high-voltage transients and ground loops.
When designing with this device, ensure proper decoupling on both power supplies (VDD1 and VDD2) and consider the propagation delay for timing-sensitive applications. The default output state control pin should be set according to system safety requirements.
Drop-in alternatives for ADUM1311ARWZ — 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 (same form factor and footprint) — differing in Technology, Number of Channels, Data Rate, Package, Isolation Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM1311ARWZ-RL
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM1310ARWZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.2 / Unit
View Datasheet →ADUM1301ARWZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.03 / Unit
View Datasheet →ADUM1300ARWZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.75 / Unit
View Datasheet →ISO7721DW
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.45 / Unit
View Datasheet →Si8621BB-B-IS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADUM1311ARWZ Specifications
| Number of Channels | 3 |
| Isolation Voltage | 3750 Vrms |
| Data Rate | 1 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Supply Voltage (VDD1/VDD2) | 3V to 5.5V |
| Supply Current per Channel (5V, 0-2 Mbps) | 1.7 mA max |
| Supply Current per Channel (5V, 2-10 Mbps) | 4.0 mA max |
| Supply Current per Channel (3V, 0-2 Mbps) | 1.0 mA max |
| Operating Temperature Range | -40°C to +125°C |
| Package | 16-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| Technology | iCoupler |
| Default Output State | Configurable via control pin |
| RoHS Status | Compliant |
ADUM1311ARWZ Pin Configuration
| Pin 1 | VDD1 — Input supply voltage |
| Pin 2 | GND1 — Input ground |
| Pin 3 | VIA — Input channel A |
| Pin 4 | VIB — Input channel B |
| Pin 5 | VIC — Input channel C |
| Pin 6 | GND1 — Input ground |
| Pin 7 | NC — No connect |
| Pin 8 | NC — No connect |
| Pin 9 | VOD — Output channel D |
| Pin 10 | VOE — Output channel E |
| Pin 11 | VOF — Output channel F |
| Pin 12 | GND2 — Output ground |
| Pin 13 | NC — No connect |
| Pin 14 | NC — No connect |
| Pin 15 | VDD2 — Output supply voltage |
| Pin 16 | GND2 — Output ground |
Typical Applications
ADUM1311ARWZ is suitable for 6 applications: Isolated Data Acquisition, Motor Control, Power Inverters, Isolated Sensor Interfaces, Isolated Communication Interfaces, Medical Equipment.
Isolated Data Acquisition
The ADUM1311ARWZ provides galvanic isolation for data acquisition systems, protecting sensitive ADCs and microcontrollers from high-voltage transients. Its 3750 Vrms isolation and 25 kV/µs CMTI ensure reliable data transfer in industrial environments. The low power consumption (1.7 mA per channel at 5V) makes it suitable for portable instruments. It can isolate SPI or UART interfaces between sensors and controllers, preventing ground loops and noise interference.
Recommended
Motor Control
In motor control systems, the ADUM1311ARWZ isolates the low-voltage control circuitry from the high-voltage power stage. Its high CMTI (25 kV/µs) ensures reliable operation in the presence of fast switching transients. The 1 Mbps data rate is sufficient for PWM control signals. The device's low propagation delay and configurable default output state enhance system safety. It can be used to isolate gate driver signals or feedback from current sensors.
Recommended
Power Inverters
The ADUM1311ARWZ is ideal for power inverter applications where galvanic isolation is required between the control and power stages. Its 3750 Vrms isolation rating provides robust protection against high-voltage transients. The high CMTI ensures signal integrity in noisy environments. The device's low power consumption reduces thermal load in compact designs. It can isolate communication lines between the inverter controller and monitoring systems.
Recommended
Isolated Sensor Interfaces
The ADUM1311ARWZ provides isolation for sensor interfaces, protecting sensitive electronics from ground potential differences and noise. Its low power consumption (1.0 mA per channel at 3V) is ideal for battery-powered sensors. The 1 Mbps data rate supports most sensor protocols. The device's small SOIC package saves board space. It can isolate temperature, pressure, or current sensors in industrial monitoring systems.
Recommended
Isolated Communication Interfaces
The ADUM1311ARWZ is used to isolate communication interfaces like UART, SPI, and I2C in systems where ground isolation is critical. Its 3750 Vrms isolation and 25 kV/µs CMTI ensure reliable data transfer in industrial networks. The device's low power consumption makes it suitable for field instruments. It can be used in isolated RS-485 or CAN transceivers to prevent ground loops.
Recommended
Medical Equipment
In medical equipment, the ADUM1311ARWZ provides patient isolation, protecting users from electric shock. Its 3750 Vrms isolation rating meets safety standards for medical devices. The low power consumption and small package are ideal for portable monitors. The device's high reliability ensures continuous operation in critical applications. It can isolate ECG, EEG, or patient monitoring signals.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1311ARWZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1311ARWZ-RL | ADUM1310ARWZ | ISO7721DW |
|---|---|---|---|---|
| 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) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Number of Channels | 3 | 3 | 3 | 2 |
| Isolation Voltage | 3750 Vrms | 3750 Vrms | 3750 Vrms | 3000 Vrms |
| Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 100 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs |
| Supply Voltage | 3V to 5.5V | 3V to 5.5V | 3V to 5.5V | 2.25V to 5.5V |
| Default Output State | Configurable | Configurable | Configurable | Fixed |
Key Differentiators
- Configurable default output state (vs ISO7721DW)
- Higher isolation voltage (vs ISO7721DW)
- Lower power consumption at 3V (vs Si8621BB-B-IS)
Design Notes
Ensure both VDD1 and VDD2 are properly decoupled with 0.1µF capacitors placed close to the pins. The device draws up to 4.0 mA per channel at 5V, so the supply must be able to handle the total current. For 3V operation, the current is lower, but still ensure adequate decoupling to prevent noise.
Maintain proper creepage and clearance distances on the PCB to meet the isolation rating. The SOIC-W package has a minimum creepage of 8mm, but verify the layout meets safety standards. Keep the isolation barrier clear of copper traces to avoid reducing the isolation voltage.
Do not exceed the absolute maximum ratings for supply voltage or input/output currents. The default output state control pin must be set correctly to ensure safe operation during power-up. Also, consider the propagation delay when designing timing-critical circuits, as it can affect system performance.
Compliance Information
RoHS compliant per product documentation. Other compliance data not specified in provided sources.