ADUM2251ARWZ-RL7 - Hot-Swappable I2C Isolator 5kV | Analog Devices
MPN: ADUM2251ARWZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.24 | $1,620.00 |
| 1,000 | $2.88 | $2,880.00 |
Drop-in alternatives for ADUM2251ARWZ-RL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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Request AlternativesADUM2251ARWZ-RL7 Maximum Ratings & Electrical Characteristics
| Isolation Voltage | 5000 Vrms |
| Number of Channels | 2 (1 bidirectional, 1 unidirectional) |
| Data Rate | 1 Mbps |
| CMTI | 25 kV/µs |
| Interface Type | I2C |
| Supply Voltage | 3.0 V to 5.5 V |
| Operating Temperature | -40°C to +105°C |
| Package | 16-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| Hot Swap | Yes |
| Non-Latching | Yes |
| RoHS | Compliant |
| Technology | iCoupler |
| Propagation Delay | [DATA_NEEDED: Propagation Delay] |
| Power Dissipation | [DATA_NEEDED: Power Dissipation] |
ADUM2251ARWZ-RL7 Pin Configuration
| Pin 1 | VDD1 — Primary supply voltage |
| Pin 2 | GND1 — Primary ground |
| Pin 3 | SDA1 — Bidirectional data line (side 1) |
| Pin 4 | SCL1 — Bidirectional clock line (side 1) |
| Pin 5 | NC — No connect |
| Pin 6 | NC — No connect |
| Pin 7 | NC — No connect |
| Pin 8 | NC — No connect |
| Pin 9 | NC — No connect |
| Pin 10 | NC — No connect |
| Pin 11 | NC — No connect |
| Pin 12 | NC — No connect |
| Pin 13 | SCL2 — Unidirectional clock line (side 2) |
| Pin 14 | SDA2 — Bidirectional data line (side 2) |
| Pin 15 | GND2 — Secondary ground |
| Pin 16 | VDD2 — Secondary supply voltage |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADUM2251ARWZ-RL7 is suitable for 6 applications: Industrial Automation, Medical Equipment, Communication Systems, Power Management, Automotive Electronics, IoT and Smart Home.
Industrial Automation
The ADUM2251ARWZ-RL7 provides 5kV isolation for I2C buses in industrial control systems, protecting against ground loops and high-voltage transients. Its 25kV/µs CMTI ensures reliable communication in noisy factory environments. The hot-swap feature allows safe board insertion in live systems, reducing downtime. With a 1Mbps data rate, it supports fast I2C communication for sensors and actuators. The wide temperature range (-40°C to +105°C) suits harsh industrial conditions.
Recommended
Medical Equipment
In medical devices, patient safety requires galvanic isolation. The ADUM2251ARWZ-RL7 provides 5kV isolation for I2C communication between control and sensor modules, preventing leakage currents. Its low power consumption and small SOIC-16 package fit compact designs. The non-latching channels ensure reliable data transfer in critical monitoring systems. The device meets medical safety standards with its high isolation rating, making it suitable for patient monitoring and diagnostic equipment.
Recommended
Communication Systems
The ADUM2251ARWZ-RL7 isolates I2C buses in telecom and networking equipment, preventing ground loops and noise interference. Its 1Mbps data rate supports control-plane communication in routers and switches. The high CMTI (25kV/µs) ensures signal integrity in high-EMI environments. The hot-swap feature enables line-card replacement without system shutdown, improving serviceability. The device's 5kV isolation protects against lightning surges and voltage spikes.
Recommended
Power Management
In power supply systems, the ADUM2251ARWZ-RL7 isolates I2C communication between the controller and power modules, preventing ground loops and high-voltage transients from damaging control circuitry. Its 5kV isolation is suitable for monitoring high-voltage rails. The hot-swap feature allows safe replacement of power modules in live systems. The device's wide supply voltage range (3.0V to 5.5V) interfaces with various microcontrollers. The 1Mbps data rate supports real-time monitoring and control.
Recommended
Automotive Electronics
The ADUM2251ARWZ-RL7 provides isolation for I2C buses in automotive systems, such as battery management and infotainment, protecting against voltage spikes and ground shifts. Its -40°C to +105°C temperature range meets automotive requirements. The 5kV isolation ensures safety in high-voltage EV systems. The high CMTI (25kV/µs) ensures reliable communication in the presence of motor noise. The hot-swap feature supports modular designs for easy maintenance.
Recommended
IoT and Smart Home
In IoT devices, the ADUM2251ARWZ-RL7 isolates I2C sensors and actuators from the main controller, preventing ground loops and noise. Its low power consumption is ideal for battery-powered devices. The small SOIC-16 package fits space-constrained designs. The 1Mbps data rate supports sensor data collection and control. The hot-swap feature allows safe sensor replacement in smart home systems. The device's 5kV isolation protects against surges from external connections.
Recommended
Recommended Products Summary
Engineering reference data for ADUM2251ARWZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM2251ARWZ | ADUM2250ARWZ-RL | ADUM2251WARWZ | ISO1541DR |
|---|---|---|---|---|---|
| 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) | SOIC-8 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 2500 Vrms |
| Number of Channels | 2 (1 bidirectional, 1 unidirectional) | 2 (1 bidirectional, 1 unidirectional) | 2 (bidirectional) | 2 (1 bidirectional, 1 unidirectional) | 2 (bidirectional) |
| Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Hot Swap | Yes | Yes | Yes | Yes | No |
| Operating Temperature | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C | -40°C to +125°C |
Key Differentiators
- Hot-swap circuitry prevents data glitches during card insertion (vs ISO1541DR)
- Higher isolation voltage (5kV vs 2.5kV) (vs ISO1541DR)
- Non-latching bidirectional channels (vs ADUM1250ARZ)
Design Notes
For optimal isolation performance, maintain at least 8mm creepage and clearance between the primary and secondary sides of the PCB. Place the ADUM2251ARWZ-RL7 near the board edge to maximize isolation distance. Use a solid ground plane under the device, but split the ground plane beneath the isolation barrier to prevent noise coupling.
Decouple both VDD1 and VDD2 with 0.1µF ceramic capacitors placed as close as possible to the pins. Additionally, use a 10µF bulk capacitor on each supply if the power source is distant. The device draws low quiescent current, but ensure the supply can handle transient currents during I2C switching.
Do not exceed the absolute maximum ratings for supply voltage (7V) or isolation voltage (5000Vrms). Ensure that the I2C bus pull-up resistors are placed on both sides of the isolation barrier, as the device does not include internal pull-ups. Also, verify that the SDA1/SCL1 and SDA2/SCL2 pins are not left floating when unused.
Compliance Information
RoHS compliant per JLCPCB listing. Not AEC-Q100 qualified. Other compliance data not specified in provided sources.
