ADUM1250ARZ-RL7 - I2C Digital Isolator 2500Vrms | Analog Devices
MPN: ADUM1250ARZ-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 |
ADUM1250ARZ-RL7 Overview
Digital isolators are components that transfer digital signals across an isolation barrier, providing galvanic isolation to protect circuits from high voltages, ground loops, and noise. They are essential in industrial, medical, and communication systems where safety and signal integrity are paramount. The ADUM1250ARZ-RL7 belongs to the family of I2C isolators, which are specialized for bidirectional communication protocols like I2C.
Key features include non-latching, bidirectional communication channels compatible with I2C interfaces, hot-swap capability, and a wide operating temperature range. The device supports data rates up to 1Mbps, making it suitable for standard and fast-mode I2C. Its high CMTI of 25kV/µs ensures reliable operation in noisy environments, and the 2500Vrms isolation rating provides robust protection.
Technically, the ADUM1250ARZ-RL7 uses Analog Devices' iCoupler technology, which employs chip-scale transformers instead of optocouplers, offering higher reliability, lower power consumption, and better performance. The device operates from a 3.0V to 5.5V supply on both sides, and its hot-swap feature allows insertion or removal without disrupting the bus.
Typical applications include isolated I2C buses in industrial automation, medical equipment, and power management systems. It is also used in battery management, motor control, and any system requiring galvanic isolation for I2C communication.
When designing with this device, ensure proper decoupling on both supply pins and maintain adequate creepage distances on the PCB to meet isolation requirements. The hot-swap feature should be considered in system design to avoid bus contention during power-up.
Drop-in alternatives for ADUM1250ARZ-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 ADUM1250ARZ-RL7 (same form factor and footprint) — differing in Number of Channels, Supply Voltage Range, I2C Compatibility.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM1250ARZ
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →ADUM1251ARZ-RL7
✅ Drop-In✓ In Stock
$3.9 / Unit
View Datasheet →ADUM1251ARZ
✅ Drop-In✓ In Stock
$4.23 / Unit
View Datasheet →ISO1540DR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ISO1541DR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADUM1250ARZ-RL7 Specifications
| Isolation Voltage | 2500 Vrms |
| Number of Channels | 2 (bidirectional) |
| Data Rate | 1 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Package | 8-SOIC (0.154", 3.90mm Width) |
| Supply Voltage | 3.0 V to 5.5 V |
| Operating Temperature Range | -40°C to +125°C |
| Hot-Swap Capable | Yes |
| I2C Compatibility | Yes (Side 2 compliant, Side 1 compatible) |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
ADUM1250ARZ-RL7 Pin Configuration
| Pin 1 | VDD1 — Supply voltage, Side 1 |
| Pin 2 | GND1 — Ground, Side 1 |
| Pin 3 | SDA1 — Bidirectional data line, Side 1 |
| Pin 4 | SCL1 — Bidirectional clock line, Side 1 |
| Pin 5 | SCL2 — Bidirectional clock line, Side 2 |
| Pin 6 | SDA2 — Bidirectional data line, Side 2 |
| Pin 7 | GND2 — Ground, Side 2 |
| Pin 8 | VDD2 — Supply voltage, Side 2 |
Typical Applications
ADUM1250ARZ-RL7 is suitable for 6 applications: Industrial Automation, Medical Equipment, Power Management, Telecommunications, Automotive Electronics, IoT and Smart Home.
Industrial Automation
The ADUM1250ARZ-RL7 provides galvanic isolation for I2C buses in industrial control systems, protecting microcontrollers from high-voltage transients and ground loops. Its 2500Vrms isolation and 25kV/µs CMTI ensure reliable communication in noisy factory environments. The hot-swap capability allows safe insertion and removal of modules without disrupting the bus, which is critical for hot-swappable I/O cards. With a 1Mbps data rate, it supports fast-mode I2C for real-time sensor data acquisition. The 8-SOIC package fits compact PLC and motor control boards, and the wide temperature range (-40°C to +125°C) suits harsh industrial conditions.
Recommended
Medical Equipment
In medical devices, patient safety requires galvanic isolation between low-voltage control circuits and high-voltage sections. The ADUM1250ARZ-RL7 provides 2500Vrms isolation, meeting safety standards for patient monitoring and diagnostic equipment. Its bidirectional I2C channels enable isolated communication with sensors and ADCs, while the high CMTI prevents false triggering from defibrillator pulses or electrosurgical noise. The hot-swap feature allows field-replaceable modules without powering down the system. The small 8-SOIC package is ideal for portable and wearable medical devices, and the low power consumption extends battery life in battery-operated monitors.
Recommended
Power Management
The ADUM1250ARZ-RL7 is used in isolated power management systems, such as digital power supplies and battery management systems (BMS), where I2C is used for configuration and monitoring. Its 2500Vrms isolation protects low-voltage controllers from high-voltage rails, and the 1Mbps data rate allows fast communication for real-time control loops. The hot-swap feature enables safe connection of battery packs or power modules without arcing. The device's high CMTI ensures stable operation in the presence of switching noise from power converters. The 8-SOIC package is suitable for compact power modules, and the wide supply range (3.0V to 5.5V) simplifies interface with various controllers.
Recommended
Telecommunications
In telecom infrastructure, the ADUM1250ARZ-RL7 isolates I2C buses between line cards and control boards, preventing ground loops and protecting against lightning surges. Its 2500Vrms isolation meets telecom surge requirements, and the 25kV/µs CMTI ensures reliable operation in high-EMI environments. The bidirectional channels support I2C for managing optical transceivers, power amplifiers, and other peripherals. The hot-swap feature allows line card replacement without shutting down the system, improving serviceability. The 1Mbps data rate is sufficient for configuration and monitoring, and the 8-SOIC package fits dense PCB layouts in routers and switches.
Recommended
Automotive Electronics
The ADUM1250ARZ-RL7 is used in automotive systems for isolating I2C communication between ECUs and sensors, such as battery management and motor control. Its 2500Vrms isolation protects low-voltage logic from high-voltage traction systems, and the wide temperature range (-40°C to +125°C) meets automotive requirements. The high CMTI ensures reliable operation in the presence of electromagnetic interference from motors and ignition systems. The hot-swap feature is useful for battery pack maintenance. The 1Mbps data rate supports fast sensor data transfer, and the 8-SOIC package is suitable for automotive PCBs. Note: For AEC-Q100 qualified parts, consider ADUM1250ARZ-RL7's automotive variants if available.
Recommended
IoT and Smart Home
In IoT devices, the ADUM1250ARZ-RL7 provides isolation for I2C sensors and actuators, protecting low-power microcontrollers from external noise and ground potential differences. Its low power consumption is suitable for battery-powered devices, and the 2500Vrms isolation ensures safety in smart home applications like lighting control and HVAC. The hot-swap feature allows easy sensor replacement without power cycling. The 1Mbps data rate is sufficient for sensor data, and the 8-SOIC package is compact for space-constrained designs. The wide supply range (3.0V to 5.5V) interfaces with various MCUs, and the high CMTI prevents false triggering from household appliances.
Recommended
Recommended Products Summary
Engineering reference data for ADUM1250ARZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM1250ARZ | ADUM1251ARZ-RL7 | ISO1540DR |
|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Number of Bidirectional Channels | 2 | 2 | 1 | 2 |
| Hot-Swap Capable | Yes | Yes | Yes | No |
| Supply Voltage | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V |
Key Differentiators
- Hot-swappable design (vs ISO1540DR)
- Two bidirectional channels (vs ADUM1251ARZ-RL7)
- iCoupler technology (vs ISO1540DR)
Design Notes
Ensure proper PCB layout for isolation: maintain at least 8mm creepage distance between Side 1 and Side 2 traces to meet 2500Vrms isolation requirements. Place decoupling capacitors (0.1µF) close to VDD1 and VDD2 pins. Use a solid ground plane on each side, but do not connect the grounds together except through the isolator.
The ADUM1250ARZ-RL7 requires a supply voltage between 3.0V and 5.5V on both sides. Ensure that both supplies are within this range and are properly decoupled. The device consumes low quiescent current, but dynamic current increases with data rate; size the supply accordingly.
Do not exceed the absolute maximum ratings, especially the isolation voltage. The hot-swap feature allows insertion/removal, but ensure that the bus is not actively communicating during hot-swap to avoid data corruption. Also, note that Side 1 is only I2C compatible, not fully compliant, so verify signal levels with your I2C devices.
Compliance Information
RoHS compliant per distributor data. AEC-Q100 not specified for this part.
