Overview
The ADUM1251WARZ-RL7, produced by Analog Devices Inc., is a hot swappable, dual I2C isolator designed to provide reliable and isolated communication between two I2C buses. This component is part of the ADuM1250/ADuM1251 series, which features advanced magnetic isolation technology to ensure high-speed data transfer while maintaining electrical isolation. The ADUM1251WARZ-RL7 is particularly useful in applications where hot swapping of cards or modules is required, preventing data glitches during the insertion or removal of unpowered cards onto an active bus.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Supply Voltage (VDD1, VDD2) | 3.0 | - | 5.5 | V | - |
| Maximum Frequency | - | - | 1000 | kHz | - |
| Output Fall Time (5V Operation) | 13 | 26 | 120 | ns | CL1 = 40 pF, R1 = 1.6 kΩ, CL2 = 400 pF, R2 = 180 Ω |
| Propagation Delay (tPLH12, tPHL12) | 13 | 26 | 120 | ns | Side 1 to Side 2, 5V operation |
| Rated Dielectric Insulation Voltage | - | - | 2500 | Vrms | 1-minute duration |
| Ambient Operating Temperature (TA) | -40 | - | 105 | °C | A Grade |
| Package Type | - | - | - | - | 8-lead SOIC |
Key Features
- Bidirectional I2C Communication: Supports bidirectional data transfer between two isolated I2C buses.
- Hot Swappable: Designed to prevent data glitches when an unpowered card is inserted or removed from an active bus.
- Open-Drain Interfaces: Compatible with open-drain I2C interfaces.
- High-Speed Operation: Operates up to 1 Mbps.
- Wide Supply Voltage Range: Supports supply/logic levels from 3.0 V to 5.5 V.
- High Isolation Voltage: Provides 2500 Vrms isolation voltage for enhanced safety and reliability.
- Low Propagation Delay: Minimizes signal delay between the isolated sides.
Applications
The ADUM1251WARZ-RL7 is suitable for various applications requiring isolated I2C communication, including:
- Industrial Automation: In systems where modules or cards need to be hot swapped without disrupting the bus operation.
- Medical Devices: Where isolation is critical for patient safety and to prevent electrical noise interference.
- Aerospace and Defense: In systems requiring high reliability and isolation to ensure data integrity.
- Automotive Systems: For isolated communication in vehicle networks and control systems.
Q & A
- What is the primary function of the ADUM1251WARZ-RL7?
The primary function is to provide isolated bidirectional I2C communication between two separate buses. - What is the maximum frequency of operation for the ADUM1251WARZ-RL7?
The maximum frequency is 1000 kHz. - What is the supply voltage range for the ADUM1251WARZ-RL7?
The supply voltage range is from 3.0 V to 5.5 V. - What is the isolation voltage rating of the ADUM1251WARZ-RL7?
The isolation voltage rating is 2500 Vrms for 1 minute. - Is the ADUM1251WARZ-RL7 suitable for hot swap applications?
Yes, it is designed to prevent data glitches during hot swapping of cards or modules. - What is the package type of the ADUM1251WARZ-RL7?
The package type is an 8-lead SOIC. - What are the ambient operating temperature ranges for the ADUM1251WARZ-RL7?
The ambient operating temperature range is from -40°C to +105°C for A Grade and -40°C to +125°C for S and W Grades. - Does the ADUM1251WARZ-RL7 support open-drain I2C interfaces?
Yes, it supports open-drain I2C interfaces. - What is the propagation delay of the ADUM1251WARZ-RL7?
The propagation delay is typically 13 to 26 ns for 5V operation. - Is the ADUM1251WARZ-RL7 RoHS compliant?
Yes, it is RoHS compliant.
