Overview
The ADUM1251WARZ, produced by Analog Devices Inc., is a hot swappable, dual I2C isolator that utilizes the iCoupler® chip scale transformer technology. This device is designed to provide magnetic isolation between two I2C buses, ensuring reliable and safe communication in various applications. The ADUM1251WARZ supports bidirectional I2C communication and is particularly suited for hot swap applications, eliminating the need for separate transmit and receive signals. It operates within a supply/logic level range of 3.0 V to 5.5 V, making it versatile for different system requirements.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|---|
| Supply Voltages | VDD1 to GND1, VDD2 to GND2 | -0.5 | 7.0 | V | ||
| Input/Output Voltage | VSDA1, VSCL1, VSDA2, VSCL2 | -0.5 | VDD + 0.5 | V | ||
| Average Output Current per Pin | IO1, IO2 | ±18 mA (Side 1), ±100 mA (Side 2) | mA | |||
| Maximum Frequency | 1000 kHz | kHz | ||||
| Propagation Delay | tPLH12, tPHL12 | 13 | 26 | 120 | ns | 5 V operation, CL1 = 40 pF, R1 = 1.6 kΩ, CL2 = 400 pF, R2 = 180 Ω |
| Rated Dielectric Insulation Voltage | 2500 V rms | V rms | 1-minute duration | |||
| Minimum External Air Gap (Clearance) | L(I01) | 4.0 mm | mm | Measured from input terminals to output terminals |
Key Features
- Bidirectional I2C Communication: Supports full-duplex communication without the need for separate transmit and receive signals.
- Open-Drain Interfaces: Compatible with open-drain I2C bus configurations.
- Hot Swappable: Designed to prevent glitching data when an unpowered card is inserted onto an active bus.
- High Current Sink Capability: Up to 30 mA current sink capability.
- Wide Supply/Logic Levels: Operates within a range of 3.0 V to 5.5 V.
- High Temperature Operation: Qualified for operation up to 125°C, making it suitable for automotive and other high-temperature applications.
- Compact Package: Available in an 8-lead, RoHS compliant SOIC package.
Applications
- Industrial Control Systems: Used in industrial automation and control systems where isolation is critical.
- Automotive Systems: Qualified for automotive applications due to its high temperature operation and reliability.
- Medical Devices: Suitable for medical devices requiring isolation to ensure patient safety.
- Data Acquisition Systems: Used in data acquisition systems to isolate the sensor side from the controller side.
- Embedded Systems: Used in various embedded systems where I2C communication and isolation are necessary.
Q & A
- What is the primary function of the ADUM1251WARZ?
The ADUM1251WARZ is a hot swappable, dual I2C isolator that provides magnetic isolation between two I2C buses.
- What is the operating voltage range of the ADUM1251WARZ?
The device operates within a supply/logic level range of 3.0 V to 5.5 V.
- What is the maximum frequency of operation for the ADUM1251WARZ?
The maximum frequency of operation is 1000 kHz.
- Is the ADUM1251WARZ suitable for hot swap applications?
- What is the rated dielectric insulation voltage of the ADUM1251WARZ?
The rated dielectric insulation voltage is 2500 V rms for a 1-minute duration.
- What is the minimum external air gap (clearance) required for the ADUM1251WARZ?
The minimum external air gap is 4.0 mm, measured from input terminals to output terminals.
- Is the ADUM1251WARZ RoHS compliant?
- What are some common applications of the ADUM1251WARZ?
- What is the maximum temperature rating for the ADUM1251WARZ?
- Does the ADUM1251WARZ support bidirectional I2C communication?
