Overview
The ADUM1251ARZ, produced by Analog Devices Inc., is a digital isolator designed to provide reliable and efficient isolation for I2C communication interfaces. This component is part of the ADuM1250/ADuM1251 family, which features hot swappable capabilities and non-latching, bidirectional communication channels. The ADUM1251ARZ is particularly suited for applications where isolation between two I2C buses is necessary, ensuring data integrity and preventing glitches during hot swap operations.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Supply Voltages (VDD1, VDD2) | -0.5 | 7.0 | V | Relative to GND1, GND2 | |
| Input/Output Voltage (VSDA1, VSCL1, VSDA2, VSCL2) | -0.5 | VDD1 + 0.5 (Side 1), 7.0 (Side 2) | V | ||
| Average Output Current per Pin (IO1, IO2) | ±18 mA (Side 1), ±100 mA (Side 2) | mA | |||
| Propagation Delay (tPHL) | 162 | ns | From Side 2 input logic threshold to output value of 0.9 V | ||
| Operating Temperature (TA) | -40 | 125 | °C | S, W Grades | |
| Isolation Voltage (VIORM) | 2500 | Vrms | |||
| Surge Isolation Voltage (VIOSM) | 6250 | Vpeak | 10 kV, 1.2 µs rise time, 50 µs, 50% fall time |
Key Features
- Bidirectional I2C communication with non-latching channels
- Hot swappable design to prevent data glitches during insertion or removal of unpowered cards
- Open-drain interfaces compatible with I2C bus operating in the 3.0 V to 5.5 V range
- 30 mA current sink capability
- 1000 kHz operation frequency
- iCoupler technology for magnetic isolation, ensuring high insulation resistance and low capacitance
- 8-lead SOIC package
Applications
The ADUM1251ARZ is suitable for various applications requiring isolated I2C communication, including:
- Industrial control systems where isolation between different voltage domains is necessary
- Medical devices that require high isolation for safety and regulatory compliance
- Automotive systems where robust and reliable communication is critical
- Embedded systems and microcontrollers that need isolated communication interfaces
Q & A
- What is the primary function of the ADUM1251ARZ?
The ADUM1251ARZ is a digital isolator designed to provide isolated bidirectional I2C communication. - What is the significance of the hot swappable feature?
The hot swappable feature prevents data glitches when an unpowered card is inserted or removed from an active bus. - What is the operating voltage range for the ADUM1251ARZ?
The ADUM1251ARZ operates within a supply voltage range of 3.0 V to 5.5 V. - What is the maximum isolation voltage of the ADUM1251ARZ?
The maximum isolation voltage is 2500 Vrms. - What is the propagation delay of the ADUM1251ARZ?
The propagation delay is typically 162 ns. - What package type is the ADUM1251ARZ available in?
The ADUM1251ARZ is available in an 8-lead SOIC package. - Is the ADUM1251ARZ RoHS compliant?
Yes, the ADUM1251ARZ is RoHS compliant. - What is the maximum operating temperature for the ADUM1251ARZ?
The maximum operating temperature is 125°C for S and W grades. - What technology is used for isolation in the ADUM1251ARZ?
The ADUM1251ARZ uses iCoupler technology for magnetic isolation. - What are some common applications for the ADUM1251ARZ?
Common applications include industrial control systems, medical devices, automotive systems, and embedded systems.
