Overview
The ADuM1250ARZ, produced by Analog Devices Inc., is a hot swappable digital isolator designed for bidirectional I2C communication. This component is part of the ADuM1250/ADuM1251 family, which provides non-latching, bidirectional communication channels compatible with I2C interfaces. The ADuM1250 specifically offers two bidirectional channels, supporting a complete isolated I2C interface, making it suitable for applications requiring reliable and glitch-free data transmission between isolated domains.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Rated Dielectric Insulation Voltage | 2500 | V rms | 1-minute duration |
| Minimum External Air Gap (Clearance) | 4.0 | mm | Measured from input terminals to output terminals, shortest distance through air |
| Minimum External Tracking (Creepage) | 4.0 | mm | Measured from input terminals to output terminals, shortest distance path along body |
| Minimum Clearance in the Plane of the Printed Circuit Board (PCB) | 4.5 | mm | Measured from input terminals to output terminals, shortest distance through air, line of sight, in the PCB mounting plane |
| Supply Voltages | −0.5 V to +7.0 V | V | VDD1 to GND1 and VDD2 to GND2 |
| Input/Output Voltage | −0.5 V to VDD1 + 0.5 V | V | Side 1 (VSDA1, VSCL1) and Side 2 (VSDA2, VSCL2) |
| Average Output Current per Pin | ±18 mA (Side 1), ±100 mA (Side 2) | mA | |
| Operating Temperature | −40°C to +105°C (A Grade), −40°C to +125°C (S, W Grades) | °C | |
| Storage Temperature | −55°C to +150°C | °C |
Key Features
- Hot swappable to prevent glitching data when an unpowered card is inserted onto an active bus.
- Non-latching, bidirectional communication channels compatible with I2C interfaces.
- Two bidirectional channels for complete isolated I2C interface (ADuM1250).
- Open-drain interfaces.
- 30 mA current sink capability.
- 1000 kHz operation.
- 3.0 V to 5.5 V supply/logic levels.
- Based on iCoupler chip scale transformer technology for magnetic isolation.
Applications
The ADuM1250ARZ is suitable for various applications requiring isolated I2C communication, such as:
- Industrial control systems where isolation is critical for safety and reliability.
- Medical devices that require isolation to protect patients and equipment.
- Automotive systems where robust and reliable communication is essential.
- Consumer electronics that need to isolate different voltage domains.
Q & A
- What is the primary function of the ADuM1250ARZ?
The ADuM1250ARZ is a hot swappable digital isolator designed for bidirectional I2C communication. - How many bidirectional channels does the ADuM1250 provide?
The ADuM1250 provides two bidirectional channels. - What is the rated dielectric insulation voltage of the ADuM1250ARZ?
The rated dielectric insulation voltage is 2500 V rms for 1-minute duration. - What are the supply voltage ranges for the ADuM1250ARZ?
The supply voltages range from −0.5 V to +7.0 V for both VDD1 to GND1 and VDD2 to GND2. - What is the operating temperature range for the ADuM1250ARZ?
The operating temperature range is −40°C to +105°C (A Grade) and −40°C to +125°C (S, W Grades). - What technology is used for isolation in the ADuM1250ARZ?
The ADuM1250ARZ uses iCoupler chip scale transformer technology for magnetic isolation. - Is the ADuM1250ARZ suitable for hot swap applications?
Yes, it is designed to prevent glitching data when an unpowered card is inserted onto an active bus. - What is the maximum current sink capability of the ADuM1250ARZ?
The maximum current sink capability is 30 mA. - At what frequency can the ADuM1250ARZ operate?
The ADuM1250ARZ can operate at up to 1000 kHz. - What are some typical applications of the ADuM1250ARZ?
Typical applications include industrial control systems, medical devices, automotive systems, and consumer electronics requiring isolated I2C communication.
