Overview
The ADUM2251ARWZ is a hot-swappable, dual I2C isolator produced by Analog Devices Inc. This component is designed to provide galvanic isolation for I2C, SMBus, or PMBus interfaces, ensuring reliable and safe communication between different voltage domains. The ADUM2251ARWZ features bidirectional communication channels, making it suitable for a variety of applications that require isolated data transfer.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Voltage - Isolation | 5000 | Vrms | UL recognition: 5000 V rms for 1 minute per UL 1577 |
| Common Mode Transient Immunity (Min) | 25 | kV/µs | |
| Data Rate | 1 | Mbps | |
| Propagation Delay (Max) | 145ns / 85ns | Rise / Fall Time | |
| Voltage - Supply | 3 V ~ 5.5 V | ||
| Operating Temperature | -40°C ~ 105°C | ||
| Package / Case | 16-SOIC (0.295", 7.50mm Width) | ||
| Input Capacitance | 4.0 pF | ||
| Input to Output Resistance | 1012 Ω | ||
| Input to Output Capacitance | 2.2 pF | f = 1 MHz |
Key Features
- Bidirectional I2C communication
- Open-drain interfaces
- Suitable for hot swap applications
- 30 mA current sink capability
- 1000 kHz operation
- High temperature operation: up to 105°C
- Safety and regulatory approvals: UL, CSA, IEC 60601-1, IEC 60950-1, VDE certificate of conformity
- Qualified for automotive applications
Applications
- Isolated I2C, SMBus, or PMBus interfaces
- Multilevel I2C interfaces
- Power supplies
- Networking
- Power over Ethernet (PoE)
Q & A
- What is the primary function of the ADUM2251ARWZ?
The ADUM2251ARWZ is a hot-swappable, dual I2C isolator designed to provide galvanic isolation for I2C, SMBus, or PMBus interfaces.
- What is the voltage isolation rating of the ADUM2251ARWZ?
The ADUM2251ARWZ has a voltage isolation rating of 5000 Vrms.
- What is the maximum data rate supported by the ADUM2251ARWZ?
The ADUM2251ARWZ supports a data rate of up to 1 Mbps.
- What is the operating temperature range of the ADUM2251ARWZ?
The operating temperature range is from -40°C to 105°C.
- Is the ADUM2251ARWZ suitable for hot swap applications?
Yes, the ADUM2251ARWZ is designed to be hot swappable.
- What are the safety and regulatory approvals for the ADUM2251ARWZ?
The ADUM2251ARWZ has approvals from UL, CSA, IEC 60601-1, IEC 60950-1, and VDE certificate of conformity.
- Can the ADUM2251ARWZ be used in automotive applications?
Yes, the ADUM2251ARWZ is qualified for automotive applications.
- What is the package type of the ADUM2251ARWZ?
The ADUM2251ARWZ comes in a 16-SOIC (0.295", 7.50mm Width) package.
- What is the current sink capability of the ADUM2251ARWZ?
The ADUM2251ARWZ has a 30 mA current sink capability.
- How does the ADUM2251ARWZ prevent bus contention and latch-up?
The ADUM2251ARWZ prevents bus contention and latch-up by ensuring that only externally generated input signals are transferred across the isolator, and by guaranteeing compliance with I2C standard logic low thresholds.
