ADUM2251: Hot-Swappable Dual I^2C(R) Isolators, 5 kV
ADuM 2250/ADuM 2251*是一种可热插拔的数字式隔离器,带有非锁存的双向通信通道,并可以与I^2C接口相兼容。这就避免了将I^2C信号分离为单独的发射和接收信号、分别通过分立的光耦隔离器进行耦合的必要。
ADuM2250提供了2条双向通道,支持完全隔离的I^2C接口。ADuM2251提供了1条双向的通道和1条单向通道,以方便那些无需双向时钟的应用。
ADuM2250/ADuM2251包含了热插拔电路,可以防止未上电的板卡插入到通电的总线插口上时数据信号出现尖峰。
这些隔离器都是基于Analog Devices,Inc.的iCoupler(R)片上变压器技术。iCoupler属于磁耦合隔离技术,与光耦隔离技术相比,其在功能、性能、尺寸和功耗方面都具有优势。ADuM2250/ADuM2251将iCoupler通道与半导体电路集成到一起,从而实现了一个完整的、小尺寸的、隔离化I^2C接口。
The ADuM2250/ADuM2251* are hot swappable digital isolators with nonlatching bidirectional communication channels and are compatible with I^2C interfaces. This eliminates the need for splitting I^2C signals into separate transmit and receive signals for use with stand-alone optocouplers.
The ADuM2250 provides two bidirectional channels supporting a complete isolated I^2C interface. The ADuM2251 provides one bidirectional channel and one unidirectional channel for those applications where a bidirectional clock is not required.
The ADuM2250/ADuM2251 contain hot swap circuitry to prevent data glitches when an unpowered card is inserted onto an active bus.
These isolators are based on iCoupler(R) chip-scale transformer technology from Analog Devices, Inc. iCoupler is a magnetic isolation technology with functional, performance, size, and power consumption advantages compared to optocouplers. The ADuM2250/ADuM2251 integrate iCoupler channels with semiconductor circuitry to enable a complete, isolated I^2C interface provided in a small form-factor.
产品应用领域 Applications
- 隔离型I^2C,SMbus,或者PMBus接口
- 多电平I^2C接口
- 电源
- 网络
- 以太网供电
- Isolated I^2C, SMbus, or PMBus Interfaces
- Multilevel I^2C interfaces
- Power supplies
- Networking
- Power-over-Ethernet
ADUM2251 特点
- 双向I^2C通信
- 漏极开路接口
- 适合于热插拔应用
- 适合于热插拔应用
- 1000kHz工作
- 3.0V～5.5V电源/逻辑电平
- 宽体SOIC 16脚封装,爬电距离>8mm
- 高工作温度： 105°C
- 安全性和法规认证
- UL认证（已申报）
- 5000V rms,1min,达到UL1577水平
- CSA（加拿大标准协会）
component acceptance notice #5A - Bidirectional I^2C communication
- Open-drain interfaces
- Suitable for hot swap applications
- 30 mA current sink capability
- 1000 KHz operation
- 3.0 V to 5.5 V supply/logic levels
- Wide body SOIC 16-lead package with > 8 mm creepage
- High temperature operation: 105°C
- Safety and regulatory approvals
- UL recognition (pending)
- 5000 V rms for 1 minute per UL 1577
- CSA component acceptance notice #5A
ADUM2251 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| ADUM2251ARWZ | 量产 | 16 ld SOIC - Wide | 16 | 工业 |
| ADUM2251ARWZ-RL | 量产 | 16 ld SOIC - Wide | 16 | 工业 |