ADUM2251

热插拔双通道I2C® 隔离器,5 kV

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产品详情

ADuM2250/ADuM2251 为热插拔数字隔离器,内置非闩锁双向通信通道,且与I2C接口兼容。这样就不需要将I2C信号分成单独的发送信号与接收信号,供独立光电耦合器使用。

ADuM2250提供两个双向通道,支持完全隔离的I2C接口。ADuM2251提供一个双向通道和一个单向通道,适合不需要双向时钟的应用。

ADuM2250/ADuM2251 均内置热插拔电路,可防止将无源卡插入有源总线时产生数据干扰。

这些隔离器都采用ADI公司的 iCoupler® 芯片级变压器技术。iCoupler 是磁隔离技术,其功能、性能、尺寸和功耗均优于光电耦合器。ADuM2250/ADuM2251将 iCoupler 通道与半导体电路集成,在小型封装中实现完全隔离的 I2C 接口。


应用

  • I2C、 SMbus或PMBus 接口隔离
  • 多级I2C接口
  • 电源
  • 网络
  • 以太网供电

产品生命周期

checked 量产

该产品系列中至少有一个型号已量产并可供采购。该产品适合用于新设计,但也可能有更新的替代产品。

评估套件

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EVAL-ADuM1250

EVAL-ADuM1250 电路图

产品详情

The EVAL-ADuM1250EBZ supports two bidirectional channels for evaluation of isolated I2C interfaces in 8-lead SOIC packages. The evaluation board provides a JEDEC standard, 8-lead SOIC_N pad layout. This layout supports signal distribution, loopback, and loads referenced to the VDDx or GNDx planes, as well as optimal bypass capacitance. Signal sources can be conducted to the board through header pins or through edge mounted Sub- miniature Version A (SMA) connectors (SMA connectors must be ordered separately).

Screw terminal blocks on the evaluation board provide power connections. The board includes 200 mil (5.08 mm) header positions for compatibility with active probes (probe header pins must be ordered separately). The EVAL-ADuM1250EBZ evaluation board can be used to evaluate the ADuM1250, ADuM1251, ADuM2250, and ADuM2251 devices. Although the pad layout on the EVAL- ADuM1250EBZ does not support the ADuM2250 and ADuM2251 16-lead SOIC_W and SOIC_IC packages, these devices are functionally equivalent to the ADuM1250 and ADuM1251, respectively, for the purposes of evaluation. They differ only by package and isolation capabilities. Therefore, evaluations of the ADuM1250 and ADuM1251 can be applied to the ADuM2250 and ADuM2251 as well.

The evaluation board follows best printed circuit board (PCB) design practices for 4-layer boards, including a full power and ground plane on each side of the isolation barrier. No other electromagnetic interference (EMI) or noise mitigation design features are included on this evaluation board. For high speed operation, or when ultralow emissions are required, refer to the AN-1109 Application Note for additional evaluation board layout techniques.

Full specifications for the ADuM1250 are available in the ADuM1250 data sheet, which must be consulted in conjunction with User Guide UG-1100 when working with the evaluation board.

参考电路

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CN0388

CN0388 电路图

CN0388 实物图

参考资料

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设计资源

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设计资源

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ADUM2251 材料声明
PCN-PDN信息 质量和可靠性 原理图符号和PCB封装

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所示报价为单片价格。所列的美国报价单仅供预算参考,指美元报价(每片美国离岸价),如有修改恕不另行通知。由于地区关税、商业税、汇率及手续费原因,国际报价可能不同。