[原创] Maxim MAX22444－6快速低功耗四路数字电流隔离器解决方案

Maxim公司的MAX22444–MAX22446是增强的快速低功耗四路数字电流隔离器,采用Maxim公司的专有工艺技术,能在电路间以不同的功率传输数字信号,1.8V时1Mbps时每路的功率仅为0.74mW,能经受住5kV RMS电压60秒,最大数据速率25Mbps或200Mbps,主要用在隔离SPI接口,工业自动化现场总线通信,隔离RS-485/RS-422和CAN,以及电池管理和医疗系统.本文介绍了MAX22444–MAX22446主要优势和特性,框图和应用电路,以及评估板MAX22444/5FWEVKIT主要特性,电路图,材料清单和PCB设计图.

The MAX22444–MAX22446 are reinforced, fast, low-power 4-channel digital galvanic isolators using Maxim’s proprietary process technology. These devices transfer digital signals between circuits with different power domains, using as little as 0.74mW per channel at 1Mbps (1.8V supply). All of the devices in the family feature einforced isolation for a withstand voltage rating of 5kVRMSfor 60 seconds.

The MAX22444–MAX22446 family offers all possible unidirectional channel configurations to accommodate any 4-channel design, including SPI, RS-485, and digital I/O applications. Output enable for the A side of the MAX22445R/S/U/V is active-low, making them ideal for isolating a port on a shared SPI bus since the CS signal can directly enable the MISO signal on the isolator. All other output enables in the MAX22444-MAX22446 family are the traditional active-high.
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