ADG5248F是AD公司的一款过压保护和检测产品,ADG5248F是故障保护和检测、0.8 pC QINJ、8:1多路复用器,本站介绍了ADG5248F的封装应用图解、特点和优点、功能等,并给出了与ADG5248F相关的AD元器件型号供参考。
ADG5248F - 故障保护和检测、0.8 pC QINJ、8:1多路复用器 - 过压保护和检测 - 开关和多路复用器 - Analog Devices, LLC
ADG5248F和 ADG5249F 分别为8:1和双通道4:1模拟多路复用器。 ADG5248F将8路输入之一切换至公共输出,ADG5249F将4路差分输入之一切换至公共差分输出。 当接通时,各通道在两个方向的导电性能相同,输入信号范围可扩展至电源电压范围。 主电源电压定义导通电阻曲线,而副电源电压定义过压保护启动时的电平。
没有电源时,通道保持关断状态,开关输入处于高阻态。 正常工作条件下,如果任一Sx引脚上的模拟输入信号电平超过正故障电压(POSFV)或副故障电压(NEGFV),并且超出幅度达到阈值电压(VT),则通道关断,并且该Sx引脚变为高阻态。 如开关选为接通状态,漏极引脚将被拉至所超过的副电源电压。 无论有无供电,相对于地达到+55 V或−55 V的输入信号电平都会被阻塞。
这些开关具有低电容和电荷注入特性,因而是要求低开关毛刺和快速建立时间的数据采集与采样保持应用的理想解决方案。
请注意,在整篇数据手册中,多功能引脚(如A0/F2)由整个引脚名称或引脚的单个功能表示;例如A0即表示仅与此功能相关。
产品特色
- 源极引脚具有过压保护功能,可以耐受高于副供电轨,达到−55 V和+55 V的电压。
- 在未供电情况下,源极引脚的过压保护范围是−55 V至+55 V。
- 过压检测提供数字输出,指示开关的工作状态。
- 沟道隔离可防止闩锁。
- 针对低电荷注入和导通电容而优化。
应用
The EVAL-ADG5248FEBZ, is the evaluation board for the ADG5248F, which features an overvoltage protected 8:1 Multiplexer. The ADG5248F has overvoltage detection and protection circuitry on the source pins and is protected against signals up to −55 V and +55 V in both the powered and unpowered states.
The ADG5248F is soldered to the center of the evaluation board, and wire screw terminals are provided to connect to each of the source and drain pins. Three screw terminals are used to power the device, with a fourth terminal used to provide a user defined digital logic supply voltage, if required. Alternatively, a low dropout (LDO) regulator is provided for 5 V digital logic supply and to supply the LEDs, which are mounted to provide visual indication of the fault status of the switch.
Full specifications on the ADG5248F are available in the product data sheet, which should be consulted in conjunction with this user guide when using the evaluation board.
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