MAX4505

故障保护、高电压、信号线路保护器


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说明

The MAX4505 is a single signal-line protector featuring a fault-protected input and rail-to-rail signal handling capability. The input is protected from overvoltage faults up to ±36V with power on or ±40V with power off. During a fault condition, the input terminal becomes an open circuit and only nanoamperes of leakage current flow from the source, while the switch output (AOUT) furnishes typically 19mA from the appropriate polarity supply to the load. This ensures an unambiguous rail-to-rail output when a fault begins and ends.

The MAX4505 protects both unipolar and bipolar analog signals using either unipolar (+9V to +36V) or bipolar (±8V to ±18V) power supplies. The device has no logic control inputs; the protector is always on when the supplies are on. On-resistance is 100Ω max, and on-leakage is less than 0.5nA at TA = +25°C. The MAX4505 is available in 5-pin SOT23 and 8-pin µMAX® packages.
MAX4505:典型工作电路 MAX4505:典型工作电路 放大+

关键特性

  • Overvoltage Protection
    • ±40V with Power Off
    • ±36V with Power On
  • Open Signal Paths with Power Off
  • Output Clamps to Either Rail with an Input Overvoltage
  • 100Ω max On-Resistance
  • 10ns Overvoltage Turn-On Delay
  • No Latchup During Power Sequencing
  • Rail-to-Rail Signal Handling
  • 500Ω Output Clamp Resistance During Overvoltage
  • Tiny 5-Pin SOT23 Package

应用

  • 自动测试设备(ATE)
  • 数据采集
  • 热插拔板/系统
  • 过程控制系统
  • 冗余/备份系统
  • 高灵敏度仪表

请查看具体的参数规格 Signal-Line Protectors (6)


Part NumberFunctionsSignal Path Leakage
(±nA)
ΔRONVSUPPLY
(V)
VSUPPLY (Dual)
(±V)
RON
(Ω)
Fault Protect.
(±V)
Package/PinsBudgetary
Price
(max)(Dual)(max)(See Notes)
MAX4505 1-Line20109.0 to 36.08 to 1810040
SOT23/5
$1.59 @1k

Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

技术资料

应用笔记 5299 选择合适的CMOS模拟开关
应用笔记 745 Fault-Tolerant Analog Switches
产品可靠性报告: MAX4505.pdf 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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相关资料

类型 编号 标题
应用笔记 5299 选择合适的CMOS模拟开关
应用笔记 745 Fault-Tolerant Analog Switches