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Visitor yannis
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279 次查看
注册日期: ‎03-12-2019

2.5V IO输出电平问题

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每个bank的Vcco都是3.3V输入,现在想得到2.5V或者1.8V的IO电平输出,该如何实现?之前尝试过用稳压模块,但是对于高速控制信号稳压输出后的波形不理想

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Xilinx Employee
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注册日期: ‎08-08-2007

回复: 2.5V IO输出电平问题

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hi @yannis 

 

这里有些电平转换的方案。

https://www.xilinx.com/support/documentation/application_notes/xapp899.pdf

 

您看看是否满足要求。

 

谢谢

Boris

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Xilinx Employee
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注册日期: ‎08-08-2007

回复: 2.5V IO输出电平问题

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hi @yannis 

 

电阻分压或者74系列电平转换器件。

 

谢谢

Boris

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Visitor yannis
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回复: 2.5V IO输出电平问题

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@borisq 万分感谢!项目要求上升下降沿都是ns级的,请问74系列电平转化器件或者电阻分压能实现高速转化的要求吗?

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Xilinx Employee
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259 次查看
注册日期: ‎06-02-2017

回复: 2.5V IO输出电平问题

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@yannis ,

你所指的高速大概是多大的频率啊?如果使用转换芯片(Level shifter)的话需要关注转换芯片的速度限制。

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Visitor yannis
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注册日期: ‎03-12-2019

回复: 2.5V IO输出电平问题

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@zhiq 做PWM控制,时序周期为1us,要求上升下降沿为ns级

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Xilinx Employee
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注册日期: ‎06-02-2017

回复: 2.5V IO输出电平问题

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@yannis ,

速度不低了,特别是对于上升下降沿的要求比较高,随便查了两个常用的level shifter型号都没法满足这个要求,你需要查一下高速电平转换芯片的型号。

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Xilinx Employee
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243 次查看
注册日期: ‎08-08-2007

回复: 2.5V IO输出电平问题

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hi @yannis 

 

这里有些电平转换的方案。

https://www.xilinx.com/support/documentation/application_notes/xapp899.pdf

 

您看看是否满足要求。

 

谢谢

Boris

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