尝试在运行时配置OpAmp for Mode：OpAmp和Mode：Follower

你好，
我是一个经验丰富的PSoC应用程序设计员。我使用PSoC 5LP。我有一个应用程序，使用opAMP V1.90。
大多数时候，我需要用模式= OpAMP配置OpAmp。“-”输入被路由到电流检测电阻器的外部引脚。然而，由于1MEG欧姆输入阻抗（观察到但在数据表中没有指定），由于额外的绘制和合成噪声，我不能解决电流的30UA。
如果我“硬”配置模式=跟随器，我可以解决非常低的电流到1uA，噪音低得多。
我想在optAMP中配置opAMP到模式＝opAMP，当需要解析1UA时，在运行时的代码中切换到模式=跟随器。如果需要的话，我可以在寄存器级操作，但是如果有一些API调用来提供这一点，那就太好了。
注：我尝试使用模拟多路复用器外部的运算放大器来执行这个期望的功能。我注意到许多成功的问题，不得不放弃尝试。
谢谢你的帮助。
伦恩



以下为原文
Hi,

I'm a seasoned PSoC applica tion designer. I'm using a PSoC 5LP. I have an application that uses the OpAmp v1.90.

Most of the time I need to configure the OpAmp with a mode = OpAmp. The '-' input is routed to an external pin of a current sense resistor. However due to the < 1Meg ohm input impedance (observed but not specified in the datasheet), I cannot resolve to < 30uA of current due to the extra draw and resultant noise.

If I "hard" configure the mode = Follower, I can resolve very low currents to ~ 1uA with much lower noise.

I want to configure the OpAmp to mode = OpAmp in the TopDesign and switch to mode=Follower in the code at run0time when needing to resolve to 1uA. I can operate at the register level if needed but it would be nice if there were some API calls to provide this.

Note: I tried using a analog mux external to the OpAmp to perform this desired function. I noticed many problems doing this successfully and had to abandon the attempt.

Thanks for the help in advance.

Len