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Need help to design a transimpedance using ADA4062

Question asked by billyzhao on Feb 12, 2015
Latest reply on Jan 31, 2016 by Jovan.Eps

I am designing a transimpedance using ADA4062-2(figure 1). The input signal contains 1kHz sine wave and 2kHz sine wave. My target is to measure the amplitude and the phase of 2kHz sine wave signal.

 

As the signal is quite small, I decide to use the T feedback network. My question is that would such structure(ada4062+T feedback network) cause serious distortion of 1kHz signal and then affect the phase and amplitude of 2kHz signal? Thank you very much!

 

QQ图片20150213121140.png

Figure 1

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