AFE4300 : Sine Wave Distortion of Injection Current Electrode

Sim Myeong Heon

Other Parts Discussed in Thread: TS5A3159, AFE4300

Hello!!

For multi-channel BCM Mesaurement, I connect analog switch(ts5a3159, max4052) for series to injection current channel IOUT0 and IOUT 1.

I connected analog switch(TS5A3159) in series to injection currnet channel IOUT0 and IOUT1.

However, Sine Wave was Distorte.

I don`t konw, what is problem?

TEK00004.TIF

over 8 years ago

0 Prabin Yadav over 8 years ago

TI__Genius 12575 points

Hi Sim,

What is the BCM_DAC frequency in your application. Can you please change the frequency of sine wave and observe it? One reason could be the analog switch may present the parasitic capacitor to AFE causing the distortion.
Also how many channels are you looking at? AFE4300 already have 3 channels for the BCM, is that not sufficient ?

Regards,
Prabin

0 Sim Myeong Heon over 8 years ago in reply to Prabin Yadav

Prodigy 30 points

thank you very much Prabin Yadav

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AFE4300 : Sine Wave Distortion of Injection Current Electrode