AFE5809: AFE5809

Eric Liu(SZ-FAE)

Part Number: AFE5809

Hi team.

if I unsoldered the bypass capacitor in AFE5809 INM pin，is there any affects？

0 Shabbir Amjhera Wala over 1 year ago

Hi,

Removing capacitor on INM pin is not advisable as it can lead to oscillations in the LNA block.

Regards,

Shabbir

0 Eric Liu(SZ-FAE) over 1 year ago in reply to Shabbir Amjhera Wala

Hi Shabbir,

is the oscillations caused by the invert input pin floating? but if we connect it to the GND, is this issue can be resolved?

0 Eric Liu(SZ-FAE) over 1 year ago in reply to Shabbir Amjhera Wala

for the LNA ,I didn't see the feedback resistor. is this res integrated into the LNA?

0 Shabbir Amjhera Wala over 1 year ago in reply to Eric Liu(SZ-FAE)

Hi,

Yes oscillation will be due to INM being floating.

No we cant connect INM to ground since it will cause large DC current and functional failure.

Regards,

Shabbir

0 Shabbir Amjhera Wala over 1 year ago in reply to Eric Liu(SZ-FAE)

Yes the resistor setting the LNA gain and also active termination resistor is integrated in the LNA.

Regards,

Shabbir

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