the ch1 of TAP6424 connect the load of 6.8uF&4ohm. customer use AC diagbostic,
set gain =1 I=10mA
read register 0x17 value is 1D, so the Impedance_CH is 29*0.059=1.711ohm.
use Channelx Impedance equlation of 18.104.22.168.3, the Channelx Impedance=1.711*2.371/(1*10)=0.4ohm. But, With 18.75kHz signal, the actual load impedance is 4.19ohm. there have 10times gap between caluation and actural value.
is there mistake? thanks