Hi,
I would like to ask you a question about PGA gain as below.
My customer has been evaluating AFE5803 and recently has a problem with PGA gain 30dB.
They observed PGA gain 24dB correctly working but about 30dB, they observed the gain was around 28dB.
For example,
LNA=12dB, PGA=24dB --- totally 36dB
LNA=12dB, PGA=30dB --- totally 40dB, not 42dB
It seems very strange...
Their register setting about power mode is "Low noise mode". (Register 53[10]=0 and 53[11]=0 setting)
The input signal is 200KHz, sin wave.
Are there any restrictions of the register setting about power mode?
Could you give me any advice about the phenomenon?
Thank you for your support.
Best Regards,
