Hi, Thank you for your reply. We use the AFE5803EVM to receive the output of the TX_SDK_V1. So the output of the LM96530 is AC coupled to the receiver. LM96530 OUTPUT AFE5803 INPUT Later we change the RREF of the LM96530 from (RREF = 6.25 kΩ → IS = 8mA) to (RREF = 50 kΩ → IS = 1mA), the output DC offset increases from -300mV to -16mV. How can the internal current source effect the output? However, the received signal still has a low frequency noise, which limits the use of low frequency (0.2MHz - 1MHz) ultrasound transducer. I am wondering where the low frequency comes from. Is it still comes from the DC offset or anywhere else.
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