Hello Mr. li!
We received your letter, very happy to communicate with you in Beijing, confirmed the contents of our answer:
1, must the DPD amp have ADL5375? This problem according to DPD amp uses the chip, the OP6180 of course can be used ADL5375, also can use the same function as the other chips, according to our DPD amp uses OP6180 chip, so with ADL5375. The thick black line on the logic diagram said, if there are other better solutions can also be used, the sketch map of OP6180 is the development version