Our customer is studying with your AD5700-1 on his product.
So I have a question for you.
When he assert get the duplex signal, your AD5700-1 receive TxD signal though the condition of RTS signal and output the HART_OUT(1200Hz/2200Hz Tx).
Is this correct driving?
If so, when HART_OUT and HART_IN(ADC_IP) are coonected to same analog circuit, then HART_IN is received always.
And finaly, CD signal is asserted always.
Is this correct?
Please refer to my enclosed 2 scope shots for you.
RTS in green, HART_OUT in yellow
The lower shot is zoomed one.
scope01.png = HART_OUT for DUPLEX assert/RTS deassert
scope02.png = HART_OUT for DUPLEX assert/RTS assert
With the duplex pin asserted, /RTS @ ground, and HART_OUT connected to HART_IN, CD will be high.
This FAQ on the duplex mode of the AD5700/AD5700-1 may also be of interest to you:
FAQ: AD5700/AD5700-1 & Full Duplex Operation