Our customer is studying with your AD5700-1 HART modem.
So he has tossed the following questions.
When he receive the HART signal, what is the min-max time of 1bit pulse width the digital signal that is outputed from RxD pin?
Your recommended value is 833usec. But what is the min-max value?
As for the HART signal that is inputed to ADC_IP pin, what is the delay time the digital signal that is outputed from RxD pin?
The schematic of customer same as Fig-23 value (Ref voltage divided by 2-1.2Mohm, and put it into ADC_IP pin).
So he has catched REF and ADC_IP voltage as REF=1.501V ADC_IP=0.803V when does not communicate HART. They catched by DMM not scope shot.
He expected the ADC_IP=0.75V in this case.
Does your ADC_IP pin load a little bit current?
I am confirming the tolerance of the divide 2 resisters also.