renti
Newbie level 6
In a motion control system, there is a control board and a server driver, between which, there are AI/AO/DI/DO signals
The requirement to the AO signals (from control board to server driver) are：
differential voltage signal
common mode voltage: 0V
differential mode voltage: 0V~ 10V
the set-up time (10%~90%) : 40ns ~ 120ns
Now to design the control board , I want use a FPGA.
For the AO mentioned above, I will use FPGA + differential current output DAC + differential I-to-V,
while for the other signals I will use optocoupler to realize electrical isolation.
My questions are:
1. To meet the set-up time, I will use AD5445 as the differential current output DAC, the 10% to 90% settling time is typically 15ns. I want a recommendation to the differential I-to-V circuit, so that the whole settling time requirement is satisfied.
2. As these AO signals are not electrically isolated, will it invalidate the effort of the electrical isolation of the other signal channel?
Thanks a lot!
The requirement to the AO signals (from control board to server driver) are：
differential voltage signal
common mode voltage: 0V
differential mode voltage: 0V~ 10V
the set-up time (10%~90%) : 40ns ~ 120ns
Now to design the control board , I want use a FPGA.
For the AO mentioned above, I will use FPGA + differential current output DAC + differential I-to-V,
while for the other signals I will use optocoupler to realize electrical isolation.
My questions are:
1. To meet the set-up time, I will use AD5445 as the differential current output DAC, the 10% to 90% settling time is typically 15ns. I want a recommendation to the differential I-to-V circuit, so that the whole settling time requirement is satisfied.
2. As these AO signals are not electrically isolated, will it invalidate the effort of the electrical isolation of the other signal channel?
Thanks a lot!
