In order to acquire readings from one or more HART-enabled Loop-Powered Smart Transmitters, we are planning to use AD5700 in HART Master Mode. It would be of immense help, if one can give us a reference circuit using AD5700 in HART Master Mode. At high-level the functional diagram is as shown below. Thanks a lot !
Hi Corvid Team,
1. Yes, you can use the circuit in Fig 28 to interface one or more HART Field Instruments in Multi-drop mode if all HART Field Instruments communicate only through HART.
2. Yes, you must…
Please take a look at the following reference designs: CN0414, CN0418, or CN0435 (PLC/DCS system example).
1. Please check out the schematic of EVAL-AD5700-1EBZ. Probably this is a mistake in the mentioned figure.That capacitor should be 22nF like is mentioned also in datasheet.
2. For low impedance…
2. For low impedance devices, the RLOAD range is typically 230 Ω to 600 Ω.
The circuit worked as per our expectation.
Thank youCorvid Team
Great. We are glad that we were able to help you.