The AD5700/AD5700-1 data sheet states that specifications apply to both A and B models ( i.e. "all specifications are from -40°C to +125°C and relate to both A and B models, unless otherwise noted"), but I'm unable to ferret-out what distinguishes between…
What is the difference between the AD5700 & AD5700-1 products?
Hi Kaos,
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
Rgds,
Tracey…
Q.
Can the AD5700/AD5700-1 support Full Duplex Operation?
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A.
HART is, by nature, half duplex. It uses one channel (one pair of wires) for both directions. If one side is transmitting…
Hi,
The HART Protocol Token-Passing Data Link Layer Specification (HCF_SPEC-81 Revision 8.2) talks about Service Access Points (SAPs) that must be supported by a field device.
One of the Physical Layer SAPs is described as follows:
"ENABLE.confirm…
What are the key features of the AD5700 & AD5700-1 HART Modem products?
I'm not finding any input specification (or application examples) for the HART_IN pin that implies its input z and/or bias current requirements. Specifically, I'm wanting to use the part's internal filter option and am undecided how to apply protection…
I use EVAL-AD5700-1EBZ to connect to RSET of EVAL-AD5422LFEBZ based on the description in the section 'Circuit Evaluation & Test' in the following page.
http://www.analog.com/en/design-center/reference-designs/hardware-reference-design/circuits…
I designed the circuit based on CN0278 and replaced AD5422 LFCSP version with TSSOP version.
AT HART_OUT pin, I can observe 500mVp-p signal, but at RSET pin, the signal is attenuated a lot and
the signal only has 50mVp-p swing. Judging from the CN0278…
I am not achieving the 1.71V minimum supply voltage specified for the AD5700-1.
The lowest I can achieve is 1.83V while the device is still outputting a modulated signal. Any lower (1.827V) and the signal disappears completely. This is measured at the…