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Visitor kobay000
Visitor
588 Views
Registered: ‎09-08-2017

Zynq ZC702 & XADC

Hi, I'm new with Zynq devices and XADC. So, i need to measure 6 different external voltage sources (3 current & 3 voltage transducers actually) simultaneously in a project. Could it be done with ZC702? It is really confusing when i look user guide. It says that only 1st and 2nd pins (VN & VP) of J40 are the dedicated analog input channels for the XADC. So that means there is only 1 ADC? If so, how can i reach my goal? Any help would be appreciated.

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4 Replies
Adventurer
Adventurer
568 Views
Registered: ‎05-25-2016

Re: Zynq ZC702 & XADC

xadc.png

zynq has additonal auxiliary analog inputs.

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Visitor kobay000
Visitor
554 Views
Registered: ‎09-08-2017

Re: Zynq ZC702 & XADC

So, it can be done without using extra board (Analog Multiplexer etc.)? I mean MUX representation in UG480 is just informative then?

Capture.PNG

 

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Moderator
Moderator
479 Views
Registered: ‎08-08-2017

Re: Zynq ZC702 & XADC

Hi @kobay000

There are no Separate ADC's for on chip temperature sensor , Supplies and Auxiliary inputs.  As your objective here is to monitor 6 differential analog inputs 

 

1. You have to connected it to top level of the design.

2. Assigned/locked it to associated pin location. 

3. Enable Channel Sequencer through XADC wizard and enable 6 channels as shown below  [ Configure the XADC registers as per your requirement (page 42 of UG480) if you are instantiating XADC Primitive ] 

Capture.PNG

 

Note :  Some auxiliary analog channels might not be supported in certain  Zynq-7000 AP SoC device package options. you should consult the package file for the device. 

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Visitor kobay000
Visitor
444 Views
Registered: ‎09-08-2017

Re: Zynq ZC702 & XADC

Capture.PNG

Do i need to buy analog signal multiplexer card? Also connect it to which pins?

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