AD2S1210 circuit alive check

First of all I am not using a evaluation board but a custom PCB. Some faults have been found and we are now trying to see if the AD2S1210 is working properly. 

We are going to configure it but for now we just want an excitation output to see that it is alive and working.

From the datasheet I see no reason to ever setting chip select high. As long as we are only talking to this device. Of course if we use the same interface with other devices then yes we would need to use chip select. Am I correct?

We will use parallel interface) so I set SOE high. We will want 16 bit resolution but RES1/0 should not matter.

From what I understand if I set the following input I should get a excitation frequency of default 10 KHz without any configuration.

CLKIN = 8.192 MHz input
CS = Low
RD = High
WR/SYNC = High
SOE = High 
RES1 = High
RES1 = High
A1 = Low
A0 = Low
DB = tri-state
SAMPLE = High

RESET_N goes high after power is within range.

Am I missing anything from the datasheet?

Top Replies

    •  Analog Employees 
    •  Super User 
    May 7, 2021 +1 verified
    From the datasheet I see no reason to ever setting chip select high. As long as we are only talking to this device. Of course if we use the same interface with other devices then yes we would…
Parents
  • +1
    •  Analog Employees 
    •  Super User 
    on May 7, 2021 1:49 PM
    From the datasheet I see no reason to ever setting chip select high. As long as we are only talking to this device. Of course if we use the same interface with other devices then yes we would need to use chip select. Am I correct?

    You are correct.

    We will want 16 bit resolution but RES1/0 should not matter.

    With regards to your initial setup you are correct that RES1 and RES0 will not matter.

    RESET_N goes high after power is within range.

    Once you release RESET_N after power up the excitation outputs should start up assuming you've provide (as you stated) a master clock. 

    You mentioned inputting 8.192Mhz into CLKIN are you using a CMOS Oscillator or a parallel resonant crystal across CLKIN and XTAL out? 

    If you are using a CMOS input can you see the an inverted clock on XTALOUT?  If not this path may have been damaged and the part won't work and you'll need to replace the AD2S1210 device.

    Please let us know if there are additional questions you might have.

    Sean

Reply
  • +1
    •  Analog Employees 
    •  Super User 
    on May 7, 2021 1:49 PM
    From the datasheet I see no reason to ever setting chip select high. As long as we are only talking to this device. Of course if we use the same interface with other devices then yes we would need to use chip select. Am I correct?

    You are correct.

    We will want 16 bit resolution but RES1/0 should not matter.

    With regards to your initial setup you are correct that RES1 and RES0 will not matter.

    RESET_N goes high after power is within range.

    Once you release RESET_N after power up the excitation outputs should start up assuming you've provide (as you stated) a master clock. 

    You mentioned inputting 8.192Mhz into CLKIN are you using a CMOS Oscillator or a parallel resonant crystal across CLKIN and XTAL out? 

    If you are using a CMOS input can you see the an inverted clock on XTALOUT?  If not this path may have been damaged and the part won't work and you'll need to replace the AD2S1210 device.

    Please let us know if there are additional questions you might have.

    Sean

Children
  • Thank you for confirming. I will just keep CS low all the time then.

    We are using a crystal across CLKIN and XTAL. Here was the first issue. Wrong capacitors caused the crystal to not produce a clock. But we found other issues we are fixing but good to have a way of easy check we have not damaged it when we have patched our PCB.

    Thank you for your great and quick help.