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DDC264
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  • Forum Post: DDC264 questions

    Ron Ying
    Hello, I am looking into the chip DDC264 (I have not used any DDC chips before), and trying to find out if I can daisy-chain 8 chips of the DDC264 for a 512-channel input. The sampling frequencies are between 2KHz and 6KHz. In the Spec of SBAS368C –MAY 2006–REVISED JULY 2011, page 18...
    on Jan 5, 2012

  • Forum Post: Re: DDC264 questions

    Bob Benjamin
    Ron, Welcome to the forum! The DDC products are now a part of the High Reliability support group. In the future, please direct your questions to this forum. Let's start with the last question first. The C and CK versions are not the same. You will see two sets of columns in the electrical specifications...
    on Jan 5, 2012

  • Forum Post: Re: DDC264 questions

    Ron Ying
    HI Bob, Thank you for the reply! What will be the corresponding value of 274ms (I assume this is C version value too) in page 19, equation 3 for the CK version? Thank you, Ron
    on Jan 5, 2012

  • Forum Post: Re: DDC264 questions

    Ron Ying
    Bob, Thank you again for the fast reply! Best regards, Ron
    on Jan 5, 2012

  • Forum Post: DDC264 current input ranges?

    Tom Pierce
    Hello, I am looking at the DDC264 current to digital converter chip and want to make sure I am understanding the input limits correctly. Operating in Range 3, the input range has a typical value of 150pC. If I am running at 500uS integration time, then is the current limit 150e-12 / 500e-6 = 300e...
    on Jan 23, 2012

  • Forum Post: DDC264 Cascading multiple converters

    Ron Ying
    Hello Bob or someone else, I have a question regarding the daisy-chained connection of DDC264, regarding Figure 28 and Figure 29 in the DDC264 spec (SBAS368C –MAY 2006–REVISED JULY 2011) in page 17. In Figure 29, there is a DVALID signal, and in Figure 28, there are four DVALID pins from...
    on May 10, 2012

  • Forum Post: DDC264 daisy chain configuration read timing diagram

    Ron Ying
    In DDC264 SPEC, Fig33 is the timing diagram of DDC264 configuration. We can use DOUT to read configuration register. In a daisy chained mode, can we use only the last chained DOUT to read the configuration register of 4 DDC264 devices? If yes, what is the timing diagram then?
    on Dec 7, 2012

  • Forum Post: DDC264 CLK freq at power-on?

    Ron Ying
    When we just turn on the power for DDC264 before configuration (for DDC264CK version), shall we use CLK for 40Mhz or 10Mhz before we configure Clkdiv=1? If we have to use 10Mhz for the configuration right after power-up, does this mean we have to switch to 40Mhz after configuring Clkdiv=1?
    on Dec 7, 2012

  • Forum Post: DDC264 minimum integration time and internal clock freq

    Ron Ying
    DDC264 spec says that “The minimum [integration] time scales directly with the internal clock frequency. … For the DDC264CK, with an internal clock frequency of 10MHz, the minimum time is 166us.” The question is that the “scaling” inversely linear? So if internal clock...
    on Dec 7, 2012

  • Forum Post: DDC264 Photodiode input with negative Vbias

    Mohd Zulhadi Zainal Abidin
    I currently testing the DDC264 to measure the dark current of few photodiodes (see the schematic above). The photodiodes are biased with -4V from a single supply. Is there a problem with the my schematic since the measurement I have collected seem to be gibberish. Thank you
    on Feb 21, 2013

  • Forum Post: RE: DDC264EVM

    Jason Bridgmon
    1. F8 will take you to the windows boot menu. The timing can be a little tricky, see if someone else around your office can show you when to push it. It is really necessary at this time. 2. Enumeration is the process by which the PC recognizes and identifies the attached hardware. All USB devices do...
    on Mar 22, 2013

  • Forum Post: DDC264CZAW Solder profile

    William Ham
    Hi, Is there a DDC264CZAW document describing the temperature profile for soldering this chip onto a PCB? I see that it has MSL Rating/Peak Reflow Level-3-260C-168 HR (Moisture Level 3, Peak Reflow Temperature of 260C with a 168C preheat). However I have not been able to find how long at soak ...
    on May 15, 2013

  • Forum Post: Reagrding DDC264

    hideyuki sakai
    Dear, Sir. My customer is evalating DDC264 for their system, now. It is just brief, but could you please teach us following points. 1. Data sheet, page20, Figure 33. CONV signal strobe will be needed to return to normal operation mode. Is it a time duration definition of CONV signal strobe...
    on May 16, 2013

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