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DAC80502: DAC80502 continuous sinusoidal 200 KHz signal

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Replies: 5

Views: 48

Part Number: DAC80502

Hi Team,

The settling time of the device given in datasheet is 3-5us for larger voltage step. Can the device generate continuous sinusoidal 5V-200kHz signal.

Regards, Shinu. 

  • Hi,

    DAC80502 cannot be used to generate a 200Khz signal, the update rate of this DAC is very low to have any meaningful sine wave.

    Still you can go ahead and try but the sine wave wont be pretty and distortion will be very bad. For more information, you can go to our precision DAC training series in which we talk about update rate and the maximum frequency of the sine wave/square wave you can generate.

    TI Precision Labs - DACs: Settling Time and Update Rate | TI.com Video

    Regards,

    AK

  • In reply to Akhilesh K:

    Thanks Akhilesh,

    Customer is using (DAC80502) dual DAC for the application and need to update both the DACs in a cycle. Each DAC requires 24 bits (0x8yyyh for 1st DAC and 0x9zzzh for second DAC). Whether can they write both the DACs at a stretch ie; keeping the CS/SYNC low, write 48 bit continuously (first 24 clocks corresponds to first DAC and second 24 clocks corresponds to second DAC) followed by pulling CS/SYNC high?

    Regards, Shinu. 

  • In reply to Shinu.V.Mathew:

    Hi Shinu,

    If customer wants to update the two DAC's at once, you can use a software LDAC to do the same.

    First enable the synchronous mode (DAC_SYNC_EN = 1), of operation and send DAC data to ch1 and Ch2. After that initiate software LDAC to update the two DAC's simultaneously.

    Regards,

    AK

  • In reply to Akhilesh K:

    Thanks Akhilesh,

  • In reply to Shinu.V.Mathew:

    Hi,

    Let me know if you need more help.

    I am closing this thread.

    Regards,

    AK