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Original question:

DAC60508: need dac60508's register configture description document

DAC80508：Recommend suitable DAC chip

yue wang
Prodigy 100 points

Part Number: DAC80508

Hello！

I want to buy a DAC. The condition is that it can output millivolt level voltage, such as 4MV, and the frequency is 100Hz. Is there a suitable DAC recommended?

At present, I have a dac80508 evaluation board, but I found that there is conduction between vio and ground, so I guess there may be a problem with the board. So I would like to ask your company to meet the above requirements, is there a suitable DAC device recommended? Or can I just buy a new dac80508? Can accuracy requirements be met?

Looking forward to receiving your reply.

Thanks!

  • 0
    TI__Expert 4130 points

    Hi ,

    Thanks for reaching out us. please let me know you application requirements

    1. What is you full scale requirements ?  Are you going to generate 4mV, 100 Hz signal ?  or 4 mV is resolution ?

    2. DAC80508 has 8 channel device , your application need 8 channel ?

  • 0 in reply to Anbu Mani
    Prodigy 100 points

    Thank you for your reply！

    DAC chip needs to realize the following parts: the stimulation voltage is 4MV, the frequency is 100Hz, and the duration is 1s. It is mainly used for nerve electrical stimulation in mice, and eight channels should be available. Do you have a suitable recommendation?

    Best wishes!

  • 0 in reply to yue wang
    TI__Expert 4130 points

    Hi,

    4mV, 100Hz signal can be consider DAC80508.

    since it very low amplitude what is noise spec you looking for this application? and simulation type is sine wave, square or any specific pattern.

  • 0 in reply to Anbu Mani
    Prodigy 100 points

    I'm sorry to get back to you so late.

    The information I know now is that the stimulation volt age is several millivolts, which is transmitted in the form of pulse. The pulse width is about 1.5ms. Can it be understood as a square wave type? There should be no specific requirements for noise specifications. Of course, the lower the noise, the better, because it is used for electrical stimulation of brain slices in culture medium. Do you think dac80508 is suitable? In addition, can the Vdd and vio required by DAC chip be 3.3V? Can I use battery power?

  • +1 in reply to yue wang
    TI__Expert 4130 points

    Hi Yue wang,

    1. Yes, DAC80508 consumes low current of 0.6 mA/channel at 5.5 V, making it suitable for battery-operated equipment. A per-channel powerdown feature reduces the device current consumption to 15 µA.

    2. VDD and VIO can be 3.3 V.

    Thanks 

    Anbu M