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TS5A23159: SNR of TS5A23159 &TS5A23160

yoshiki hasebe
Mastermind 6385 points
Part Number: TS5A23159
Other Parts Discussed in Thread: TS5A23160, , TS5A22362, TS3A227E

Dear Sirs,

My customer asked us about SNR data of TS5A23159 &TS5A23160.

He is assuming use as audio switch.

Please let me know if you have SNR data.

Best Regards,

Y.Hasebe

  • 0
    TI__Mastermind 45340 points

    Yohiki-san,

    If your application is for analog audio centered at 0V you will need to use a device that will support negative signals.  The devices you have selected will not support less than 0V.  You will need to select a device that will support negative signal like the TS5A22362 for analog audio application.

    Thank you,

    Adam

  • 0 in reply to Adam Torma
    Mastermind 6385 points

    Hello Adam-san,

    Thank you for your reply.

    I know TS5A 22362 series.
    However, this device does not have the function of Power OFFProtection.
    (This is also recognized by the answer from you the other day)
    My customers are requesting this condition and I am proposing a series of TS 5 A 23159.
    TS5A23159 has specifications of Ioff when Vcc = 0V.

    Please let me know if there are devices that support this condition and support negative signals.
    Also,please let me know about SNR.

    Best Regards,

    Y.Hasebe

  • 0 in reply to yoshiki hasebe
    TI__Mastermind 45340 points
    Hasebe,

    Today I do not know of a device that will have powered off protection and support analog audio performance. It is either one or the other.

    What is causing the need to have powered off protection in an audio application? This is an unusual combination for me.

    Adam
  • 0 in reply to Adam Torma
    Mastermind 6385 points

    Hello Adam-san,

    Thank you for  your reply.

    The customer is considering this device for input switching.
    At that time, it is possible to assume that the signal is input from the outside while the power of their products is off.
    The reason for the question is that this situation is the case where voltage is applied to the input while the device is powered off.

    How about SNR(signal to noise ratio)?

    Best Regards,

    Y.Hasebe

  • 0 in reply to yoshiki hasebe
    TI__Mastermind 45340 points
    Hasebe,

    I don't understand your request for SNR of a passive FET switch. This would be like the SNR of a PCB trace or a wire. The FET switch will not be a significant source of noise in the signal chain. Can you expand more on the definition of the SNR for a signal switch or how you are testing SNR of the switch. I may be able figure out what you are looking for with more description of the spec an concern for the signal chain?

    Thank you,
    Adam
  • 0 in reply to Adam Torma
    Mastermind 6385 points

    Hello Adam-san,

    Thank you for your reply.

    I checked datasheet of TS5A23159.

    Then I found THD measurement information as below.

    So,I thought that I could measure SNR with the same measuring circuit and asked a question.
    Also, the device TS3A227E has data that measured THD and SNR under the same conditions shown in the figure below.

    Best Regards,

    Y.Hasebe

  • 0 in reply to yoshiki hasebe
    TI__Mastermind 45340 points
    Y. Hasebe,

    Thank you for more information of what you are looking for. Unfortunately we don't have this data available to the devices in question.

    What is the customers concern that the device won't meet the SNR spec.
    What is there target?
    How will this spec effect their system?

    Maybe we can find another way to give confidence that the device will perform well in the system without having this data.

    Thank you,
    Adam
  • 0 in reply to Adam Torma
    Mastermind 6385 points

    Hello Adam-san,

    Thank you for your reply.

    I understand your comments.

    I will explain them to my customer.

    What is there target? 
    How will this spec effect their system? 

    ⇒The customer thought about a circuit without a switch at first, but he needed a switch in a hurry so it is necessary to confirm it.

    Best Regards,

    Y.Hasebe