• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 16 subscribers
  • Views 921 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TS5A3159: analog switches use case on audio switching

Leo Chow
Expert 3120 points
Part Number: TS5A3159


Hi,

I have an application which is using TS5A3159DBVR to implement audio signal switching between two different sources. One of the FET channels, I have different audio sources connected to NC & NO pins respectively source selection via IN pin. In general cases when either one of the pin was engaged I would see the other pin in "Open" state & I've verified this via DMM.

However I began to notice leakage/echo across audio sources when system is turned ON for 15 mins or more. At that stage I was able to capture decaying impedance readings when that output pin should've been "Open". Are there any certain conditions which may trigger such incident whereby NC & NO exhibiting such behavior? Thanks.

Regards,

Leo

  • 0
    TI__Mastermind 45605 points

    Leo,

    When you see this decaying impedance reading over time does turning off the device and restarting it make it recover?  Do you think the device is damaged over time?

    Are the audio signals AC coupled?  The TS5A3159 device will not accept negative voltage signals and maybe a negative audio signal is causing leakage.

    The TS5A2236X device are designed for audio applications that have negative voltage signals.

    Kindly,

    Adam

  • 0 in reply to Adam Torma
    TI__Expert 3120 points
    Hi Adam,

    Yes I've only see decaying impendance when system is turned on for more than 15 minutes & restaring or rebooting helps recovery. I may need to talk again to customer to see if similar error can be replicated on other products using this device.

    Yes audio signals are AC coupled & thanks for this input!

    Regards,
    Leo