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TPA6130A2, interface doc

Pra
Genius 11085 points
We are using TPA6130A2RTJT headphone amp with I2c volume control. Which need to be interfaced at 1.8V omap 35x i2c. can it be done without level shifter? Please let send us an app note if you have.
Regards,
Pra.
  • 0
    TI__Guru**** 189399 points

    Hi, Pra,

     

    That is a really good question!

     

    Luckily, we designed this project to seamlessly mate up with low-voltage devices like OMAP35x!

     

    If you look at page 4 of the data sheet, in the "Recommended Operating Conditions" table, you will see the VIH and VIL of the SDA and SCL terminals have been specified at 1.3V and 0.6V.

     

    -d2

  • 0 in reply to Don Dapkus
    TI__Genius 11085 points

    Hi Don,

    1.3v is min and will that be sufficient for I2c Handling? We have tested several boards with this level and found I2c response from the device is inconsistent.
    That is why , we had placed the level shifter, along with this, in case of issues in the device and vdd gets short with Ios, then Whole VDD will pump on to 65930 and may damage the device as well. once 65930 misbehaves then what will happen to Omap?

    Regards,
    Pra.