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Help with TAS5010

Dave Reed1
Prodigy 50 points
Other Parts Discussed in Thread: DIR9001, TAS5558

Hello everyone,

I am trying to build a PWM processor around TAS5010 and DIR9001, which uses to clock the system. However Valid_L and Valid_R goes to low and I read 3.3 V in PWM output. I set M_S (0), DBSPD (1) and MCLK_OUT(0), RESET(1),  LRCK from 96 kHz, I am using 24.576 MHz crystal with DIR9001 to provide master clock to TAS5010 (MCLK_IN). The values for PLL loop filter components are as same as in the evaluation board. However, PWM OUTUPS show 3.3V and valid_L and R are in error state. In the design is it possible to connect AVSS and DVSS directly ground?. Would that be the cause for the problem?. Your comment is highly appreciated.  

Thanks!

Dave

  • 0
    TI__Guru**** 189401 points

    Hi, Dave,

    This is a super old part. I suggest you look at one of our newer devices, say TAS5558, which are vastly improved.

    I found this old document which shows the two ground nets being isolated by a 1 ohm resistor.

    -d2

  • 0 in reply to Don Dapkus
    Prodigy 50 points

    HI Don,

    Thank you so much for your feedback. We need a simple solution to convert analog data to PWM using A/D converter and a PWM processor (TAS5010). At this point we do not want to use a micro controller in this project. Any other suggestions than TAS5010, which can be easily used without a MCU?. About the ground plane, Can the error associate with connecting analog and digital grounds together?

    Thanks!

    Dave