• State Resolved
  • Locked Locked
  • Replies 7 replies
  • Answers 1 answer
  • Subscribers 29 subscribers
  • Views 1409 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.

TLV320DAC3100: Is TLV320DAC3100 be suitable for this speaker?

Sulyn ZHANG
Expert 8700 points
Part Number: TLV320DAC3100


Hi Team,

My customer plan to find suitable Audio DAC, the speaker specifics are showed as below, can you help check if our TLV320DAC3100 can meet the requirement? Thanks a lot!

Best regards,

Sulyn

  • 0
    TI__Guru** 110945 points
    Hi Sulyn,

    From the specs I see that the speaker impedance is 8 ohm. This is fine if you will use the Class-D amplifier to drive this speaker, it supports load impedance down to 4 ohm.
    Also from spec I see that power is 700mW and max 1W. You can use the lowest Class-D gain setting, which is 6dB and you can also add some attenuation, if necessary, by using the Analog Attenuation control that goes from 0dB to -78dB. These recommendations are to stay in a safe zone of output power for the speaker.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators
  • 0 in reply to Ivan Salazar
    TI__Expert 8700 points
    Hi Ivan,
    Thanks a lot for your support! So that means TLV320DAC3100 will be ok for customer to use, correct?

    Best regards,
    Sulyn Zhang
  • 0 in reply to Sulyn ZHANG
    TI__Guru** 110945 points
    Hi Sulyn,

    Yes, TLV320DAC3100 should be OK to use.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators
  • 0 in reply to Ivan Salazar
    TI__Expert 8700 points

    Hi Ivan,

    Thanks a lot for the support for this Design In! 

    Customer’s application is Portable device and TLV320DAC3100 is used for drive the Speaker, customer don’t need microphone function. Customer just finished the schematic and need your kindly support to review as below and these are some questions from customer:

    1. What’s the HPR and HPL pins for, does customer need to use them? If they don’t need to use, how to connect these two pins?

    2. Should the MICDET pin be floated?

    3. AIN1 and AIN2 is used for Microphone purpose? If customer don’t use these pins, how to connect these pins?

    4. For the power up sequence, customer will use 4.4V for SPKVDD, 1.8V for DVDD and 3.3V for other rails. If they power up 4.4V firstly, and then 3.3V and then 1.8V, is this ok?

    5. Since customer just want to use the speaker driver function, does customer need all the digital interfaces: DIN, WCLK, BCLK, MCLK, SDA, SCL total 6 pins here? Customer want to use the minimum number of digital interfaces if possible, pls suggest, thanks!

     

    Thanks a lot for your support!

     

    Best regards,

    Sulyn Zhang

  • 0 in reply to Sulyn ZHANG
    TI__Guru** 110945 points
    Sulyn,

    1. HPR and HPL are headphone outputs. They can leave them floating if not used.
    2. If the functionality of VOL/MICDET pins is not used it can be left floating.
    3. AIN1/AIN2 are analog inputs, you can use them to connect a mic or other analog audio source. If not used you can leave these pins floating or connect them to GND with 0.1uF capacitors.
    4. Customer can try this power up sequence, it is almost in line with the recommendations. The recommendation is to separate digital and analog activity. This is present in data sheet section 8.
    5. SDA and SCL are required, as these pins are the I2C bus that is used to communicate and program the device. Regarding the I2S bus: DIN, WCLK and BCLK are required, only MCLK is not required; the input for clock generation can be configured to use MCLK, BCLK, GPIO1 or DIN.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators
  • 0 in reply to Ivan Salazar
    TI__Expert 8700 points

    Hi Ivan,

    Thanks for your support! Now customer need to send out the PCB very soon. Can you pls help double confirm the schematic and questions:

    They want to confirm if below connection(highlighted in red) is correct or not? Especially the SAI1_TX_SYNC connect to WCLK, is it correct?

    The CPU customer used is IMX6ULRM, below is the Audio interface part in CPU's datasheet:

    Thanks a lot!

    Sulyn

  • 0 in reply to Sulyn ZHANG
    TI__Guru** 110945 points
    Hi Sulyn,

    According to the description shown in the second picture, I would say that the connections are fine. The sync seems to be the frame clock, which is usually the word clock. If you want to confirm it you can see both BCLK and SYNC signals in an oscilloscope and there should be some BCLK pulses in each state of SYNC pulse. The number of BCLK pulses is the word length.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators