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TLV320AIC3100: ADC power down and DAC power down

Hirotaka Matsumoto
Guru 27585 points
Part Number: TLV320AIC3100


Hi all

Would you mind if we ask TLV320AIC3100?
There is the description on the datasheet P65 as follows;
"When the ADC channel is powered down, ・・・When this flag indicates power down, the MADC divider may be powered down, followed by NADC divider."

<Question1>
When the ADC channel is powered down, are MADC and NADC powered down automatically?

<Question2>
If <Question1> is correct, when the DAC channel is powered down, are MDAC and NDAC powered down automatically?

<Question3>
In relation to <Question1> and <Question2>, when PLL configuration setting changes, ADC, DAC and PLL requires to be powered down. 
Do NDAC, MDAC, NADC, MADC dividers require to be powered down individually?

<Question4>
If it requires to be powered down individually, is there any sequece between PLL's power down and NDAC/MDAC/NADC/MADC divider power down?

Kind regards,

Hirotaka Matsumoto

  • 0
    TI__Mastermind 30220 points
    Matsumoto-san,

    Q1: No, these are powered separately. NADC: P0 R18, MADC: P0 R19

    Q2: No, These are powered separately. NDAC: P0 R11, MDAC P0 R12.

    Q3. see above.

    Q4. they are required to be powered down individually, you quoted the datasheet saying this. the text you copied says the sequence is power down M, then N. doesn't matter if you power down ADC or DAC first.

    best regards,
    -Steve Wilson
  • 0 in reply to Steve-Wilson
    Guru 27585 points

    Steve san

    Thank you for your support always!

    Just in case, we would like to confirm one point.
    In relation to <Q4>, during PLL power on, is it possible to switch NDAC/MDAC/NADC and MADC's power on / off?
    As the background of this question, our customer tries to switch these power on /off to reduce power consumption in case of no singla input.

    Kind regards,

    Hirotaka Matsumoto

  • 0 in reply to Steve-Wilson
    Guru 27585 points

    Steve san

    Thank you so much for your support always!

    If you have some update for our last question, could you share us?

    Kind regards,

    Hirotaka Matsumoto

  • 0 in reply to Hirotaka Matsumoto
    TI__Mastermind 30220 points
    Matsumoto-san,

    Yes the Dividers may be powered down, but as mentioned in other threads, power down the ADC and DAC first, then power down the Dividers.

    best regards,
    -Steve Wilson