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TLV320AIC3204: AIC3204 HP output swing

Harry Ma
Intellectual 2720 points
Part Number: TLV320AIC3204


Hi Team

customer hope can get 3.3Vpp swing in HP out. the HP driver is running directly from LDOIN(3.3V), and set register: Page 1, register 10, bit D5-D4 to adjust common mode voltage as 1.65V.

but they can't get 3.3Vpp swing the swing only can reach 1.6V.

can you help to provide

  • the register configuration for this requirement,
  • the output scope waves on EVM with you configuration.

Thanks!

  • 0
    TI__Mastermind 29765 points

    Hi,

    Attached is the setting for HP differential that will give the 0dB Full scale of 1.778Vrms per the spec.

    This is with 32 Ohm load.

    Fullscreen HP_Differential_LDOIN.txt Download 
    w 30 00 00
w 30 01 01
w 30 00 00
w 30 0B 81 82
w 30 00 00
w 30 3C 08
w 30 00 01
w 30 01 08
w 30 02 00
w 30 7B 01
w 30 00 01
w 30 14 25
w 30 0C 08 10
w 30 09 30
w 30 0A 33
w 30 10 05 05
w 30 12 05 05
w 30 00 00
w 30 41 00 00
w 30 3F D6
w 30 40 00

    Regards.

  • 0 in reply to pdjuandi
    TI__Intellectual 2720 points

    Thanks Pdjuandi

    For your  configuration reference. there are some question:

    1. for some registers, there are two number.  like 0B 81 82. which one should be write in the register 0B?

    2. the number following the register is Hex or Dec?

  • 0 in reply to Harry Ma
    TI__Mastermind 29765 points

    When there are 2 numbers, the next one is for the next register address.

    For example w 30 0B 81 82 is the same as writing w 30 0B 81 and w 30 0C 82.

    These are all hex numbers.