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  • TI Thinks Resolved

PGA411-Q1: Excitation signal setting method

Part Number: PGA411-Q1

Hi team

Excitation signal setting
: 10KHz, 5Vrms (Vp-p 14.04V) Please tell me how to set

1) Since the excitation is directly amplified by PGA411, many settings are required. Please tell me about the register setting


2) Input voltage check: adjust the excitation signal voltage level to the voltage of Vext (PIN 24). Please tell me the input voltage that will output 5Vrms

Thanks,

TM

  • Taemin,

    For 5VRMS, you will choose one of these two options (just below and just above 5VRMS):
    EXTOUT = 1
    EXTOUT_GL = F

    EXTOUT = 2
    EXTOUT_GL = 0

    For VEXT, you can choose 13V or 14V.
  • In reply to Clancy Soehren:

    Hi Clancy

    Thank you for your help.
    I have additional questions.

    EXTOUT = 1 & EXTOUT_GL = F & Supply voltage Vext = 13V
    EXTOUT = 2 & EXTOUT_GL = 0 & Supply voltage Vext = 14V
    EXTOUT = 1 & EXTOUT_GL = F & Supply voltage Vext = 14V
    EXTOUT = 2 & EXTOUT_GL = 0 & Supply voltage Vext = 13V

    Is all of the above correct?

    Thnks,
    Taemin
  • In reply to Taemin Ahn:

    Yes, that looks correct.

    MODEVEXT = 3 for VEXT = 13V
    MODEVEXT = 4 for VEXT = 14V

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