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AWR1243BOOST: LDO Bypass with ES3.0

mmUser
Prodigy 145 points
Part Number: AWR1243BOOST
Other Parts Discussed in Thread: DCA1000EVM, , AWR1243
I am using an ES3.0 AWR1243BOOST with a DCA1000EVM and mmWave Studio 2.0.0.2.
System setup and data acquisition are working properly.
The RevB version of AWR1243BOOST with ES3.0 has a PMIC that provides 1.0 V to VIN_13RF1 and VIN_13RF2.
It also has those AWR1243 inputs directly connected to the AWR1243 VOUT_PA pin.
I assume this is to support simultaneous 3 TX operation, as described in the AWR1243 data sheet, page 15.
The mmWave Studio User's Guide, page 24, says the RF LDO Bypass Enable and PA LDO I/P Disable check boxes should not be checked, whereas the AWR1243 ICD, version 0.98, page 133,
says: "VIN 13RF2 is shorted to VOUT PA on the board and the PA LDO should be disabled"
Question 1:
What are the proper RF LDO Bypass Enable and PA LDO I/P Disable settings in the
StaticConfig tab in mmWave Studio 2.0.0.2 for AWR1243BOOST ES3.0?
Question 2:
The AWR1243BOOST, Rev B with ES3.0 meets the simultaneous 3 TX requirements listed in the AWR1243 data sheet.
Does the AWR1243BOOST, Rev B with ES3.0 support simultaneous 3 TX operation?
Thank you,
mmUser
  • 0
    TI__Genius 15005 points

    Hi mmUser,

    The AWR1243BOOST Rev B does not by itself support simultaneous 3 TX operation.

    Simultaneous 3 TX operation is only supported in the AWR1243P - an EVM for this part is not currently available, but it is a drop-in replacement to the AWR1243 ES3.0 part on the AWR1243BOOST Rev B EVM.

    For proper operation of the Rev B board, you need to select the "RF LDO Bypass Enable" option as in the following screenshot.

    Best Regards,

    Anand

  • 0 in reply to Anand Gadiyar
    Prodigy 145 points

    Hi Anand,

    Thank you for your quick reply.

    Regarding the LDO settings, your suggestion doesn't seem to match the ICD, page 133. For the Rev B AWR1243BOOST, the schematics show that VIN_13RF1, VIN_13RF2, and VOUT_PA are all connected to the PMIC 1.0 V output. That matches the third USECASE in Table 5.63 suggesting that both LDO boxes should be checked. Please let me know if I'm interpreting that incorrectly.

    Regarding 3 TX operation, is TI planning to offer an AWR1243BOOST with the AWR1243p? If so, do you know the proposed schedule?

    Thank you,

    mmUser

  • 0 in reply to Anand Gadiyar
    Prodigy 145 points
    See follow up description
  • 0 in reply to mmUser
    TI__Genius 15005 points
    Hi mmUser,

    You're correct - The PA LDO I/P disable also has to be selected for the Rev B boards.

    Best Regards,
    Anand