AWR2243: Maximal VCO slope and swept bandwidth

Timofey Savelyev

Part Number: AWR2243

Dear experts,

with a super fast application in mind I am looking at the AWR2243 solution. Can you please highlight its maximal VCO slope? I cannot find it in the datasheet while TI mm-Wave Sensing Estimator v. 1.4 does not go above 100 MHz/us.

Besides it gives the possibility to sweep from 76 to 81 GHz continuously. Does that mean the chip has a single 76-81 GHz VCO?

Best regards,

Timofey

over 5 years ago

0 Ishita Kochar over 5 years ago

TI__Mastermind 31680 points

Hello Timofey,

You can find these details in the mmwave Interface Control document (ICD). Please refer to AWR_PROFILE_CONF_SB API. In AWR2243, there are 2 VCOs,

VCO1 ranges from 76-78GHz and VCO2 ranges from 76-81GHz. There is an overlap region of 76-78 GHz in which any of the VCOs can be used.

Regards,

Ishita

0 Timofey Savelyev over 5 years ago in reply to Ishita Kochar

Intellectual 590 points

Hi Ishita,

thank you for the reference. I looked into the ICD and found on p. 76 that for 76-81 GHz

1 LSB ~= 48.279 KHz/us

valid range: -2072 to 2072

Can you please help me derive the maximal VCO slope from this?

Timofey

0 Ishita Kochar over 5 years ago in reply to Timofey Savelyev

TI__Mastermind 31680 points

Hello Timofey,

As you are working on AWR2243, the valid range for that is : -5510 to 5510

As the LSB is 48.279KHz/us, the max VCO slope would be 5510 * 48.279 KHz/us = 266MHz/us. This is already mentioned in the ICD. Let me know if you have trouble finding it.

The range -2072 to 2072 is for xWR1xxx devices.

Regards,

Ishita

0 Timofey Savelyev over 5 years ago in reply to Ishita Kochar

Intellectual 590 points

Perfectly clear, thank you very much!

TI mmWave Sensing Estimator should also learn that.

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AWR2243: Maximal VCO slope and swept bandwidth