SWRZ166 November   2024 AWR2944P

 

  1.   1
  2. 1Introduction
  3. 2Device Nomenclature
  4. 3Device Markings
  5. 4Advisory to Silicon Variant / Revision Map
  6. 5Known Design Exceptions to Functional Specifications
    1.     MSS#25
    2.     MSS#27
    3.     MSS#28
    4.     MSS#29
    5.     MSS#30
    6.     MSS#33
    7.     MSS#40
    8. 5.1  MSS#49
    9. 5.2  MSS#52
    10. 5.3  MSS#53
    11. 5.4  MSS#54
    12. 5.5  MSS#55
    13. 5.6  MSS#56
    14. 5.7  MSS#57
    15. 5.8  MSS#61
    16. 5.9  MSS#62
    17.     MSS#66
    18. 5.10 MSS#67
    19. 5.11 ANA#12A
    20.     ANA#37A
    21.     ANA#39
    22.     ANA#43
    23.     ANA#44
    24.     ANA#45
    25.     ANA#46
    26.     ANA#47
  7.   Trademarks
  8.   Revision History

ANA#46

Spurs caused due to data transfer activity

Revision(s) Affected:

AWR2944P, AWR2E44P

Description:

Digital activity related to ADC data transfer between subsystems inside the chip can potentially create spurious tones in the signal due to undesired intra-chip parasitic coupling to RF. This coupling has been observed to cause weak spurs at 5.17MHz, 8.82 MHz and 10.71MHz offsets. The spur in the Rx data would be seen at the spur frequency offset around a strong object.

Workaround(s):

The start time of data transfer from ADCBUF can be configured to have a random value across chirps. This helps to spread the spur across doppler bins and reduce spur level by ~15dB.