SPRACV2 November 2020 AWR1843 , AWR2243
Assuming that Tfactory = 25C, Temperature Correction LUT (Tpresent) at Tpresent = -40C, 25C, 85C, 130C for AWR2243 is provided in Table 9 in the Appendix section. The same are provided in the form of graphs in Figure 3-4. These are derived from evaluation of a few nominal process based devices in TI labs. The evaluation was carried out on a radar system with waveguide loopback connecting TXs to RXs. The LUTs are provided separately for 76-77 GHz band and 77-81 GHz band for TX1, to capture slight differences across RF frequencies. The LUT for any temperature is indexed with 0 to 63, corresponding to the 6 bit phase shift index and the output is the correction in the phase angle that is needed. Linear interpolation/extrapolation can be used for other temperatures if needed. The data shown below is measured with a single TX been ON at a time. If multiple TXs are ON at the same time the Tx-Tx antenna coupling could cause secondary impact on phase.