4.3 PCB Storage and Handling Recommendations
This EVM contains components that can potentially be damaged by electrostatic discharge. Always transport
and store the EVM in its supplied ESD bag when not in use. Handle using an antistatic wristband. Operate on an
antistatic work surface. For more information on proper handling, refer to
.
4.4 Heat Sink and Temperature
Users are strongly encouraged to use the xWR6843AOPEVM with the heat sink installed. Due to the smaller
size of the xWR6843AOPEVM, it is likely to get warmer than other larger sized EVMs on the mmWave Radar
portfolioso care must be taken to ensure the junction temperature does not exceed 105°C.
measurement of junction temperature versus duty cycle taken with and without the heat sink. As seen in the plot,
the EVM can safely operate up to 50% duty cycle with or without the heat sink. Although the heatsink is not
absolutely required, usage of the heat sink provides protection against exceeding the junction temperature at
higher duty cyles.
Figure 4-4. Duty Cycle versus Junction Temperature
When using the EVM for custom applications, the duty cycle can be adjusted as needed, the heat sink provided
with the kit can be used, customers can also design their own heat sink using better heat disippating materials or
one with more surface area such as addition of fins. The CAD drawing for the heat sink is shown in
xWR6843AOPEVM Rev F
50
mmWaveICBoost and Antenna Module
SWRU546D – OCTOBER 2018 – REVISED NOVEMBER 2020
Copyright © 2020 Texas Instruments Incorporated
