User's Manual

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4.2.2 Immunity to external spurious and interferences
The BT radio can be perturbed by external high amplitude radiofrequency fields. In this case, the BT
may show high bit error rate for example.
To improve the immunity of the BTDB, we will foresee a soldered shield, for risk mitigation. In our
application, there are no nearby emitters (like WIFI or GSM a few centimeters far from the BT radio).
Neither TI, nor Broadcom put a shield by default in their implementations.
The shield will be the one which is on the reference design (16.5 x 16.5mm), if this is not limiting
size reduction.
4.2.3 Quality of supply
The radio is sensitive to wideband noise on the power supply.
The CC2564 integrates high rejection linear regulators, able to provide a clean supply from typically
battery voltage with high voltage dips.
Voltage dips are allowed up to 400mV for a duration less than 2.3ms. This means that no special
care needs to be taken when feeding the board with 3.3V (on mother board).