Power Amplifier Power Conversion Functions in RAIL 2.x#

This section replaces AN1127: Power Amplifier Power Conversion Functions in RAIL 2.x. Further updates to this application note will be provided here.

In many wireless applications, due to limitations imposed by the transmission protocol, law, or energy constraints, it is critical to know the power output of a given device. However, this issue is complicated by the fact that output characteristics may vary drastically even for a given chip, based on the board or module onto which the chip is mounted, due to poor impedance matching, or due to parasitics. This application note outlines how to account for the variation across custom boards and applications for the Silicon Labs EFR32 family of chips. While the Proprietary Flex SDK is required for the procedures described in this document, the resulting calibration curves can be used with applications developed with Silicon Labs Connect, Zigbee, Bluetooth, and OpenThread SDKs. Customers developing with Z-Wave should refer to https://www.silabs.com/community/wireless/z-wave/knowledge-base.entry.html/2020/03/03/z-wave_700_tx_powercalibrationandadjustment-YUiB. Proprietary is supported on all EFR32FG devices. For others, check the device's data sheet under Ordering Information > Protocol Stack to see if Proprietary is supported. In Proprietary SDK version 2.7.n, Connect is not supported on EFR32xG22.