SI4464 Datasheet, PDF (37/56 Pages) Silicon Laboratories – HIGH-PERFORMANCE

Si4464/63/61/60
5.4.2. Si4461 +16 dBm PA
The Si4461 PA can utilize different matches to optimize the performance for 16, 14, 13 dBm, or a lower power. A
class-E match is recommended for 16 dBm to maximize the efficiency and battery life. For 13 and 14 dBm, a
switched current match is recommended to provide optimal performance over VDD and temperature variation.
Typical performance for the 900 MHz band for output power steps, voltage, and temperature are shown in Figures
13 and 14. The output power is changed in 128 steps through the PA_PWR_LVL API. For detailed matching
values, BOM, and performance at other frequencies, refer to “AN627: Si4460/61 Low-Power PA Matching.
Figure 13. +13 dBm TX Power vs. PA_PWR_LVL
Figure 14. +13 dBm TX Power vs. Supply Voltage (VDD)
Rev 1.2
37