SI4460-C2A-GM Datasheet, PDF (35/53 Pages) Silicon Laboratories – HIGH-PERFORMANCE, LOW-CURRENT TRANSCEIVER

Si4463/61/60-C
5.4.1. Si4463: +20 dBm PA
The +20 dBm configuration utilizes a class-E matching configuration for all frequency bands except 169 MHz
where it uses a Square Wave match. Typical performance for the 915 MHz band for output power steps, voltage,
and temperature are shown in Figures 10–12. The output power is changed in 128 steps through PA_PWR_LVL
API. For detailed matching values, BOM, and performance at other frequencies, refer to “AN648: PA Matching”.
25
20
15
10
5
0
Ͳ5
Ͳ10
Ͳ15
Ͳ20
Ͳ25
Ͳ30
Ͳ35
Ͳ40
0
TXPowervs.PA_PWR_LVL
20
40
60
80
100
120
PA_PWR_LVL
Figure 10. +20 dBm TX Power vs. PA_PWR_LVL
TX Power vs. VDD
22
20
18
16
14
12
10
1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6
Supply Voltage (VDD)
Figure 11. +20 dBm TX Power vs. VDD
Rev 1.0
35