Si1000/1/2/3/4/5
1.1. Typical Connection Diagram
The application shown in Figure 1.7 is designed for a system with a TX/RX direct-tie configuration without
the use of a TX/RX switch. Most lower power applications will use this configuration. A complete direct-tie
reference design is available from Silicon Laboratories applications support.
For applications seeking improved performance in the presence of multipath fading, antenna diversity can
be used. Antenna diversity support is integrated into the EZRadioPRO transceiver and can improve the
system link budget by 8–10 dB in the presence of these fading conditions, resulting in substantial range
increases. A complete Antenna Diversity reference design is available from Silicon Laboratories applica-
tions support.
supply voltage
X1
30MHz
C6
C7
C8
1u
100p
100n
L1
VDD_RF
VDD_MCU
VDD_DIG
L2
TX
Px.x
L4
C3
L3
C2
C1
RFp
Si100x
RXn
C4
0.1 uF
0.1 uF
L6
L5
C9
1u
C5
Programmable load capacitors for X1 are integrated.
L1-L6 and C1-C5 values depend on frequency band, antenna
impedance, output power and supply voltage range.
Figure 1.7. Si1002/3 RX/TX Direct-tie Application Example
Supply Voltage
X1
30 MHz
C6
C7
C8
1 u
100 p
100 n
L1
VDD_RF
VDD_MCU
VDD_DIG
TR & ANT-DIV
Switch
L3
L2
TX
Px.x
C1
C3
C2
RXp
1
6
5
4
Si100x
RXn
2
3
C4
0.1 uF
0.1 uF
L4
C9
1u
C5
Programmable load capacitors for X1 are
integrated.
L1–L4 and C1–C5 values depend on frequency
band, antenna impedance, output power, and
supply voltage range.
Figure 1.8. Si1000/1 Antenna Diversity Application Example
20
Rev. 1.0
SILICON [ SILICON ]
