ax5051 AXSEM, ax5051 Datasheet - Page 38

• Manufacturer Part Number: ax5051
• Description: Ax5051 Radio
• Manufacturer: AXSEM

38
Application Information
7.2.
The ANTP and ANTN pins provide RF input to the LNA when
output from the PA when
with an optional translation network. The network must provide DC power to the PA and
LNA. A biasing to VREG is necessary.
Beside biasing and impedance matching, the proposed networks also provide low pass
filtering to limit spurious emission.
Single-Ended Antenna Interface
Frequency
Band
868 / 915 MHz
433 MHz
Version 1.6
IC Antenna
Pins
Antenna Interface Circuitry
L1
L2
VDD
VDD
Figure 5 Structure of the antenna interface to 50 Ω single-ended equipment or antenna
C1
L1=L2
[nH]
18
33
[pF]
2.2
C1
L3
3
L4
AX5051
L3=L4
C3
[nH]
12
33
is in transmit mode. A small antenna can be connected
C2
L5
C4
[pF]
C2
2.2
3.3
C5
L6
C3=C5
[pF]
1.8
3.3
CA
AX5051
L5=L6
[nH]
18
39
LB
CB
is in receive mode, and RF
[nH]
6.2
12
LB
C6
Datasheet AX5051
CA=CB
[pF]
8.2
18
50Ω single-
ended
equipment
or antenna
C4=C6
[pF]
220
220