ax5031 AXSEM, ax5031 Datasheet - Page 31

• Manufacturer Part Number: ax5031
• Description: Datasheet Ax5031
• Manufacturer: AXSEM

7.2.
A small antenna can be directly connected to the
optional translation network. The network must provide DC power to the PA. A biasing to
VREG is necessary.
Beside biasing and impedance matching, the proposed network also provides low pass
filtering to limit spurious emission.
Single-Ended Antenna Interface
Frequency
Band
868 / 915 MHz
433 MHz
7.3.
The
VREG from the voltage applied at VDD_IO. Use VREG to supply all the VDD supply pins.
Version 1.3
IC Antenna
Pins
AX5031
Antenna Interface Circuitry
Voltage Regulator
L1
L2
VREG
VREG
Figure 7 Structure of the antenna interface to 50Ω single-ended equipment or antenna
has an integrated voltage regulator which generates a stable supply voltage
C1
L1=L2
[nH]
33
39
[pF]
2.2
C1
L3
3
L4
L3=L4
C3
[nH]
12
33
C2
L5
C4
[pF]
2.2
3.3
C2
C5
L6
C3=C5
[pF]
1.8
3.3
AX5031
CA
L5=L6
[nH]
18
39
ANTP and ANTN pins with an
LB
CB
Application Information
[nH]
6.2
12
LB
C6
CA=CB
Datasheet AX5031
[pF]
8.2
18
50Ω single-
ended
equipment
or antenna
C4=C6
[pF]
150
150
31