AX5151-TSSOP24-TU AXSEM, AX5151-TSSOP24-TU Datasheet - Page 38

• Manufacturer Part Number: AX5151-TSSOP24-TU
• Description: RF Transmitter TSSOP-Class-IC
• Manufacturer: AXSEM
• Type: Single Chip Transceiverr

Specifications of AX5151-TSSOP24-TU

• Package / Case: TSSOP-24
• Operating Frequency: 400 MHz to 940 MHz
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 2.3 V to 3.6 V
• Supply Current: 100 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

38
Application Information
7.2.
The ANTP and ANTN pins provide RF input to the LNA when AX5151 is in receive mode, and RF
output from the PA when AX5151 is in transmit mode. A small antenna can be connected
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 1.0
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
L3=L4
C3
[nH]
12
33
C2
L5
C4
[pF]
C2
2.2
3.3
C5
L6
C3=C5
[pF]
1.8
3.3
CA
L5=L6
[nH]
18
39
LB
CB
[nH]
6.2
12
LB
C6
Datasheet AX5151
CA=CB
[pF]
8.2
18
50Ω single-
ended
equipment
or antenna
C4=C6
[pF]
220
220