TDA5252XT Infineon Technologies, TDA5252XT Datasheet - Page 41
TDA5252XT
Manufacturer Part Number
TDA5252XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.TDA5252XT.pdf
(86 pages)
Specifications of TDA5252XT
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Product Depth (mm)
4.4mm
Product Length (mm)
9.7mm
Operating Supply Voltage (min)
2.1V
Operating Supply Voltage (max)
5.5V
Lead Free Status / Rohs Status
Compliant
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Figure 3-4
R1 does not influence the matching because of its very high resistance. Due to the large
capacitance of C1, C6 and C5 the circuit can be further simplified for RF:
Figure 3-5
The LNA-matching is RF-grounded now, so no power is lost in the LNA-input. The PA-matching
consists of C2, C3 L2, C4 and L1.
When designing the matching of the PA, C2 must not be changed anymore because its value is
already fixed by the LNA-input-matching.
Data Sheet
TX_Mode
TX_Mode_simplified
RX/TX-pin of IC)
SMA-connector
(with jumper or
SMA-connector
grounded
50 Ohm
RF I/O
50 Ohm
RF I/O
RX/TX
C2
C2
C1
R1
C6
C7
C7
C3
C3
41
L3
L3
L2
L2
C9
C9
C4
C4
L1
C10
L1
C10
VCC
C5
RX/TX
LNI
PA
LNIX
LNI
LNIX
PA
TDA5252 G2
TX_Mode_simplified.wmf
Version 1.1
Application
2007-02-26
TX_Mode.wmf
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