TDA5255XT Infineon Technologies, TDA5255XT Datasheet - Page 45
TDA5255XT
Manufacturer Part Number
TDA5255XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.TDA5255XT.pdf
(91 pages)
Specifications of TDA5255XT
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 3-9
Above you can see the measurement of the evalboard with a span of 200MHz. The evalboard has
been optimized for 3V. The load is about 250+j0 at 434,2MHz.
A tuning-free realization requires a careful design of the components within the matching network.
A simple linear CAE-tool will help to see the influence of tolerances of matching components.
Suppression of spurious harmonics may require some additional filtering within the antenna
matching circuit. Both can be seen in Figure 3-10 and Figure 3-11 The total spectrum of the
evalboard can be summarized as:
Data Sheet
Carrier fc
fc-18.1MHz
fc+18.1MHz
2
3
nd
rd
harmonic
harmonic
Sparam_measured_200M
+9dBm
-71dBm
-45dBm
-48dBm
-71dBm
45
Sparam_measured_434.pcx
TDA5255 E1
Version 1.2
Application
2007-02-26
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