TDA5252G2 Datasheet, PDF (45/86 Pages) Infineon Technologies AG – ASK/FSK 915MHz Wireless Transceiver

TDA5252 G2
Version 1.1
Application
The evalboard has been optimized for 3V. The load is about 250+j0 at 915MHz.
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 3-9 and Figure 3-10 The total spectrum of the
evalboard can be summarized as:
Carrier fc
fc-18.1MHz
fc+18.1MHz
2^nd harmonic
3^rd harmonic
+9dBm
-69dBm
-72dBm
-45dBm
-49dBm
Figure 3-9 Transmit Spectrum 13.2GHz
Data Sheet
45
spectrum_13.2GHz.bmp
2007-02-26