TDA5250D2 Datasheet, PDF (65/97 Pages) Infineon Technologies AG – ASK/FSK 868MHz Wireless Transceiver

confidential
TDA 5250 D2
preliminary
Applications
effective channel bandwidth
-f
3dB^f
IQ Filter
f_3dB
IQ Filter
Figure 4-21 IQ Filter and frequency characteristics of the receive system
f
iq_char.wmf
4.4 Data Filter
The Data-Filter should be set to values corresponding to the bandwidth of the
transmitted Data signal via the D4 to D7 bits of the LPF register (subaddress
03H).
Table 4-10 3dB cutoff frequencies Data Filter
D7
D6
D5
D4
nominal f_-3dB in kHz
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
5
7 (default)
9
11
14
18
23
28
32
39
49
55
64
73
86
102
Wireless Components
4 - 25
Specification, July 2002