TDA5250D2_07 INFINEON [Infineon Technologies AG], TDA5250D2_07 Datasheet - Page 62

• Manufacturer Part Number: TDA5250D2_07
• Description: ASK/FSK 868MHz Wireless Transceiver
• Manufacturer: INFINEON [Infineon Technologies AG]

Table 3-10
3.5
The I/Q Limiters are DC coupled multistage amplifiers with offset-compensating feedback circuit
and an overall gain of approximately 80dB each in the frequency range of 100Hz up to 350kHz.
Receive Signal Strength Indicator (RSSI) generators are included in both limiters which produce DC
voltages that are directly proportional to the input signal level in the respective channels. The
resulting I- and Q-channel RSSI-signals are summed to the nominal RSSI signal.
Figure 3-22
Data Sheet
D7
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Q- Filter
I- Filter
C
Limiter and RSSI
c
3dB cutoff frequencies Data Filter
D6
Limiter and Pinning
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
f g
f g
38
37
C
c
D5
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
36
35
C
c
D4
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
34
Limiter
Limiter
Q
I
33
62
C
c
32
nominal f
31
Quadr.
Quadr.
Corr.
7 (default)
Corr.
C
RSSI
102
11
14
18
23
28
32
39
49
55
64
73
86
-3dB
5
9
in kHz
29
Σ
RSSI
TDA5250 D2
Version 1.7
Application
37k
2007-02-26
limiter input.wmf