TDA5250D2_07 Datasheet, PDF (63/94 Pages) Infineon Technologies AG – ASK/FSK 868MHz Wireless Transceiver

TDA5250 D2
Version 1.7
Application
The DC offset compensation needs 2.2ms after Power On or Tx/Rx switch. This time is hard wired
and independent from external capacitors CC on pins 31 to 38. The maximum value for this
capacitors is 47nF.
RSSI accuracy settling time = 2.2ms + 5*RC=2.2ms+5*37k*2.2nF=2.6ms
R - internal resistor; C - external capacitor at Pin 29
Table 3-11
Cc
[nF]
220
100
47
22
10
Limiter Bandwidth
f3dB
lower limit
[Hz]
100
220
470
1000
2200
f3dB
upper
limit
IQ Filter
- ll -
- ll -
- ll -
- ll -
Comment
setup time not guaranteed
setup time not guaranteed
Eval Board
v [dB]
80
0
f_3dB
lower limit
f_3dB
IQ Filter
f_3dB
Limiter
Figure 3-23 Limiter frequency characteristics
f
limiter_char.wmf
Data Sheet
63
2007-02-26