tda5255e1 Infineon Technologies Corporation, tda5255e1 Datasheet - Page 61

• Manufacturer Part Number: tda5255e1
• Description: Ask/fsk 434mhz Wireless Transceiver
• Manufacturer: Infineon Technologies Corporation

Confidential
The DC offset compensation needs 2.2ms after Power On or Tx/Rx switch. This time is hard wired
and independent from external capacitors C C 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
Figure 3-23
Preliminary Specification
[nF]
220
100
Cc
47
22
10
Limiter Bandwidth
Limiter frequency characteristics
80
0
v [dB]
lower limit
lower limit
f
3dB
f3dB
1000
[Hz]
100
220
470
2200
IQ Filter
61
f
IQ Filter
3dB
upper
f3dB
limit
- ll -
- ll -
- ll -
- ll -
Limiter
f
3dB
setup time not guaranteed
setup time not guaranteed
Eval Board
Comment
f
TDA5255 E1
Version 1.1
Application
2002-11-28
limiter_char.wmf