Si4421 typical performance characteristics, Channel selectivity and blocking – Silicon Laboratories SI4421 User Manual
Page 36
Si4421
TYPICAL PERFORMANCE CHARACTERISTICS
Channel Selectivity and Blocking:
0
10
20
30
40
50
60
70
80
90
0
1
2
3
4
5
6
7
8
9
10
11
12
CW interferer offset from carrier [MHz]
434 MHz
868 MHz
ETSI
Note:
LNA gain maximum, filter bandwidth 67 kHz, data rate 9.6 kbps, AFC switched off, FSK deviation ± 45 kHz, V
dd
= 2.7 V
Measured according to the descriptions in the ETSI Standard EN 300 220-1 v2.1.1 (2006-01 Final Draft), section 9
The ETSI limit given in the figure is drawn by taking -106dBm at 9.6kbps typical sensitivity into account, and corresponds to
receiver class 2 requirements (section 4.1.1)
Phase Noise Performance in the 433, 868 and 915 MHz Bands:
433 MHz
868 MHz
915 MHz
(Measured under typical conditions: T
op
= 27
o
C; V
dd
= V
oc
= 2.7 V)
36