MLX71120_12 Datasheet, PDF (16/31 Pages) Melexis Microelectronic Systems – FSK/FM/ASK Receiver

2.2 Standard Frequency Plans
IF2 = 455kHz
RFSEL
0
1
f_RF [MHz]
315
433.92
868.3
915
f_IF1 [MHz]
105.6067
145.2467
289.1300
304.6967
IF2 = 10.7MHz
RFSEL
0
1
f_RF [MHz]
315
433.92
868.3
915
f_IF1 [MHz]
119.2667
158.0667
282.3000
297.8667
f_LO1 [MHz]
420.6067
579.1667
579.1700
610.3033
f_LO1 [MHz]
434.2667
592.8267
586.0000
617.1333
MLX71120
300 to 930MHz
FSK/FM/ASK Receiver
f_LO2 [MHz]
105.1517
144.7917
289.5850
305.1517
f_RO [MHz]
17.525278
24.131944
24.132083
25.429306
f_LO2 [MHz]
108.5667
148.2067
293.0000
308.5667
f_RO [MHz]
18.094444
24.701111
24.416667
25.713889
2.3 433/868MHz Frequency Diversity
The receiver’s multi-band functionality can be used to operate at two different frequency bands just by
changing the logic level at pin RFSEL and without changing the crystal. This feature is applicable for com-
mon use of the 433 and 868MHz bands. Below table shows the corresponding frequency plans.
IF2 = 455kHz
RFSEL
0
1
f_RF [MHz]
433.9225
868.3
f_IF1 [MHz]
145.2483
289.1300
f_LO1 [MHz]
579.17
579.17
f_LO2 [MHz]
144.7925
289.5850
f_RO [MHz]
24.132083
39010 71120
Rev. 008
Page 16 of 31
Data Sheet
Jun/12