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MLX71122 Datasheet(PDF) 20 Page - Melexis Microelectronic Systems

Part # MLX71122
Description  300 to 930MHz FSK/FM/ASK Receiver
PDF  59 Pages
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Manufacturer  MELEXIS [Melexis Microelectronic Systems]
Direct Link  http://www.melexis.com
Logo MELEXIS - Melexis Microelectronic Systems

MLX71122 Datasheet(HTML) 20 Page - Melexis Microelectronic Systems

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MLX71122
300 to 930MHz FSK/FM/ASK Receiver
Datasheet
REVISION 014 – AUGUST, 2016
Page 20 of 59
390 10 71122 01
1
N
f
N
f
f
LO2
IF2
LO2
RF
IF1
5
8MHz
f
f
RF
IF1
(13)
Finally N and A can be calculated with equation (6).
3.1.4. Counter Setting Examples for SPI Mode
To provide some examples, the following table shows some counter settings for the reception of the well-
known ISM and SRD frequency bands. The channel spacing is assumed to be fCH = 100kHz. In below table all
frequency units are in MHz.
Inj
fRF
fIF1
fLO1
Ntot
N
P
A
fPFD
R
fREF
fLO2
fIF2
h-h
300
97.3
397.3
2980
93
32
4
0.133
75
10
99.3
2
h-h
315
102.3
417.3
3130
97
32
26
0.133
75
10
104.3
2
h-h
434
142
576
4320
135
32
0
0.133
75
10
144
2
h-h
470
154
624
4680
146
32
8
0.133
75
10
156
2
l-l
850
171.6
678.4
8480
256
32
0
0.08
125
10
169.6
2
l-l
868
175.2
692.8
8660
270
32
20
0.08
125
10
173.2
2
l-l
915
184.6
730.4
9130
285
32
10
0.08
125
10
182.6
2
l-l
930
187.6
742.4
9280
290
32
0
0.08
125
10
185.6
2
3.1.5. Counter Settings in ABC Mode – 8+1 Preconfigured Channels
In ABC mode (SPISEL=0), the counter settings are hard-wired. In below table all frequency units are in MHz.
CH
Inj
fRF
fIF1
fLO1
Ntot
N
P
A
fPFD
R
fREF
fLO2
fIF2
1
h-l
369.5 125.8 495.3 3715
116
32
3
0.133 75
10
123.8 2
2
h-l
371.1 126.4 497.5 3731
116
32
19
0.133 75
10
124.4 2
3
h-l
375.3 127.8 503.1 3773
117
32
29
0.133 75
10
125.8 2
4
h-l
376.9 128.3 505.2 3789
118
32
13
0.133 75
10
126.3 2
5
h-l
384.0 130.7 514.7 3860
120
32
20
0.133 75
10
128.7 2
6
h-l
388.3 132.1 520.4 3903
121
32
31
0.133 75
10
130.1 2
7
h-l
391.5 133.2 524.7 3935
122
32
31
0.133 75
10
131.2 2
8
h-l
394.3 134.1 528.4 3963
123
32
27
0.133 75
10
132.1 2
9
h-l
395.9 134.6 530.5 3979
124
32
11
0.133 75
10
132.6 2



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