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MICRF405 Datasheet(PDF) 25 Page - Micrel Semiconductor

Part # MICRF405
Description  290MHz-980MHz ISM Band ASK / FSK Transmitter
PDF  46 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MICRF405 Datasheet(HTML) 25 Page - Micrel Semiconductor

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Micrel
MICRF405
April 2006
25
M9999-041906
(408) 955-1690
Table 17. External Loop Filter Values.
C3
C1
CPOUT, pin 20
C2
R1
R2
VARIN, pin 21
C1
CPOUT, pin 20
C2
R1
VARIN, pin 21
C3
47nF
a)
b)
C3
CP, internal
C2
VARIN, internal
c)
R3
R1
CP, internal
Vref
-
+
C1
Figure 11. Loop filter for: a) Closed Loop Modulation, b) Open Loop Modulation and c) Internal Dual Path Filter.
Mod.
Type
Freq
[MHz]
Baud
Rate
[kbaud/
sec]
Coding
PLL
BW
[kHz]
Phase
margin
[
°]
Phase
detector
Freq.
[kHz]
C1
[nF]
C2
[nF]
R1
[k
Ω]
R2
[k
Ω]
C3
[pF]
VCO
All
> 30
Manchester
0.8
56
100
10
100
6.2
-
-
VCO
All
> 100
Manchester
3.0
56
100
0.68
68
27
-
-
Divider
315
< 20
DC-free
17
60
500
0.068
6.8
30
75
12
Divider
433
< 20
DC-free
18
60
500
0.068
6.8
30
75
12
Divider
868
< 15
DC-free
20
51
700
0.082
4.7
27
75
18
Divider
915
< 20
DC-free
21
60
500
0.047
4.7
36
91
5.6
Open
loop
All
< 200
DC-free
26
56
500
0.047
0.47
43
NC
33000



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