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MRF49XA-I/T датащи(PDF) 73 Page - Microchip Technology

номер детали MRF49XA-I/T
подробное описание детали  ISM Band Sub-GHz RF Transceiver
PDF  102 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MRF49XA-I/T датащи(HTML) 73 Page - Microchip Technology

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© 2009-2011 Microchip Technology Inc.
Preliminary
DS70590C-page 73
MRF49XA
4.0
APPLICATION DETAILS
The application circuit of MRF49XA with a balun circuit
is shown in Figure 4-1.
FIGURE 4-1:
APPLICATION CIRCUIT
4.1
Antenna/Balun
A balun circuit for a 50
Ω antenna is shown in
Figure 4-2. If low tolerance components (i.e., ±5%) are
used with an appropriate ground, the impedance
remains close to the 50
Ω measurement.
FIGURE 4-2:
BALUN CIRCUIT
1
2
3
4
16
15
14
13
12
11
10
9
5
6
7
8
RC 7
RC6
RC 5
RC4
RC3
RC2
RC 1
RC0
OSC 1
PIC ® MC U
C4 *
2 .2 nF
C1
2.2 u F
V DD
C3
0.01 uF
C2
(see
Table 2-2)
50 O h m Lo op
An te n n a
X1
10 M H z
* C o n n e ction s are o p tiona l.
MC L R
__ __ _
SDI
SCK
SD O
RCL K O UT /F CA P /F INT *
CL K O U T *
Ba lu n
IN T /D IO *
IR O
CS
F SK/D A T A /F S E L *
RE SE T *
+3.3V
C5
C6
50
Ω ANT
J1
L1
L2
L3
RFN
RFP
Freq.
L1
L2
L3
C5
C6
C7
433 MHz
390 nH
33 nH
47 nH
68 pF
2.7 pF
5.1 pF
868 MHz
100 nH
8.2 nH
22 nH
1.2 pF
27 pF
2.7 pF
915 MHz
100 nH
8.2 nH
22 nH
1.2 pF
27 pF
2.7 pF
C7



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