
TH71112
868/915MHz
FSK/ASK Receiver
4.1.2
Standard FSK Component List
Part
C1
C3
C4
C5
C7
C8
C9
C10
C11
C12
C15
Size
0805
0603
0603
0603
0603
0603
0603
0603
0603
0805
0805
Value
@ 868.3 MHz
22 pF
1 nF
4.7 pF
2.7 pF
1.0 pF
22 pF
33 nF
1 nF
1 nF
10 pF
100 pF
Tolerance
± 5%
± 10%
± 5%
± 5%
± 5%
± 5%
± 10%
± 10%
± 10%
± 5%
± 5%
Description
crystal series capacitor
loop filter capacitor
capacitor to match SAW filter input
capacitor to match SAW filter output
MIX1 input matching capacitor
IF1 tank capacitor
IFA feedback capacitor
IFA feedback capacitor
IFA feedback capacitor
DEMOD phase-shift capacitor
demodulator output low-pass capacitor,
this value for data rates < 20 kbps NRZ
C16
C17
R1
R2
R4
R5
L1
L2
L3
0805
0805
0603
0603
0805
0805
0603
0603
0603
1.5 nF
10 nF
10 k ?
330 ?
330 k ?
220 k ?
22 nH
22 nH
10 nH
± 10%
± 10%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
RSSI output low-pass capacitor
data slicer capacitor, this value for data rates > 0.8 kbps NRZ
loop filter resistor
optional CERFIL output matching resistor
data slicer resistor
loading resistor
SAW filter matching inductor from Würth-Elektronik
(WE-KI series), or equivalent part
LNA output tank inductor from Würth-Elektronik (WE-KI series),
or equivalent part
L4
L5
XTAL
SAWFIL
0805
0805
SMD
6x3.5
SMD
100 nH
100 nH
25.22353 MHz
@ RF = 868.3 MHz
SAFCC868MSL0X00
± 5%
± 5%
± 25ppm cal.
± 30ppm temp.
B 3dB = 2 MHz
IF1 tank inductor from Würth-Elektronik (WE-KI series)
or equivalent part
fundamental-mode crystal from
Telcona/Horizon or equivalent par
low-loss SAW filter from Murata, or equivalent part
3x3
(f 0 =868.3 MHz)
CERFIL
SMD
SFECF10M7HA00
B 3dB = 180 kHz
ceramic filter from Murata, or equivalent part
3.45x3.1
CERDIS
SMD
CDSCB10M7GA135
ceramic discriminator from Murata, or equivalent part
4.5x2
?
For component values for other frequencies, please refer to the EVB descriptions
39010 71112
Rev. 016
Page 13 of 20
Data Sheet
Jun/12