TH71111
868/915MHz
FSK/FM/ASK Receiver
4.3.2
Part
FM Component List
Value
Size
Tolerance
Description
@ 868.3 MHz
C1
C3
0805
0805
0603
0603
0603
0805
0603
0603
0805
0805
22 pF
1 nF
crystal series capacitor
loop filter capacitor
±5%
±10%
±5%
C4
4.7 pF
2.7 pF
1.0 pF
33 nF
1 nF
capacitor to match SAW filter input
capacitor to match SAW filter output
MIX1 input matching capacitor
IFA feedback capacitor
C5
±5%
C7
±5%
C9
±10%
±10%
±10%
±5%
C10
C11
C12
C14
IFA feedback capacitor
1 nF
IFA feedback capacitor
1.5 pF
1 nF
DEMOD phase-shift capacitor
demodulator output low-pass capacitor,
this value for 0.5 to 2 kHz
±5%
C15
0805
1 nF
demodulator output low-pass capacitor
this value for 0.5 to 2 kHz
±5%
C16
C17
C18
CP
R1
0603
0805
0805
0805
0805
0603
0805
0603
0805
0805
0805
0603
0603
0603
1.5 nF
10 nF
33 nF
10 pF
RSSI output low-pass capacitor
integrator capacitor
±10%
±10%
±10%
±5%
±5%
±5%
±10%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
integrator capacitor, this value for 0.5 to 2 kHz
ceramic resonator loading capacitor
loop filter resistor
10 kΩ
330 Ω
100 kΩ
680 kΩ
680 kΩ
470 Ω
470 Ω
22 nH
22 nH
10 nH
R2
optional CERFIL output matching resistor
varactor diode biasing resistor
integrator resistor
R3
R4
R5
integrator resistor
RL1
RL2
L1
MIX1 bias resistor
MIX1 bias resistor
SAW filter matching inductor from Würth-Elektronik
(WE-KI series), or equivalent part
L2
L3
LNA output tank inductor from Würth-Elektronik (WE-KI series),
or equivalent part
VD
SOD-323
BB535
varactor diode from Infineon
XTAL
SMD
6x3.5
26.80000 MHz
@ RF = 868.3 MHz
fundamental-mode crystal from
Telcona/Horizon or equivalent par
±25ppm cal.
±30ppm temp.
SAWFIL
SMD
3x3
SAFCC868MSL0X00
(f0 =868.3 MHz)
B3dB = 2 MHz
low-loss SAW filter from Murata, or equivalent part
SMD
3.45x3.1
SFECF10M7HA00
B3dB = 180 kHz
ceramic filter from Murata, or equivalent part
CERFIL
CERDIS
SMD
4.5x2
CDSCB10M7GA135
ceramic discriminator from Murata, or equivalent part
• For component values for other frequencies, please refer to the EVB descriptions
39010 71111
Rev. 013
Page 17 of 22
Data Sheet
June/07
MELEXIS [ Melexis Microelectronic Systems ]
