TH71111
868/915MHz
FSK/FM/ASK Receiver
4.2.2
Part
Narrow Band FSK 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
C15
IFA feedback capacitor
1 nF
IFA feedback capacitor
1.5 pF
220 pF
DEMOD phase-shift capacitor
demodulator output low-pass capacitor,
this value for data rates < 10 kbps NRZ
±5%
C16
C17
CP
R1
0603
0805
0603
0805
0603
0603
0805
0805
0603
0603
0603
1.5 nF
10 nF
RSSI output low-pass capacitor
±10%
±10%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
data slicer capacitor, this value for data rates > 0.8 kbps NRZ
6.8 - 8.2 pF
ceramic resonator loading capacitor
loop filter resistor
10 kΩ
330 Ω
330 kΩ
470 Ω
470 Ω
22 nH
22 nH
10 nH
R2
optional CERFIL output matching resistor
data slicer resistor, this value for 0.4 to 10 kbps NRZ
MIX1 bias resistor
R4
RL1
RL2
L1
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
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
Leaded
type
SFKLA10M7NL00
SFVLA10M7LF00
CDSCB10M7GA135
B3dB = 30 kHz
B3dB = 80 kHz
ceramic filter from Murata, or equivalent part
CERFIL
CERDIS
optional, ceramic filter from Murata, or equivalent part
ceramic discriminator from Murata, or equivalent part
SMD
4.5x2
• For component values for other frequencies, please refer to the EVB descriptions
39010 71111
Rev. 013
Page 15 of 22
Data Sheet
June/07
MELEXIS [ Melexis Microelectronic Systems ]
