EVB71112 Datasheet, PDF (7/14 Pages) Melexis Microelectronic Systems – 868/915MHz Receiver Evaluation Board Description

EVB71112
868/915MHz Receiver
Evaluation Board Description
2.1.2 Board Component Values for FSK
Part
C1
C3
C4
C5
C7
C8
C9
C10
C11
C12
C15
C16
C17
CB1 to CB5
CB7 to CB8
CB6
C_RO
R1
R2
R4
R5
L1
L2
L3
L4
L5
XTAL
SAWFIL
CERFIL
CERDIS
Size
0805
0603
0603
0603
0603
0603
0603
0603
0603
0805
0805
0805
0805
0603
0805
0603
0805
0603
0805
0805
0603
0603
0603
0603
0603
SMD
6x3.5
HC49
SMD
SMD
3x3
SMD
3.8x3.8
SMD
3.45x3.1
SMD
4.5x2
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
1.5 nF
10 nF
330 pF
33 nF
330 pF
10 kΩ
330 Ω
330 kΩ
220 kΩ
22 nH
22 nH
10 nH
100 nH
100 nH
Value
@ 915 MHz
22 pF
1 nF
NIP
NIP
0.68 pF
22 pF
33 nF
1 nF
1 nF
10 pF
100 pF
1.5 nF
10 nF
330 pF
33 nF
330 pF
10 kΩ
330 Ω
330 kΩ
220 kΩ
0Ω
0Ω
10 nH
100 nH
100 nH
25.22353 MHz
26.59706 MHz
@ RF = 868.3 MHz @ RF = 915 MHz
SAFCC868MSL0X00
(f₀ =868.3 MHz)
SAFCH915MAL0N00
(f₀ = 915 MHz)
SFECF10M7HA00
CDSCB10M7GA135
Tolerance
±5%
±10%
±5%
±5%
±5%
±5%
±10%
±10%
±10%
±5%
±5%
±10%
±10%
±10%
±10%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
±25ppm cal.
±30ppm temp.
B_3dB = 2 MHz
B_3dB = 40 MHz
B_3dB = 180 kHz
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,
for higher data rates decrease the value
RSSI output low-pass capacitor
data slicer capacitor,
this value for data rates > 0.8 kbps NRZ,
for lower data rates increase the value
de-coupling capacitor
de-coupling capacitor
optional capacitor,
to couple external RO signal
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-Elek-
tronik (WE-KI series), or equivalent part
IF1 tank inductor from Würth-Elektronik
(WE-KI series), or equivalent part
fundamental-mode crystal from
Telcona/Horizon (HEX22 series)
or equivalent part
fundamental-mode crystal, C_load = 10 pF
to 15 pF, C_{0, max} = 7 pF, R_{1, max} = 50 Ωl
low-loss SAW filter from Murata
or equivalent part
ceramic filter from Murata,
or equivalent part
ceramic discriminator from Murata,
or equivalent part
39012 71112 01
Rev. 011
Page 7 of 14
EVB Description
June/07