EVB71102
315/433MHz Receiver
Evaluation Board Description
2.2.2
Part
Board Component Values for ASK
Value
Value
Size
Tolerance
Description
@ 315 MHz
@ 433.92 MHz
crystal series capacitor
C1
C3
0805
0603
0603
0603
0603
0603
0603
0603
27 pF
1 nF
27 pF
1 nF
±5%
±10%
±5%
loop filter capacitor
LNA output tank capacitor
MIX1 input matching capacitor
IF1 tank capacitor
C6
6.8 pF
2.7 pF
27 pF
33 nF
1 nF
4.7 pF
2.2 pF
27 pF
33 nF
1 nF
C7
±5%
C8
±5%
IFA feedback capacitor
IFA feedback capacitor
IFA feedback capacitor
C9
±10%
±10%
±10%
C10
C11
1 nF
1 nF
RSSI output low-pass capacitor,
C16
C17
0805
0805
1.5 nF
10 nF
1.5 nF
10 nF
this value for data rates < 10 kbps NRZ,
for higher data rates decrease the value
±10%
±10%
data slicer capacitor,
this value for data rates > 0.8 kbps NRZ,
for lower data rates increase the value
CB1 to CB5
CB7 to CB8
de-coupling capacitor
0603
0805
0603
330 pF
33 nF
330 pF
33 nF
±10%
±10%
±5%
de-coupling capacitor
CB6
optional capacitor,
to couple external RO signal
C_RO
330 pF
330 pF
loop filter resistor
R1
R2
R4
L1
0805
0603
0805
0603
10 kΩ
330 Ω
330 kΩ
0 Ω
10 kΩ
330 Ω
330 kΩ
68 nH
±5%
±5%
±5%
±5%
optional CERFIL output matching resistor
data slicer resistor
SAW filter matching inductor
from Würth-Elektronik (WE-KI series),
or equivalent part
L2
L3
0603
0603
33 nH
82 nH
15 nH
±5%
±5%
LNA output tank inductor from Würth-Elek-
tronik (WE-KI series), or equivalent part
22 nH
IF1 tank inductor from Würth-Elektronik
(WE-KI series), or equivalent part
L4
L5
0603
0603
100 nH
100 nH
100 nH
100 nH
±5%
±5%
fundamental-mode crystal from
Telcona/Horizon (HEX22 series)
or equivalent part
SMD
6x3.5
23.26429 MHz @
RF = 315 MHz
23.51222 MHz @
RF = 433.92 MHz
±25ppm cal.
±30ppm temp.
XTAL
fundamental-mode crystal, Cload = 10 pF
to 15pF, C0, max = 7 pF, R1, max = 50 Ωl
HC49
SMD
SAFCC433MBL0X00
(f0 = 433.92 MHz)
low-loss SAW filters from Murata
or equivalent part
B
3dB = 840 kHz
SMD
3x3
SAWFIL
CERFIL
SAFDC315MSM0T00
(f0 = 315.00 MHz)
B3dB = 5MHz
SMD
3.45x3.1
ceramic filter from Murata,
or equivalent part
SFECF10M7HA00
B3dB = 180 kHz
39012 71102 01
Rev. 011
Page 10 of 14
EVB Description
June/07
MELEXIS [ Melexis Microelectronic Systems ]
