EVB71101
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
C1
C3
0805
0603
0603
0603
0603
0603
0603
27 pF
1 nF
27 pF
1 nF
crystal series capacitor
±5%
±10%
±5%
loop filter capacitor
C6
6.8 pF
2.7 pF
33 nF
1 nF
4.7 pF
2.2 pF
33 nF
1 nF
LNA output tank capacitor
MIX1 input matching capacitor
IFA feedback capacitor
IFA feedback capacitor
IFA feedback capacitor
C7
±5%
C9
±10%
±10%
±10%
C10
C11
1 nF
1 nF
RSSI output low-pass capacitor,
C16
C17
0805
1.5 nF
1.5 nF
this value for data rates < 10 kbps NRZ,
for higher data rates decrease the value
±10%
data slicer capacitor,
this value for data rates > 0.8 kbps NRZ,
for lower data rates increase the value
0805
0603
10 nF
10 nF
±10%
±10%
CB1 to CB5
CB7 to CB8
de-coupling capacitor
330 pF
330 pF
CB6
0805
0603
33 nF
33 nF
de-coupling capacitor
±10%
±5%
C_RO
330 pF
330 pF
optional capacitor,
to couple external RO signal
R1
R2
0805
0603
0805
0805
0805
0603
loop filter resistor
10 kΩ
330 Ω
330 kΩ
470 Ω
470 Ω
0 Ω
10 kΩ
330 Ω
330 kΩ
470 Ω
470 Ω
68 nH
±5%
±5%
±5%
±5%
±5%
±5%
optional CERFIL output matching resistor
data slicer resistor
R4
RL1
RL2
L1
MIX1 bias resistor
MIX1 bias 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
SMD
6x3.5
fundamental-mode crystal from
Telcona/Horizon (HEX22 series)
or equivalent part
20.35625 MHz
@ RF = 315 MHz
26.45125 MHz
@ RF = 433.92 MHz
±25ppm cal.
±30ppm temp.
XTAL
HC49
SMD
fundamental-mode crystal, Cload = 10 pF
to 15 pF, C0, max = 7 pF, R1, max = 50 Ωl
SAFCC433MBL0X00 B3dB = 840 kHz low-loss SAW filters from Murata
(f0 = 433.92 MHz)
or equivalent part
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 71101 01
Rev. 011
Page 10 of 14
EVB Description
June/07