TH7121
300 to 930MHz
FSK/FM/ASK Transceiver
3901007121
Page 21 of 28
Data Sheet
Rev. 001
Jan. 2002
PR
EL
IM
INA
RY
FSK test circuit component list to Fig. 4 and Fig. 5
Part
Size
Value
@ 868.3 MHz
Tolerance
Description
C0
0805
8.2 pF
±5%
VCO tank capacitor
C1
0603
NIP
±5%
LNA output tank capacitor
C2
0603
1 pF
±5%
MIX input matching capacitor
C3
0805
10 nF
±10%
data slicer capacitor
C4
0805
100 pF
±10%
demodulator output low-pass capacitor,
depending on data rate
C5
0805
330 pF
±10%
RSSI output low pass capacitor
CB0
0805
100 nF
±10%
blocking capacitor
CB1 to CB4
0805
0603
330 pF
±10%
blocking capacitor
CB5
0603
330 pF
±10%
blocking capacitor
CB6
0603
10 nF
±10%
blocking capacitor
CB7
0603
330 pF
±10%
blocking capacitor
CF1
0805
2.2 nF
±5%
loop filter capacitor
CF2
0805
100 pF
±5%
loop filter capacitor
CX1
0805
15 pF
±5%
RO capacitor
CX2
0805
33 pF
±5%
RO capacitor for FSK (
∆f = ±20 kHz)
CP0
0805
10 - 12 pF
±5%
CERRES parallel capacitor
CRX0
0603
100 pF
±5%
RX coupling capacitor
CTX0
0603
10 pF
±5%
TX coupling capacitor
RB
0805
10
Ω±10%
blocking resistor for VCC
RP
0805
3.9 K
Ω±5%
CERFIL parallel resistor
RF
0805
82 k
Ω
±5%
loop filter resistor
RF1
0805
9.1 k
Ω
±5%
loop filter resistor
RPS
0805
NIP
±5%
power-select resistor, only required
at fixed-frequency operation
L0
0805
2.2 nH
±5%
VCO tank inductor
L1
0603
10 nH
±5%
LNA output tank inductor
LTX0
0805
2.2 nH // 2.7 pF
±5%
TX impedance matching inductor
VD1
SOD-323
BBY-03W
varactor diode from Infineon
XTAL
HC49-SMD
7.1505 MHz
±30ppm calibr.
±30ppm temp.
fundamental-mode crystal, Cload = 10 pF to 15pF,
C0, max = 7 pF, Rm, max = 70
Ω
CERFIL
Leaded
type
SFE10.7MFP @
BIF2 = 40 kHz
TBD
ceramic filter from Murata
SMD
type
SFECV10.7MJS-A
@ BIF2 = 150 kHz
±40 kHz
ceramic filter from Murata
CERRES
SMD type
CDACV10.7MG18-A
ceramic demodulator tank from Murata
Notes:
•
NIP – not in place, may be used optionally
•
Antenna matching network according to Evaluation Board Description EVB7120
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