TH7111
868/915MHz
FSK/FM/ASK Receiver
FSK test circuit component list to Fig. 2
Part
Size
Value / Type
Tolerance
Description
C1
C3
0805
0805
0603
0603
0603
0603
0603
0603
0805
0603
0603
0603
0603
0805
0805
15 pF
1 nF
±10%
±10%
±5%
crystal series capacitor
loop filter capacitor
C4
4.7 pF
2.7 pF
NIP
capacitor to match to SAW filter input
capacitor to match to SAW filter output
LNA output tank capacitor
MIX1 input matching capacitor
MIX1 blocking capacitor
C5
±5%
C6
±5%
C7
1.2 pF
330 pF
22 pF
±5%
C8
±10%
±5%
C9
IF1 tank capacitor
C10
C11
C12
C13
C14
CP
C15
33 nF
±10%
±10%
±10%
±5%
IFA feedback capacitor
1 nF
IFA feedback capacitor
1 nF
IFA feedback capacitor
1.5 pF
680 pF
10 – 12 pF
10 – 47 pF
DEMOD phase-shift capacitor
DEMOD coupling capacitor
CERRES parallel capacitor
±10%
±5%
±5%
demodulator output low-pass capacitor, depending on
data rate
C16
0805
10 – 47 pF
±5%
demodulator output low-pass capacitor, depending on
data rate
C17
R1
0603
0805
0603
0603
0603
0805
0805
330 pF
10 kΩ
±10%
±10%
±5%
±5%
±5%
±5%
±5%
RSSI output low-pass capacitor
loop filter resistor
L1
12 nH
inductor to match SAW filter
inductor to match SAW filter
LNA output tank inductor
IF1 tank inductor
L2
12 nH
L3
6.8 nH
100 nH
100 nH
L4
L5
IF1 tank inductor
XTAL
HC49-
SMD
25.22353 MHz
±25ppm calibra-
fundamental-mode crystal, Cload = 10 pF to 15pF,
C0, max = 7 pF, Rm, max = 50 Ω
tion
@ RF = 868.3 MHz
±30ppm temp.
SAWFIL
CERFIL
QCC8C
B3570
low-loss SAW filter from EPCOS
ceramic filter from Murata
B
3dB = 1.7 MHz
TBD
@ RF = 868.3 MHz
SFE10.7MFP
leaded
type
@ BIF2 = 40 kHz
SFECV10.7MJS-A
@ BIF2 = 150 kHz
SMD type
±40 kHz
CERRES SMD type CDACV10.7MG18-A
ceramic demodulator tank from Murata
NIP – not in place, may be used optionally
TH7111 Data Sheet
3901007111
Page 12 of 20
Nov. 2001
Rev. 005
ETC [ ETC ]
