TH7111
868/915MHz
FSK/FM/ASK Receiver
ASK test circuit component list to Fig. 5
Part
Size
Value / Type
Tolerance
Description
C1
C3
0805
0805
0603
0603
0603
0603
0603
0805
0805
0603
0603
0805
0603
0805
0603
0603
0603
0603
0603
0603
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
C5
±5%
C6
±5%
C7
1.2 pF
330 pF
22 pF
±5%
MIX1 input matching capacitor
MIX1 blocking capacitor
C8
±10%
±5%
C9
IF1 tank capacitor
C10
C11
C12
C13
C14
R1
33 nF
±10%
±10%
±10%
±10%
±10%
±10%
±5%
IFA feedback capacitor
1 nF
IFA feedback capacitor
1 nF
IFA feedback capacitor
1 nF to 10 nF
330 pF
10 kΩ
100 kΩ
12 nH
12 nH
6.8 nH
100 nH
100 nH
ASK data slicer capacitor, depending on data rate
RSSI output low-pass capacitor
loop filter resistor
R3
ASK data slicer resistor, depending on data rate
inductor to match SAW filter
inductor to match SAW filter
LNA output tank inductor
L1
±5%
L2
±5%
L3
±5%
L4
±5%
IF1 tank inductor
L5
±5%
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
NIP – not in place, may be used optionally
TH7111 Data Sheet
3901007111
Page 18 of 20
Nov. 2001
Rev. 005
ETC [ ETC ]
