TH7111
868/915MHz
FSK/FM/ASK Receiver
FM test circuit component list to Fig. 4
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
33 nF
1 nF
±5%
C8
±10%
±5%
C9
IF1 tank capacitor
C10
C11
C12
C13
C14
CP
C15
±10%
±10%
±10%
±5%
IFA feedback capacitor
IFA feedback capacitor
1 nF
IFA feedback capacitor
1.5pF
680 pF
10 –12 pF
100 pF
DEMOD phase-shift capacitor
DEMOD coupling capacitor
CERRES parallel capacitor
±10%
±5%
±5%
sallen-key low-pass filter capacitor, to set cut-off fre-
quency
C16
0805
100 pF
±5%
sallen-key low-pass filter capacitor, to set cut-off fre-
quency
C17
R1
R3
R4
R5
R6
L1
0603
0805
0805
0805
0805
0805
0603
0603
0603
0603
0603
330 pF
10 kΩ
12 kΩ
6.8 kΩ
33 kΩ
33 kΩ
12 nH
12 nH
6.8 nH
100 nH
100 nH
±10%
±10%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
RSSI output low-pass capacitor
loop filter resistor
sallen-key filter resistor, to set desired filter characteristic
sallen-key filter resistor, to set desired filter characteristic
sallen-key filter resistor, to set cut-off frequency
sallen-key filter resistor, to set cut-off frequency
inductor to match SAW filter
L2
inductor to match SAW filter
L3
LNA output tank inductor
L4
IF1 tank inductor
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 16 of 20
Nov. 2001
Rev. 005
ETC [ ETC ]
