TH71112
868/915MHz
FSK/ASK Receiver
4.3
4.3.1
ASK Reception
ASK Application Circuit
RSSI
ASK output
C16
C17
R4
VCC
XTAL
C1
25 VEE
26 RO
16
OUT_IFA 15
VCC
27 VCC
VCC 14
VCC
ENRX
R1
C3
28 ENRX
29 LF
30 VEE
TH71112
FBC2 13
FBC1 12
IN_IFA 11
C9
R2
C11
C10
31 IN_LNA
VEE 10
L2
C5
VCC
32 VCC
OUT_MIX2 9
CERFIL
1
2
3
4
5
6
7
8
6
1
4
3
SAWFIL
C7
C8
L1
C4
L3
CB*
VCC
50
RF input
* each Vcc pin with blocking cap of 330pF
* one global Vcc blocking cap of 33nF
Fig. 4: Test circuit for ASK reception
39010 71112
Rev. 016
Page 16 of 20
Data Sheet
Jun/12
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