TH71111
868/915MHz
FSK/FM/ASK Receiver
4.4 ASK Reception
4.4.1
ASK Application Circuit
RSSI
ASK output
C16
C17
VCC
R4
XTAL
16
25
26
VEE
RO
C1
C3
OUT_IFA
VCC
15
14
27 VCC
VCC
VCC
C11
28 ENRX
FBC2 13
FBC1 12
ENRX
C9
R2
TH71111
LF
29
30
31
32
C10
R1
IN_IFA
11
VEE
IN_LNA
VCC
VEE 10
OUT_MIX2
9
C5
VCC
CERFIL
L2
3
5
6
8
1
2
4
7
C7
6
4
3
SAWFIL
1
L1
L3
C4
CB*
VCC
50
* each Vcc pin with blocking cap of 330pF
* one global Vcc blocking cap of 33nF
RF input
Fig. 5: Test circuit for ASK reception
39010 71111
Rev. 013
Page 18 of 22
Data Sheet
June/07