TH71111
868/915MHz
FSK/ASK Receiver
4
4.1
4.1.1
Test Circuits
Standard FSK Reception
Standard FSK Application Circuit
OUTP
RSSI
FSK output
C15
R5
C16
R4
C17
VCC
CERDIS
XTAL
VCC
C1
25 VEE
26 RO
27 VCC
16
OUT_IFA 15
VCC 14
C12
VCC
ENRX
R1
C3
28 ENRX
29 LF
30 VEE
TH71111
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
L1
C4
L3
CB*
VCC
50
RF input
* each Vcc pin with blocking cap of 330pF
* one global Vcc blocking cap of 33nF
Fig. 2: Test circuit for FSK reception
Circuit Features
? Tolerates input frequency variations
? Well-suited for NRZ, Manchester and similar codes
39010 71111
Rev. 015
Page 12 of 20
Data Sheet
Jun/12
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