TH71111 Datasheet, PDF (18/22 Pages) Melexis Microelectronic Systems – 868/915MHz FSK/FM/ASK Receiver

4.4 ASK Reception
4.4.1 ASK Application Circuit
TH71111
868/915MHz
FSK/FM/ASK Receiver
RSSI
C16 C17
ASK output
R4
VCC
XTAL
25 VEE
C1
26 RO
16
OUT_IFA 15
VCC
27 VCC
ENRX
R1
28 ENRX
C3 _{29 LF}
30 VEE
TH71111
VCC 14
FBC2 13
FBC1 12
IN_IFA 11
31 IN_LNA
VEE 10
C5
L2
32 VCC
VCC
OUT_MIX2 9
123 456 78
64
C7
1 3 ^SAWFIL
VCC
C11
C9
R2 ^C10
CERFIL
L1
C4
50
RF input
L3
CB*
VCC
* each Vcc pin with blocking cap of 330pF
* one global Vcc blocking cap of 33nF
Fig. 5: Test circuit for ASK reception
39010 71111
Rev. 013
Page 18 of 22
Data Sheet
June/07