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TH7121
300 to 930MHz
FSK/FM/ASK Transceiver
3901007121
Page 19 of 28
Data Sheet
Rev. 001
Jan. 2002
PR
EL
IM
INA
RY
Application Circuit Examples
Programmable Channel FSK Application Circuit
Figure 4:
Test circuit for programmable channel FSK operation
FSK
output
FSK
input
CX1
CX2
CERFIL
XTAL
RF1
RPS
CTX0
C1
C2
L1
LTX0
CRX0
L0
RSSI
OUT_MIX
VEE
C3
CB5
C5
C4
C0
CB0
CB1
CB2
CB3
CB6
RE/SCLK
IN_DTA
ASK/FSK
FSK_SW
RO
VCC
OUT_PA
IN_LNA
OUT_LNA
VEE
GAIN_LNA
IN_MIX
VEE
VD1
RB
VCC
VCC
VCC
SCLK
SDTA
SDEN
Lock
detect
CB4
RF input
RF output
Antenna
matching
network
CB7
VCC
CP0
RP
CF1
CF2
RF