TH7121 Datasheet, PDF (19/28 Pages) List of Unclassifed Manufacturers – 300 to 930MHz FSK/FM/ASK Transceiver

Application Circuit Examples
Programmable Channel FSK Application Circuit
TH7121
300 to 930MHz
FSK/FM/ASK Transceiver
VCC
RF input
RF output
CB3
CB2 _L0
RB
CF1
CF2
VD1 _RF
RF1
Lock
detect
PRELIMINARY RPS
C0
LTX0
Antenna
matching
network
CB1
CTX0
CRX0
L1
C1
C2
OUT_PA
IN_LNA
VEE
OUT_LNA
GAIN_LNA
IN_MIX
VEE
OUT_MIX
CB6
SDEN
SDTA
RE/SCLK
VCC
ASK/FSK
SCLK
CB7
VCC
IN_DTA
FSK_SW
RO
FSK
CX2 input
CX1
XTAL
VEE
CERFIL
CB4
CB5
C3
C4
RP _CP0
RSSI
C5
CB0
FSK
output
VCC
VCC
Figure 4: Test circuit for programmable channel FSK operation
3901007121
Rev. 001
Page 19 of 28
Data Sheet
Jan. 2002