TH7120 Datasheet, PDF (26/28 Pages) List of Unclassifed Manufacturers – 300 to 930MHz FSK/FM/ASK Transceiver

TH7120
300 to 930MHz
FSK/FM/ASK Transceiver
Fixed-Frequency FSK Application Circuit with AFC
VCC
CB3
RB
CF1
RF input
RF output
CB2
CF2
RF
L0
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
RE/SCLK
VCC
ASK/FSK
TX
enable
RX
CB7 ^enable
VCC
IN_DTA
FSK_SW
RO
FSK
CX2 input
CX1
XTAL
VEE
CERFIL
CB4
CB5
C3
R2 ^C4
CP1
VD
RSSI
C5
CB0
FSK
output
VCC
VCC
Figure 9: Test circuit for fixed-frequency FSK operation at 433 MHz with AFC
Circuit Features
! Automatic Frequency Control (AFC)
! Increases input frequency acceptance range up to RF_nom ±50 kHz
! Compensation of calibration tolerances of ceramic resonator
! Compensation of temperature tolerances of ceramic resonator
3901007120
Rev. 005
Page 26 of 28
Data Sheet
Jan. 2002