TH7121 Datasheet, PDF (25/28 Pages) List of Unclassifed Manufacturers – 300 to 930MHz FSK/FM/ASK Transceiver

TH7121
300 to 930MHz
FSK/FM/ASK Transceiver
Programmable Channel FSK Application Circuit with AFC
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
CB5
C3
RSSI
FSK
output
R2 ^C4
C5
VCC
CP1
CB4
VD
CB0
VCC
Figure 8: Test circuit for programmable channel FSK operation 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
3901007121
Rev. 001
Page 25 of 28
Data Sheet
Jan. 2002