th7121 ETC-unknow, th7121 Datasheet - Page 26
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th7121
Manufacturer Part Number
th7121
Description
300 To 930mhz Fsk/fm/ask Transceiver
Manufacturer
ETC-unknow
Datasheet
1.TH7121.pdf
(28 pages)
- Current page: 26 of 28
- Download datasheet (710Kb)
Fixed-Frequency FSK Application Circuit with AFC
3901007121
Rev. 001
Circuit Features
!
!
!
!
Automatic Frequency Control (AFC)
Increases input frequency acceptance range up to RF
Compensation of calibration tolerances of ceramic resonator
Compensation of temperature tolerances of ceramic resonator
Figure 9: Test circuit for fixed-frequency FSK operation at 868 MHz with AFC
RF output
RF input
matching
Antenna
network
CB1
CERFIL
CTX0
CRX0
C1
L1
C2
OUT_MIX
LTX0
CB4
CB2
RPS
VEE
OUT_LNA
GAIN_LNA
IN_MIX
VEE
OUT_PA
IN_LNA
CB3
L0
C0
CB5
VD1
Page 26 of 28
RB
RF1
CF1
RF
CP1
VD
CB6
C3
R2
CF2
C4
nom
FSK/FM/ASK Transceiver
50 kHz
RE/SCLK
ASK/FSK
C5
FSK_SW
IN_DTA
VCC
RO
CB0
VEE
RSSI
300 to 930MHz
CB7
CX2
XTAL
TH7121
VCC
VCC
VCC
CX1
enable
enable
output
VCC
input
FSK
FSK
RX
TX
Data Sheet
Jan. 2002
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