th7121 ETC-unknow, th7121 Datasheet - Page 25

• Manufacturer Part Number: th7121
• Description: 300 To 930mhz Fsk/fm/ask Transceiver
• Manufacturer: ETC-unknow

Programmable Channel FSK Application Circuit with AFC
3901007121
Rev. 001
Circuit Features
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RF output
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
RF input
matching
Antenna
network
CB1
Figure 8: Test circuit for programmable channel FSK operation with AFC
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
RB
RF1
Page 25 of 28
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
detect
Lock
CB0
VEE
RSSI
CB7
SDEN
SCLK
SDTA
CX2
XTAL
300 to 930MHz
TH7121
VCC
VCC
VCC
CX1
output
VCC
input
FSK
FSK
Data Sheet
Jan. 2002