TH7111 Datasheet, PDF (13/20 Pages) List of Unclassifed Manufacturers – FSK /FM/ASK Receiver

TH7111
868/915MHz
FSK/FM/ASK Receiver
FSK Circuit with AFC and Ceramic Resonator Tolerance Compensation
C15 C16
C17 C18
R4
C19
R3
VCC
R5
XTAL _C1
VCC
R1 C3
C5
VCC
L2
VEE
RO
VCC
ENRX
LF1
LF2
VEE
VEE
IN_LNA
VCC
ENRO
LQFP44
IN_MIX2
SW_MIX2
IN_DEM
OUT_IFA
VCC ^{CP VD}
C14
C13 _CERRES
VCC
FBC2
FBC1
IN_IFA
VCC
C12
C10
C11
VEE
OUT_MIX2
CERFIL
VCC
VCC
L1
C4
C8
C7
L3
C6
C9
L4
L5
CB*
VCC
Fig. 3: Test circuit for FSK with AFC and resonator compensation
Circuit Feature
! Improves input frequency acceptance range up to RF_nom ±50 kHz
! Eliminates calibration tolerances of ceramic resonator
! Eliminates temperature tolerances of ceramic resonator
! Non-inverted and inverted CMOS-compatible outputs
TH7111 Data Sheet
3901007111
Page 13 of 20
Nov. 2001
Rev. 005