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Partno	Mfg	Dc	Qty	Available	Descript
TDA7212	ST	N/a	50	avai	Low voltage FM xtal controlled front-end

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TDA7212
Low voltage FM xtal controlled front-end
TDA7212
LOW VOLTAGE FM XT AL CONTROLLED FRONT-END
ADVANCE DATA INPUT
SUPPLY VOLTAGE TUNING
GND
SUPPLY VOLTAGE
XTAL
OSCILLATOR OUTPUT
7212-01.EPS
PIN CONNECTIONS
DIP8
(Plastic Package)
ORDER CODE: TDA7212 RF PREAMPLIFIER. BALANCED MIXER. XTAL CONTROLLED OSCILLATOR (funda-
mental and overtone). LOW OSCILLATOR RADIATION. HIGH SIGNAL HANDLING
DESCRIPTION
The TDA7212isa monolithic integrated circuitina pin minidip package designed for general pur-
pose XTAL controlled FM front-endupto 140MHz.8
REF
XTALS
OUTR= 300ΩIN
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit Supply Voltage 7 V
Ptot Total Power Dissipationat Tamb <70o C400 mW
Toper Operating Temperature -20, +85 oC
Tstg,Tj Storage and Junction Temperature -40, +150 oC
7212-01.TBL
THERMAL DATA
Symbol Parameter Value Unit
Rth(j-a) Junction-ambient Thermal Resistance Max. 200 o C/W
7212-02.TBL
ELECTRICAL CHARACTERISTICS
(VS =3V, Tamb =25oC unless otherwise specified- Referto the Test Circuit)
Symbol Parameter TestConditions Min. Typ. Max. Unit Supply Voltage 3 6 V Supply Current 3 mA
VOSC Local Oscillator Voltage (Pin6) 200 mVRMS Voltage Gain f= 49MHz,RIN =75Ω,ROUT= 300Ω 40 dB
Voff Local Oscillator Stop Voltage 1.2 V
7212-03.TBL
TYPICAL DC VOLTAGES (Referto theTest Circuit)
Pins 1 234 56 78
(V) 2.3 3 3 0 3 2.1 2.9 3
7212-04.TBLS
39pF L3
22nFC6
15pF 22nF
XTAL
MHz 47pF
2.2nFIN
49.86kHz
22nF
FM2
OUT
10.7MHz
TDA7212=L3= TOKO E521LN110033
7212-03.EPS
TEST CIRCUIT
TDA7212
+VSL2
FM2
TDA7212
22nF
18pF 39pF
22nF 47pF
MHz
22nF
15kΩ
SFE
300Ω
OUT
15pF
390pF
49MHz
3.3pF =L3= TOKO E521LN 110033
NB.:Inthis applicationitis advisableto decreasethe gainof thefront-end througha tappingontheL2coil(3 turnsof12).Soitcanbeob-
tained: better selectivity, improved intermodulation performance, better matching withthe following block thatare IC’s designed fordouble
conversion radio receivers.
FRONT-ENDCORDLESS APPLICATION
TDA7212
Information furnishedis believedtobe accurate and reliable. However, SGS-THOMSON Microelectronics assumesno responsibil-
ityforthe consequencesofuseof such information norforany infringementof patentsor other rightsof third parties which may
result fromits use.No licenceis grantedby implicationor otherwise underany patentor patent rightsof SGS-THOMSON Micro-
electronics.Specifications mentionedin this publicationare subjectto change without notice. This publication supersedesand
replacesall information previously supplied. SGS-THOMSON Microelectronics productsarenot authorizedforuseas critical com-
ponentsinlife supportdevicesor systems without express written approvalof SGS-THOMSON Microelectronics. 1992 SGS-THOMSON Microelectronics-All Rights Reserved
SGS-THOMSON Microelectronics GROUPOF COMPANIES
CODE L e3
PM-DIP8.EPS
PACKAGE MECHANICAL DATA PINS- PLASTIC DIP
Dimensions Millimeters Inches
Min. Typ. Max. Min. Typ. Max. 3.32 0.131 0.51 0.020 1.15 1.65 0.045 0.065 0.356 0.55 0.014 0.022 0.204 0.304 0.008 0.012 10.92 0.430 7.95 9.75 0.313 0.384 2.54 0.100 7.62 0.300 7.62 0.300 6.6 0260 5.08 0.200 3.18 3.81 0.125 0.150 1.52 0.060
DIP8.TBL
TDA7212
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