TDA7212
LOW VOLTAGE FM XTAL CONTROLLED FRONT-END
August 1992
ADVANCE DATA
1
2
3
4
8
7
6
5
RF INPUT
SUPPLY VOLTAGE
RF TUNING
GND
SUP PLY VOLTAGE
XTAL
OSC ILLATOR
IF OUTPUT
7 212-01.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 TDA7212 is a monolithic integrated circuit in a
8 pin minidip package designed for general pur-
pose XTAL controlled FM front-end up to 140MHz.
2
3
4
6
8
REF
1
5
7
XTAL
+V
S
OUT
L
R = 300
+V
S
RF IN
7 212-02.EPS
BLOCK DIAGRAM
This is advance info rmation on a new product now in development or undergoing evaluation. Details are subject to change without notice.
1/4
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Supply Voltage
7
V
P
tot
Total Power Dissipation a t T
amb
< 70
o
C
400
mW
T
oper
Operating Tem pera ture
-20 , +85
o
C
T
stg
, T
j
Storage and Junction Temperature
-40, +150
o
C
7212-01.TBL
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th (j-a)
Junction-am bient Thermal Resistance
Max.
200
o
C/ W
7212-02.TBL
ELECTRICAL CHARACTERISTICS
(V
S
= 3V, T
amb
= 25
o
C unless otherwise specified - Refer to the Test Circuit)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
S
Supply Voltage
3
6
V
I
S
Supply Current
3
mA
V
OSC
Local Oscillator Voltage (Pin 6)
200
mV
RMS
G
Voltage Gain
f = 49MHz, R
IN
= 75
, R
OUT
= 300
40
dB
V
off
Local Oscillator Stop Vo ltage
1.2
V
7212-03.TBL
TYPICAL DC VOLTAGES
(Refer to the Test Circuit)
Pins
1
2
3
4
5
6
7
8
(V)
2.3
3
3
0
3
2.1
2.9
3
7212-04.TBL
4
8
1
5
7
+V
S
6
C7
39pF
L3
C3
22nF
L2
C6
15pF
C2 22nF
2
3
XTAL
39.16
MHz
C4 47pF
C1
2.2nF
IN
49.86kHz
C5
22nF
FM2
OUT
10.7MHz
TDA7212
L2 = L3 = TOKO E521LN 110033
7212-03.EPS
TEST CIRCUIT
TDA7212
2/4
4
8
1
5
7
+V
S
6
L3
L2
2
3
FM2
TDA7212
22nF
18pF
39pF
22nF
1
2
3
47pF
38.3
MHz
22nF
15k
SFE
10.7
300
OUT
15pF
390pF
L1
49MHz
IN
3.3pF
L1 = L3 = TOKO E521LN 110033
7212-04
NB . : In this application it is advisable to decrease the gain of the front-end through a tapping on the L2 coil (3 turns of 12). So it can be ob-
tained: better selectivity, improve d intermodulation performance, better match ing with the following block that are IC's design ed for double
conversion radio receivers.
FRONT-END CORDLESS APPLICATION
TDA7212
3/4
Information furnished is believed to be accurate and reliable. However, S GS-THOMSON Microelectronics assumes no responsibil-
ity for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may
result from its use. N o licence is granted by implication or otherwise under any pate nt or patent rights of SGS-THOMSON Micro-
electronic s. S pecifica tions mentioned in this publication are subject to change without notice. This publication supe rsedes and
replaces all inform ation previously supplied. SGS-TH OMSON Microelectronics products are not authorized for use as critical com-
ponents in life s upport devices or systems without express written approval of S GS-THOMSON Microelectronics.
1992 SGS-THOMSON Microelectronics - A ll Rights R eserved
SGS-THOM SON Microelectronics GROUP OF C OMPANIES
Australia - Brazil - China - France - Germa ny - Hong Kong - Italy - Japan - K orea - M alaysia - M alta - Morocco
The Netherlands - Singapore - Spain - Sw eden - Switzerland - Taiwan - U nited Kingdo m - U .S.A.
ORDER
CODE
:
8
1
4
I
a1
L
B
e
D
b
Z
e3
F
B1
E
5
Z
A
e4
b1
PM-DIP8.EPS
PACKAGE MECHANICAL DATA
8 PINS - PLASTIC DIP
Dimensions
Millimeters
Inches
Min.
Typ.
Max.
Min.
Typ.
Max.
A
3.32
0.131
a1
0.51
0.020
B
1.15
1.65
0.045
0.065
b
0.356
0.55
0.014
0.022
b1
0.204
0.304
0.008
0.012
D
10.92
0.430
E
7.95
9.75
0.313
0.384
e
2.54
0.100
e3
7.62
0.300
e4
7.62
0.300
F
6.6
0260
i
5.08
0.200
L
3.18
3.81
0.125
0.150
Z
1.52
0.060
DIP8.TBL
TDA7212
4/4
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