SGS Thomson Microelectronics TDA7212 Datasheet

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

SUPPLY VOLTAGE
XTAL
OSCILLATOR
IF OUTPUT

7212-01.EPS

PIN CONNECTIONS

DIP8

(Plastic Package)

ORDER CODE : TDA7212

.

RF PREAMPLIFIER

.

BALANCED MIXER

.

XTAL CONTROLLED OSCILLATOR (funda­mental 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 pur­pose XTAL controlled FM front-end up to 140MHz.

2

3

468

REF

1

5

7

XTAL

+V

S

OUT

L

R=300Ω

+V

S

RF IN

7212-02.EPS

BLOCKDIAGRAM

This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

1/4

ABSOLUTEMAXIMUM RATINGS

Symbol Parameter Value Unit

V

S

Supply Voltage 7 V

P

tot

Total Power Dissipation at T

amb

<70oC400mW

T

oper

Operating Temperature -20 , +85

o

C

T

stg,Tj

Storage and Junction Temperature -40, +150

o

C

7212-01.TBL

THERMALDATA

Symbol Parameter Value Unit

R

th (j-a)

Junction-ambient Thermal Resistance Max. 200

o

C/W

7212-02.TBL

ELECTRICAL CHARACTERISTICS

(VS=3V,T

amb

=25oC 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, RIN=75Ω,R

OUT

= 300Ω 40 dB

V

off

Local Oscillator Stop Voltage 1.2 V

7212-03.TBL

TYPICAL DC VOLTAGES (Refer to the Test Circuit)

Pins12345678

(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

23

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

23

FM2

TDA7212

22nF

18pF 39pF

22nF

1

2

3 47pF

38.3

MHz

22nF

15kΩ

SFE

10.7

300Ω

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 ob­tained: better selectivity, improved intermodulation performance, better matching with the following block that are IC’s designed for double
conversion radio receivers.

FRONT-ENDCORDLESS APPLICATION

TDA7212

3/4

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibil­ity 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. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Micro­electronics.S pecifications mentioned in this publication aresubjectto changewithout notice.This publicationsupersedesand
replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical com­ponents in life support devices or systems without express written approval of SGS-THOMSON Microelectronics.

 1992 SGS-THOMSON Microelectronics - A ll Rights Reserved

SGS-THOMSON Microelectronics GROUP OF COMPANIES

Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco

The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - United Kingdom - U.S.A.

ORDER CODE :

8

14

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 0.00 8 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