SGS Thomson Microelectronics TDA4443 Datasheet

TDA4443

MULTISTANDARDVIDEO IF AMPLIFIER

.

SWITCHING OFF THE IF AMPLIFIER WHEN
OPERATINGIN VTR MODE

.

DEMODULATION OF NEGATIVE OR POSI­TIVE IF SIGNALS. THE OUTPUT REMAINS
ON THE SAMEPOLARITYIN EVERYCASE

.

IF AGC AUTOMATICALLY ADJUSTED TO
THEACTUALSTANDARD

.

TWOAGCPOSSIBILITIESFOR B/G MODE :

1. GATEDAGC

2. UNGATED AGC ON SYNC. LEVEL AND
CONTROLLED DISCHARGE DEPENDENT
ON THE AVERAGESIGNAL LEVELFORVTR
ANDPERITV APPLICATIONS
FOR STANDARD L : FAST AGC ON PEAK
WHITEBY CONTROLLEDDISCHARGE

.

POSITIVEOR NEGATIVEGATINGPULSE

.

EXTREMELYHIGH INPUTSENSITIVITY

.

LOW DIFFERENTIALDISTORTION

.

CONSTANTINPUT IMPEDANCE

.

VERYHIGHSUPPLYVOLTAGEREJECTION

.

FEWEXTERNALCOMPONENTS

.

LOW IMPEDANCE VIDEO OUTPUT

.

SMALLTOLERANCESOF THE FIXED VIDEO
SIGNALAMPLITUDE

.

ADJUSTABLE, DELAYED AGC FOR PNP
TUNERS

DESCRIPTION

TheTDA4443 is a Video IF amplifier with standard
switchfor multistandardcolourormonochromeTV
sets,and VTR’s.

DIP16

(Plastic Package)

ORDER CODE : TDA4443

PINCONNECTIONS

STANDARD SWITCHING

IF AGC TIMECONSTANT

DELAYED TUNER AGC OUTPUT

REFERENCE LC NETWORK

December 1992

IF INPUT

GROUND

TUNERAGC ADJUST

GATINGPULSE INPUT

1
2
3
4
5
6
7
8

16
15
14
13
12
11
10

IF INPUT
GROUND
NOT TO BE CONNECTED
SUPPLYVOLTAGE V
NOT TO BE CONNECTED
VIDEO SIGNAL OUTPUT
DISCHARGETIME CONSTANT

9

REFERENCELC NETWORK

CC

4443-01.EPS

1/7

TDA4443

BLOCK DIAGRAM

VIDEO

OUTPUT

IF INPUT
IF INPUT

V

S

TDA4443

16

1

3

15

STANDARD

WIDEBANDAMPLIFIER DEMODULATOR

CONTROL

AMPLIFIER

TUNER

CONTROL

SWITCH

2

TUNER

AGC

OUTPUT

TUNER
AGC
ADJUST

SUPPLY

UNIT

1345 6

V

CC

11 10

IW

VIDEO

GATING

AMPLIFIER

9

8

GATING

7

PULSE

4443-02.EPS

GENERALDESCRIPTION

This video IF processing circuit integratesthe fol­lowingfunctionalblocks :

.

Three symmetrical, very stable, gain controlled
wideband amplifier stages - without feedback
by a quasi-galvaniccoupling.

.

Demodulatorcontrolled by the picture carrier

.

Video output amplifier with high supplyvoltage

rejection

.

Polarityswitch for the video outputsignal

.

AGC onpeakwhite level

.

GatedAGC

.

Dischargecontrol

.

Delayedtuner AGC

.

At VTR Reading mode the video output signal
isat ultrawhite level

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ABSOLUTEMAXIMUM RATINGS

Symbol Parameter Value Unit

V

CC

V

0

V

ext

I

4

I

2

I

0

I

0

P

tot

T

j

T

AMB

T

stg

Supply Voltage RangePin 13 15 V
Open Loop Voltage Pin 5 max. V

CC

External Voltage Pin 4 12 V
Control Current for VTR Mode Pin 4 0.3 mA
Control Current for Standard Mode Pin 2 0.5 mA
Max. Video Output Current Pin 11 5 mA
Short Circuit Current (t ≤ 1sec) Pin 11

30 mA
Power Dissipation 1 W
Junction Temperature 125
Ambient Temperature Range 0 to +70
Storage Temperature Range -25 to +125

THERMALDATA

TDA4443

V

o

C

o

C

o

C

4443-01.TBL

Symbol Parameter Value Unit

R

th (j-a)

Junction-ambient Thermal Resistance 70

ELECTRICAL OPERATING CHARACTERISTICS

=25oC, VCC=12V,unless otherwise spacified.Test Circuit Page5.

T

AMB

Symbol Parameter Pin Min. Typ. Max. Unit

V

CC

I

CC

V

11

V

AA

V

O

V

O

∆(Vp−V

V

− V

p

blank

∆Vblack
∆Vwhite
∆Vvideo

Bvideo Video Bandwidth at -3dB 11 6 MHz

∆Vvideo

I

O

I

7

V

7

V

1

I Control Current for Status B (see status of mode switching)

Supply Voltage 13 10 12 15 V
Supply Current (VCC= 12V, V4= 3.5V,VIN=0)

13 55 75 mA

Pin 6, PIn7, PIn 2 open
Ultra White Level at Standard B/G

= 15V, V4= 3.5V

V

CC

Ultra Black Clamping Level at Standard B/G

11 4.8 5.1 5.6 V

11 1.70 1.85 2.10 V

SIGNAL 1
Picture to sync. output voltage of the video signal without load in

11 2.6 2.9 3.3 V

standard B/G (residual carrier 10%) SIGNAL 1
Picture to blanking level output voltage of thevideo signal without

11 1.80 2.1 2.40 V
load in standard L (blanking level at 28%of carrier amplitude)
SIGNAL 2 (residual carrier 5%)

)

blank

Output voltagechange of the picture to blanking level from
standard L tostandard B/G (mode BG : signal 1, mode L : signal 2)

11 10 %
Supply voltage influence on the ultra black level in standard B/G 11 0.5 %V

Supply voltage influence on the ultra white level in standard B/G 11 1 %V
Video Bandwidth

Video Signal Attenuation with V

at 4.43MHz

IN

11 1 1.5 dB

Video frequency response changes witin the AGC range 11 0.5 2.0 dB
DC Output Current(V11= 10V, VCC= 15V) 11 1.5 2 mA
Gating Pulse Current 7 0.30 1.0 mA
DC Voltage at Gating Input 7 1.3 1.6 V
Input Voltage Sensitivity VIN(with V

Standard B/G SIGNAL 1

OUT=VO

- 3dB)

1-

16

120

21040µ

=5V

V

2

o

C/W

PP

PP

µV

RMS

A

4443-02.TBL

4443-03.TBL

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