TEMIC TDA4439 Datasheet

TELEFUNKEN Semiconductors

TDA4439

Video IF Amplifier for Multistandard TV and VTR

Technology: Bipolar

Features

D

Standard B/G-L suitable, processes negatively and

positively modulated IF-signals with equal polarity of

the output signal

D

Ultra white inverter and ultra black limiter for reduc­ing transmission interference

D

Internally noise protected gain control, no flyback
pulses required

D

Expanded video frequency response allows the de­modulation of amplitude modulated MAC signals

Case: DIP18

D

High input sensitivity

D

Fast AGC by controlled discharge of the AGC capacitor

Standard L mode: AGC acting on peak white level,

capacitor discharge control by averaged video signal

Standard B/G: AGC acting on the sync. pulse peak

D

The direction of the AFC curve is selectable indepen­dently from the standard switch

Figure 1. Block diagram

Rev . A1: 14.09.1995 1 (7)

TDA4439

Pin Description

TELEFUNKEN Semiconductors

1

16

1, 18 IF input

2 Standard switch: open B/G

Pin Function

2

15

ground L

3, 17 Ground

3

14

4 IF-AGC storage capacitor
5 AGC (tuner control)

4

13

6 Tuner AGC take over
7 Polarity switch:

5

6

12

11

8, 11 Demodulator circuit
9, 10 AFC circuit

open AFC “DOWN”
ground AFC

“UP”

12 AFC output

7

10

13 Average capacitor standard L
14 Video output

8

95 10840

9

15 Supply voltage
16 n.c.

Circuit Description

The following function units are integrated in this circuit combination for video-IF processing:
– Three symmetric, highly stable, gain controlled wide-

band amplifier, quasi galvanic coupling eliminates

feed back
– Video carrier controlled demodulator of high linearity
– Polarity switch over for video and AFC-signal
– Video output amplifier with low-pass characteristics,

limiter for ultra black and inverter for ultra white

interference

– Disconnectable AFC * generator with push pull

current output

– High impedance, interference free controlled voltage

facilities, best possible AGC time constant with small

storage capacitor
– Controlled discharge circuit for fast gain control
– With VTR * operation the video output level is

according to the ultra white level in B/G, ultra black

level in L

Absolute Maximum Ratings

Reference point pin 3, unless otherwise specified

Parameters Symbol Value Unit
Supply voltage Pin 15 V
Supply current Pin 15 I
Open loop voltage Pin 5 V
External voltage Pin 4

Pin 14
Breaking current for VTR operation Pin 4 I
Video output current

max load Pin 14

short circuit max 1 s Pin 14
Power dissipation T
Junction temperature T
Ambient temperature range T
Storage temperature range T

≤ 60°C P

amb

V

V

I

tot

amb

stg

S

14
4

0

S

10 to 15 V

75 mA

5
4

V

10

S

8

V
V

V

0.5 mA

5

mA

50

1.0 W

j

125 °C

–25 to +70 °C

–25 to +125 °C

Rev . A1: 14.09.19952 (7)

TELEFUNKEN Semiconductors

Thermal Resistance

Parameters Symbol Maximum Unit

Junction ambient R

Electrical Characteristics

thJA

TDA4439

60 K/W

V

= 12 V, T

S

= 25°C, Reference point Pin 3, unless otherwise specified

amb

Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit
Supply current Pin 15 I
Ultra white level at

1)

standard B/G Pin 14 v
Ultra black clamping level

at standard B/G
Composite video output

2)

Pin 14 v

signal B/G Peak to peak Pin 14 v
Video signal standard L

3)

(black/white) Peak to peak Pin 14 v
Difference of the video
signals

standard L-B/G

Pin 14 ∆ 10 %

Clamping level of black
limiter

Pin 14 V

Threshold of the ultra white
inverter

Pin 14 V

Grey level of the ultra white
inverter

Pin 14 V

Supply voltage influence on
the ultra black level in
standard B/G

Pin 14 ∆ 0.5 %/V

Supply voltage influence on
the ultra white level in
standard B/G

Pin 14 ∆ 1.0 %/V

Video bandwidth –3 dB Pin 14 B
Video frequency response

over the AGC control range
Output DC current

Response time of the peak

V

= 8 V Pin 14

14

4)

Pin 14 ∆V

white control in standard L Pin 4 t
Voltage level standard B/G
Voltage level standard L
Input sensitivity (sym.)

5)

5)

6)

v14=3.0 Vpp,

= 0.8 V Pin 1–18 v

V

4

Pin 2 V
Pin 2 V

IF-AGC gain reduction ∆v
Available tuner AGC

10 dB via AGC use

Pin 5 I

Automatic tuner AGC with
IF-control Pin 6 n.c.

Pin 5 AGC 61 dB

S

0

0

0

0

14

14

14

video

video

I

14

r

2
2

i

p

5

65 mA

4.8 5.2 5.6 V

1.75 1.9 2.05 V

2.7 3.0 3.3 V

1.85 2.1 2.35 V

250 mV below Sync. (typ.)

900 mV upper ultra white level (typ.)

3.6 V

10 MHz

2.0 dB

2.8 mA

2 V

10

S

m

0 1.2 V

120

m

60 dB

3 4 mA

s

V

V

Rev . A1: 14.09.1995 3 (7)