TELEFUNKEN Semiconductors
TDA4439
Rev. A1: 14.09.1995
1 (7)
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 reduc-
ing transmission interference
D Internally noise protected gain control, no flyback
pulses required
D Expanded video frequency response allows the de-
modulation of amplitude modulated MAC signals
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 indepen-
dently from the standard switch
Case:
DIP18
Figure 1. Block diagram
TELEFUNKEN Semiconductors
TDA4439
Rev. A1: 14.09.1995
2 (7)
Pin Description
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
95 10840
Pin
Function
1, 18
IF input
2
Standard switch:
open B/G
ground L
3, 17
Ground
4
IF-AGC storage capacitor
5
AGC (tuner control)
6
Tuner AGC take over
7
Polarity switch:
open AFC "DOWN"
ground AFC
"
UP
"
8, 11
Demodulator circuit
9, 10
AFC circuit
12
AFC output
13
Average capacitor standard L
14
Video output
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
S
10 to 15
V
Supply current
Pin 15
I
S
75
mA
Open loop voltage
Pin 5
V
5
V
S
V
External voltage
Pin 4
Pin 14
V
4
V
14
10
8
V
V
Breaking current for VTR operation
Pin 4
I
4
0.5
mA
Video output current
max load
Pin 14
short circuit max 1 s
Pin 14
I
0
5
50
mA
Power dissipation
T
amb
60
°
C
P
tot
1.0
W
Junction temperature
T
j
125
°
C
Ambient temperature range
T
amb
25 to +70
°
C
Storage temperature range
T
stg
25 to +125
°
C
TELEFUNKEN Semiconductors
TDA4439
Rev. A1: 14.09.1995
3 (7)
Thermal Resistance
Parameters
Symbol
Maximum
Unit
Junction ambient
R
thJA
60
K/W
Electrical Characteristics
V
S
=
12 V, T
amb
=
25
°
C, Reference point Pin 3, unless otherwise specified
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Supply current
Pin 15
I
S
65
mA
Ultra white level at
1)
standard B/G
Pin 14
v
0
4.8
5.2
5.6
V
Ultra black clamping level
at standard B/G
Pin 14
v
0
1.75
1.9
2.05
V
Composite video output
2)
signal B/G
Peak to peak Pin 14
v
0
2.7
3.0
3.3
V
Video signal standard L
3)
(black/white)
Peak to peak Pin 14
v
0
1.85
2.1
2.35
V
Difference of the video
signals
standard
L-B/G
Pin 14
10
%
Clamping level
of
black
limiter
Pin 14
V
14
250 mV below Sync. (typ.)
Threshold of the ultra white
inverter
Pin 14
V
14
900 mV upper ultra white level (typ.)
Grey level of the ultra white
inverter
Pin 14
V
14
3.6
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
10
MHz
Video frequency response
over the AGC control range
Pin 14
V
video
2.0
dB
Output DC current
V
14
=
8 V
Pin 14
I
14
2.8
mA
Response time of the peak
4)
white control in standard L
Pin 4
t
r
10
ms
Voltage level standard B/G
5)
Pin 2
V
2
2
V
S
V
Voltage level standard L
5)
Pin 2
V
2
0
1.2
V
Input sensitivity (sym.)
6)
v
14
=3.0 V
pp
,
V
4
= 0.8
V
Pin 118
v
i
120
mV
IF-AGC gain reduction
v
p
60
dB
Available tuner AGC
10 dB via AGC use
Pin 5
I
5
3
4
mA
Automatic tuner AGC with
IF-control Pin 6 n.c.
Pin 5
AGC
61
dB
TELEFUNKEN Semiconductors
TDA4439
Rev. A1: 14.09.1995
4 (7)
Unit
Max.
Typ.
Min.
Symbol
Test Conditions / Pins
Parameters
IF-residual voltage at the
video output in the AGC
area
f = 38.9 MHz Pin 14
f = 77.8 MHz Pin 14
v
10
20
mV
Differential gain error
Pin 14
d
3
5
%
Differential phase error
Pin 14
ö
3
5
degree
Sound-chroma beat (1.07
MHz intermodulation) relat-
ing to demodulated auxiliary
colour carrier
Video carrier = 0 dB
Pin 14
Colour carrier = 6 dB
Sound carrier = 24 dB
a
IM
50
dB
Upsetting factor sync. pulse
DV
sync
V
sync
3
%
Input impedance
Pin 118
Pin 118
R
i
C
i
1.6
2
k
W
pF
Switch OFF voltage for
VTR-operation
Pin 4
V
4
8
10
V
Switch OFF current for
VTR-operation
Pin 4
I
4
150
mA
DC voltage at the
AFC circuit
Pins 9 and 10
V
5.0
V
Scope of the AFC voltage
Pin 12
V
1.0
V
S
1.5
V
AFC current
Pin 12
i
12
0.8
mA
AFC transconductance
Pin 12
g
0.2
mA
100kHz
AFC residual current
(AFC "OFF")
V
12
=
V
S
/2
Pin 12
±
I
R
10
mA
AFC current OFF
Pins 9 and 10
I
OFF
100
150
mA
AFC polarity switching volt-
age
7)
"AFC-up"
Pin 7
"AFC-down"
V
7
0
2
1.2
V
S
V
1)
All measurements Pin 14 without load
2)
Residual carrier 10 %
3)
,
Blanking level 30 % carrier amplitude
4)
A peak white value for at least 10
ms must be transmitted for each complete frame
5)
Direct control of standard reversing switch with TTL level
6)
Sync peak value standard B/G
7)
AFC polarity switch may be directly matched to TTL-output (i.e. processor output)
Figure 2. AFC characteristics/polarity
TELEFUNKEN Semiconductors
TDA4439
Rev. A1: 14.09.1995
5 (7)
Coil data:
Toko 7 KN
L
1
=6 turns, 0.2 CuL
L
2
=4 turns, 0.2 CuL
Figure 3. Test circuit
PDF 
ZIP