TDA4452 [TEMIC]
Video IF Amplifier for Multistandard TV Receiver and VTR Appliances; 视频中频放大器用于多标准的电视接收器和录像机设备
| 型号： | TDA4452 |
| 厂家： | 
TEMIC SEMICONDUCTORS |
| 描述： | Video IF Amplifier for Multistandard TV Receiver and VTR Appliances |
| 文件： | 总11页 (文件大小：183K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TDA4452
Video IF Amplifier for Multistandard TV Receiver and VTR
Appliances
Technology: Bipolar
Features
Standard B/G-L suitable, processes negatively and
positively modulated IF-signals with equal polarity of
the output signal
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
Ultra white inverter and ultrablack limiter for
reducing transmission interference
Standard B/G: AGC acting on the sync. pulse peak
Constant input impedance
Internally noise protected gain control, no flyback
pulses required
Video output voltage with narrow tolerance
Video input/output for insertion of external sound trap
VTR input/output with video switch
Adjustable, delayed AGC for the tuner
ESD protected
Expanded video frequency response allows the
demodulation of amplitude modulated MAC signals
High input sensitivity
Minimal intermodulation distortions
Small differential error
Case: DIP18
Figure 1. Block diagram
TELEFUNKEN Semiconductors
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TDA4452
Pin Description
Pin
Function
Pin
8,17
9
Function
1,18
IF input
Video switch control
VTR input, 1 V
Ground
2
3
4
Video output, 3 V from demodulator
PP
10,11
12
Demodulator circuit
PP
VTR output, 2 V
(inverted)
standard switch B/G-L
Average capacitor standard L
Tuner AGC take over
AGC (tuner control)
PP
13
5
6
7
Supply voltage V
S
14
Video output, 2 V
PP
15
Video input, after sound trap, 2 V
PP
16
IF AGC storage capacitor
Circuit Description
The following functional units are integrated in this The standard switch also adapts the operating point of the
circuit combination for processing multi standard video post-amplifier and the IF AGC to the standard
television IF signals:
which is to be processed. In the case of standard B/G, the
synchronous peak value acts as the control criterion for
rapid charging and discharge. In contrast, rapid control is
achieved for standard L by charging for ultra white and
discharge by the average (Pin 13) with controlled
reference.
The IF signal is supplied to the synchronous demodulator
via a three-stage gain controlled wideband amplifier. A
level detector limits the output voltage of the wideband
amplifier in the event of overdrive.
An adjustable control current output (Pin 15) is available
for delayed control of the tuner pre-stage.
The required switching carrier for the demodulator is
obtained from the IF signal of the wideband amplifier by
means of a selection and limiter stage. A delay network
is connected upstream of the demodulator in order to
compensate phase differences.
A video source switch with 2 inputs is integrated for VTR
applications. The external VTR signal is supplied
capacitively to the input Pin 3 and is clamped to the
synchronous peak value. The second video input Pin 7 is
connected with Pin 9 (video signal from demodulator) via
an external sound trap.
The polarity of the switching carrier at the output of the
limiter stage can be reversed with the standard switch
(Pin 12), with the result that negatively or positively The sound trap must process an attenuation for dc and ac
modulated IF signals appear at the demodulator output of 3.5 dB so that the video switch is not overdrived. In
with the same polarity. The demodulated video signal is addition, the demodulated video signal is available in in-
filtered and amplified and is supplied to the video output verted form as a VTR output signal at Pin 4, independent
(Pin 9) via a noise limiter stage.
of the position of the video switch.
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Rev. A1, 15-Aug-96
TDA4452
Absolute Maximum Ratings
Reference point Pin 8, unless otherwise specified
Parameters
Symbol
Value
10 to 13.5
Unit
Supply voltage range
External voltage
Pin 5
V
S
V
Pin 2, 4, 12, 15
Pin 9, 16
Pin 6
V
V
S
8
6
2,4,12,15
V
9,16
V
V
6
Video output current,max load
Short circuit max 1 s
Pin 4, 6, 9
Pin 4, 6, 9
I
5
30
mA
mA
°C
0
I
0
Junction temperature
T
125
j
Ambient temperature range
Storage temperature range
T
–25 to +70
–25 to +125
°C
amb
T
°C
stg
Thermal Resistance
Parameters
Symbol
Value
60
Unit
K/W
Junction ambient, in soldered position
R
thJA
Electrical Characteristics
V = +12 V, T
= 25°C, reference point Pin 8, unless otherwise specified
S
amb
Parameters
Supply voltage
Supply current
Test Conditions / Pins
Symbol
Min.
10
Typ.
44
Max.
13.5
52
Unit
Pin 5
Pin 5
V
S
V
I
38
mA
S
IF amplifier and AGC, Pins 1, 18
Min. input voltage
V
70
120
65
100
V
mV
dB
i
Max. input voltage
V
i
100
60
IF AGC gain reduction
Input impedance
∆v
p
R
C
1.2
2
k
pF
i
i
Response time of the peak
white control
in standard L
Pin 16
Pin 15
t
10
s
r
1)
Available tuner AGC
I
5
mA
dB
15
Automatic tuner AGC with
IF control
AGC
61
2)
Demodulator and output stage , Pin 9
Ultra white level at stan-
dard B/G
V
7.1
4.0
2.7
7.5
4.2
3.0
7.9
4.4
3.3
V
V
V
o
Ultra black clamping level
at standard B/G
V
o
Composite video output
3)
signal B/G
v
o(pp)
1)
Notes: A peak white value for at least 10 s must be transmitted for each complete frame
2)
All measurements Pin 9 without load
Residual carrier 10%
3)
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Parameters
Test Conditions / Pins
Symbol
Min.
3.8
Typ.
4.0
Max.
4.2
Unit
V
Ultra black level at
standard L
V
0
White level at standard L
V
6.8
7.2
2.1
2.5
7.6
V
V
0
4)
Video signal standard L
Output dc current
v
1.85
2.35
0(pp)
V = 8 V
9
I
mA
%
9
Difference of the video
signals, standards L and
B/G
∆
10
Upsetting factor sync. pulse
VSync
3
5
%
%
VSync
Tild between black and
white
10
Clamping level of black
limiter
V
9
V
9
V
9
250 mV
below sync. (typ)
Threshold of the ultra white
inverter
900 mV
above ultra white level (typ)
Grey level of the ultra
white inverter
5.9
V
Video bandwidth (–3 dB)
B
8.5
52
10
MHz
dB
video
Video frequency response
over the AGC range
∆V
2.0
video
Differential gain error
Differential phase error
Sound-chroma beat
d
3
3
%
degree
dB
(1.07 MHz intermodula-
tion) relating to demodu-
lated auxiliary colour
carrier (figure 3)
IM
video carrier = 0 db
video carrier = –6 db
video carrier = –24 db
IF residual voltage at the
video output
f = 38.9 MHz
f = 77.8 MHz
v
15
10
mV
Standard switch,
Pin 12
Control voltage standard
B/G
V
2.4
0
V
V
V
12
S
Control voltage standard L
(Pin 12 not connected;
standard B/G)
V
12
1.9
Video switch
Pin 2
Control voltage for
RF operation
VTR operation (Pin 2 not
connected; VTR operation)
V
V
1.9
2
2
2.4
V
S
V
V
Clamp level
Pin 3
Pin 7
V
3
V
7
1.4
2.5
Composite video output
voltage
1 V at Pin 3 resp.
pp
2 V at Pin 7
Pin 6
v
6(pp)
2.0
V
pp
4)
Note: Blanking level 30% carrier amplitude
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TDA4452
Parameters
Sync. pulse level
Test Conditions / Pins
Pin 6
Symbol
Min.
Typ.
2.0
10
Max.
Unit
V
V
6
Video switch bandwidth
Output current
–3 dB
V = 5 V
Pin 6
Pin 6
Pin 6
B
MHz
mA
dB
I
2.0
55
6
6
Cross talk
v = 1 V
3
50 Hz to 10 MHz sin
= 0 V, V = 0 V,
v
1–18
2
V
16
= 4 V
VTR output,
Pin 4
Composite video output
(inverted)
V = 2 V
v
4(pp)
2.0
V
V
7
pp (peak to peak)
Sync. pulse level
Output current
V
4
V – 2.6
S
V = 10 V
4
I
2.0
mA
4
Figure 2. Test circuit
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TDA4452
Figure 3. Test of intermodulation
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TDA4452
Figure 4. Application circuit
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TDA4452
Pin 1,18
IF input
Pin 2
Video switch
Pin 4
VTR output
Pin 3
VTR input
Pin 7
Input (from sound trap)
Pin 6
Output video
switch
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TDA4452
Pin 9
Video output
Pin 10,11
Demodulator
Pin 12
Standard switch
Pin 13
Averaging
(standard L only)
Pin 16
IF ACC
Pin 14,15
Tuner ACC
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TDA4452
Dimensions in mm
Package: 18-pin dual inline plastic
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TDA4452
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban
on these substances.
TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of
continuous improvements to eliminate the use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain
such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or
unauthorized use.
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423
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