View TDA4452_471217.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

TDA4452
Video IF Amplifier for Multistandard TV Receiver and VTR Appliances
Technology: Bipolar Features
D Standard B/G-L suitable, processes negatively and
positively modulated IF-signals with equal polarity of the output signal
D Fast AGC by controlled discharge of the AGC
capacitor
D Ultra white inverter and ultrablack limiter for
reducing transmission interference
D 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 Internally noise protected gain control, no flyback
pulses required
D Expanded video frequency response allows the
demodulation of amplitude modulated MAC signals
D High input sensitivity D Minimal intermodulation distortions D Small differential error
D D D D D D
Constant input impedance 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
Case: DIP18
Figure 1. Block diagram
TELEFUNKEN Semiconductors Rev. A1, 15-Aug-96
1 (11)
TDA4452
Pin Description
Pin 1,18 2 3 4 5 6 7 Function IF input Video switch control VTR input, 1 VPP VTR output, 2 VPP (inverted) Supply voltage VS Video output, 2 VPP Video input, after sound trap, 2 VPP Pin 8,17 9 10,11 12 13 14 15 16 Function Ground Video output, 3 VPP from demodulator Demodulator circuit standard switch B/G-L Average capacitor standard L Tuner AGC take over AGC (tuner control) IF AGC storage capacitor
Circuit Description
The following functional units are integrated in this circuit combination for processing multi standard television IF signals: 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. 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. 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 modulated IF signals appear at the demodulator output with the same polarity. The demodulated video signal is filtered and amplified and is supplied to the video output (Pin 9) via a noise limiter stage. The standard switch also adapts the operating point of the video post-amplifier and the IF AGC to the standard 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. An adjustable control current output (Pin 15) is available for delayed control of the tuner pre-stage. 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 sound trap must process an attenuation for dc and ac of 3.5 dB so that the video switch is not overdrived. In addition, the demodulated video signal is available in inverted form as a VTR output signal at Pin 4, independent of the position of the video switch.
2 (11)
TELEFUNKEN Semiconductors Rev. A1, 15-Aug-96
TDA4452
Absolute Maximum Ratings
Reference point Pin 8, unless otherwise specified Parameters Supply voltage range External voltage Pin 5 Pin 2, 4, 12, 15 Pin 9, 16 Pin 6 Pin 4, 6, 9 Pin 4, 6, 9 Symbol VS V2,4,12,15 V9,16 V6 I0 I0 Tj Tamb Tstg Value 10 to 13.5 VS 8 6 5 30 125 -25 to +70 -25 to +125 Unit V V mA mA C C C
Video output current,max load Short circuit max 1 s Junction temperature Ambient temperature range Storage temperature range
Thermal Resistance
Parameters Junction ambient, in soldered position Symbol RthJA Value 60 Unit K/W
Electrical Characteristics
VS = +12 V, Tamb = 25C, reference point Pin 8, unless otherwise specified Parameters Test Conditions / Pins Supply voltage Pin 5 Supply current Pin 5 IF amplifier and AGC, Pins 1, 18 Min. input voltage Max. input voltage IF AGC gain reduction Input impedance Response time of the peak white control in standard L 1) Available tuner AGC Automatic tuner AGC with IF control Demodulator and output stage 2), Pin 9 Ultra white level at standard B/G Ultra black clamping level at standard B/G Composite video output signal B/G 3) Pin 16 Symbol VS IS Vi Vi vp Ri Ci tr Min. 10 38 Typ. 44 70 120 65 1.2 2 Max. 13.5 52 100 Unit V mA
mV
mV dB kW pF
100 60
10
ms
Pin 15
I15 AGC
5 61
mA dB
Vo Vo vo(pp)
7.1 4.0 2.7
7.5 4.2 3.0
7.9 4.4 3.3
V V V
Notes: 1) A peak white value for at least 10 ms must be transmitted for each complete frame 2) All measurements Pin 9 without load 3) Residual carrier 10%
TELEFUNKEN Semiconductors Rev. A1, 15-Aug-96
3 (11)
TDA4452
Parameters Ultra black level at standard L White level at standard L Video signal standard L 4) Output dc current Difference of the video signals, standards L and B/G Upsetting factor sync. pulse Tild between black and white Clamping level of black limiter Threshold of the ultra white inverter Grey level of the ultra white inverter Video bandwidth (-3 dB) Video frequency response over the AGC range Differential gain error Differential phase error Sound-chroma beat Test Conditions / Pins Symbol V0 V0 V9 = 8 V v0(pp) I9 Min. 3.8 6.8 1.85 Typ. 4.0 7.2 2.1 2.5 Max. 4.2 7.6 2.35 10 Unit V V V mA %
DVSync
V Sync
3 5 10
% %
V9 V9 V9 Bvideo Vvideo d (1.07 MHz intermodulation) relating to demodulated auxiliary colour carrier (figure 3) video carrier = 0 db video carrier = -6 db video carrier = -24 db f = 38.9 MHz f = 77.8 MHz Pin 12 8.5
250 mV below sync. (typ) 900 mV above ultra white level (typ) 5.9 10 2.0 3 3 52
V MHz dB % degree dB
aIM
IF residual voltage at the video output Standard switch, Control voltage standard B/G Control voltage standard L (Pin 12 not connected; standard B/G) Video switch Control voltage for
v
15 10 2.4 0 VS 1.9
mV
V12 V12
V V
Clamp level Composite video output voltage
Pin 2 RF operation VTR operation (Pin 2 not connected; VTR operation) Pin 3 Pin 7 1 Vpp at Pin 3 resp. 2 Vpp at Pin 7 Pin 6
V2 V2 V3 V7 v6(pp)
2.4 1.4 2.5 2.0
1.9 VS
V V
V
Note:4) Blanking level 30% carrier amplitude
4 (11)
TELEFUNKEN Semiconductors Rev. A1, 15-Aug-96
TDA4452
Parameters Sync. pulse level Video switch bandwidth Output current Cross talk Test Conditions / Pins Pin 6 -3 dB Pin 6 V6 = 5 V Pin 6 v3 = 1 V Pin 6 50 Hz to 10 MHz sin v1-18 = 0 V, V2 = 0 V, V16 = 4 V Pin 4 V7= 2 Vpp (peak to peak) V4 = 10 V v4(pp) V4 I4 2.0 VS - 2.6 2.0 V V mA Symbol V6 B I6 Min. Typ. 2.0 10 2.0 55 Max. Unit V MHz mA dB
VTR output, Composite video output (inverted) Sync. pulse level Output current
Figure 2. Test circuit
TELEFUNKEN Semiconductors Rev. A1, 15-Aug-96
5 (11)
TDA4452
Figure 3. Test of intermodulation
6 (11)
TELEFUNKEN Semiconductors Rev. A1, 15-Aug-96
TDA4452
Figure 4. Application circuit
TELEFUNKEN Semiconductors Rev. A1, 15-Aug-96
7 (11)
TDA4452
Pin 1,18 IF input
Pin 2 Video switch
Pin 4 VTR output Pin 3 VTR input
Pin 6 Output video switch
Pin 7 Input (from sound trap)
video switch
8 (11)
TELEFUNKEN Semiconductors Rev. A1, 15-Aug-96
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
TELEFUNKEN Semiconductors Rev. A1, 15-Aug-96
9 (11)
TDA4452
Dimensions in mm
Package: 18-pin dual inline plastic
10 (11)
TELEFUNKEN Semiconductors Rev. A1, 15-Aug-96
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
TELEFUNKEN Semiconductors Rev. A1, 15-Aug-96
11 (11)

▲Up To Search▲

Price & Availability of TDA4452

	To Download TDA4452 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .