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TELEFUNKEN Semiconductors
TDA4455
Multistandard VIF Amplifier and PLL Demodulator
Application
Monolithic integrated circuit for vision IF signal processing in multistandard TV and VTR sets.
Description
This multistandard video IF processing circuit with PLL picture carrier regeneration gives a high performance of linear video demodulation. With two IF inputs (Pins 1-2 and Pins 17-18), it is possible to select between two signal sources. The input selector switch (Pin 16) works independent from the standard switch (Pin 11). The IF signal is internally fed via a 3-stage controlled wideband amplifier to the video demodulator and the phase detector. The phase detector compares the phase of IF signal (0) with the output signal of the VCO (90) and sets the VCO frequency accordingly. A lock detector switches the PLL loop filter according to the state of the PLL (locked-PLL slow, unlocked-PLL fast). A second output of the VCO (0) provides the reference carrier for the video demodulator. The polarity of the demodulator can be inverted by the standard switch (Pin 11), so that negative or positive modulated IF signals are always available with the same polarity at the demodulator output. The demodulated video signal is filtered, amplified and fed via an interference limiter to the video output (Pin 7). The standard switch also determines the clamp level of the video amplifier and the required IF-AGC mode. In the standard B/G mode the sync peak value is the criterion for a fast charge and discharge. In the standard L mode on the other hand, fast AGC action is achieved by charging at peak white level and discharging by the averaged video signal (time constant on Pin 8). The response level for discharge has a hysteresis. In the D2MAC mode a similar function is applied to achieve the AGC, but with different threshold levels. An overload detector prevents the PLL becoming unlocked by large IF input signals. To achieve a delayed tuner-AGC action, the current output (Pin 4) can be adjusted with a resistor at Pin 3.
Features
D Suitable for standard B/G, L and D2MAC, processes
negative and positive modulated IF-signals with equal polarity of the output signal
D Standard L: fast AGC acting on peak white level with
average value controlled capacitor discharge and reference hysteresis
D Two IF-inputs, for switching between two signal
sources (e.g., two tuners and two SAW-filters)
D D2MAC: fast AGC acting on peak level with
controlled capacitor discharge
D Output for delayed tuner-AGC, take over point
adjustable
D High performance video demodulator with PLL
picture carrier regeneration
D Extended video bandwidth (12 MHz) for the demodulation of amplitude modulated MAC-signals
D Standard B/G: AGC acting on the sync peak pulse
D D D D D
High input sensitivity Ultra white and ultra black limiting Supply voltage range 6.8 to 13 V Low power consumption ESD protection
Package Options
Case: 18-pin DIL plastic
Rev. A1: 08.05.1995
Preliminary Information
1 (12)
TDA4455
Block Diagram
Input selector switch Loop filter 16 13 12 10 VCO Tank 9
TELEFUNKEN Semiconductors
93 7502
11 Standard switch B/G L D2MAC RO
17 IF Input 2 18 1 IF Input 1 2
Lock detector
Video
VCO
=
+
90 0 Interference rejection Overload detector B/G
7 Video output
+/- 4 Tuner AGC 3 Tuner AGC take over 6 IF AGC
D2MAC 15 VS 8 Average (only L, D2MAC) 14 Int. Ref
L
5
Pin Description
Pin 1, 2 3 4 5, 14 6 7 8 Symbol Function IF input 1 Tuner AGC adjustment (turn over point) Delayed tuner AGC current Ground IF AGC time constant Video output Video averaging for standard L and D2MAC Pin 9, 10 11 12 13 15 16 17, 18 Symbol Function VCO circuit Standard switch PLL loop filter PLL time constant switch Supply voltage Input selector switch IF input 2
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Preliminary Information
Rev. A1: 08.05.1995
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reference point Pin 4, unless otherwise specified
*)
Rev. A1: 08.05.1995
External Voltage
Thermal Resistance
Absolute Maximum Ratings
TELEFUNKEN Semiconductors
Parameters Junction ambient (when soldered to PCB)
Supply voltage Supply current Output current Maximum power dissipation Junction temperature Ambient temperature Storage temperature
min(Vs, xV): the lesser of the two values is the lower limit
Pin 1, 2 3 4 6 7 8 9, 10 11 12 13 15 16 17, 18
Parameters
Voltage range *) 0 Vpin min (Vs, 8 V) 0 Vpin Vs 0 Vpin min (Vs, 10 V) 0 Vpin min (Vs, 10 V) 0 Vpin 6 V 0 Vpin min (Vs, 8 V) 0 Vpin Vs 0 Vpin Vs 0 Vpin min (Vs, 7.5 V) 0 Vpin Vs 6.8 V Vpin Vs 0 Vpin Vs 0 Vpin min (Vs, 8 V)
vv vv vv vv vv vv vv vv vv vv vv vv vv
Preliminary Information
Symbol RthJA Symbol Vs IS Iout P Tj Tamb Tstg Value 6.8 to 13.0 60 5.0 720 +125 -25 to +85 -25 to +125 Value 60
TDA4455
Unit K/W
Unit V mA mA mW C C C
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Vs = 8 V, Tamb = 25C, reference point Pin 5, unless otherwise specified
Electrical Characteristics
TDA4455
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Parameters DC-supply Supply voltage Supply current IF-amplifier Input sensitivity Input impedance Input capacitance IF-AGC IF gain control range Response time, standard L AGC capacitor Average capacitor Tuner-AGC Available tuner-AGC current Automatic turn over point PLL PLL capture range VCO-tuning range VCO-tuning sensitivity Video demodulator output Composite video output signal standard B/G Video output signal standard L Difference of the video signals Ultra white level, standard B/G Ultra black level, Stand. L Supply voltage influence on the ultra black level (B /G) Supply voltage influence on the ultra black level (L) Video bandwidth (-3 dB) Video frequency response over the AGC range Differential gain error Differential phase error Video demodulator output Sound chroma beat (1.07 MHz intermodulation) related to demodulated auxiliary colour carrier.
Pin 7 Picture carrier = 0 dB Colour carrier = -6 dB Sound carrier = -24 dB
Zero carrier level
Zero carrier level
Standard B/G and L
Note 5
Pin 7 Note 4
Note 1
Pins 1-2 or Pins 17-18 sync peak value, B/G
Test Conditions / Pins Pin 15
Pins 9-10, 12, 13
Preliminary Information
Pins 3 and 4 Pins 6 and 8 see note 3 Gv,tun see note 2 Symbol
Dfcap Dfvco Df / Du
DVout
DV/V
DV/V
Gv tAGC C6 C8
Vout
Vout
DG DF
aIM
DB
Vin Rin Cin
V7
V7
Vs Is
I4
B
Min.
1.2
1.8
3.0
6.8
52
12
60
TELEFUNKEN Semiconductors
1.5 3.0 4.5
Typ.
0.5
1.9 0.5
4.2
1.4
2.0
4,7 68
80 1.2 2
8.0 50
65
66
3 3
4
Rev. A1: 08.05.1995 Max. 13.0 60 120 2.0 1.6 2.2 10 10 MHz MHz kHz/mV Veff kW pF MHz dB dB sec F nF %/V V %/V Unit Vpp Vpp mA V mA % deg dB % V dB
TELEFUNKEN Semiconductors
Parameters IF residual voltage f = 38.9 MHz f = 77.8 MHz Upsetting factor of sync pulse in the AGC range Tilt of half picture between black and white Ultra black limiting threshold Ultra white limiting threshold Standard switch Control voltage B/G Control voltage L Control voltage D2MAC Input selector switch Control voltage - input 1 active Control voltage - input 2 active Test Conditions / Pins Symbol Vres1 Vres2 Min. Typ. 2 5 3 5
TDA4455
Max. Unit mV mV % %
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DVsync
Vsync Standard L 10 Below sync level
DVlim1 DVlim2
Vsw1 Vsw2 Vsw3
250 500
mV mV
Above ultra white level Pin 11
Note 6
2.5 0 5.0 5.0 0
4.0 1.5 Vs VS
V V V V V
Pin 16
Note 7
2.5
Notes 1. A peak white value for at least 10 s must be transmitted for each complete frame 2. Loop filter: R1 = 500 W - 1 k, C1 = 0.47 mF Capacitor VCO circuit: CVCO = 27 - 47 pF 3. Pin 7 unloaded 4. Residual carrier: 10% carrier amplitude 5. Blanking level: 30% carrier amplitude 6. Without control voltage at Pin 11 - standard B/G is automatically selected 7. Without control voltage at Pin 16 - input 1 is automatically active
Alignment of the VCO 1. Apply 4.5 V to Pin 6, to disable the broadband amplifier. 2. Measure the dc-voltage at Pin 12 (phase detector). 3. Apply a 38.9 MHz unmodulated carrier signal to the IF input (Pins 1-2 or Pins 17-18); adjust the input level so that the AGC voltage at Pin 6 is between 2.0 V and 2.5 V. 4. Adjust the VCO circuit until at Pin 12 is the same DCvoltage as measured in step 2.
Rev. A1: 08.05.1995
Preliminary Information
5 (12)
TDA4455
Pin Related Internal Circuits (Continued)
TELEFUNKEN Semiconductors
1, 17
1.2 kW
1.2 kW
2, 18
3 kW
3 kW
93 7675
Figure 1. Pin 1-2, Pin 17-18
93 7676
93 7678
50 W 3 kW 3 2 kW
Figure 2. Pin 3
6
Figure 4. Pin 6
93 7677
4
7
93 7879
Figure 3. Pin 4
Figure 5. Pin 7
6 (12)
Preliminary Information
Rev. A1: 08.05.1995
TELEFUNKEN Semiconductors
TDA4455
12 kW 1 kW 2.7 V 12 kW
Pin Related Internal Circuits (Continued)
8 7 kW 12
Figure 9. Pin 12
93 7683
93 7680
Figure 6. Pin 8
13
9 10
93 7684
Figure 10. Pin 13
93 7681
Figure 7. Pin 9-10
93 7685
12.5 W 12.5 W 300 W 16 11
Figure 8. Pin 11
93 7682
Figure 11. Pin 16
Rev. A1: 08.05.1995
Preliminary Information
7 (12)
TDA4455
IF-AGC, Switching Thresholds
93 7645
TELEFUNKEN Semiconductors
4.2 V Ultra white level: zero carrier 4.0 V White level: 10 % carrier
2.0 V Sync. peak level: 100% carrier (charge / discharge threshold)
Figure 12. B/G-standard (neg. modulated)
93 7646
4.0 V Peak level: 100 % carrier (charge threshold)
[ 2.4 V
Figure 13. L-standard (pos. modulated)
Average discharge threshold
2.0 V Sync. peak level :
v 6 % carrier
1.9 V Ultra black level: zero carrier
93 7647
[ 4.1 V Average discharge threshold
4.2 V 4.0 V DC value: zero carrier White level: 10 % carrier Analog: Chrominance Diff.: Signal Analog: Luminance Signal
Dig.: Sound +Sync.
2.0 V
Figure 14. D2MAC-standard (neg. modulated)
Black level: 100 % carrier (charge threshold)
8 (12)
Preliminary Information
Rev. A1: 08.05.1995
Test Circuit
Rev. A1: 08.05.1995 IF input switch + VS 22 m H 10 nF 10 m F C1 470 nF 14 13 12 11 10 10 nF 38.9 MHz R1 1 kW Standard switch 10 nF 18 17 16 15 TDA 4455 LVCO 1 2 10 k W 4.7 m F 3 4 5 6 C VCO 7 8 68 nF
93 7686
IF 2
1:2
4.7 nF
200 W
TELEFUNKEN Semiconductors
4.7 nF
9
Preliminary Information
IF AGC Tuner AGC take over Tuner AGC Video
IF 1
1:2
4.7 nF
200 W
TDA4455
4.7 nF
9 (12)
TDA4455
Application Circuit
10 (12)
+ VS Standardswitch 22 mH 8 10 nF 10 nF 7 1kW 4.7 mF 22 mH 6 TSF 5315 18 13 17 16 15 14 5 CVCO TDA 4455 8 10 nF 7 22 k W TSF 5315 5 Tuner AGC take over Tuner AGC IF AGC Video 1 2 3 4 5 6 7 470 4.7 mF 8 9 LVCO 12 470 nF 11 10 38.9 MHz
1
IF 2
50
W
2
4.7 nF
U 4744 B
3
10 nF
4
1
IF 1
50
W
Preliminary Information
W
68 nF 6
2
4.7 nF
U 4744 B
3
10 nF
93 7687
4
TELEFUNKEN Semiconductors
Rev. A1: 08.05.1995
TELEFUNKEN Semiconductors
TDA4455
Dimensions in mm
Package: DIP 16
94 9128
Rev. A1: 08.05.1995
Preliminary Information
11 (12)
TDA4455
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to
TELEFUNKEN Semiconductors
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
12 (12)
Preliminary Information
Rev. A1: 08.05.1995

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