TDA4455 [TEMIC]
Multistandard VIF Amplifier and PLL Demodulator; 多标准VIF放大器和锁相环解调器
| 型号： | TDA4455 |
| 厂家： | 
TEMIC SEMICONDUCTORS |
| 描述： | Multistandard VIF Amplifier and PLL Demodulator |
| 文件： | 总12页 (文件大小：160K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TDA4455
TELEFUNKEN Semiconductors
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 are always available with the same polarity at the demo-
picture carrier regeneration gives a high performance of dulator output. The demodulated video signal is filtered,
linear video demodulation.
amplified and fed via an interference limiter to the video
output (Pin 7).
With two IF inputs (Pins 1–2 and Pins 17–18), it is
possible to select between two signal sources. The input The standard switch also determines the clamp level of
selector switch (Pin 16) works independent from the the video amplifier and the required IF-AGC mode. In the
standard switch (Pin 11).
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.
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).
An overload detector prevents the PLL becoming
unlocked by large IF input signals.
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 To achieve a delayed tuner-AGC action, the current out-
(Pin 11), so that negative or positive modulated IF signals put (Pin 4) can be adjusted with a resistor at Pin 3.
Features
Suitable for standard B/G, L and D2MAC, processes
negative and positive modulated IF-signals with equal
polarity of the output signal
Standard L: fast AGC acting on peak white level with
average value controlled capacitor discharge and
reference hysteresis
D2MAC: fast AGC acting on peak level with
controlled capacitor discharge
Two IF-inputs, for switching between two signal
sources (e.g., two tuners and two SAW-filters)
Output for delayed tuner-AGC, take over point
adjustable
High performance video demodulator with PLL
picture carrier regeneration
High input sensitivity
Ultra white and ultra black limiting
Supply voltage range 6.8 to 13 V
Low power consumption
ESD protection
Extended video bandwidth (12 MHz) for the demodu-
lation of amplitude modulated MAC-signals
Standard B/G: AGC acting on the sync peak pulse
Package Options
Case: 18-pin DIL plastic
Rev. A1: 08.05.1995
1 (12)
Preliminary Information
TDA4455
TELEFUNKEN Semiconductors
Block Diagram
Input
selector
switch
93 7502
VCO Tank
9
Loop filter
16
12
10
11
Standard switch
13
B/G
L
D2MAC
+
Video
Lock
detector
VCO
=
17
IF Input 2
R
O
90°
0°
18
1
7
Video
output
Interference
rejection
IF Input 1
2
Overload
detector
B/G
D2MAC
+/–
4
15
L
5
V
Tuner AGC
S
Int. Ref
14
6
8
3
IF AGC
Average
(only L, D2MAC)
Tuner AGC
take over
Pin Description
Pin
1, 2
3
Symbol
Function
Pin
9, 10
11
Symbol
Function
IF input 1
VCO circuit
Tuner AGC adjustment (turn
over point)
Standard switch
PLL loop filter
12
4
5, 14
6
Delayed tuner AGC current
Ground
IF AGC time constant
Video output
13
15
16
17, 18
PLL time constant switch
Supply voltage
Input selector switch
IF input 2
7
8
Video averaging for standard L
and D2MAC
2 (12)
Rev. A1: 08.05.1995
Preliminary Information
TDA4455
TELEFUNKEN Semiconductors
Absolute Maximum Ratings
reference point Pin 4, unless otherwise specified
Parameters
Supply voltage
Supply current
Symbol
Value
Unit
V
s
6.8 to 13.0
60
V
mA
mA
mW
°C
I
S
Output current
I
5.0
720
+125
–25 to +85
–25 to +125
out
Maximum power dissipation
Junction temperature
Ambient temperature
Storage temperature
P
T
j
T
amb
°C
°C
T
stg
Thermal Resistance
Parameters
Junction ambient (when soldered to PCB)
Symbol
R
thJA
Value
60
Unit
K/W
External Voltage
Pin
1, 2
3
Voltage range *)
0
0
0
0
0
0
0
0
0
0
Vpin min (V , 8 V)
s
Vpin
V
s
4
Vpin min (V , 10 V)
s
6
Vpin min (V , 10 V)
s
7
Vpin 6 V
8
Vpin min (V , 8 V)
s
9, 10
11
Vpin
Vpin
V
s
V
s
12
13
15
16
17, 18
Vpin min (V , 7.5 V)
s
Vpin
V
s
6.8 V Vpin
V
s
0
0
Vpin
V
s
Vpin min (V , 8 V)
s
*)
min(V , xV): the lesser of the two values is the lower limit
s
Rev. A1: 08.05.1995
3 (12)
Preliminary Information
TDA4455
TELEFUNKEN Semiconductors
Electrical Characteristics
Vs = 8 V, T
= 25°C, reference point Pin 5, unless otherwise specified
amb
Parameters
DC-supply
Supply voltage
Supply current
Test Conditions / Pins
Pin 15
Symbol
Min.
6.8
Typ.
Max.
Unit
V
s
8.0
50
13.0
60
V
mA
I
s
IF-amplifier
Pins 1–2 or Pins 17–18
sync peak value, B/G
Input sensitivity
Input impedance
Input capacitance
IF-AGC
V
R
C
80
1.2
2
120
µV
eff
k
pF
in
in
in
Pins 6 and 8
IF gain control range
Response time, standard L
AGC capacitor
Average capacitor
Tuner-AGC
G
60
66
dB
µsec
µF
v
Note 1
t
10
AGC
C
C
4,7
68
6
nF
8
Pins 3 and 4
Available tuner-AGC
current
Automatic turn over point
PLL
I
4
mA
dB
4
G
65
v,tun
Pins 9–10, 12, 13
see note 2
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
f
f
f /
±1.5
3.0
4.5
MHz
MHz
kHz/mV
cap
vco
u
3.0
Pin 7
Note 4
see note 3
V
out
1.8
1.2
2.0
1.4
2.2
1.6
10
V
pp
V
pp
Note 5
V
out
Standard B/G and L
Zero carrier level
V
%
out
Ultra white level,
standard B/G
V
4.2
V
7
Ultra black level, Stand. L Zero carrier level
V
V/
1.9
0.5
V
%/V
7
Supply voltage influence
on the ultra black level
(B /G)
V
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
V/
B
0.5
%/V
V
12
52
MHz
dB
B
2.0
G
3
3
%
deg
Video demodulator output
Pin 7
Sound chroma beat
(1.07 MHz intermodu-
lation) related to demodu-
lated auxiliary colour
carrier.
Picture carrier = 0 dB
Colour carrier = –6 dB
Sound carrier = –24 dB
a
IM
dB
4 (12)
Rev. A1: 08.05.1995
Preliminary Information
TDA4455
TELEFUNKEN Semiconductors
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
IF residual voltage
f = 38.9 MHz
f = 77.8 MHz
V
2
5
mV
mV
res1
V
res2
Upsetting factor of sync
pulse in the AGC range
Vsync
Vsync
3
%
Tilt of half picture
Standard L
5
10
%
between black and white
Ultra black limiting
threshold
Ultra white limiting
threshold
Below sync level
Above ultra white level
V
V
250
500
mV
mV
lim1
lim2
Standard switch
Control voltage B/G
Control voltage L
Pin 11
Note 6
V
sw1
V
sw2
V
sw3
2.5
0
5.0
4.0
1.5
V
V
V
Control voltage D2MAC
Input selector switch
Control voltage – input 1
active
Control voltage – input 2
active
V
s
Pin 16
Note 7
5.0
0
V
S
V
V
2.5
Notes
Alignment of the VCO
1. Apply 4.5 V to Pin 6, to disable the broadband
amplifier.
1. A peak white value for at least 10 µs must be trans-
mitted for each complete frame
2. Measure the dc-voltage at Pin 12 (phase detector).
2. Loop filter: R1 = 500 – 1 k, C1 = 0.47 F
Capacitor VCO circuit: C
= 27 – 47 pF
VCO
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.
3. Pin 7 unloaded
4. Residual carrier: 10% carrier amplitude
5. Blanking level: 30% carrier amplitude
4. Adjust the VCO circuit until at Pin 12 is the same DC-
voltage as measured in step 2.
6. Without control voltage at Pin 11 – standard B/G is
automatically selected
7. Without control voltage at Pin 16 – input 1 is auto-
matically active
Rev. A1: 08.05.1995
5 (12)
Preliminary Information
TDA4455
TELEFUNKEN Semiconductors
Pin Related Internal Circuits (Continued)
1.2 k
1.2 k
1, 17
2, 18
3 k
3 k
93 7675
Figure 1. Pin 1–2, Pin 17–18
93 7676
93 7678
50
3 k
2 k
3
6
Figure 2. Pin 3
Figure 4. Pin 6
93 7677
7
4
93 7879
Figure 3. Pin 4
Figure 5. Pin 7
6 (12)
Rev. A1: 08.05.1995
Preliminary Information
TDA4455
TELEFUNKEN Semiconductors
Pin Related Internal Circuits (Continued)
12 k
2.7 V
1 k
12 k
8
7 k
12
93 7683
Figure 9. Pin 12
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
12.5
300
11
16
Figure 8. Pin 11
Figure 11. Pin 16
Rev. A1: 08.05.1995
7 (12)
Preliminary Information
TDA4455
TELEFUNKEN Semiconductors
IF-AGC, Switching Thresholds
93 7645
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 Average discharge threshold
2.0 V Sync. peak level :
6 % carrier
1.9 V Ultra black level: zero carrier
Figure 13. L-standard (pos. modulated)
93 7647
4.2 V DC value: zero carrier
4.1 V Average discharge threshold
4.0 V
White level: 10 % carrier
Dig.:
Sound
Analog:
Luminance Signal
Analog:
Chrominance
+Sync.
Diff.: Signal
2.0 V Black level: 100 % carrier
(charge threshold)
Figure 14. D2MAC-standard (neg. modulated)
8 (12)
Rev. A1: 08.05.1995
Preliminary Information
TDA4455
TELEFUNKEN Semiconductors
Test Circuit
Rev. A1: 08.05.1995
9 (12)
Preliminary Information
TDA4455
TELEFUNKEN Semiconductors
Application Circuit
10 (12)
Rev. A1: 08.05.1995
Preliminary Information
TDA4455
TELEFUNKEN Semiconductors
Dimensions in mm
Package: DIP 16
94 9128
Rev. A1: 08.05.1995
11 (12)
Preliminary Information
TDA4455
TELEFUNKEN Semiconductors
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
12 (12)
Rev. A1: 08.05.1995
Preliminary Information
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