PHILIPS TDA3853T

INTEGRATED CIRCUITS
DATA SHEET
TDA3853T
TV IF amplifier and demodulator
with TV-identification
Preliminary specification
File under Integrated Circuits, IC02
January 1992
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
TDA3853T
FEATURES
• Video off switch
• Suitable for standards B/G (I, M, N, DK), see Table 1
• Sound trap buffer amplifier
• Gain controlled 3-stage IF amplifier with typically
80 MHz bandwidth
• Tracking generator (AFT output) with Q-demodulator
and internal 90 degree phase shifter for tracking the
reference circuit
• High performance synchronous demodulator for
negative and positive video modulation; passive
regeneration of the reference signal
• Low supply voltage 5 V, low power consumption
• Peak-sync-related AGC
GENERAL DESCRIPTION
• AGC output voltage take over point adjustable
Monolithic integrated circuit for vision IF signal processing
in TV and VTR sets.
• High sensitive TV identification based on vertical pulse
duty cycle recognition; IDENT output
QUICK REFERENCE DATA
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
VP
supply voltage
4.75
5
6
V
IP
supply current
−
46
−
mA
Vi
vision IF input signal sensitivity (RMS value, pins 1-20)
−
70
100
µV
maximum vision IF input signal (RMS value, pins 1-20)
100
−
−
mV
Gv
IF gain control range
63
66
−
dB
Vo CVBS
buffered CVBS output signal on pin 12 (peak-to-peak value)
1.7
2
2.3
V
B
−3 dB video bandwidth (pin 12)
−
14
−
MHz
S/N
signal-to-noise ratio for video
55
60
−
dB
α1.1
intermodulation attenuation at yellow
53
56
−
dB
60
−
−
dB
α3.3
αspur
suppression of spurious harmonics of video signal
22
26
−
dB
Tamb
operating ambient temperature
0
−
70
°C
ORDERING INFORMATION
PACKAGE
EXTENDED
TYPE NUMBER
TDA3853T
PINS
20
PIN POSITION
mini-pack
plastic
Note
1. SOT163-1; 1997 January 8.
January 1992
MATERIAL
2
CODE
SOT163A
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
TDA3853T
Fig.1 Block diagram.
January 1992
3
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
TDA3853T
PINNING
SYMBOL
PIN
DESCRIPTION
Vi a
1
balanced vision IF input a
TOP
2
tuner AGC take over adjustment point (TOP)
CBL
3
capacitor for black level
n.c.
4
not connected
VIDOFF
5
video off input, identification capacitor
IDENT
6
TV identification output
TRSW
7
set input for tracking switch, tracking hold capacitor
AFT
8
automatic frequency tracking output
n.c.
9
not connected
RES1
10
resonance reference circuit for vision carrier
RES2
11
resonance reference circuit for vision carrier
CVBS
12
CVBS output (positive)
TRAP
13
video buffer amplifier input from sound trap
VIDEO
14
video and sound intercarrier output
VP
15
+5 V supply voltage
Cstab
16
decoupling capacitor for voltage stabilizer
GND
17
ground (0 V)
CAGC
18
capacitor for AGC
AGC
19
AGC output to tuner
Vi b
20
balanced vision IF input b
FUNCTIONAL DESCRIPTION
The TDA3853T is a TV IF
amplifier/demodulator for negative
modulation.
The IF input signal is amplified,
gain-controlled and demodulated
(Fig.1).
Vision IF amplifier and
demodulator
The vision IF amplifier consists of
three AC-coupled differential
amplifiers. Gain control is achieved by
current divider stages. Emitter
feedback resistors in the differential
amplifiers are optimized with respect
to noise and signal capability.
Synchronous demodulator
The demodulator has a reference
amplifier consisting of a differential
January 1992
Fig.2 Pin configuration.
amplifier with resistive load to provide
passive vision carrier regeneration.
This allows capacitive coupling of the
resonance circuit to obtain a notch
filter characteristic and tracking of the
resonance circuit.
A cascaded limiter amplifier follows
the reference amplifier to eliminate
amplitude modulation. The limited IF
reference signal is fed to the
demodulator. The unlimited IF signal
is fed via a phase correction network
to the demodulator. The video
amplifier is an operational amplifier
with a wide bandwidth and internal
feedback. The video and sound
intercarrier signal is output on pin 14.
Video buffer amplifier
This operational amplifier has a wide
bandwidth with internal feedback and
frequency compensation. Gain and
input impedance are adapted to
4
operate with a ceramic sound trap.
The switching functions are described
in Table 1.
AGC detector and IF gain control
The video signal is fed through
low-pass filters to attenuate the sound
carriers and then is fed to the AGC
detector.
Peak-sync AGC detection.
A special network provides current
pulses to fast charge the AGC
capacitor on pin 18 (gain reduction).
This achieves a minimum of video
distortion.
The AGC control converts the AGC
capacitor voltage to three separate
voltages to control the IF stages.
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
TDA3853T
Sync pulse separator
The sync pulse separator separates
the composite sync signal to gate the
AFT. The vertical sync is used for
identification. The input is
band-limited to obtain a higher ident
sensitivity.
Table 1
Switching functions of TDA3853T.
VIDOFF
PIN 5
TRSW
PIN 7
VIDEO
SIGNAL
IDENT
PIN 6
pin
L
L(1)
video OFF
0.5 mA sink
setting
2.2 µF
L(1)
video ON
H or 0.5 mA sink
Note
1.
capacitor on pin 7 means tracking active; LOW means tracking inactive
Tuner AGC
Tracking generator (AFT)
The tuner AGC output current is fed to
the open-collector output on pin 19.
The take-over point is adjusted
externally at pin 2 to adapt the tuner
and SAW filter to an optimum IF input
level. The IF gain variation over the
full tuner gain range (slip) is
minimized to ensure a constant tuner
output signal.
A limited 90 degree phase-shifted
vision carrier signal is fed to the AFT
quadrature demodulator, internal RC
networks provide active phase
shifting. The linear IF signal is applied
to the other AFT quadrature
demodulator input. The AFT output
signal is applied to a gating stage.
Gating with the composite sync
pulses activates the AFT
demodulator. Therefore the AFT
output is free from video modulation.
The AFT capacitor (pin 7) is charged
by the gated AFT current. The
capacitor voltage is converted to an
DC output current on pin 9
(open-collector sink/source currents).
Identification
An analog integrating network
followed by a window comparator
identifies the video signal by detection
of the duty cycle of the vertical sync
pulses. The pulses charge the
identification capacitor on pin 5.
January 1992
5
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
TDA3853T
LIMITING VALUES
In accordance with the Absolute Maximum System (IEC 134).
SYMBOL
PARAMETER
MIN.
MAX.
UNIT
VP
supply voltage
0
6.0
V
IP
supply current on pin 15
−
55
mA
Vn
voltage on pins 6, 8 and 12
−0.3
VP
V
V5,7
voltage on pins 5 and 7
−0.3
5.5
V
V13
voltage on pin 13
−0.3
5.0
V
V14
voltage on pin 14
−0.3
4.2
V
V19
voltage on pin 19
−0.3
13.2
V
I2,16
current on pins 2 and 16
−
−200
µA
I5,6
current on pins 5 and 6
−
−60
µA
I7
current on pin 7
−
−100
µA
I8
current on pin 8
−
−50
µA
I12
current on pin 12
−
−10
mA
I14
current on pin 14
−
−3
mA
Tstg
storage temperature range
−25
+150
°C
Tamb
operating ambient temperature range
0
+70
°C
VESD
handling(1)
−
±300
V
electrostatic
for all
pins(2)
Notes
1. Equivalent to discharging a 200 pF capacitor through a 0 Ω series resistor.
2. Pins 1, 10, 11 and 20 have special protection, the other pins have standard protection by diodes to VP and GND
(this excludes pins 15 (VP) and 19 (tuner AGC output) which have standard protection to GND only).
January 1992
6
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
TDA3853T
CHARACTERISTICS
VP = 5 V; Tamb = 25 °C, fVC = 38.9 MHz; ViIF = 10 mV rms; DSB video modulation; sync level for B/G.
Measurements taken in Fig.3 without notch components and video signal according to Fig.4 unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VP
supply voltage range (pin 15)
4.75
5
6
V
IP
supply current
−
46
55
mA
0
−
0.8
V
Standard set inputs (Table 1)
VIL
input voltage LOW, pins 5 and 7
Vision IF input (pins 1-20)
input signal sensitivity (RMS value)
−1 dB video
−
70
100
µV
maximum input signal (RMS value)
+1 dB video; note 1
100
−
−
mV
Gv
IF gain control range
Fig.6
63
66
−
dB
B
IF bandwidth
−3 dB
−
80
−
MHz
Ri
input resistance
−
2
−
kΩ
Ci
input capacitance
−
1.5
−
pF
VI
DC voltage on pins 1 and 20
−
2.50
−
V
Vi
Synchronous demodulator (pins 10 and 11)
Vo ref
picture carrier amplitude, pins 10-11
(peak-to-peak value)
−
1.6
−
V
R10-11
integrated operating resistance
−
12
−
kΩ
RL 10-11
load resistance
tbn
−
−
kΩ
QL
load Q-factor of resonance circuit; note 2
V10, 11
DC voltage
60
−
−
2.8
−
no notch components 55
V
Composite video output (pin 14)
Vo
output signal (peak-to-peak value)
0.9
1.0
1.1
V
V14
sync level
−
1.5
−
V
ultra-white level
−
2.63
−
V
upper video clipping level
−
4.3
−
V
lower video clipping level
−
0.3
−
V
R14
output resistance
−
−
10
Ω
I14
output current
DC and AC
−
−
±1
mA
B
RR
−1 dB video bandwidth
C14 < 20 pF
tbn
10
−
MHz
−3 dB video bandwidth
C14 < 20 pF
tbn
14
−
MHz
ripple rejection on pin 14
fripple = 70 Hz; note 3
tbn
30
−
dB
January 1992
7
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
SYMBOL
TDA3853T
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
CVBS buffer amplifier (pins 12 and 13)
R13
input resistance
−
3.3
−
kΩ
C13
input capacitance
−
2
−
pF
Vo CVBS
typical CVBS output signal on pin 14
(peak-to-peak value)
note 4
−
2
−
V
CVBS output level
upper video clipping
−
4.25
−
V
lower video clipping
−
0.3
−
V
sync level
−
1.35
−
V
DC and AC
−
−
±1
mA
−
−
10
Ω
I12
output current
R12
output resistance
Gv
voltage gain
note 4
6.5
7
7.5
dB
B
−3 dB video bandwidth
C14 < 20 pF
tbn
14
−
MHz
RR
ripple rejection on pin 12
fripple = 70 Hz; note 3
tbn
35
−
dB
Measurements from IF input to CVBS output (pin 12)
Vo CVBS
typical CVBS output signal on pin 12
(peak-to-peak value)
Fig.10
1.7
2
2.3
V
∆Vo
deviation of CVBS output signal at B/G
50 dB gain control
−
−
0.5
dB
30 dB gain control
−
0.1
−
dB
2
5
%
∆G
differential gain
10 to 90% modulation −
10 to 90% modulation −
∆ϕ
differential phase
tiltH
horizontal tilt
B
−2 dB video bandwidth
CL < 20 pF
2
5
o
−
0.7
1.5
%
tbn
12
−
MHz
S/N
signal-to-noise ratio
note 5; Fig.5
−
58
−
dB
α1.1
intermodulation at “blue”, note 6
f = 1.1 MHz; Fig.8
56
58
−
dB
intermodulation at “yellow”
f = 1.1 MHz
53
56
−
dB
intermodulation at “blue”
f = 3.3 MHz
62
−
−
dB
intermodulation at “yellow”
f = 3.3 MHz
60
−
−
dB
residual vision carrier (RMS value)
fundamental wave
−
1
10
mV
α3.3
α1H
second harmonic
−
1
10
mV
αspur
suppression of spurious video signal
harmonics
transformer; Fig.4
22
26
−
dB
RR
ripple rejection on pin 12
fripple = 70 Hz; note 3
tbn
30
−
dB
response to an increasing amplitude step
of 50 dB in input signal
−
1
10
ms
response to a decreasing amplitude step
of 50 dB in input signal
−
150
300
ms
α2H
AGC detector (pin 18)
Tresp
V18
gain control voltage on capacitor
1.5
−
4
V
I18
peak charging current (peak value)
−
−2
−
mA
charging current
−
−0.5
−
mA
discharging current
−
11
−
µA
January 1992
full gain range
8
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
SYMBOL
TDA3853T
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Tuner AGC (pin 19)
IF input signal for minimum starting point
of tuner take over (RMS value)
input at pins
1-20
−
−
1
mV
IF input signal for maximum starting point
of tuner take over (RMS value)
input at pins
1-20
50
−
−
mV
∆GIF
IF gain variation
maximum ∆IAGC
= 1 mA
−
3
6
dB
V19
permitted output voltage
from external
−
−
13.2
V
saturation voltage
I19 = 1 mA
−
0.2
0.5
V
∆V19
variation of take over point by temperature ∆T = 60 °C
−
2
3
dB
I19
sink current
no tuner gain
reduction; Fig.7
−
0
0.1
µA
maximum tuner gain
reduction
1.5
1.8
2.0
mA
fripple = 70 Hz; note 3
tbn
20
−
dB
Vi
RR
ripple rejecting on pin 19
TV identification and black level detector (pins 5, 6 and 3)
Vi
IF input signal on pins 1-20
(RMS value)
TV identified
−
50
−
µV
C/N
carrier-to-noise ratio at IF input
TV identified; note 7
−
10
−
dB
V14
minimum sync amplitude in relation to
typical sync
identification on
−
30
−
%
V6
output voltage for TV identified
4.5
4.95
VP
V
0.4
V
output voltage for TV not identified
I7 = 500 µA
−
0.1
output current (sink)
no ident
−
500
−
µA
allowed leakage current (source)
ident
−
−
−1
µA
V5
voltage for “identification on”
2.2 µF capacitor on
pin 5
−
2.6
−
V
Ileak
permitted leakage current (capacitor pin 5)
−
−
3
µA
tp V
vertical pulse duty cycle for TV identified
4
8
25
10−3
I6
tsync/tvertical
Tracking generator, AFT (pins 7 and 8)
note 8
V8
note 9; Fig.9
I8
4.3
−
4.7
V
minimum output voltage
0.3
−
0.7
V
permitted output voltage
−
−
VP
V
sink output current
160
180
220
µA
source output current
−160
−180
−220
µA
offset output current
−
−
±20
µA
maximum output voltage
S
control steepness
∆Ig/∆f; note 9
−
2
−
µA/kHz
∆ϕ
phase offset spread for 38.9 MHz
note 10
−
−
±4
o
V7
input voltage for TRSW
tracking off; Table 1
0
−
0.8
V
(independent of other mode switches)
tracking on
open-circuit
January 1992
9
V
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
TDA3853T
Notes to the characteristics
1. Video signal is still gain controlled with 2 V (p-p) on output; but intermodulation figures are lowered.
2. AFT characteristic depends on Q-factor.
3. Ripple rejection for f = 50 to 100 Hz.
4. The 7 dB buffer gain accounts for 1 dB loss in the sound trap. Buffer output signal is typical 2 V (p-p).
When no sound trap is applied, a 330 Ω resistor must be connected from output to input (from pin 14 to pin 13).
5. S/N is the ratio of the black-to-white amplitude (pin 12) and the RMS value of noise (black, pin 12). B = 5 MHz
weighted in accordance with CCIR-567 at a source impedance of 50 Ω.
6. α1.1 = 20 log (Vo at 4.4 MHz / Vo at 1.1 MHz) + 3.6 dB; α1.1 value at 1.1 MHz related to black/white signal.
α3.3 = 20 log (Vo at 4.4 MHz / Vo at 3.3 MHz); α3.3 value at 3.3 MHz related to colour carrier.
7. The carrier-to-noise ratio at IF input for “TV identified” is defined as the ratio of carrier (top sync, RMS value) and
noise (RMS value). Conditions: 5 MHz bandwidth; ViIF = 10 mV RMS (top sync) and a video signal of
2T + 20T + white bar.
8. A current source output is provided to match the AFT output signal to the different tuning systems. The internal
90 degrees phase shifter is matched for fo = 38.9 MHz.
9. The AFT characteristic depends on QL of the resonance circuit (QL = 60, without notch components).
10. ±4° corresponds to ±23 kHz for QL as in Fig.1 (refer to note 9).
January 1992
10
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
Fig.3
TDA3853T
Test and application circuit. Test circuit without notch capacitors and with sound trap replaced by a 330 Ω
resistor. Dashed components for tracking application only; application circuit with SWIF.
January 1992
11
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
TDA3853T
Fig.4 Video test signals.
Fig.5 Signal-to-noise ratio (typical) as a function of IF input signal.
January 1992
12
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
TDA3853T
Fig.6 IF gain as a function of adjustment at pin 2.
Fig.7 Tuner AGC characteristic.
Fig.8 Input conditions for intermodulation measurements.
January 1992
13
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
TDA3853T
Fig.9 AFT characteristic.
Fig.10 Front end level diagram.
January 1992
14
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
Fig.11 Internal circuit.
TDA3853T
January 1992
15
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
TDA3853T
PACKAGE OUTLINE
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
D
E
A
X
c
HE
y
v M A
Z
11
20
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
L
1
10
e
bp
detail X
w M
0
5
10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
HE
L
Lp
Q
v
w
y
mm
2.65
0.30
0.10
2.45
2.25
0.25
0.49
0.36
0.32
0.23
13.0
12.6
7.6
7.4
1.27
10.65
10.00
1.4
1.1
0.4
1.1
1.0
0.25
0.25
0.1
0.9
0.4
0.012 0.096
0.004 0.089
0.01
0.019 0.013
0.014 0.009
0.51
0.49
0.30
0.29
0.050
0.42
0.39
0.055
0.043
0.016
0.043
0.039
0.01
0.01
0.004
0.035
0.016
inches
0.10
Z
(1)
θ
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT163-1
075E04
MS-013AC
January 1992
EIAJ
EUROPEAN
PROJECTION
ISSUE DATE
92-11-17
95-01-24
16
o
8
0o
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
TDA3853T
SOLDERING
Wave soldering
Introduction
Wave soldering techniques can be used for all SO
packages if the following conditions are observed:
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
• A double-wave (a turbulent wave with high upward
pressure followed by a smooth laminar wave) soldering
technique should be used.
• The longitudinal axis of the package footprint must be
parallel to the solder flow.
• The package footprint must incorporate solder thieves at
the downstream end.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our “IC Package Databook” (order code 9398 652 90011).
During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.
Reflow soldering
Reflow soldering techniques are suitable for all SO
packages.
Maximum permissible solder temperature is 260 °C, and
maximum duration of package immersion in solder is
10 seconds, if cooled to less than 150 °C within
6 seconds. Typical dwell time is 4 seconds at 250 °C.
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
Several techniques exist for reflowing; for example,
thermal conduction by heated belt. Dwell times vary
between 50 and 300 seconds depending on heating
method. Typical reflow temperatures range from
215 to 250 °C.
Repairing soldered joints
Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron
(less than 24 V) applied to the flat part of the lead. Contact
time must be limited to 10 seconds at up to 300 °C. When
using a dedicated tool, all other leads can be soldered in
one operation within 2 to 5 seconds between
270 and 320 °C.
Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45 °C.
January 1992
17
Philips Semiconductors
Preliminary specification
TV IF amplifier and demodulator with
TV-identification
TDA3853T
DEFINITIONS
Data sheet status
Objective specification
This data sheet contains target or goal specifications for product development.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Product specification
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
January 1992
18