Datasheet TDA3853T Datasheet (Philips)

INTEGRATED CIRCUITS

DATA SH EET

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

TDA3853T

TV-identification

FEATURES

• Suitable for standards B/G (I, M, N, DK), see Table 1

• Gain controlled 3-stage IF amplifier with typically

80 MHz bandwidth

• High performance synchronous demodulator for
negative and positive video modulation; passive
regeneration of the reference signal

• Peak-sync-related AGC

• AGC output voltage take over point adjustable

• High sensitive TV identification based on vertical pulse

duty cycle recognition; IDENT output

QUICK REFERENCE DATA

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

V

P

I

P

V

i

supply voltage 4.75 5 6 V
supply current − 46 − mA
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

G

v

V

o CVBS

IF gain control range 63 66 − dB

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

α

1.1

α

3.3

α

spur

T

amb

intermodulation attenuation at yellow 53 56 − dB

suppression of spurious harmonics of video signal 22 26 − dB

operating ambient temperature 0 − 70 °C

• Video off switch

• Sound trap buffer amplifier

• Tracking generator (AFT output) with Q-demodulator

and internal 90 degree phase shifter for tracking the
reference circuit

• Low supply voltage 5 V, low power consumption

GENERAL DESCRIPTION

Monolithic integrated circuit for vision IF signal processing
in TV and VTR sets.

60 −−dB

ORDERING INFORMATION

EXTENDED

TYPE NUMBER

PINS PIN POSITION MATERIAL CODE

PACKAGE

TDA3853T 20 mini-pack plastic SOT163A

Note

1. SOT163-1; 1997 January 8.

January 1992 2

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

PINNING

SYMBOL PIN DESCRIPTION

V

i a

TOP 2 tuner AGC take over adjustment point (TOP)
C

BL

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
V

P

C

stab

GND 17 ground (0 V)
C

AGC

AGC 19 AGC output to tuner
V

i b

1 balanced vision IF input a

3 capacitor for black level

15 +5 V supply voltage
16 decoupling capacitor for voltage stabilizer

18 capacitor for AGC

20 balanced vision IF input b

TDA3853T

Fig.2 Pin configuration.

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

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

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.

January 1992 4

Philips Semiconductors Preliminary specification

TV IF amplifier and demodulator with
TV-identification

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

pin L L
setting 2.2 µFL

Note

1. capacitor on pin 7 means tracking active; LOW means tracking inactive

Tuner AGC

Tracking generator (AFT)

(1)
(1)

TRSW

PIN 7

video OFF 0.5 mA sink
video ON H or 0.5 mA sink

VIDEO

SIGNAL

TDA3853T

IDENT

PIN 6

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.

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.

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).

January 1992 5

Philips Semiconductors Preliminary specification

TV IF amplifier and demodulator with

TDA3853T

TV-identification

LIMITING VALUES

In accordance with the Absolute Maximum System (IEC 134).

SYMBOL PARAMETER MIN. MAX. UNIT

V

P

I

P

V

n

V

5,7

V

13

V

14

V

19

I

2,16

I

5,6

I

7

I

8

I

12

I

14

T

stg

T

amb

V

ESD

supply voltage 0 6.0 V
supply current on pin 15 − 55 mA
voltage on pins 6, 8 and 12 −0.3 V

V

P

voltage on pins 5 and 7 −0.3 5.5 V
voltage on pin 13 −0.3 5.0 V
voltage on pin 14 −0.3 4.2 V
voltage on pin 19 −0.3 13.2 V
current on pins 2 and 16 −−200 µA
current on pins 5 and 6 −−60 µA
current on pin 7 −−100 µA
current on pin 8 −−50 µA
current on pin 12 −−10 mA
current on pin 14 −−3mA
storage temperature range −25 +150 °C
operating ambient temperature range 0 +70 °C
electrostatic handling

(1)

for all pins

(2)

−±300 V

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 V
(this excludes pins 15 (VP) and 19 (tuner AGC output) which have standard protection to GND only).

and GND

P

January 1992 6

Philips Semiconductors Preliminary specification

TV IF amplifier and demodulator with

TDA3853T

TV-identification

CHARACTERISTICS

= 5 V; T

V

P

Measurements taken in Fig.3 without notch components and video signal according to Fig.4 unless otherwise specified.

SYMBOL P ARAMETER CONDITIONS MIN. TYP . MAX. UNIT

V

P

I

P

Standard set inputs (Table 1)

V

IL

Vision IF input (pins 1-20)

V

i

G

v

B IF bandwidth −3dB − 80 − MHz
R

i

C

i

V

I

Synchronous demodulator (pins 10 and 11)

V

o ref

R

10-11

R

L 10-11

Q

L

V

10, 11

Composite video output (pin 14)

V

o

V

14

R

14

I

14

B −1 dB video bandwidth C

RR ripple rejection on pin 14 f

= 25 °C, fVC = 38.9 MHz; V

amb

= 10 mV rms; DSB video modulation; sync level for B/G.

iIF

supply voltage range (pin 15) 4.75 5 6 V
supply current − 46 55 mA

input voltage LOW, pins 5 and 7 0 − 0.8 V

input signal sensitivity (RMS value) −1 dB video − 70 100 µV
maximum input signal (RMS value) +1 dB video; note 1 100 −−mV
IF gain control range Fig.6 63 66 − dB

input resistance − 2 − kΩ
input capacitance − 1.5 − pF
DC voltage on pins 1 and 20 − 2.50 − V

picture carrier amplitude, pins 10-11

− 1.6 − V

(peak-to-peak value)
integrated operating resistance − 12 − kΩ
load resistance tbn −−kΩ
load Q-factor of resonance circuit; note 2 no notch components 55 60 −
DC voltage − 2.8 − V

output signal (peak-to-peak value) 0.9 1.0 1.1 V
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
output resistance −− 10 Ω
output current DC and AC −− ±1mA

< 20 pF tbn 10 − MHz

14

−3 dB video bandwidth C

< 20 pF tbn 14 − MHz

14

= 70 Hz; note 3 tbn 30 − dB

ripple

January 1992 7

Philips Semiconductors Preliminary specification

TV IF amplifier and demodulator with

TDA3853T

TV-identification

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

CVBS buffer amplifier (pins 12 and 13)

R

13

C

13

V

o CVBS

I

12

R

12

G

v

B −3 dB video bandwidth C
RR ripple rejection on pin 12 f

Measurements from IF input to CVBS output (pin 12)

V

o CVBS

∆V

o

∆G differential gain 10 to 90% modulation − 25%
∆ϕ differential phase 10 to 90% modulation − 25

tilt

H

B −2 dB video bandwidth C
S/N signal-to-noise ratio note 5; Fig.5 − 58 − dB

α

1.1

α

3.3

α

1H

α

2H

α

spur

RR ripple rejection on pin 12 f

AGC detector (pin 18)

T

resp

V

18

I

18

input resistance − 3.3 − kΩ
input capacitance − 2 − pF
typical CVBS output signal on pin 14

note 4 − 2 − V

(peak-to-peak value)
CVBS output level upper video clipping − 4.25 − V

lower video clipping − 0.3 − V

sync level − 1.35 − V
output current DC and AC −− ±1mA
output resistance −− 10 Ω
voltage gain note 4 6.5 7 7.5 dB

< 20 pF tbn 14 − MHz

14

= 70 Hz; note 3 tbn 35 − dB

ripple

typical CVBS output signal on pin 12

Fig.10 1.7 2 2.3 V
(peak-to-peak value)

deviation of CVBS output signal at B/G 50 dB gain control −− 0.5 dB

30 dB gain control − 0.1 − dB

o

horizontal tilt − 0.7 1.5 %

< 20 pF tbn 12 − MHz

L

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 − 110mV

second harmonic − 110mV
suppression of spurious video signal

transformer; Fig.4 22 26 − dB
harmonics

= 70 Hz; note 3 tbn 30 − dB

ripple

response to an increasing amplitude step

− 110ms

of 50 dB in input signal
response to a decreasing amplitude step

− 150 300 ms

of 50 dB in input signal
gain control voltage on capacitor full gain range 1.5 − 4V
peak charging current (peak value) −−2− mA
charging current −−0.5 − mA
discharging current − 11 −µA

January 1992 8

Philips Semiconductors Preliminary specification

TV IF amplifier and demodulator with

TDA3853T

TV-identification

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Tuner AGC (pin 19)

V

i

IF input signal for minimum starting point
of tuner take over (RMS value)

IF input signal for maximum starting point
of tuner take over (RMS value)

∆G

IF

V

19

IF gain variation maximum ∆I

permitted output voltage from external −− 13.2 V
saturation voltage I

∆V

19

I

19

variation of take over point by temperature ∆T = 60 °C − 23dB
sink current no tuner gain

RR ripple rejecting on pin 19 f

TV identification and black level detector (pins 5, 6 and 3)

V

i

IF input signal on pins 1-20
(RMS value)

C/N carrier-to-noise ratio at IF input TV identified; note 7 − 10 − dB
V

14

minimum sync amplitude in relation to
typical sync

V

6

output voltage for TV identified 4.5 4.95 V
output voltage for TV not identified I

I

6

output current (sink) no ident − 500 −µA
allowed leakage current (source) ident −− −1 µA

V

5

I

leak

t

p V

voltage for “identification on” 2.2 µF capacitor on

permitted leakage current (capacitor pin 5) −− 3 µA
vertical pulse duty cycle for TV identified t

Tracking generator, AFT (pins 7 and 8)

V

8

maximum output voltage note 9; Fig.9 4.3 − 4.7 V
minimum output voltage 0.3 − 0.7 V
permitted output voltage −− V

I

8

sink output current 160 180 220 µA
source output current −160 −180 −220 µA
offset output current −− ±20 µA

S control steepness ∆I
∆ϕ phase offset spread for 38.9 MHz note 10 −− ±4
V

7

input voltage for TRSW tracking off; Table 1 0 − 0.8 V
(independent of other mode switches) tracking on open-circuit V

input at pins

−− 1mV

1-20

input at pins

50 −−mV

1-20

AGC

− 36dB

=1mA

= 1 mA − 0.2 0.5 V

19

− 0 0.1 µA

reduction; Fig.7

maximum tuner gain

1.5 1.8 2.0 mA

reduction

= 70 Hz; note 3 tbn 20 − dB

ripple

TV identified − 50 −µV

identification on − 30 − %

P

= 500 µA − 0.1 0.4 V

7

V

− 2.6 − V

pin 5

sync/tvertical

4 8 25 10

−3

note 8

P

/∆f; note 9 − 2 −µA/kHz

g

V

o

January 1992 9

Philips Semiconductors Preliminary specification

TV IF amplifier and demodulator with

TDA3853T

TV-identification

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. α

7. The carrier-to-noise ratio at IF input for “TV identified” is defined as the ratio of carrier (top sync, RMS value) and

8. A current source output is provided to match the AFT output signal to the different tuning systems. The internal

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).

= 20 log (Vo at 4.4 MHz / Vo at 1.1 MHz) + 3.6 dB; α

1.1

α

= 20 log (Vo at 4.4 MHz / Vo at 3.3 MHz); α

3.3

noise (RMS value). Conditions: 5 MHz bandwidth; V
2T + 20T + white bar.

90 degrees phase shifter is matched for fo = 38.9 MHz.

value at 3.3 MHz related to colour carrier.

3.3

iIF

value at 1.1 MHz related to black/white signal.

1.1

= 10 mV RMS (top sync) and a video signal of

January 1992 10

Philips Semiconductors Preliminary specification

TV IF amplifier and demodulator with
TV-identification

TDA3853T

Fig.3 Test and application circuit. Test circuit without notch capacitors and with sound trap replaced by a 330Ω

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

Fig.9 AFT characteristic.

TDA3853T

Fig.10 Front end level diagram.

January 1992 14

Philips Semiconductors Preliminary specification

TV IF amplifier and demodulator with
TV-identification

TDA3853T

January 1992 15

Fig.11 Internal circuit.

Philips Semiconductors Preliminary specification

TV IF amplifier and demodulator with
TV-identification

PACKAGE OUTLINE

SO20: plastic small outline package; 20 leads; body width 7.5 mm

D

c

y

Z

20

11

TDA3853T

SOT163-1

E

H

E

A

X

v M

A

pin 1 index

1

e

0 5 10 mm

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

mm

A

max.

2.65

0.10

A

1

0.30

0.10

0.012

0.004

A2A

2.45

2.25

0.096

0.089

0.25

0.01

b

0.49

0.36

p

cD

0.32

0.23

0.013

0.009

3

0.019

0.014

UNIT

inches

Note

1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.

10

w M

b

p

scale

(1)E(1) (1)

13.0

12.6

0.51

0.49

eHELLpQ

7.6

1.27

7.4

0.30

0.050

0.29

10.65

10.00

0.42

0.39

Q

A

2

A

1

1.4

0.055

1.1

0.4

0.043

0.016

detail X

1.1

1.0

0.043

0.039

(A )

L

p

L

0.25

0.01

A

3

θ

0.25 0.1

0.01

ywv θ

Z

0.9

0.4

8

0.004

0.035

0.016

0

o
o

OUTLINE
VERSION

SOT163-1

IEC JEDEC EIAJ

075E04 MS-013AC

REFERENCES

January 1992 16

EUROPEAN

PROJECTION

ISSUE DATE

92-11-17
95-01-24

Philips Semiconductors Preliminary specification

TV IF amplifier and demodulator with
TV-identification

SOLDERING
Introduction

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.

This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in

“IC Package Databook”

our

Reflow soldering

Reflow soldering techniques are suitable for all SO
packages.

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.

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.

Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45 °C.

(order code 9398 652 90011).

TDA3853T

Wave soldering

Wave soldering techniques can be used for all SO
packages if the following conditions are observed:

• 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.

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.

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.

A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.

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.

January 1992 17

Philips Semiconductors Preliminary specification

TV IF amplifier and demodulator with

TDA3853T

TV-identification

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