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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
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 VP IP Vi Gv Vo CVBS B S/N 1.1 3.3 spur Tamb suppression of spurious harmonics of video signal operating ambient temperature supply voltage supply current vision IF input signal sensitivity (RMS value, pins 1-20) maximum vision IF input signal (RMS value, pins 1-20) IF gain control range buffered CVBS output signal on pin 12 (peak-to-peak value) -3 dB video bandwidth (pin 12) signal-to-noise ratio for video intermodulation attenuation at yellow PARAMETER - - 100 63 1.7 - 55 53 60 22 0 MIN. 4.75 5 46 70 - 66 2 14 60 56 - 26 - TYP. · Video off switch · Sound trap buffer amplifier

TDA3853T

· 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.

MAX. 6 - 100 - - 2.3 - - - - - 70 V

UNIT mA µV mV dB V MHz dB dB dB dB °C

ORDERING INFORMATION EXTENDED TYPE NUMBER TDA3853T Note 1. SOT163-1; 1997 January 8. PACKAGE PINS 20 PIN POSITION mini-pack MATERIAL plastic CODE SOT163A

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Philips Semiconductors

Preliminary specification

TV IF amplifier and demodulator with TV-identification

TDA3853T

Fig.1 Block diagram.

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Philips Semiconductors

Preliminary specification

TV IF amplifier and demodulator with TV-identification
PINNING SYMBOL Vi a TOP CBL n.c. VIDOFF IDENT TRSW AFT n.c. RES1 RES2 CVBS TRAP VIDEO VP Cstab GND CAGC AGC Vi b PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DESCRIPTION balanced vision IF input a tuner AGC take over adjustment point (TOP) capacitor for black level not connected video off input, identification capacitor TV identification output set input for tracking switch, tracking hold capacitor automatic frequency tracking output not connected resonance reference circuit for vision carrier resonance reference circuit for vision carrier CVBS output (positive) video buffer amplifier input from sound trap video and sound intercarrier output +5 V supply voltage decoupling capacitor for voltage stabilizer ground (0 V) capacitor for AGC AGC output to tuner balanced vision IF input b 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

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 January 1992

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
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 setting Note 1. capacitor on pin 7 means tracking active; LOW means tracking inactive Tracking generator (AFT) 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). L 2.2 µF L(1) L(1) TRSW PIN 7 VIDEO SIGNAL video OFF video ON

TDA3853T

IDENT PIN 6 0.5 mA sink H or 0.5 mA sink

Tuner AGC 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.

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Philips Semiconductors

Preliminary specification

TV IF amplifier and demodulator with TV-identification
LIMITING VALUES In accordance with the Absolute Maximum System (IEC 134). SYMBOL VP IP Vn V5,7 V13 V14 V19 I2,16 I5,6 I7 I8 I12 I14 Tstg Tamb VESD Notes 1. Equivalent to discharging a 200 pF capacitor through a 0 series resistor. supply voltage supply current on pin 15 voltage on pins 6, 8 and 12 voltage on pins 5 and 7 voltage on pin 13 voltage on pin 14 voltage on pin 19 current on pins 2 and 16 current on pins 5 and 6 current on pin 7 current on pin 8 current on pin 12 current on pin 14 storage temperature range operating ambient temperature range electrostatic handling(1) for all pins(2) PARAMETER

TDA3853T

MIN. 0 - -0.3 -0.3 -0.3 -0.3 -0.3 - - - - - - -25 0 -

MAX. 6.0 55 VP 5.5 5.0 4.2 13.2 -200 -60 -100 -50 -10 -3 +150 +70 ±300

UNIT V mA V V V V V µA µA µA µA mA mA °C °C V

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).

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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 VP IP VIL Vi Gv B Ri Ci VI Vo ref R10-11 RL 10-11 QL V10, 11 Vo V14 PARAMETER supply voltage range (pin 15) supply current CONDITIONS MIN. 4.75 - 5 46 - TYP. 6 55 MAX. V mA UNIT

Standard set inputs (Table 1) input voltage LOW, pins 5 and 7 -1 dB video +1 dB video; note 1 Fig.6 -3 dB 0 - 100 63 - - - - - - tbn no notch components 55 - 0.8 V µV mV dB MHz k pF V

Vision IF input (pins 1-20) input signal sensitivity (RMS value) maximum input signal (RMS value) IF gain control range IF bandwidth input resistance input capacitance DC voltage on pins 1 and 20 70 - 66 80 2 1.5 2.50 100 - - - - - - - - - - - V

Synchronous demodulator (pins 10 and 11) picture carrier amplitude, pins 10-11 (peak-to-peak value) integrated operating resistance load resistance load Q-factor of resonance circuit; note 2 DC voltage 1.6 12 - 60 2.8 V k k

Composite video output (pin 14) output signal (peak-to-peak value) sync level ultra-white level upper video clipping level lower video clipping level R14 I14 B RR output resistance output current -1 dB video bandwidth -3 dB video bandwidth ripple rejection on pin 14 DC and AC C14 < 20 pF C14 < 20 pF fripple = 70 Hz; note 3 0.9 - - - - - - tbn tbn tbn 1.0 1.5 2.63 4.3 0.3 - - 10 14 30 1.1 - - - - 10 ±1 - - - V V V V V mA MHz MHz dB

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Philips Semiconductors

Preliminary specification

TV IF amplifier and demodulator with TV-identification
SYMBOL PARAMETER CONDITIONS MIN. - - note 4 upper video clipping lower video clipping sync level I12 R12 Gv B RR output current output resistance voltage gain -3 dB video bandwidth ripple rejection on pin 12 note 4 C14 < 20 pF fripple = 70 Hz; note 3 Fig.10 50 dB gain control 30 dB gain control G tiltH B S/N 1.1 3.3 1H 2H spur RR suppression of spurious video signal harmonics ripple rejection on pin 12 differential gain differential phase horizontal tilt -2 dB video bandwidth signal-to-noise ratio intermodulation at "blue", note 6 intermodulation at "yellow" intermodulation at "blue" intermodulation at "yellow" residual vision carrier (RMS value) CL < 20 pF note 5; Fig.5 f = 1.1 MHz; Fig.8 f = 1.1 MHz f = 3.3 MHz f = 3.3 MHz fundamental wave second harmonic transformer; Fig.4 fripple = 70 Hz; note 3 DC and AC - - - - - - 6.5 tbn tbn TYP.

TDA3853T

MAX. - - - - - - ±1 10 7.5 - -

UNIT

CVBS buffer amplifier (pins 12 and 13) R13 C13 Vo CVBS input resistance input capacitance typical CVBS output signal on pin 14 (peak-to-peak value) CVBS output level 3.3 2 2 4.25 0.3 1.35 - - 7 14 35 k pF V V V V mA dB MHz dB

Measurements from IF input to CVBS output (pin 12) Vo CVBS Vo typical CVBS output signal on pin 12 (peak-to-peak value) deviation of CVBS output signal at B/G 1.7 - - 2 - 0.1 2 2 0.7 12 58 58 56 - - 1 1 26 30 2.3 0.5 - 5 5 1.5 - - - - - - 10 10 - - V dB dB %
o

10 to 90% modulation - 10 to 90% modulation - - tbn - 56 53 62 60 - - 22 tbn - - full gain range 1.5 - - - 8

% MHz dB dB dB dB dB mV mV dB dB

AGC detector (pin 18) Tresp response to an increasing amplitude step of 50 dB in input signal response to a decreasing amplitude step of 50 dB in input signal V18 I18 gain control voltage on capacitor peak charging current (peak value) charging current discharging current January 1992 1 150 - -2 -0.5 11 10 300 4 - - - ms ms V mA mA µA

Philips Semiconductors

Preliminary specification

TV IF amplifier and demodulator with TV-identification
SYMBOL Tuner AGC (pin 19) Vi 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) GIF V19 V19 I19 IF gain variation permitted output voltage saturation voltage sink current input at pins 1-20 input at pins 1-20 maximum IAGC = 1 mA from external I19 = 1 mA no tuner gain reduction; Fig.7 maximum tuner gain reduction RR ripple rejecting on pin 19 fripple = 70 Hz; note 3 TV identified TV identified; note 7 identification on TV identification and black level detector (pins 5, 6 and 3) Vi C/N V14 V6 I6 V5 Ileak tp V V8 IF input signal on pins 1-20 (RMS value) carrier-to-noise ratio at IF input minimum sync amplitude in relation to typical sync output voltage for TV identified output voltage for TV not identified output current (sink) allowed leakage current (source) voltage for "identification on" permitted leakage current (capacitor pin 5) vertical pulse duty cycle for TV identified tsync/tvertical note 8 note 9; Fig.9 4.3 0.3 - 160 -160 - Ig/f; note 9 note 10 tracking off; Table 1 tracking on - - 0 - - - 180 -180 - 2 - - I7 = 500 µA no ident ident 2.2 µF capacitor on pin 5 - - - 4.5 - - - - - 4 50 10 30 4.95 0.1 500 - 2.6 - 8 - 50 - - - - - 1.5 tbn - - 3 - 0.2 2 0 1.8 20 PARAMETER CONDITIONS MIN. TYP.

TDA3853T

MAX.

UNIT

1 - 6 13.2 0.5 3 0.1 2.0 - - - - VP 0.4 - -1 - 3 25

mV mV dB V V dB µA mA dB µV dB % V V µA µA V µA 10-3

variation of take over point by temperature T = 60 °C

Tracking generator, AFT (pins 7 and 8) maximum output voltage minimum output voltage permitted output voltage I8 sink output current source output current offset output current S V7 control steepness phase offset spread for 38.9 MHz input voltage for TRSW (independent of other mode switches)

4.7 0.7 VP 220 -220 ±20 - ±4 0.8

V V V µA µA µA µA/kHz
o

V V

open-circuit

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Philips Semiconductors

Preliminary specification

TV IF amplifier and demodulator with TV-identification
Notes to the characteristics

TDA3853T

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 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 . 6. 1.1 = 20 log (Vo at 4.4 MHz / Vo at 1.1 MHz) + 3.6 dB; 1.1 value at 1.1 MHz related to black/white signal. 3.3 = 20 log (Vo at 4.4 MHz / Vo at 3.3 MHz); 3.3 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).

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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 330 resistor. Dashed components for tracking application only; application circuit with SWIF.

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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.

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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.

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Philips Semiconductors

Preliminary specification

TV IF amplifier and demodulator with TV-identification

TDA3853T

Fig.9 AFT characteristic.

Fig.10 Front end level diagram.

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Philips Semiconductors

Preliminary specification

TV IF amplifier and demodulator with TV-identification

TDA3853T

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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

TDA3853T

SOT163-1

D

E

A X

c y HE v M A

Z 20 11

Q A2 A1 pin 1 index Lp L 1 e bp 10 w M detail X (A 3) A

0

5 scale

10 mm

DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 2.65 0.10 A1 0.30 0.10 A2 2.45 2.25 A3 0.25 0.01 bp 0.49 0.36 c 0.32 0.23 D (1) 13.0 12.6 0.51 0.49 E (1) 7.6 7.4 0.30 0.29 e 1.27 0.050 HE 10.65 10.00 0.42 0.39 L 1.4 0.055 Lp 1.1 0.4 0.043 0.016 Q 1.1 1.0 0.043 0.039 v 0.25 0.01 w 0.25 0.01 y 0.1 0.004 Z
(1)



0.9 0.4 0.035 0.016

0.012 0.096 0.004 0.089

0.019 0.013 0.014 0.009

8 0o

o

Note 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. OUTLINE VERSION SOT163-1 REFERENCES IEC 075E04 JEDEC MS-013AC EIAJ EUROPEAN PROJECTION

ISSUE DATE 92-11-17 95-01-24

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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 our "IC Package Databook" (order code 9398 652 90011). 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. Wave soldering

TDA3853T

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.

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Philips Semiconductors

Preliminary specification

TV IF amplifier and demodulator with TV-identification
DEFINITIONS Data sheet status Objective specification Preliminary specification Product specification Limiting values

TDA3853T

This data sheet contains target or goal specifications for product development. This data sheet contains preliminary data; supplementary data may be published later. This data sheet contains final product specifications.

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.

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