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