View TDA4504B_1210942.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

d a t a sh eet product speci?cation file under integrated circuits, ic02 february 1992 integrated circuits TDA4504B small signal combination for multistandard colour tv
february 1992 2 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B features gain controlled vision if amplifier synchronous demodulator for negative and positive demodulation agc detector operating on peak sync amplitude for negative demodulation and on peak white level for positive demodulation tuner agc afc circuit with two control polarities and on/off-switch video preamplifier video switch to select either the internal video signal or an external video signal horizontal oscillator and synchronization circuit with two control loops vertical synchronization (divider system), ramp generator and driver with automatic amplitude adjustment for 50 and 60 hz transmitter identification (mute) sandcastle pulse generation vcr/auto vcr switch start-up circuit vertical guard general description having the capability to demodulate if signals with either positive or negative-going video information, the TDA4504B (fig.1) is contained within a 32 pin encapsulation. it includes a three-stage vision if amplifier, mute circuit, afc and agc circuitry, fully synchronised horizontal and vertical timebases with drive circuits and integral three-level sandcastle pulse generator. a functional colour tv receiver can thus be realized with the addition of a tuner, audio demodulator and amplifier, chroma decoder and respective line and field deflection circuitry. ordering information note 1. sot201-1; 1996 november 29 extended type number package pins pin position material code TDA4504B 32 dil plastic sot201 (1)
february 1992 3 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B fig.1 block diagram.
february 1992 4 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B quick reference data symbol parameter conditions min. typ. max. unit supply v 8 positive supply voltage pin 8 10 12 13.2 v i 8 supply current pin 8 90 115 140 ma i 12 start current pin 12 - 6.5 9 ma video v 9-10 if sensitivity (rms value) 25 40 65 m v g 9-10 if gain control range - 74 - db s/n signal to noise ratio v i input signal = 10 mv - 58 - db v 21 afc output voltage swing 10.5 - 11.5 v video output amplitude - 2 - v video switch 16 (p-p) internal video input - 2 - v v 13(p-p) external video input - 1 - v v 15(p-p) video output - 2.5 - v sync v 28 sync pulse input amplitude (p-p) 200 -- mv i 30 ?yback input current 0.1 - 2ma v 30 sandcastle output during burst key 8 -- v - during hor. blanking 4 4.4 5 v - during vert. blanking 2.1 3.3 3.7 v v 14 video transmitter identi?cation - no signal condition - 0.3 - v - 50 hz signal - 12 - v - 60 hz signal - 9 - v v 5 vert. feedback - dc voltage 2.9 3.3 3.7 v v 5(p-p) - ac voltage - 1 - v
february 1992 5 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B pinning pin description 1 black level internal video 2 agc take over (output) 3 vertical ramp generator (output) 4 vertical drive (output) 5 vertical feedback (input) 6 tuner agc (input) 7 ground 8 supply voltage 9 vision if (input) 10 vision if (input) 11 if agc (output) 12 start horizontal oscillator (output)/afc polarity switch (input) 13 external video (input) 14 mute/50 / 60 hz (output) 15 video switch (output) 16 internal video (input) 17 vcr switch (input) 18 video switch (input) 19 ground for some critical parts 20 video ampli?er (output) 21 afc (output) 22 afc s/h, afc switch (input) 23 vision demodulator tuned circuit 24 vision demodulator tuned circuit 25 coincidence detector/transmitter identi?cation 26 horizontal oscillator 27 phase 1 detector (output) 28 sync separator (input) 29 horizontal drive (output) 30 sandcastle output/horizontal ?yback (input) 31 phase 2 detector (output) 32 agc system switch (input)
february 1992 6 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B functional description vision if ampli?er, demodulator and video ampli?er each of the three ac-coupled if stages permit the omission of dc feedback and possess a control range in excess of 20 db. the if amplifier, which is completely symmetrical, is followed by a passive synchronous demodulator providing a regenerated carrier signal. this is limited by a logarithmic limiter circuit prior to its application to the demodulator. a noise clamp circuit is provided at the video input (pin 16) to limit interference pulses below the sync tip level and is more efficient than a noise inverter in providing improved picture stability during the presence of interference. the video amplifier has good linearity and bandwidth figures. afc-circuit obtaining the afc reference signal from the demodulator tuned circuit presents the advantage of utilizing a single tuned circuit and one adjustment. however, since the frequency spectrum of the signal applied to the demodulator is determined by the characteristic of the saw filter, the resultant asymmetrical spectrum with respect to the vision carrier causes the afc output voltage to be dependent upon the video signal. the TDA4504B thus contains a sample-and-hold circuit. with negative-going vision signals the afc is active only during the sync pulse period. when positive-going signals are applied to the device, however, the afc is continuously active but filtered to ensure only a small by-pass current is present in the sample-and-hold circuit. with weak input signals the drive signal will contain considerable noise which also possesses an asymmetrical frequency spectrum and could create an offset in the afc output voltage. the inclusion of a notch in the demodulator tuned circuit minimises this effect. the sample-and-hold circuit is followed by a high impedance output amplifier. thus the afc control gradient depends upon the load impedance. the afc polarity switch is combined with the start circuit (pin 12). it has a negative slope when pin 12 is open or connected to the main supply and a positive slope when pin 12 is grounded. the afc is disabled when the sample connection (pin 22) is grounded.
february 1992 7 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B agc circuit for signals employing negative modulation the agc detector operates on peak sync level but upon peak white content with those having positive modulation. selection is facilitated by the system switch (pin 32): the agc detector currents are: with a 6.8 m f agc capacitor, the video tilt will be < 10% for positively modulated signals and < 2% for negative modulation. to obtain a rapid agc action when executing a search tuning operation with the circuit set for peak white agc, the charge current is held at 55 m a until the detection of a transmitted signal. the transmitter identi?cation a mute signal is generated to disable the audio preamplifier of an audio demodulator during the absence of a transmission signal. when the video switch is in the internal mode, the identification of a transmitted signal is derived from the coincidence detector. in the external mode the if part of the circuit has its own identification system. the system relies upon the detection of sync. pulses on the incoming if signal. the separated horizontal sync pulse charges the capacitor on pin 25 which drives the mute output (pin 14). the connection of a 1 m w resistor between pin 25 and v cc results in the mute information being overruled by the 50/60 hz information derived from the internal vertical divider section (see 50/60 hz truth table). mute truth table: pin 32 high/open: positive modulation pin 32 low: negative modulation positive modulation negative modulation charge 1 m a55 m a discharge 3 ma 1.5 ma input signal pins 9 and 10 50 h z 60 h z none 50/60 hz 50/60 h z 50/60 h z none pin 25 9.5 v 9.5 v 0.3 v 9.5 v 9.5 v 9.5 v 0.3 v pin 28 50 hz 60 hz none 50 hz 60 hz none 50/60 hz pin 18 low low low/ high high high high high pin 14 12 v 9 v 0.3 v 12 v 9 v 12 v 0.3 v
february 1992 8 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B 50/60 hz information in the external video mode and with a resistor of 1 m w from pin 25 to v cc the mute is overruled by the 50/60 hz information from the divider system. 50/60 hz truth table: vcr switch flywheel horizontal synchronization is desirable when receiving weak signals marred by noise but is usually unnecessary when receiving stronger off-air signals unless certain types of interference or multipath reception are apparent. due to the inherent instability of vcr signals, however, the horizontal time constant should be shorter to prevent loss of horizontal synchronization in the early part of the scan. provision is therefore incorporated to automatically switch the short time constant such that a strong signal instigates the 'vcr' mode and a weak signal triggers the 'tv' mode. the connection of a switch to pin 17 provides for this to be accomplished manually and may take the form of an auxiliary switching function associated with a designated program selector button. the TDA4504B has a separate pin (pin 17) for the vcr switch: video-switch video output from the demodulator is filtered to remove the audio carrier and dc-coupled to pin 16. if ac-coupling is employed the internal noise clamp will operate on sync. tips. the TDA4504B provides the opportunity for a direct video connection (e.g. via a peritel connector) to be made to the device at pin 13. selection between internal and external video is made by applying a switching potential to pin 18. video switch: gain reduction to prevent crosstalk between the if stages and the horizontal oscillator when the device is operated in its external video mode with no rf input, the TDA4504B incorporates an option to reduce if gain by 20 db. this is accomplished by connecting a 39 k w resistor between pin 17 and ground. omission of this component results in the if amplifier remaining at full gain. in the internal video mode the resistor must be disconnected to achieve the auto-vcr mode. input signal 50 hz 60 hz none dont care dont care dont care pin 9/10 pin 25 9.5 9.5 0.3 9.5 9.5 9.5 pin 28 50 hz 60 hz none 50 hz 60 hz none pin 18 low low low high high high pin 14 12 9 0.3 12 9 12 pin 17 high: vcr mode fast time constant; ungated pin 17 n.c.: auto vcr mode pin 17 low: tv mode slow time constant; gated pin 18 low: internal video pin 18 high: external video
february 1992 9 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B horizontal synchronization the horizontal synchronization circuit of the TDA4504B has been designed as follows: the retrace of the horizontal oscillator occurs during the horizontal retrace and not during the scan period. this has the advantage that no interference will be visible on the screen when receiving weak input signals. video crosstalk will not disturb the phase of the horizontal locking. reduced frequency shift of the horizontal oscillator due to noise since the horizontal phase detector reference signal is more symmetrical and independent of the supply voltage and temperature. the phase detector current ratio for strong and weak signals is increased to obtain a better performance during both vcr playback and weak signal reception. the switching level is also independent of temperature and supply voltage. vertical synchronization generation of the vertical sawtooth (pin 3) is accomplished by a divider that permits the production of a vertical frequency of either 50 hz or 60 hz with freedom from adjustment, amplitude correction and maximum interference/disturbance protection. a discriminator window checks the vertical trigger pulse. when the trigger pulse occurs before count 576, the divider system operates in the 60 hz mode otherwise the 50 hz mode is selected. (2 clock pulses equal one horizontal line). the divider section operates with different reset windows. these windows are activated via an up/down counter. this increases its count by 1 for each occasion the separated vertical sync pulse is within the selected window. on each occasion the vertical sync. pulse is not within the selected window, the count is reduced by 1. l arge ( search ) window ; divider ratio between 488 - 722 this mode is valid for the following conditions: 1 divider locking to another transmitter 2 divider ratio found, not within the narrow window limits 3 up/down counter value of the divider system operating in narrow window mode, count falls below 10. n arrow window ; divider ratio between 522 - 528 (60 h z ) or 622 - 628 (50 h z ) the divider switches to this mode when the up/down counter has reached its maximum value of 15 approved vertical sync pulses. when the divider operates in this mode and a vertical sync pulse is missing within the window, the divider is reset at the end of the window and the count lowered by 1. at a counter value below 10, the divider switches to the large window mode. an anti-top flutter pulse is also generated by the divider system. this inhibits the horizontal phase-1 detector during the vertical sync pulse. the width of this pulse depends upon the divider mode. for the large window mode the start is generated at the divider reset. in the narrow window mode the anti-top flutter pulse starts at the beginning of the first equalizing pulse. the anti-top flutter pulse ends at count 10 for 50 hz and count 12 for 60 hz. when out-of-sync is detected by the coincidence detector, the divider is switched to count 625. this results in a stable vertical amplitude when no input signal is available.
february 1992 10 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B limiting values in accordance with the absolute maximum system (iec 134) esd all pins meet: 2000 v, 100 pf, 1500 w 200 v, 200 pf, 0 w thermal resistance symbol parameter min. max. unit t stg storage temperature range - 55 + 150 c t amb operating ambient temperature range - 25 + 65 c v p positive supply voltage (pin 8) - 13.2 v p tot total power dissipation - 2.3 w symbol parameter thermal resistance r th j-a from junction to ambient in free air 30 k/w
february 1992 11 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B characteristics t amb =25 c; supply 12 v; carrier 38.9 mhz negative modulation, unless otherwise speci?ed. symbol parameter conditions min. typ. max. unit supply v p supply voltage range (pin 8) 10 12 13.2 v i p supply current (pin 8) no input 90 115 140 ma i 12 start current (pin 12) note 1 - 6.5 9 ma v 12 start protection level (pin 12) i 12 = 12 ma -- 16.5 v if ampli?er v 9-10(rms) input sensitivity (rms - value) note 2 25 40 65 m v r 9 - 10 differential input resistance note 3 - 1300 -w c 9 - 10 differential input capacitance note 3 - 5 - pf g 9 - 10 gain control range - 74 - db d v 20 output signal expansion for 46 db input signal variation note 4 - 1 - db v 9-10 maximum input signal 100 170 - mv v 9-10 input sensitivity at gain reduction note 2 250 400 650 m v rms video ampli?er (note 5) zero signal output level note 6 v 20 negative modulation 4.7 4.9 5.1 v v 20 positive modulation 2.5 2.7 2.9 v v 20 sync tip (negative modulation) note 7 2.5 2.7 2.9 v v 20 white level (positive modulation) note 7 4.5 4.7 4.9 v v 20 white spot threshold level - 5.5 - v v 20 white spot insertion level - 4 - v z 20 video output impedance - 25 -w i 20(int) internal bias current of npn emitter follower output transistor 1.4 1.8 - ma i source maximum source current 10 -- ma b bandwidth of demodulated output signal 5 6 - mhz g d differential gain note 8 - 25% j d differential phase note 8 - 25 nl video non linearity note 9 - 25% intermodulation note 10 1.1 mhz; blue 50 60 - db 1.1 mhz; yellow 50 60 - db 3.3 mhz; blue 55 65 - db 3.3 mhz; yellow 55 65 - db
february 1992 12 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B s/n signal-to-noise ratio note 11 see fig.5 v i = 10 mv input signal 52 57 - db end of gain control range 57 62 - db v 20 residual carrier signal - 210mv v 20 residual 2nd harmonic of carrier signal - 210mv agc i c11 allowed leakage of the agc capacitor -- 700 na system switch (note 13) agc on sync tip level for negative modulation signals v 32 control voltage 0 - 0.8 v i 32 input current - 100 -- 500 m a agc on white level for positive modulation signals v 32 control voltage 2 - 12 v i 32 input current 0 - 1ma if sync separator i i input current 0.4 0.6 0.8 ma i o output current 22 27 32 m a v 1 clamp level - 3.3 - v tuner agc v 9-10 (rms) minimum starting point for tuner take-over (rms value) -- 0.2 mv v 9-10(rms) maximum starting point for tuner take-over (rms value) 100 150 - mv i 6 maximum tuner agc output swing v 6 = 3 v 4 -- ma v 6 output saturation voltage i 6 = 2 ma -- 300 mv i 6 leakage current -- 1 m a d input signal variation complete tuner control d i 6 = 2 ma 0.2 2 4 db v 2 minimum voltage tuner take-over -- 1v video switching circuit (note 14) e xternal positive video input v 13(p-p) input signal (peak-to-peak value) v o = 2.5 v (p-p) - 1 - v i 13 input current - 1.5 5 m a v 13 sync tip clamping at 1 ma level 1.65 1.85 2.05 v symbol parameter conditions min. typ. max. unit
february 1992 13 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B internal video input 16(p-p) internal video input signal (peak-to-peak value) v o = 2.5 v (p-p) - 2 - v i 16 input current - 1.5 5 m a v 16 noise clamping at 1 ma level 2.2 2.4 2.6 v video output (positive video) v 15(p-p) positive video output signal (peak-to-peak value) 2.3 2.5 2.7 v v 15 sync tip signal - 3 - v i bias internal bias current 1 1.5 - ma i o maximum output current 5 -- ma a crosstalk external to internal notes 12 and 15 - 55 - db a crosstalk internal to external notes 12 and 15 - 55 - db video switch v 18 input voltage for internal video -- 0.8 v v 18 input voltage for external video 2 - v p v i 18 maximum current pin 18 = 0 v - 0.05 0.2 ma pin 18 = 12 v - 0.25 1 ma afc-circuit (note 16) i 22 afc sample and hold switch-off current 0.1 -- ma i o output current v 22 = 0 v 0.2 0.4 0.8 ma i il leakage current -- 1 m a v 21 afc output voltage swing 10.5 - 11.5 v i 21 available output current 0.2 -- ma control slope - 100 - mv/khz v 21 output voltage afc off 5.5 6 6.5 v r o afc output resistance measured at an input signal amplitude of 150 m v(rms) - 40 - k w v 21(p-p) output voltage swing note 12 - 11 - v control slope note 12 - 80 - mv/khz v 21 output voltage shift with respect to v i = 10 mv (rms) note 12 -- 2 - v afc polarity switch i 12 sink current for negative slope -- 1 m a i 12 sink current for positive slope 0.1 -- ma i 12 maximum current v 12 = 0 v -- 1ma v 12 switching level 5 - 7v symbol parameter conditions min. typ. max. unit
february 1992 14 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B sync separator (see fig.6) v 28 required sync pulse amplitude note 17 200 750 - mv i 28 input current v 28 = 5 v v 28 =0v - - 8 - 10 - - m a ma first control loop d f rx pll holding range - 1500 2000 hz d f xl pll catching range 600 1500 - hz control sensitivity to oscillator note 18 see fig.7 second control loop (positive edge) d td/ d to control sensitivity note 19 - 100 - td control range - 25 -m s phase adjustment (via second control loop) control sensitivity - 25 -m a/ m s a maximum allowed phase shift - 2 -m s horizontal oscillator (note 19) f ft free running frequency r = 34.3 k w c = 2.7 nf - 15625 - hz d f osc spread with ?xed external components -- 4% d f osc frequency variations with supply voltage from 10 to 13.2 v -- 2% d ft frequency variation with temperature note 12 -- 1.6 - hz/k d f fr maximum frequency deviation at start of horizontal output -- 10 % d f osc frequency variation when only noise is received note 12 -- 500 hz horizontal output (open collector) v 29 output limiting voltage -- 16.5 v v ol output voltage low i sink = 10 ma - 0.3 0.5 v i sink maximum sink current 10 -- ma s output signal duty factor - 46 - % t r rise time output pulse - 260 - ns t f fall times output pulse - 100 - ns flyback input and sandcastle output (note 22, fig.6) i 30 required input current during ?yback pulse 0.1 - 2ma v 30 output voltage during burstkey 8 -- v horizontal blanking 4 4.4 5 v during vertical blanking 2.1 2.5 2.9 v symbol parameter conditions min. typ. max. unit
february 1992 15 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B t w pulse width burst key at: 60 hz 60 hz 2.9 3.3 3.7 m s 50 hz 50 hz 3.2 3.6 4 m s horizontal blanking ?yback pulse vertical blanking t 1 divider in search window 50 hz - 21 - lines 60 hz - 17 - lines t 2 divider in narrow window 50 hz - 25 - lines 60 hz - 21 - lines delay between the start of the sync pulse at the video output and the burst key pulse t bkt trailing edge 60 hz -- 9.4 m s t bkr rising edge 4.7 5.4 6.1 m s vcr switch (non-vcr mode; v 17 < 5 v) r 17 resistance to ground -- 5k w i 17 output current pin 17 = 0 v -- 0.5 ma vcr switch (auto-vcr mode) i 17 source current -- 30 m a i 17 sink current -- 30 m a vcr switch (vcr mode; v 17 > 7 v) r 17 resistance to v cc -- 5k w i 17 input current v 17 = v cc -- 1ma v 9-10(rms) if input signal for switching from fast to slow in auto vcr mode (rms value) - 2.2 - mv vertical ramp generator (note 21) i 3 input current during scan -- 2 m a i 3 discharge current during retrace - 0.8 - ma v 3(p-p) sawtooth amplitude (peak-to-peak value) - 1.9 - v t interlace timing of the internal pulses note 12 30 32 34 m s vertical output i 4 available output current v 4 = 4 v -- 3ma v 4 maximum available output voltage i 4 = 0.1 ma 4.4 5 - v symbol parameter conditions min. typ. max. unit
february 1992 16 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B vertical feedback input v 5 dc input voltage 2.9 3.3 3.7 v v 5(p-p) ac input voltage (peak-to-peak value) - 1 - v i 5 input current -- 12 m a d tp internal pre-correction to sawtooth - 3 - % deviation amplitude 50/60 hz -- 2% temperature dependency of the amplitude note 12 d t=45 c -- 2% vertical guard (v pin 30 = 2.5 v) d v 5 active switch level at a deviation with respect to the dc feedback level note 22 guard level low - 1.5 - v guard level high - 2 - v coincidence detector/transmitter identi?cation (note 23) v 25 voltage for in-sync condition - 9.8 - v v 25 voltage for no-sync condition no signal - 0.3 - v v 25 switching level to switch the phase detector from fast to slow 6.2 6.7 7.2 v v 25 hysteresis slow to fast - 0.6 - v v 25 switching level to activate the mute function (transmitter identi?cation) 2.5 2.8 3.1 v v 25 hysteresis mute function - 2.5 - v video transmitter identi?cation output v 14 output voltage active no sync; i = 1 ma - 0.3 0.5 v i 14 sink current active -- 5ma i 14 output current inactive (transmitter present) -- 1 m a 50/60 hz identi?cation (note 24) v 14 output voltage at 50 hz - v s - v v 14 output voltage at 60 hz - 9 - v symbol parameter conditions min. typ. max. unit
february 1992 17 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B notes to the characteristics 1. supplying a current of 9 ma to pin 12 starts the horizontal oscillator. this current can be obtained via a bleed circuit from the mains rectifier whilst the main supply for the device (v p ) is obtained from the horizontal output stage. the load current of the driver must be added to the value given above. 2. on set agc. 3. the input impedance has been chosen such that a saw filter can be employed. 4. measured with 0 db = 450 m v. 5. measured at 10 mv (rms) 100% input signal. 6. projected zero point; i.e. with switched demodulator. 7. the output signal amplitude is determined by the agc detector. for negative modulation the sync tip level is used as reference. with positive modulation the white level is stabilized 8. measured according to the test line given in fig.3. a) the differential gain is expressed as a percentage of the difference in peak amplitudes between the largest and smallest value relative to the subcarrier amplitude at blanking level. b) the differential phase is defined as the difference in degrees between the largest and smallest phase angle. c) the differential gain and phase are measured with a dsb signal. 9. this figure is valid for the complete video signal amplitude (peak white to black). the non-linearity is expressed as a percentage of the maximum deviation of a luminance step from the mean step, with respect to the mean step. 10. the test set-up and input conditions are given in fig.5. the figures are measured at an input signal of 10 mv (rms). 11. measure with a source impedance of 75 w . the signal-to-noise ratio = 12. these figures are based on sample tests. 13. by means of the system switch, two conditions can be obtained. negative modulation with sync tip level agc. this is obtained with pin 32 connected to ground. positive modulation with peak white agc. this is obtained with pin 32 connected to the positive supply. 14. when the video switch is in the external mode the first control loop in the synchronization circuit is not switched to a long time constant when weak signals are received. 15. defined as ; measured at 4.4 mhz. 16. the indicated figures are measured at an input signal of 10 mv rms. the unloaded q-factor of the reference tuned circuit is 70. with very weak input signals the drive signal for the afc circuit will have a high noise content. this noise input has a asymmetrical frequency spectrum which will cause an offset of the afc output voltage. to avoid problems due to this effect a notch filter can be built into the demodulator tuned circuit. the characteristics given for weak signals are measured without a notch circuit, with a saw filter connected in front of the ic input signal such that the input signal of the ic is 150 m v (rms value). 17. the minimum value is obtained by connecting a 1.8 k w resistor between pins 15 and 28. the slicing level can be varied by changing the value of this resistor (higher resistor value results in larger value of the minimum sync pulse amplitude). the slicing level is independent of the video information. 18. frequency control is obtained by supplying a correction current to the oscillator rc network via a resistor connected between the phase 1 detector output and the oscillator network. the oscillator can be adjusted to the correct frequency by short circuiting the sync separator bias network (pin 28) to +v p . to avoid the need of a vcr switch the time constant of the phase detector at strong input signals is sufficiently short to get a stable picture during vcr playback. during the vertical retrace period the time constant is even shorter so that the head-errors of the vcr are 20 log v o black-to-white v nrms () atb=5mhz ----------------------------------------------------------- 20 log () v o unwanted video black-to-white v o wanted video-black-to-white ------------------------------------------------------------------------------------------ -
february 1992 18 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B compensated at the beginning of scan. during conditions of weak signal (information derived from the agc circuit) the time constant is increased to obtain a better noise immunity. 19. this figure is valid for an external load impedance of 82 w from pin 31 to the shift adjustment potentiometer. 20. the flyback input and sandcastle output have been combined on one pin. the flyback pulse is clamped to a level of 4.5 v. the minimum current to drive the second control loop is 0.1 ma. 21. the vertical scan is synchronized by means of a divider system. therefore no adjustment is required for the ramp generator. the divider detects whether the incoming signal has a vertical frequency of 50 or 60 hz and corrects the vertical amplitude. 22. to avoid crt screen burn due to a collapse of the vertical deflection a continuous blanking level is inserted in the sandcastle pulse when the feedback voltage of the vertical deflection is not within the specified limits. 23. the functions in-sync/out-of-sync and transmitter identification have been combined on this pin. the capacitor is charged during the sync pulse and discharged during the time difference between gating (6.5 / m s) and the sync pulse in the internal video mode. when the circuit is in the external mode the capacitor is charged by the horizontal sync pulse and discharged continuously with a small current. 24. when the mute is active no 50/60 hz information is available. fig.2 video output signal. fig.3 ebu test signal waveform (line 17).
february 1992 19 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B fig.4 test set-up intermodulation. input signal conditions sc = sound carrier cc = chrominance carrier pc = picture carrier all with respect to top sync level value at 1.1 mhz : 20 v o at 4.4mhz v o at 1.1mhz ----------------------------------- - log 3.6db + value at 3.3mhz : 20 v o at 4.4mhz v o at 3.3mhz ----------------------------------- - log
february 1992 20 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B fig.5 signal-to noise ratio as a function of the input voltage (0 db = 100 mv).
february 1992 21 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B fig.6 timing diagram. 50 hz 60 hz t 1 - search window - 42 p 34 p t 2 - narrow window - 50 p 42 p t 3 - burst key pulse - 3.6 m s 3.3 m s p 1 2f h -------- = ? ??
february 1992 22 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B coincidence detector switching levels condition pin 18 video switch condition pin 17 vcr switch condition v 25 control sensitivity hor.oscillator khz / s t2 - t1 t3 = scan low internal video ?oating automatic vcr v 25 > 6.7 v and strong signal 11.3 7.6 weak signal 1.3 1.3 v 25 < 6.1 v and strong signal 11.3 7.6 weak signal 11.3 7.6 high forced vcr don't care 11.3 7.6 low t.v. mode v 25 > 6.7 v v 25 < 6.1 v 1.3 11.3 1.3 7.6 high or ?oating external video don't care don't care 11.3 7.6 fig.7 switching levels coincidence detector.
february 1992 23 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B fig.8 horizontal oscillator control sensitivity.
february 1992 24 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B fig.9 application diagram.
february 1992 25 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B package outline unit b 1 cee m h l references outline version european projection issue date iec jedec eiaj mm dimensions (inch dimensions are derived from the original mm dimensions) sot201-1 90-01-22 95-01-25 b max. w m e e 1 1.7 1.3 0.53 0.38 0.32 0.23 41.6 40.6 14.2 13.8 3.6 3.2 0.25 2.54 15.24 15.80 15.24 17.15 15.90 2.2 5.0 0.51 4.0 inches 0.066 0.051 0.021 0.015 0.013 0.009 1.64 1.60 0.56 0.54 0.14 0.13 0.01 0.10 0.60 0.62 0.60 0.68 0.63 0.087 0.20 0.020 0.16 m h c (e ) 1 m e a l seating plane a 1 w m b 1 e d a 2 z 32 1 17 16 b e pin 1 index 0 5 10 mm scale note 1. plastic or metal protrusions of 0.25 mm maximum per side are not included. (1) (1) d (1) z a max. 12 a min. a max. dip32: plastic dual in-line package; 32 leads (600 mil) sot201-1
february 1992 26 philips semiconductors product speci?cation small signal combination for multistandard colour tv TDA4504B 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). soldering by dipping or by wave the maximum permissible temperature of the solder is 260 c; solder at this temperature must not be in contact with the joint for more than 5 seconds. the total contact time of successive solder waves must not exceed 5 seconds. the device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (t stg max ). if the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. repairing soldered joints apply a low voltage soldering iron (less than 24 v) to the lead(s) of the package, below the seating plane or not more than 2 mm above it. if the temperature of the soldering iron bit is less than 300 c it may remain in contact for up to 10 seconds. if the bit temperature is between 300 and 400 c, contact may be up to 5 seconds. definitions 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. data sheet status objective speci?cation this data sheet contains target or goal speci?cations for product development. preliminary speci?cation this data sheet contains preliminary data; supplementary data may be published later. product speci?cation this data sheet contains ?nal product speci?cations. 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 speci?cation 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 speci?cation.

▲Up To Search▲

Price & Availability of TDA4504B

	To Download TDA4504B Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .