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INTEGRATED CIRCUITS
DATA SHEET
TDA4504B Small signal combination for multistandard colour TV
Product specification File under Integrated Circuits, IC02 February 1992
Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
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
TDA4504B
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 EXTENDED TYPE NUMBER TDA4504B Note 1. SOT201-1; 1996 November 29 PACKAGE PINS 32 PIN POSITION DIL MATERIAL plastic CODE SOT201(1)
February 1992
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
TDA4504B
February 1992
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Fig.1 Block diagram.
Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
QUICK REFERENCE DATA SYMBOL Supply V8 I8 I12 Video V9-10 G9-10 S/N V21 Video switch 16(p-p) V13(p-p) V15(p-p) Sync V28 I30 V30 sync pulse input amplitude (p-p) flyback input current sandcastle output during burst key - during hor. blanking - during vert. blanking V14 video transmitter identification - no signal condition - 50 Hz signal - 60 Hz signal V5 V5(p-p) vert. feedback - DC voltage - AC voltage 2.9 - 3.3 1 - - - 0.3 12 9 200 0.1 8 4 2.1 - - - 4.4 3.3 internal video input external video input video output - - - 2 1 2.5 IF sensitivity (RMS value) IF gain control range signal to noise ratio AFC output voltage swing video output amplitude Vi input signal = 10 mV 25 - - 10.5 - 40 74 58 - 2 positive supply voltage pin 8 supply current pin 8 start current pin 12 10 90 - 12 115 6.5 PARAMETER CONDITIONS MIN. TYP.
TDA4504B
MAX.
UNIT
13.2 140 9
V mA mA µV dB dB V V
65 - - 11.5 - - - - - 2 - 5 3.7 - - - 3.7 -
V V V
mV mA V V V V V V V V
February 1992
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
PINNING PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 black level internal video AGC take over (output) vertical ramp generator (output) vertical drive (output) vertical feedback (input) tuner AGC (input) ground supply voltage vision IF (input) vision IF (input) IF AGC (output) start horizontal oscillator (output)/AFC polarity switch (input) external video (input) mute/50 / 60 Hz (output) video switch (output) internal video (input) VCR switch (input) video switch (input) ground for some critical parts video amplifier (output) AFC (output) AFC S/H, AFC switch (input) vision demodulator tuned circuit vision demodulator tuned circuit coincidence detector/transmitter identification horizontal oscillator phase 1 detector (output) sync separator (input) horizontal drive (output) sandcastle output/horizontal flyback (input) phase 2 detector (output) AGC system switch (input) DESCRIPTION
TDA4504B
February 1992
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
FUNCTIONAL DESCRIPTION Vision IF amplifier, demodulator and video amplifier 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.
TDA4504B
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
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
AGC circuit
TDA4504B
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):
pin 32 pin 32
HIGH/open: LOW:
positive modulation negative modulation
The AGC detector currents are: positive modulation charge discharge 1 µA 3 mA negative modulation 55 µA 1.5 mA
With a 6.8 µF 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 µA until the detection of a transmitted signal. The transmitter identification 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 resistor between pin 25 and VCC 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: Input signal Pins 9 and 10 pin 25 pin 28 pin 18 pin 14 50 Hz 9.5 V 50 Hz LOW 12 V 60 Hz 9.5 V 60 Hz LOW 9V none 0.3 V none LOW/ HIGH 0.3 V 50/60 Hz 9.5 V 50 Hz HIGH 12 V 50/60 Hz 9.5 V 60 Hz HIGH 9V 50/60 Hz 9.5 V none HIGH 12 V none 0.3 V 50/60 Hz HIGH 0.3 V
February 1992
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
50/60 Hz Information
TDA4504B
In the external video mode and with a resistor of 1 M from pin 25 to VCC the mute is overruled by the 50/60 Hz information from the divider system. 50/60 Hz Truth Table: Input Signal 50 Hz Pin 9/10 Pin 25 Pin 28 Pin 18 Pin 14 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: pin 17 pin 17 pin 17 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: pin 18 pin 18 LOW: HIGH: internal video external video HIGH: n.c.: LOW: VCR mode auto VCR mode TV mode slow time constant; gated fast time constant; ungated 9.5 50 Hz LOW 12 9.5 60 Hz LOW 9 0.3 None LOW 0.3 9.5 50 Hz HIGH 12 9.5 60 Hz HIGH 9 9.5 None HIGH 12 60 Hz None Don't care Don't care Don't care
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 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.
February 1992
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
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. LARGE (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.
TDA4504B
NARROW WINDOW; DIVIDER RATIO 522 - 528 (60 HZ) OR 622 628 (50 HZ)
BETWEEN
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
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
LIMITING VALUES In accordance with the Absolute Maximum System (IEC 134) SYMBOL Tstg Tamb VP Ptot ESD All pins meet: 2000 V, 100 pF, 1500 200 V, 200 pF, 0 THERMAL RESISTANCE SYMBOL Rth j-a PARAMETER from junction to ambient in free air PARAMETER storage temperature range operating ambient temperature range positive supply voltage (pin 8) total power dissipation MIN. - 55 - 25 - -
TDA4504B
MAX. + 150 + 65 13.2 2.3 °C °C V W
UNIT
THERMAL RESISTANCE 30 K/W
February 1992
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
CHARACTERISTICS Tamb = 25 °C; supply 12 V; carrier 38.9 MHz negative modulation, unless otherwise specified. SYMBOL Supply VP IP I12 V12 IF Amplifier V9-10(RMS) R9-10 C9-10 G9-10 V20 V9-10 V9-10 input sensitivity (RMS-value) differential input resistance differential input capacitance gain control range output signal expansion for 46 dB input signal variation maximum input signal input sensitivity at gain reduction note 2 note 4 note 2 note 3 note 3 25 - - - - 100 250 40 1300 5 74 1 170 400 supply voltage range (pin 8) supply current (pin 8) start current (pin 12) start protection level (pin 12) no input note 1 I12 = 12 mA 10 90 - - 12 115 6.5 - PARAMETER CONDITIONS MIN. TYP.
TDA4504B
MAX.
UNIT
13.2 140 9 16.5
V mA mA V µV pF dB dB mV µVRMS
65 - - - - - 650
Video Amplifier (note 5) Zero signal output level V20 V20 V20 V20 V20 V20 Z20 I20(int) Isource B Gd d NL negative modulation positive modulation sync tip (negative modulation) white level (positive modulation) white spot threshold level white spot insertion level video output impedance internal bias current of NPN emitter follower output transistor maximum source current bandwidth of demodulated output signal differential gain differential phase video non linearity intermodulation 1.1 MHz; blue 1.1 MHz; yellow 3.3 MHz; blue 3.3 MHz; yellow note 8 note 8 note 9 note 10 50 50 55 55 60 60 65 65 - - - - dB dB dB dB note 7 note 7 note 6 4.7 2.5 2.5 4.5 - - - 1.4 10 5 - - - 4.9 2.7 2.7 4.7 5.5 4 25 1.8 - 6 2 2 2 5.1 2.9 2.9 4.9 - - - - - - 5 5 5 V V V V V V mA mA MHz % ° %
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
TDA4504B
SYMBOL S/N
PARAMETER signal-to-noise ratio Vi = 10 mV input signal end of gain control range
CONDITIONS note 11 see Fig.5
MIN.
TYP.
MAX.
UNIT
52 57 - - -
57 62 2 2 -
- - 10 10
dB dB mV mV
V20 V20 AGC IC11
residual carrier signal residual 2nd harmonic of carrier signal
allowed leakage of the AGC capacitor
700
nA
System switch (note 13) AGC on sync tip level for negative modulation signals V32 I32 control voltage input current AGC on white level for positive modulation signals V32 I32 II IO V1 Tuner AGC V9-10 (RMS) V9-10(RMS) I6 V6 I6 V2 minimum starting point for tuner take-over (RMS value) maximum starting point for tuner take-over (RMS value) maximum tuner AGC output swing output saturation voltage leakage current input signal variation complete tuner control minimum voltage tuner take-over I6 = 2 mA V6 = 3 V I6 = 2 mA - 100 4 - - 0.2 - - 150 - - - 2 - 0.2 - - 300 1 4 1 mV mV mA mV µA dB V control voltage input current 2 0 - - 12 1 V mA 0 -100 - - 0.8 -500 V µA
IF sync separator input current output current clamp level 0.4 22 - 0.6 27 3.3 0.8 32 - mA µA V
Video Switching Circuit (note 14) EXTERNAL POSITIVE VIDEO INPUT V13(p-p) I13 V13 input signal (peak-to-peak value) input current sync tip clamping at 1 mA level VO = 2.5 V(p-p) - - 1.65 1 1.5 1.85 - 5 2.05 V µA V
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
TDA4504B
SYMBOL INTERNAL VIDEO INPUT 16(p-p) I16 V16 V15(p-p) V15 Ibias IO
PARAMETER
CONDITIONS
MIN. - - 2.2
TYP.
MAX. - 5 2.6
UNIT
Internal video input signal (peak-to-peak value) input current noise clamping at 1 mA level
VO = 2.5 V (p-p)
2 1.5 2.4
V µA V
VIDEO OUTPUT (POSITIVE VIDEO) positive video output signal (peak-to-peak value) sync tip signal internal bias current maximum output current crosstalk external to internal crosstalk internal to external notes 12 and 15 notes 12 and 15 2.3 - 1 5 - - - 2 pin 18 = 0 V pin 18 = 12 V AFC-circuit (note 16) I22 IO IIL V21 I21 V21 RO AFC sample and hold switch-off current output current leakage current AFC output voltage swing available output current control slope output voltage AFC output resistance measured at an input signal amplitude of 150 µV(RMS) V21(p-p) V21 output voltage swing control slope output voltage shift with respect to VI = 10 mV(RMS) sink current for negative slope sink current for positive slope maximum current switching level V12 = 0 V note 12 note 12 note 12 - 40 - k AFC off V22 = 0 V 0.1 0.2 - 10.5 ±0.2 - 5.5 - 0.4 - - - 100 6 - 0.8 1 11.5 - - 6.5 mA mA µA V mA mV/kHz V - - 2.5 3 1.5 - 55 55 - - 0.05 0.25 2.7 - - - - - V V mA mA dB dB
Video switch V18 V18 I18 input voltage for internal video input voltage for external video maximum current 0.8 VP 0.2 1 V V mA mA
- - -
11 80 -2
- - -
V mV/kHz V
AFC polarity switch I12 I12 I12 V12 - 0.1 - 5 - - - - 1 - 1 7 µA mA mA V
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
TDA4504B
SYMBOL Sync separator (see Fig.6) V28 I28
PARAMETER
CONDITIONS
MIN.
TYP.
MAX. - - - ±2000 -
UNIT
required sync pulse amplitude input current
note 17 V28 = 5 V V28 = 0 V
200 - - - ±600
750 8 -10 ±1500 ±1500
mV µA mA
First control loop fRX fXL PLL holding range PLL catching range control sensitivity to oscillator Second control loop (positive edge) td/to td control sensitivity control range note 19 - - - - - - - note 12 - - note 12 - 100 25 - - - - - 4 2 - 10 500 µs µA/µs µs note 18 Hz Hz
see Fig.7
Phase adjustment (via second control loop) control sensitivity maximum allowed phase shift Horizontal oscillator (note 19) fft fosc fosc fT ffr fosc free running frequency spread with fixed external components frequency variations with supply voltage from 10 to 13.2 V frequency variation with temperature maximum frequency deviation at start of Horizontal output frequency variation when only noise is received R = 34.3 k C = 2.7 nF 15625 - - -1.6 - - Hz % % Hz/K % Hz 25 ±2
Horizontal output (open collector) V29 VOL Isink S tr tf I30 V30 output limiting voltage output voltage LOW maximum sink current output signal duty factor rise time output pulse fall times output pulse Isink = 10 mA - - 10 - - - - 0.3 - 46 260 100 - - 4.4 2.5 16.5 0.5 - - - - V V mA % ns ns
Flyback input and sandcastle output (note 22, Fig.6) required input current during flyback pulse output voltage during burstkey horizontal blanking during vertical blanking 8 4 2.1 - 5 2.9 V V V 0.1 2 mA
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
TDA4504B
SYMBOL tW pulse width burst key at: 60 Hz 50 Hz
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
60 Hz 50 Hz
2.9 3.2
3.3 3.6
3.7 4
µs µs
horizontal blanking vertical blanking T1 T2 divider in search window divider in narrow window delay between the start of the sync pulse at the video output and the burst key pulse tBkt tBkr trailing edge rising edge 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz
flyback pulse - - - - 21 17 25 21 - - - - lines lines lines lines
- 4.7 -
- 5.4 - - - - - - 2.2
9.4 6.1
µs µs
VCR switch (non-VCR mode; V17 < 5 V) R17 I17 I17 I17 resistance to ground output current pin 17 = 0 V 5 0.5 k mA µA µA - - - - V17 = VCC - -
VCR switch (auto-VCR mode) source current sink current 30 30
VCR switch (VCR mode; V17 > 7 V) R17 I17 V9-10(rms) resistance to VCC input current IF input signal for switching from fast to slow in auto VCR mode (RMS value) 5 1 - k mA mV
Vertical ramp generator (note 21) I3 I3 V3(p-p) t input current during scan discharge current during retrace sawtooth amplitude (peak-to-peak value) interlace timing of the internal pulses note 12 - - - 30 - 4.4 - 0.8 1.9 32 - 5 2 - - 34 µA mA V µs
Vertical output I4 V4 available output current maximum available output voltage V4 = 4 V I4 = 0.1 mA 3 - mA V
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
TDA4504B
SYMBOL Vertical feedback input v5 V5(p-p) I5 tp
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
DC input voltage AC input voltage (peak-to-peak value) input current internal pre-correction to sawtooth deviation amplitude temperature dependency of the amplitude 50/60 Hz note 12 T = 45 °C
2.9 - - - - -
3.3 1 - 3 - -
3.7 - 12 - 2 2
V V µA % % %
Vertical guard (Vpin 30 = 2.5 V) V5 active switch level at a deviation with respect to the DC feedback level guard level LOW guard level HIGH Coincidence detector/transmitter identification (note 23) V25 V25 V25 V25 V25 V25 V14 I14 I14 V14 V14 voltage for in-sync condition voltage for no-sync condition switching level to switch the phase detector from fast to slow hysteresis slow to fast switching level to activate the mute function (transmitter identification) hysteresis mute function no signal - - 6.2 - 2.5 - - - - - - 9.8 0.3 6.7 0.6 2.8 2.5 - - 7.2 - 3.1 - V V V V V V note 22 - - 1.5 2 - - V V
Video transmitter identification output output voltage active sink current active output current inactive (transmitter present) no sync; I = 1 mA 0.3 - - 0.5 5 1 - - V mA µA
50/60 Hz identification (note 24) output voltage at 50 Hz output voltage at 60 Hz Vs 9 V V
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
Notes to the characteristics
TDA4504B
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 (VP) 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 µV. 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 . The signal-to-noise ratio = V o black-to-white 20 log ----------------------------------------------------------V n ( RMS ) at B = 5 MHz 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. V o unwanted video black-to-white 15. Defined as ( 20 log ) ------------------------------------------------------------------------------------------ ; measured at 4.4 MHz. V o wanted video-black-to-white 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 µV (RMS value). 17. The minimum value is obtained by connecting a 1.8 k 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 +VP. 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 February 1992 17
Philips Semiconductors
Product specification
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 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 / µs) 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).
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
TDA4504B
Input signal conditions SC = Sound carrier CC = Chrominance carrier PC = Picture carrier All with respect to top sync level
V o at 4.4MHz Value at 1.1 MHz : 20 log ----------------------------------- + 3.6dB V o at 1.1MHz V o at 4.4MHz Value at 3.3MHz : 20 log ----------------------------------V o at 3.3MHz
Fig.4 Test set-up intermodulation.
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Philips Semiconductors
Product specification
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).
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
TDA4504B
50 Hz T1 T2 T3 search window narrow window burst key pulse 42 p 50 p 3.6 µs
60 Hz 34 p 42 p 3.3 µs
1 p = -------- 2f H Fig.6 Timing diagram.
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
TDA4504B
Fig.7 Switching levels coincidence detector.
COINCIDENCE DETECTOR SWITCHING LEVELS CONDITION PIN 18 VIDEO SWITCH Low internal video CONDITION PIN 17 VCR SWITCH floating automatic VCR CONDITION V25 V25 >6.7 V and strong signal weak signal V25 < 6.1 V and strong signal weak signal HIGH forced VCR LOW T.V. mode HIGH or floating external video don't care don't care V25 > 6.7 V V25 < 6.1 V don't care 11.3 11.3 11.3 1.3 11.3 11.3 7.6 7.6 7.6 1.3 7.6 7.6 11.3 1.3 7.6 1.3 CONTROL SENSITIVITY HOR.OSCILLATOR kHz / S T2 - T1 T3 = SCAN
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
TDA4504B
Fig.8 Horizontal oscillator control sensitivity.
February 1992
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Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
TDA4504B
Fig.9 Application diagram.
February 1992
24
Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
PACKAGE OUTLINE DIP32: plastic dual in-line package; 32 leads (600 mil)
TDA4504B
SOT201-1
seating plane
D
ME
A2
A
L e b1
A1 Z c w M (e 1) MH b 32 17
pin 1 index E
1
16
0
5 scale
10 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 5.0 0.20 A1 min. 0.51 0.020 A2 max. 4.0 0.16 b 1.7 1.3 0.066 0.051 b1 0.53 0.38 0.021 0.015 c 0.32 0.23 0.013 0.009 D (1) 41.6 40.6 1.64 1.60 E (1) 14.2 13.8 0.56 0.54 e 2.54 0.10 e1 15.24 0.60 L 3.6 3.2 0.14 0.13 ME 15.80 15.24 0.62 0.60 MH 17.15 15.90 0.68 0.63 w 0.25 0.01 Z (1) max. 2.2 0.087
Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT201-1 REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION
ISSUE DATE 90-01-22 95-01-25
February 1992
25
Philips Semiconductors
Product specification
Small signal combination for multistandard colour TV
SOLDERING Introduction
TDA4504B
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 (Tstg 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 Data sheet status Objective specification Preliminary specification Product specification 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. 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.
February 1992
26