valutazioni - 3, GPA: 4.7
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TYP. MAX. UNIT SECOND CONTROL LOOP (POSITIVE EDGE) dtd dto ------ control sensitivity note 22 - 100 - td control range - 25 - ms PHASE ADJUSTMENT (VIA SECOND CONTROL LOOP) control sensitivity - 25 - mA/ms a maximum allowed phase shift - ±2 - ms HORIZONTAL OSCILLATOR ffr free running frequency R = 34.3 kW; C = 2.7 nF - 15625 - Hz Df spread with fixed external components - - 4 % Dffr frequency variations with supply voltage from 9.5 to 13.2 V - - 2 % DfT frequency variation with temperature note 25 - -1.6 - Hz/°C Dffr maximum frequency deviation at start of horizontal output - - 10 % Df frequency variation when only noise is received note 25 - - 500 Hz HORIZONTAL OUTPUT (PIN 26; OPEN COLLECTOR) V26 output limiting voltage - - 16.5 V VOL LOW level output voltage Isink = 10 mA - 0.2 0.5 V Isink maximum sink current 10 - - mA duty factor of output signal - 46 - % tr rise time of output pulse - 260 - ns tf fall time of output pulse - 100 - ns HORIZONTAL FLYBACK INPUT (PIN 27) I27 required input current during flyback pulse 0.01 - 1.0 mA COINCIDENCE DETECTOR V22 voltage for in-sync condition - 9.8 - V V22 voltage for no-sync condition no signal - 1.5 - V V22 switching level to the phase detector from fast to slow 6.2 6.7 7.2 V V22 hysteresis slow to fast - 0.6 - V V22 switching level to activate the mute function (transmitter identification) 2.5 2.8 3.1 V V22 hysteresis mute function - 2 - V td delay of mute release after transmitter insertion - - 300 ms allowable load on pin 22 - - 10 mA V22 external video mode - - 0.7 V I22 current at pin 22 V22 = 0 V - - 0.8 mA July 1992 10 Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Vertical circuit (note 24) VERTICAL RAMP GENERATOR I2 input current during scan - - 2 mA I2 discharge current during retrace - 0.8 - mA V2(p-p) sawtooth amplitude (peak-to-peak value) - 1.9 - V t interlace timing of the internal pulses 30 32 34 ms VERTICAL OUTPUT I3 available output current V3 = 4 V - - 3 mA V3 maximum available output voltage I3 = 0.1 mA 4.4 5 - V VERTICAL FEEDBACK INPUT V4 DC input voltage 2.9 3.3 3.7 V V4(p-p) AC input voltage (peak-to-peak value) - 1 - V I4 input current - - 12 mA Dtp internal pre-correction to sawtooth - 3 - % deviation amplitude 50/60 Hz - - 4 % temperature dependency of the amplitude Tamb = 20 to 65 °C - - 2 % Notes to the characteristics 1. Pin 11 has a double function. When during switch-on a current of 9 mA is supplied to this pin, it is used to start the horizontal oscillator. The main supply can then be obtained from the horizontal deflection stage. When no current is supplied to this pin it can be used as a volume control. 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 mV. 5. Measured at 10 mV RMS top sync input signal. 6. Projected zero point; i.e. with switched demodulator. 7. White 10% of the top sync amplitude. 8. Measured according to the test line illustrated by Fig.2. 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. The differential phase is defined as the difference in degrees between the largest and smallest phase angle. 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); see Fig.3. 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 illustrated by Fig.4. The figures are measured at an input signal of 10 mV RMS. 11. Measured with a source impedance of 75W. VO black-to-white The signal-to-noise ratio = 20 log---------------------------------------------------------- ) atB=5MHz VnRMS ( 12. The sound circuit is measured (unless otherwise specified) with an input signal of V15 of 50 mV RMS, a carrier frequency of 5.5 MHz at a Df of 27.5 kHz. The QL of the demodulator tuned circuit is 16 and the volume control is July 1992 11 Philips Semiconductors Preliminary specification Philips Semiconductors Preliminary specification Small signal combination IC for black/white TV TDA8303A connected to the supply. The reference circuit must be tuned in such a way that the output is symmetrical clipping at maximum volume. 13. The test set-up is illustrated by Fig.6. The AM rejection curve (typical) is illustrated by Fig.7. 14. The output signal is measured at a Df = 7.5 kHz and maximum volume control. 15. The demodulator tuned circuit must be tuned at minimum distortion. 16. Weighted noise, measured in accordance with CCIR 468. 17. See also note 1. The volume can be controlled by using a potentiometer connected to ground (value 4.7 kW) or by means of a variable direct voltage. In the latter event the relatively ...
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