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INTEGRATED CIRCUITS
DATA SHEET
TDA8303
TDA8303A
Small signal combination IC for
black/white TV
July 1992
Preliminary specification
File under Integrated Circuits, IC02
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A FEATURES The IF amplifier is followed by a passive synchronous demodulator providing a regenerated carrier signal. This is • Video IF amplifier with synchronous demodulator limited by a logarithmic limiter circuit prior to its application • Automatic gain control (AGC) detector suitable for to the demodulator. The limiter has a very low differential negative modulation phase shift whic
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Supply V positive supply voltage (pin 7) 9.5 12 13.2 V P I supply current (pin 7) 90 125 160 mA P I start current (pin 11) note 1 - 6.5 9 mA start Video V IF sensitivity (RMS value) at 38.9 MHz; 20 40 65 μV 8-9(RMS) note 2 G IF gain control range - 74 - dB 8-9 S/N signal-to-noise ratio input signal = - 57 - dB 10 mV V
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Philips Semiconductors Preliminary specification Small signal combination IC for black/white TDA8303 TV TDA8303A July 1992 4 Fig.1 Block diagram
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Philips Semiconductors Preliminary specification Small signal combination IC for black/white TDA8303 TV TDA8303A PINNING Sound circuit The sound quality of the TDA8303/TDA8303A compared PIN DESCRIPTION with the predecessors has been improved at weak signal 1 AGC take-over conditions. The improvement has been achieved by the 2 vertical ramp generator new IF amplifier which is less sensitive for radiation from the sound IF amplifier and by change of the ground and 3 vertical drive supply connection
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A Narrow window mode: divider ratio between 522 and 528 ensures a stable display which is not disturbed by the (60 Hz); or 622 and 628 (50 Hz). noise in the video signal. When the circuit is not synchronized the time constant is fast and not gated to • The divider system switches over to narrow window ensure a short catching time. mode when the up/down counter has reached his maximum val
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A CHARACTERISTICS V = 12 V;T = 25 °C; carrier 38.9 MHz negative modulation, unless otherwise specified P amb SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Supply (pin 7) V supply voltage range 9.5 12 13.2 V P I supply current no input 90 125 160 mA P I start current (pin 11) note 1 - 6.5 9 mA 11 V start voltage horizontal oscillator 9.5 -- V 11 V start protection level I = 12 mA -- 16.5
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT S/N signal-to-noise ratio 10 mV input 50 57 - dB signal S/N signal-to-noise ratio end of gain 50 62 - dB control range V residual carrier signal - 210 mV 17 V residual 2nd harmonic of carrier signal - 210 mV 17 Tuner AGC V minimum starting point for tuner take- over -- 0.2 mV 8-9(RMS) (RMS value) V maximum starting point for tuner take- o
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Sound circuit (note 12) V input limiting voltage V = - 3 dB - 400 800 μV 15 O(max) R input resistance - 2.6 - kΩ 15 C input capacitance - 6 - pF 15 AMS AM suppression note 13 53 58 - dB V AF output signal (RMS value) note 14 400 600 800 mV 12(RMS) V AF output signal when pin 11 is used as a Δf = 50 kHz 500 900 1500 mV 12(RMS) starting pin
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT SECOND CONTROL LOOP (POSITIVE EDGE) control sensitivity note 22 - 100 - δt d ------ - δt o t control range - 25 -μs d PHASE ADJUSTMENT (VIA SECOND CONTROL LOOP) control sensitivity - 25 -μ A/μs α maximum allowed phase shift -±2 -μs HORIZONTAL OSCILLATOR f free running frequency R = 34.3 kΩ; - 15625 - Hz fr C = 2.7 nF Δf spread with fixed e
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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 I input current during scan -- 2 μA 2 I discharge current during retrace - 0.8 - mA 2 V sawtooth amplitude (peak-to-peak value) - 1.9 - V 2(p- p) t interlace timing of the internal pulses 30 32 34 μs VERTICAL OUTPUT I available output current V = 4 V -- 3mA 3 3 V maximum available output
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Philips Semiconductors Preliminary specification TDA8303 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 Δf = 7.5 kHz and maximum volume control. 15. The demodulator tuned circuit must be tuned at minimum distortion.
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A handbook, full pagewidth MLA667 100% 17.5% 95% 30% Fig.2 Video output signal. handbook, full pagewidth MBC211 100% 86% 72% 58% 44% 30% μs 10 12 22 26 32 36 40 44 48 52 56 60 64 Fig.3 EBU test signal waveform (line 330). July 1992 13
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A handbook, full pagewidth PC 38.9 MHz SC TEST SPECTRUM Σ ATTENUATOR 33.4 MHz CIRCUIT ANALYZER gain setting adjusted CC for blue or yellow 34.5 MHz MLA666 3.2 dB handbook, full pagewidth 10 dB 13.2 dB 13.2 dB 30 dB 30 dB SC CC PC SC CC PC MBC213 BLUE YELLOW Input signal conditions SC = Sound carrier CC = Chrominance carrier PC = Picture carrier All with respect to top sync level V at 4.
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A Fig.5 Signal-to-noise ratio as a function of the input voltage (0 dB = 100 mV). Fig.6 Test set-up AM suppression. July 1992 15
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A Fig.7 AM suppression. Fig.8 Volume control characteristics. July 1992 16
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A Fig.9 Timing diagram. July 1992 17
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A Table 1 Switching levels coincidence detector CONTROL SENSITIVITY CONDITION HORIZONTAL OSCILLATOR (kHz/μS) V 22 T2 - T1 T3 = SCAN V > 6.7 V 22 and strong signal 11.3 7.6 weak signal 1.3 1.3 1 < V < 5.7 V 22 and strong signal 11.3 7.6 weak signal 11.3 7.6 V < 0.7 11.3 7.6 22 Fig.10 Switching levels coincidence detector. Fig.11 Anti-top-flutter pulse. July 1992 18
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A Fig.12 Application diagram. July 1992 19
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Philips Semiconductors Preliminary specification TDA8303 Small signal combination IC for black/white TV TDA8303A PACKAGE OUTLINE DIP28: plastic dual in-line package; 28 leads (600 mil) handbook, full pagewidth SOT117-1 D M E A 2 A L A 1 c e w M Z b 1 (e ) 1 b 28 15 M H pin 1 index E 1 14 0 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) (1) A A A (1) (1) Z 1 2 UNIT b b cD EeM eL M w 1 1 EH max. min. max. max. 1.7 0.53 0.32 36.0 14.1 3.9 15.80 17.15 mm 5.1
