Details, datasheet, quote on part number: TDA8303A/N1
CategoryCommunication => Freq/Signal Converters/Generators
DescriptionTDA8303; TDA8303A; Small Signal Combination ic For Black/white TV
CompanyPhilips Semiconductors (Acquired by NXP)
DatasheetDownload TDA8303A/N1 datasheet
Find where to buy


Features, Applications

Preliminary specification File under Integrated Circuits, IC02 July 1992

FEATURES Video IF amplifier with synchronous demodulator Automatic gain control (AGC) detector suitable for negative modulation AGC tuner Automatic frequency control (AFC) circuit with sample-and-hold Video preamplifier Sound IF amplifier and demodulator DC volume control or separate supply for starting the horizontal oscillator Audio preamplifier Horizontal synchronization circuit with two control loops Vertical synchronization (divider system) and sawtooth generation with automatic amplitude adjustment for 50 and 60 Hz Transmitter identification (mute) GENERAL DESCRIPTION The TDA8303/TDA8303A combines all small signal functions (except the tuner) which are required for a monochrome television receiver. For a complete black and white receiver only the output stages for video, sound, horizontal and vertical deflection and a tuner have to be added. The TDA8303 is for applications with npn tuners and the TDA8303A for pnp tuners. FUNCTIONAL DESCRIPTION Video IF amplifier, demodulator and video amplifier Each of the three AC-coupled IF stages permits the omission of DC feedback and possesses a control range in excess of 20 dB. An additional advantage is the symmetry of the amplifier which results in a less critical application. ORDERING INFORMATION EXTENDED TYPE NUMBER TDA8303 TDA8303A Note SOT117-1; 1996 December 3. July 1992 2 PACKAGE PINS 28 PIN POSITION DIL MATERIAL plastic

The IF amplifier 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. The limiter has a very low differential phase shift which results in good differential gain and phase figures. The video amplifier also contains a white spot inverter and a noise clamp which limits interference pulses to a point below the peak sync level. This circuit is more effective than a noise inverter and results in an improved picture stability, with respect to interference. AFC-circuit The reference signal for the AFC circuit is obtained from the demodulator tuned circuit. In this way only one tuned circuit needs to be applied and only one adjustment has to be carried out. The disadvantage with this method is that the frequency spectrum of the signal fed to the detector is determined by the SAW filter characteristic. This spectrum is asymmetrical with respect to the picture carrier so that the AFC output voltage is dependent on the video signal. To overcome this video frequency dependency of the AFC output, the demodulator output is followed by a sample-and-hold circuit which samples during the sync level of the signal. This means that only the carrier signal is available to the AFC and it will not be affected by the video information. At very weak input signals the drive signal of the AFC circuit will contain substantial noise. This noise has an asymmetrical frequency spectrum causing an offset in the AFC output voltage. This effect can be minimized by applying a notch in the demodulator tuned circuit. The sample-and-hold circuit is followed by an amplifier with high output impedance, therefore the steepness of the of the AFC control voltage is dependent on the load impedance.

QUICK REFERENCE DATA SYMBOL Supply VP IP Istart Video V8-9(RMS) G8-9 S/N V18(p-p) Sound V12(RMS) AMS THD Sync I27 V22 required sync pulse amplitude required input current during flyback pulse coincidence detector output voltage in synchronized condition in no signal condition V22 V22(p-p) vertical feedback for DC voltage vertical feedback for AC voltage (peak-to-peak value) note AF output signal (RMS value) AM suppression total harmonic distortion note mV IF sensitivity (RMS value) IF gain control range signal-to-noise ratio AFC output voltage swing (peak-to-peak value) input signal at 38.9 MHz; note positive supply voltage (pin 7) supply current (pin 7) start current (pin 11) note PARAMETER CONDITIONS MIN.

Notes to the quick reference data 1. Pin 11 has a double function. When during switch-on a current 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 output signal is measured = 7.5 kHz and maximum volume control. 4. The minimum value is obtained by connecting 1.8 k resistor and 470 nF capacitor in series between the video output and pin 25. The slicing level can be varied by changing the value of this resistor (higher resistance value results in a larger value of the minimum sync pulse amplitude). The slicing level is independent of the video information.


Related products with the same datasheet
Some Part number from the same manufacture Philips Semiconductors (Acquired by NXP)
TDA8305A Small Signal Combination ic For Colour TV
TDA8310 TDA8310; Pal/ntsc Colour Processor For Pip Applications
TDA8310A TDA8310A; Pal/ntsc Colour Processor For Pip Applications;; Package: SOT247-1 (SDIP52)
TDA8315T TDA8315T; Integrated NTSC Decoder And SYNC Processor
TDA8340 Television if Amplifier And Demodulato (tuner Agc Output For N-p-n Tuners)
TDA83401 Television if Amplifier And Demodulator
TDA8341 Television if Amplifier And Demodulato (tuner Agc Output For N-p-n Tuners)
TDA8349A Multistandard if Amplifier And Demodulator
TDA8350 TDA8350Q; Dc-coupled Vertical Deflection And East-west Output Circuit;; Package: SOT141-6 (DBS13P)
TDA8351 TDA8351; Dc-coupled Vertical Deflection Circuit;; Package: SOT131-2 (SIL9P)
TDA8351A Dc-coupled Vertical Deflection Output
TDA8351AQ Dc-coupled Vertical Deflection Output Circuit
TDA8354Q TDA8354Q; Full Bridge Current Driven Vertical Deflection Output Circuit in Lvdmos
TDA8356 TDA8356; Dc-coupled Vertical Deflection Circuit;; Package: SOT131-2 (SIL9P)
TDA8357J TDA8357J; Full Bridge Vertical Deflection Output Circuit in Lvdmos
TDA8358 TDA8358J; Full Bridge Vertical Deflection Output Circuit in Lvdmos With East-west Amplifier;; Package: SOT141-6 (DBS13P)
TDA8359J TDA8359J; Full Bridge Vertical Deflection Output Circuit in Lvdmos
TDA8360 TDA8360; TDA8361; TDA8362; Integrated Pal And Pal/ntsc TV Processors
TDA8366 TDA8366; I²C-bus Controlled Pal/ntsc TV Processor
TDA836x Integrated Pal And Pal/ntsc TV Processors

74LVC74AD : 74LVC74A; Dual D-type Flip-flop With Set And Reset; Positive-edge Trigger;; Package: SOT762-1 (DHVQFN14)

74LVT162374 : D-Type Flip-Flops 3.3 V LVT 16-bit Edge-triggered D-type Flip-flop With 30 Ohm Termination Resistors (3-State)

BFR505T : BFR505T; NPN 9 GHZ Wideband Transistor;; Package: SOT416 (EMT3, SMPAK)

BZV49-C3V3 : BZV49 Series; Voltage Regulator Diodes

BZX384-C62 : BZX384 Series; Voltage Regulator Diodes

N74F723AN : Quad 2-to-1 Data Selector Multiplexer 3-state

PCF8582E-2 : Pcf8582/pcf8581

TDA4866 : Amplifier Deflection TDA4866; Full Bridge Current Driven Vertical Deflection Booster;; Package: SOT131-2 (SIL9P)

TDA8376A : Encoder/Decoder TDA8376; TDA8376A; I²C-bus Controlled Pal/ntsc TV Processors

TZA1033HL : TZA1033HL; High Speed Advanced Analog DVD Signal Processor And Laser Supply

UBA2050T : UBA2050(A); UBA2051(A;C); One-chip Telephone Ics With Speech, Dialler And Ringer Functions

TFA9881UK : 3.4 W PDM Input Class-D Audio Amplifier The TFA9881 is a mono, filter-free class-D audio amplifier in a 9-bump WLCSP (Wafer Level Chip-Size Package) with a 400 m pitch. The digital input interface is an over-sampled Pulse Density Modulated (PDM) bit stream. The TFA9881 receives audio and control

0-C     D-L     M-R     S-Z