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| INTEGRATED CIRCUITS DATA SHEET TDA4884 Three gain control video pre-amplifier for OSD Product specification Supersedes data of June 1994 File under Integrated Circuits, IC02 1997 Nov 26 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD CONTENTS 1 2 3 4 5 6 7 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 8 9 10 11 11.1 12 13 14 14.1 14.2 14.3 15 16 FEATURES GENERAL DESCRIPTION QUICK REFERENCE DATA ORDERING INFORMATION BLOCK DIAGRAM PINNING FUNCTIONAL DESCRIPTION Contrast control Output stages Input clamping Vertical blanking Horizontal blanking Cut-off and black-level stabilization On screen display Test mode LIMITING VALUES THERMAL CHARACTERISTICS CHARACTERISTICS APPLICATION AND TEST INFORMATION Recommendations for building the application board INTERNAL PIN CONFIGURATION PACKAGE OUTLINE SOLDERING Introduction Soldering by dipping or by wave Repairing soldered joints DEFINITIONS LIFE SUPPORT APPLICATIONS TDA4884 1997 Nov 26 2 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD 1 FEATURES 2 GENERAL DESCRIPTION TDA4884 * 85 MHz video controller * Fully DC controllable * 3 separate video channels * Input black-level clamping * White level adjustment for 3 channels * Contrast control for all 3 channels simultaneously * Cathode feedback to internal reference for cut-off control, which allows unstabilized video supply voltage * Current outputs for RGB signal currents * RGB voltage outputs to external peaking circuits * Blanking and switch-off input for screen protection * Sync on green operation possible * On Screen Display (OSD) facility. 3 QUICK REFERENCE DATA SYMBOL VP IP Vi(b-w) Vo(b-w) Io(b-w) B Gnom G CRcontrast COSD(min) Tamb 4 PARAMETER positive supply voltage supply current input voltage (black-to-white; pins 2, 5 and 8) output voltage (black-to-white; pins 19, 16 and 13) output current (black-to-white; pins 20, 17 and 14) bandwidth nominal gain (pins 2, 5 and 8 to pins 19, 16 and 13) gain control difference for all channels contrast control minimum contrast for OSD operating ambient temperature The TDA4884 is an RGB pre-amplifier for colour monitor systems with SVGA performance, intended for DC or AC coupling of the colour signals to the cathodes of the CRT. With special advantages the circuit can be used in conjunction with the TDA485x monitor deflection IC family. CONDITIONS MIN. 7.2 36 - TYP. 8.0 48 0.7 0.79 50 - 85 1 - - -40 - MAX. 8.8 60 1.0 - - 100 - - +2.6 +3.4 - +70 UNIT V mA V V mA mA MHz dB dB dB dB C nominal contrast; pins 3, 1 and 11 open-circuit with peaking -3 dB nominal contrast; pins 3, 1 and 11 open-circuit relative to Gnom Vi(CC) = 1 to 6 V Vi(CC) = 0.7 V - - - 70 - -5 -22 - -20 ORDERING INFORMATION TYPE NUMBER PACKAGE NAME DIP20 DESCRIPTION plastic dual in-line package; 20 leads (300 mil) VERSION SOT146-1 TDA4884 1997 Nov 26 3 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD 5 BLOCK DIAGRAM TDA4884 handbook, full pagewidth VP = 8 V VP 10 k 1 gain control VOLTAGE CONVERTER 6.2 V TDA4884 20 current output 1.5 k VCRT = 75 V signal input 75 22 nF 2 CLAMP CLIPPING BAV21 voltage output 33 33 BFQ235 8V 10 k cut-off control 220 10 M 19 VP 10 k gain control 3 VOLTAGE CONVERTER 18 feedback 68 k CHANNEL 1 15 k 6.8 k 4 1.5 k current 17 output 22 nF 5 CLAMP CLIPPING voltage 16 output 33 REF GAIN CHANNEL 2 VP 10 k 6 contrast control VOLTAGE CONVERTER 15 feedback BFQ256 33 10 k 15 k 6.8 k cut-off control 60 MHz VCRT = 75 V BFQ236 BAV21 10 1 k BFQ235 10 68 k 8V 220 25 MHz signal input 75 10 M 40 MHz CRT VP 7 + current 14 output 860 VCRT = 65 V signal input 75 22 nF BFQ236 BAV21 10 8 CLAMP CLIPPING voltage 13 output 18 10 M BFQ235 1 k 10 47 nF 100 18 VCRT2 = 65 V 9 horizontal blanking switch off VOLTAGE CONVERTER input clamping BFQ256 CHANNEL 3 test mode ultra black blanking 10 clamping pulse vertical blanking test mode PULSE DECODER output clamping MHA917 93 k 12 feedback 10 k 10 k cut-off control 5.8 V 11 10 k VP gain control Fig.1 Block diagram and basic application circuit for DC and AC coupling. 1997 Nov 26 4 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD 6 PINNING SYMBOL GC2 VIN1 GC1 GND VIN2 CC VP VIN3 HBL CL GC3 FB3 VOUT3 IOUT3 FB2 VOUT2 IOUT2 FB1 VOUT1 IOUT1 7 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DESCRIPTION gain control channel 2 signal input channel 1 gain control channel 1 ground signal input channel 2 contrast control, OSD switch supply voltage signal input channel 3 horizontal blanking, switch-off input clamping, vertical blanking, test mode gain control channel 3 feedback channel 3 voltage output channel 3 current output channel 3 feedback channel 2 voltage output channel 2 current output channel 2 feedback channel 1 voltage output channel 1 current output channel 1 7.2 Fig.2 Pin configuration. handbook, halfpage TDA4884 GC2 1 VIN1 2 GC1 3 GND 4 VIN2 5 20 IOUT1 19 VOUT1 18 FB1 17 IOUT2 16 VOUT2 TDA4884 CC 6 VP 7 VIN3 8 HBL 9 CL 10 MHA918 15 FB2 14 IOUT3 13 VOUT3 12 FB3 11 GC3 FUNCTIONAL DESCRIPTION Output stages The RGB input signals 0.7 V (p-p) are capacitively coupled into the TDA4884 (pins 2, 5 and 8) from a low ohmic source and are clamped to an internal DC voltage (artificial black level). Composite signals will not disturb normal operations because an internal clipping circuit cuts all signal parts below black level. All channels have a maximum total voltage gain of 7 dB (maximum contrast and maximum individual channel gain). With the nominal channel gain of 1 dB and nominal contrast setting the nominal black-to-white output amplitude is 0.79 V (p-p). DC voltages are used for contrast and gain control. 7.1 Contrast control Each output stage provides a current output (pins 20, 17 and 14) and a voltage output (pins 19, 16 and 13). External cascode transistors reduce power consumption of the IC and prevent breakdown of the output transistors. Signal output currents and peaking characteristics are determined by external components at the voltage outputs and the video supply. The channels have separate internal feedback loops which ensure large signal linearity and marginal signal distortion irrespective of output transistor thermal VBE variation. 7.3 Input clamping Contrast control is achieved by a voltage at pin 6 and affects the three channels simultaneously. To provide the correct white point, an individual gain control (pins 3, 1 and 11) adjusts the signals of channels 1, 2 and 3. The clamping pulse (pin 10) is used for input clamping only. The input signals have to be at black level during the clamping pulse and are clamped to an internal artificial black level. The coupling capacitors are used in this way for black-level storage. Because the threshold for the clamping pulse is higher than that for vertical blanking (pin 10) the rise and fall times of the clamping pulse need 1997 Nov 26 5 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD to be faster than 75 ns/V during transition from 1 to 3.5 V. 7.4 Vertical blanking 7.6 TDA4884 Cut-off and black-level stabilization The vertical blanking pulse will be detected if the input voltage (pin 10) is higher than the threshold voltage for approximately 320 ns but does not exceed the threshold for the clamping pulse in the time between. During the vertical blanking pulse the input clamping is disabled to avoid misclamping in the event of composite input signals. The input signal is blanked and the artificial black level is inserted instead, thus the output signal is at reference black level. The DC value of the reference black level will be adjusted by cut-off stabilization (see below). 7.5 Horizontal blanking For cut-off stabilization (DC coupling to the CRT) and black-level stabilization (AC coupling) the video signal at the cathode or the coupling capacitor is divided by an adjustable voltage divider and fed to the feedback inputs (pins 18, 15 and 12). During horizontal blanking time this signal is compared with an internal DC voltage of approximately 5.8 V. Any difference will lead to a reference black-level correction by charging or discharging the integrated capacitor which stores the reference black-level information between the horizontal blanking pulses. 7.7 On screen display During horizontal blanking (pin 9) the output signal is set to reference black level and output clamping is activated. If the voltage at pin 9 exceeds the switch-off threshold, the signal is blanked and switched to ultra-black level for screen protection and spot suppression during V-flyback. Ultra-black level is the lowest possible output voltage (at voltage outputs) and is not dependent on cut-off stabilization. For OSD fast switching of control pin 6 to less than 1 V (e.g. 0.7 V) blanks the input signals. The OSD signals can easily be inserted to the external cascode transistor (see Fig.3). 7.8 Test mode During test mode (pins 9 and 10 connected to VP) the black levels at the voltage outputs (pins 19, 16 and 13) are set internally to typical 0.5 V, 3 V DC at signal inputs (pins 2, 5 and 8). handbook, full pagewidth 20 channel 1 17 channel 2 TDA4884 contrast BFQ235 6 14 100 pF OSD fast blanking 1 k 4.7 k PH2222 150 depending on channel gain 1 k to 10 k MHA919 current output PH2222 channel 3 220 OSD signal input Fig.3 OSD application. 1997 Nov 26 6 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD 8 LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL Vext PARAMETER external DC voltage applied to the following pins: pin 7 (supply voltage) pins 2, 5 and 8 (signal input) pins 20, 17 and 14 (current outputs) pins 1, 3, 6 and 11 (gain and contrast control) pin 9 (horizontal blanking input) pin 10 (input clamping input) Io(av) IOM Ptot Tstg Tamb Tj VESD Notes average output current (pins 20, 17 and 14) peak output current (pins 20, 17 and 14) total power dissipation storage temperature operating ambient temperature junction temperature electrostatic handling for all pins note 2 note 1 0 -0.1 -0.1 -0.1 -0.1 -0.1 0 0 - -25 -20 -25 -500 8.8 VP VP VP CONDITIONS MIN. TDA4884 MAX. V V V V V V UNIT VP + 0.7 VP + 0.7 50 100 1200 +150 +70 +150 +500 mA mA mW C C C V 1. Signal amplitude of 50 mA black-to-white is possible if the average current (including blanking times and signal variation against time) does not exceed 50 mA. The maximum power dissipation of 1200 mW has to be considered. 2. Equivalent to discharging a 200 pF capacitor through a 0 series resistor. 9 THERMAL CHARACTERISTICS SYMBOL Rth(j-a) PARAMETER thermal resistance from junction to ambient CONDITIONS in free air VALUE 65 UNIT K/W 1997 Nov 26 7 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD TDA4884 10 CHARACTERISTICS VP = 8.0 V; Tamb = 25 C; all voltages measured with respect to GND (pin 4); unless otherwise specified. SYMBOL VP IP Vi(b-w) VI(clamp) II PARAMETER supply voltage (pin 7) supply current (pin 7) CONDITIONS MIN. 7.2 36 - note 1 no clamping; VI = VI(clamp); Tamb = -20 to +70 C during clamping; VI = VI(clamp) + 0.7 V during clamping; VI = VI(clamp) - 0.7 V Contrast control (pin 6); note 2 Vi(CC) Vi(CC)(max) Vi(CC)(nom) Ii(CC) COSD(min) C -----------C nom input voltage maximum input voltage input voltage for nominal contrast input current minimum contrast for OSD contrast relative to nominal contrast note 3 Vi(CC) = 4.3 V Vi(CC) = 0.7 V Vi(CC) = 6.0 V; pins 3, 1 and 11 open-circuit Vi(CC) = 1.0 V; pins 3, 1 and 11 open-circuit Vi(CC)(min) Gtrack tdf(C) tracking of output signals of channels 1, 2 and 3 delay between leading (falling) edges of contrast voltage and voltage output waveforms delay between trailing edges (rising) of contrast voltage and voltage output waveforms fall time of voltage output waveform rise time of voltage output waveform 1 V < Vi(CC) < 6 V; note 4 Vi(CC) = 4.3 V to 0.7 V; input fall time at pin 6: tf(CC) = 2 ns; note 5; Fig.7 Vi(CC) = 0.7 V to 4.3 V; input rise time at pin 6: tr(CC) = 2 ns; note 5; Fig.7 90% to 10% amplitude; input fall time at pin 6: tf(CC) = 2 ns; note 5; Fig.7 10% to 90% amplitude; input rise time at pin 6: tr(CC) = 2 ns; note 5; Fig.7 1.0 - - -5 - 2.4 -26 - - 4.3 -1 -40 3.4 -22 0.7 0 7 6.0 VP - 1 - -0.1 - - -19 - 0.5 20 V V V A dB dB dB V dB ns 2.8 -0.05 50 -50 TYP. 8.0 48 MAX. 8.8 60 UNIT V mA Video signal inputs (pins 2, 5 and 8) input voltage (black-to-white value; pins 2, 5 and 8) DC voltage during input clamping (artificial black + VBE) DC input current 0.7 3.1 +0.05 75 -75 1.0 3.4 V V +0.250 A 120 -120 A A input voltage for minimum contrast pins 3, 1 and 11 open-circuit - - - tdr(C) - 15 25 ns tf(C) - 6 15 ns tr(C) - 6 15 ns 1997 Nov 26 8 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD TDA4884 SYMBOL PARAMETER CONDITIONS MIN. - TYP. MAX. UNIT Gain control (pins 3, 1 and 11); note 6 Vi(GC) Vi(GC)(nom) Ri(GC) G input voltage input voltage for nominal gain input resistance gain control difference relative to nominal gain Vi(CC) = 4.3 V; Vi(GC) = 6 V Vi(CC) = 4.3 V; Vi(GC) = 1 V 1.0 pins 3, 1 and 11 open-circuit 3.6 44 2 -5.5 6.0 3.95 66 3.3 -4.5 V V k dB dB 3.75 55 2.6 -5 Feedback input (pins 18, 15 and 12); note 7 Vref(int) IO(FB)(max) Vbl(CRT) Vref(T) Vref(VP) internal reference voltage maximum output current black-level variation at CRT variation of Vref(int) in the temperature range variation of Vref(int) with supply voltage during output clamping; Vi(FB) = 3 V note 8 Tamb = -20 to +70 C 7.2 V VP 8.8 V 5.6 -500 0 0 0 5.8 -100 40 20 60 6.1 -60 200 50 100 V nA mV mV mV Voltage outputs (pins 19, 16 and 13); note 1 Vo(b-w)(nom) nominal signal output voltage (black-to-white value) maximum adjustable black-level voltage black-level voltage during switch-off, equal to minimum adjustable black-level voltage black-level voltage during test mode nominal gain (pins 2, 5 and 8 to pins 19, 16 and 13) bandwidth signal-to-noise ratio output thermal distortion black-level variation between clamping pulses maximum offset during sync clipping variation of nominal output signal (black-to-white value) with temperature pins 3, 1 and 11 open-circuit; Vi(CC) = 4.3 V; Vi(b-w) = 0.7 V during output clamping; Tamb = -20 to +70 C Vi(HBL) = VP; RO = 33 ; Tamb = -20 to +70 C Vi(HBL) = VP; Vi(CL) = VP; pin 1 open-circuit; Vi = VI(clamp); note 9 nominal contrast; pins 3, 1 and 11 open-circuit -3 dB note 10 Io(b-w) = 50 mA; note 11 line frequency = 30 kHz Vi < VI(clamp); note 12 pins 3, 1 and 11 open-circuit; Vi(CC) = 4.3 V; Vi(b-w) = 0.7 V; Tamb = -20 to +70 C 0.69 0.79 0.89 V Vblx(max) Vbl(SO) 1 30 1.2 45 1.4 100 V mV Vbl(TST) 0.3 0.7 1.2 V Gnom B S/N dO(th) Vbl(fl) Voffset(max) Vo(b-w)(T) - 70 - - - 0 0 1 85 50 0.6 0.5 7 2.5 - - 44 1 4.5 15 10 dB MHz dB % mV mV % 1997 Nov 26 9 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD TDA4884 SYMBOL PARAMETER CONDITIONS - with peaking Io = 50 mA Io = 100 mA Vi(HBL) = VP; RO = 33 70 MHz; single channel - - - 0 - - - MIN. TYP. MAX. - 100 2.0 2.2 900 UNIT Current outputs (pins 20, 17 and 14); note 13 Io(b-w) V20-19; V17-16; V14-13 Ibl(SO) G(f) tr(O) dVO output current (black-to-white value) start of HF-saturation voltage of output transistors output current during switch-off 50 - - - 20 mA mA V V A Frequency response at voltage outputs; note 14 gain decrease by frequency response at pins 19, 16 and 13 1.3 4.1 4 3 5.0 8 dB ns % rise time at voltage output (pins 19, 10% to 90% amplitude; 16 and 13) input rise time = 1 ns overshoot of output signal pulse related to actual output pulse amplitude single channel; input rise time = 2.5 ns; Vi(b-w) = 0.7 V; Vi(CC) = 4.3 V; pins 3, 1 and 11 open-circuit Crosstalk at voltage outputs with speed up circuit; note 15 cr(tr) Vi(HBL) transient crosstalk - - -20 dB Threshold voltages for clamping, blanking and switch-off (pins 9 and 10); note 16 input voltage at pin HBL threshold for horizontal blanking (blanking, output clamping) threshold for switch-off (blanking, minimum black level, no output clamping) Ri(HBL) Vi(CL) input resistance input voltage at pin CL threshold for vertical blanking (blanking, no input clamping) threshold for clamping (input clamping, no blanking) threshold for test mode (no clamping, no blanking, for Vbl(TST) see above) Ii(CL) tr(CL) tf(CL) tw(clamp) current rise time for clamping pulse fall time for clamping pulse width of clamping pulse note 17 note 17 for test mode also Vi(HBL) > 6.8 V (switch-off) Vi(CL) < VP - 1 V Vi(CL) VP - 1 V note 17 note 17 1.2 2.6 VP - 1 1.4 3.0 - 1.6 3.5 VP V V V against ground 1.2 5.8 1.4 6.5 1.6 6.8 V V 50 80 110 k -3 - - - 0.6 -1 100 - - - - - 75 75 - A A ns/V ns/V s 1997 Nov 26 10 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD Notes to the characteristics 1. Definition of levels: TDA4884 a) Artificial black level: internal signal level behind input emitter follower during input clamping and signal clipping. This level is inserted instead of the input signal during blanking. b) Reference black level: DC voltage during output clamping at voltage outputs, not influenced by contrast or gain setting, adjustable by cut-off stabilization. c) Cut-off level: corresponding DC voltage at CRT cathode in closed feedback loop. d) Black level: actual signal black level at either voltage outputs or cathode. At voltage outputs the black level is equal to reference black level because there is no brightness control via TDA4884. At cathode the black level is equal to cut-off level. Brightness can be adjusted via grid 1. e) Ultra-black level, switch-off level: lowest adjustable reference black level, lowest signal level at voltage outputs. f) The minimum guaranteed control range for reference black level is 0.1 to 1 V. The ultra-black level is dependant on the external resistor RO at pins 13, 16 and 19 (voltage outputs) to ground. RO g) V bl ( SO ) ------------------------------- x 4.65 V 3.5 k + R O h) Signal processing see Fig.4. 2. Linear control range is 1 to 6 V for Vi(CC), independent of supply voltage. Open pin 6 leads to absolute maximum contrast setting. It is recommended not to exceed Vi(CC) = VP - 1 V to avoid saturation of internal circuitry. For Vi(CC) < Vi(CC)(min) 0.7 V a small negative signal ( -40 dB) will appear. For frequency dependency of contrast control see note 14. Typical contrast characteristic see Fig.5. 3. Definition for nominal output signals: input Vi(b-w) = 0.7 V, gain pins 3, 1 and 11 open-circuit, contrast control Vi(CC) = Vi(CC)(nom). 4. A 1 A 20 A 1 A 30 A 2 A 30 G track = 20 x maximum of log -------- x -------- ; log -------- x -------- ; log -------- x -------- dB A 10 A 2 A 10 A 3 A 20 A 3 Ax: signal output amplitude in channel x at any contrast setting between 1 and 6 V. Ax0: signal output amplitude in channel x at nominal contrast and same gain setting. 5. Typical step in contrast voltage and response at signal outputs for nominal input signal Vi(b-w) = 0.7 V. Typical OSD fast blanking input/output see Fig.7. 6. Linear control range is 1 to 6 V for Vi(GC), independent of supply voltage. Typical gain characteristic see Fig.6. 7. The internal reference voltage can be measured at pins 18, 15 and 12 during output clamping (Vi(HBL) = 2 V) in closed feedback loop. Typical variation of Vref(int) with temperature and power supply voltage see Fig.8. 8. Slow variations of video supply voltage VCRT (see Fig.1) will be suppressed at CRT cathode by cut-off stabilization. Change of VCRT by 5 V leads to specified change of cut-off voltage. 9. The test mode allows testing without input and output clamping pulses. The signal inputs (pins 2, 5 and 8) have to be biased via resistors to the previously measured clamp voltages of approximately 3 V (artificial black level + VBE). Signal blanking is not possible during test mode. 10. The signal-to-noise ratio is calculated by the formula (frequency range 1 to 70 MHz): peak-to-peak value of the nominal signal output voltage S --- = 20 x log -------------------------------------------------------------------------------------------------------------------------------------------------- dB RMS value of the noise output voltage N 11. Large output swing e.g. Io(b-w) = 50 mA leeds to signal depending power dissipation in output transistors. Thermal VBE variation is compensated. 12. Composite signals will not disturb normal operations because an internal clipping circuit cuts all signal parts below black level. Typical sync clipping see Fig.10. 1997 Nov 26 11 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD TDA4884 1 1 13. The output current approximately follows the equation I o = V o ------- + ----------------- - 500 A for Vo > Vbl(SO) and with R O 2.2 k RO = external resistor at voltage output to ground. The external RC combination at pins 19, 16 and 13 (see Fig.1) enables peak currents during transients. 14. Frequency response, crosstalk and pulse response have been measured at voltage outputs in a special printed-circuit board with 50 line in/out connections and without peaking (see Chapter "Application and test information"). Typical frequency response see Fig.9, typical pulse response see Fig.11 and typical characteristic of contrast control as a function of frequency see Fig.12. 15. Crosstalk between any two output pins (e.g. channels 1 and 2): a) Input conditions: one channel (channel 1) with nominal input signal and minimum rise time. The inputs of the other channels capacitively coupled to ground (channels 2 and 3). Gain pins 3, 1 and 11 open-circuit. b) Output conditions: output signal of channel 1 is set by contrast control voltage (pin 6) to Vo(b-w) = Vo(VOUT1) = 0.7 V, the rise time should be 5 ns. Output signal of channel 2 then is Vo(b-w) = Vo(VOUT2). V o(VOUT2) c) Transient crosstalk: cr ( tr ) = 20 x log ----------------------- dB V o(VOUT1) d) Crosstalk as a function of frequency has been measured without peaking circuit, with nominal input signal and nominal settings. Typical frequency dependent crosstalk between channels see Figs 13, 14 and 15. 16. The internal threshold voltages are derived from a stabilized voltage. The internal pulses are generated while the input pulses are higher than the thresholds. Voltages less than -0.1 V at pins 9 and 10 can influence black-level control and should be avoided. 17. For 75 ns/V < tr(CL), tf(CL) < 240 ns/V, generation of internal input clamping and blanking pulse is not defined. Pulses not exceeding the threshold of input clamping (typical 3 V) will be detected as blanking pulse. Timing of pulses at pin 10 see Fig.16. 1997 Nov 26 12 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD TDA4884 input handbook, full pagewidth signals input signal at pins 2, 5 and 8 with sync (on green) video signal black level equal to artificial black level + VBE by input clamping (approximately 3 V) input clamping pulse at pin 10 horizontal blanking and output clamping pulse at pin 9 video portion horizontal flyback and output clamping black level equal to artificial black level by input clamping and storage by coupling capacitor inserted artificial black level internal signal behind input stage sync clipping to artificial black level output signals (pins 19, 16 and 13) at nominal gain and maximum brightness setting and maximum/nominal/ minimum contrast setting max nom min reference black level max nom at nominal contrast and maximum/nominal/ minimum gain setting min reference black level ultra black level ground signal at CRT cathode high tension supply voltage (e.g. 90 V) black level at nominal gain and contrast setting (brightness setting as well as horizontal blanking via grid 1) MHA920 Fig.4 Signal processing. 1997 Nov 26 13 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD TDA4884 handbook, halfpage 1400 MHA819 signal amplitude (mV) 1000 800 600 400 200 0 -200 4 3 2 handbook, halfpage 1200 MHA821 3 (dB) 2 1 0 -1 -2 -3 -4 -5 -6 -8 (dB) signal amplitude (mV) 800 1 0 -1 -3 -5 -10 -20 -40 400 0 0 0.7 2 4 4.3 6 Vi(CC) (V) 8 0 2 4 3.75 6 Vi(GC) (V) 8 Fig.5 Typical contrast characteristic. Fig.6 Typical gain characteristic. handbook, full pagewidth OSD pulse at pin 6 (V) 4.3 tf(CC) tr(CC) 90% 50% 0.7 t output signal at pins 19, 16 and 13 (V) Vbl + Vo(b-w) = 1.5 Vo(b-w) Vbl = 0.7 t tf(C) tr(C) tdf(C) tdr(C) 10% 90% 50% 10% MHA820 Fig.7 Typical OSD fast blanking input/output waveforms. 1997 Nov 26 14 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD TDA4884 handbook, halfpage 5.85 MHA822 5.84 Vref(int) (V) 5.83 5.82 5.81 5.80 5.79 5.78 VP = 8.8 V 8.0 V 7.2 V 5.77 5.76 5.75 -20 0 20 40 60 80 100 Tamb (C) Conditions: 0.5 V reference black level, no signal. Fig.8 Typical variation of Vref(int) with temperature and supply voltage. handbook, full pagewidth 3 MHA824 signal (dB) 0 -3 -6 -9 -12 -15 1 10 102 f (MHz) 103 Solid line: single channel. Dotted line: white signal. Fig.9 Typical frequency response. 1997 Nov 26 15 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD TDA4884 handbook, full pagewidth input signal output signal Voffset(max) MHA823 Fig.10 Typical sync clipping. handbook, full pagewidth 800 input pulse (mV) 600 90% MHA825 400 tr 2.5 ns 200 10% 0 tf 2.5 ns 1000 output pulse (mV) 800 90% 600 400 tr 4.4 ns 200 10% 0 tf 4.8 ns -200 Solid line: single channel. Dotted line: white pattern. 0 20 40 60 80 t (ns) 100 Fig.11 Typical pulse responses. 1997 Nov 26 16 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD TDA4884 handbook, full pagewidth 10 MHA826 signal (dB) 0 Vi(CC) = 7V 6V 5V 4V 3V -10 2V -20 1V Vi(CC) = 0.7 V -30 Vi(CC) = 0.7 V 1 10 70 102 120 f (MHz) 103 Solid lines: single channel. Dotted lines: white signal. Fig.12 Typical characteristic of contrast control as a function of frequency. MHA926 handbook, full pagewidth 0 signal (dB) -10 (1) -20 (2) -30 (3) -40 102 103 1 (1) Channel 1. (2) Channel 2. (3) Channel 3. 10 f (MHz) Fig.13 Typical crosstalk: channel 1 2 and 3. 1997 Nov 26 17 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD TDA4884 MHA925 handbook, full pagewidth 0 signal (dB) (1) -10 -20 (2) -30 (3) -40 102 103 1 (1) Channel 2. (2) Channel 3. (3) Channel 1. 10 f (MHz) Fig.14 Typical crosstalk: channel 2 1 and 3. MHA924 handbook, full pagewidth 0 signal (dB) -10 (1) -20 (2) -30 (3) -40 102 103 1 (1) Channel 3. (2) Channel 1. (3) Channel 2. 10 f (MHz) Fig.15 Typical crosstalk: channel 3 1 and 2. 1997 Nov 26 18 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD TDA4884 handbook, full pagewidth 3V Vi(CL) 1.4 V internal pulses input clamping tr(CL) tf(CL) no clamping td(Vblank) >240 ns/V t 1/2 td(Vblank) no clamping t blanking t MHA916 Fig.16 Timing of pulses at pin 10. 1997 Nov 26 19 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD 11 APPLICATION AND TEST INFORMATION For high frequency measurements and special application, a printed-circuit board with only a few external components is built. Figure 17 shows the application circuit and Fig.18 the layout of the double sided printed board. All components on the underside and R13, R14 and R15 on the top are SMD types. Short HF loops and minimum crosstalk between the channels as well as input and output are achieved by properly shaped ground areas star connected to the IC ground pin. The HF input signal can be fed to the subclick connectors P1, P2 and P3 by a 50 line. The line is then terminated by a 51 resistor on the board. With choice of jumper connections (J1, J2 and J3) it is possible to connect channel inputs to its input connector, to connect all channels to one input connector (white pattern) and to ground each input via the coupling capacitor. For operation without input clamping (e.g. test mode) the DC bias can be provided by VIDC (connector P21) if a short-circuit at J4, J5 and J6 is made (solder short or low-value SMD resistor). The output signal can be monitored via 50 terminated lines at the voltage outputs (subclick connectors P4, P5 and P6). With 100 in parallel to the 50 terminated line the effective load resistance at the voltage outputs is 33 . The mismatch seen from the line towards the IC has no significant effect if the line is match terminated. A peaking circuit (C15, R16 for channel 1, C16, R17 for channel 2 and C17, R18 for channel 3) can be added for realistic loading of the voltage outputs. Black-level adjustment is made by VIOS, VFBX (external voltages at connector P21) and resistors R19, R22 and R25 for channel 1 (channel 2: R20, R23 and R26; channel 3: R21, R24 and R27). If R19 is equal to the effective load resistor at the voltage output the reference black level (Vref(bl)) is approximately: R22 V ref(bl) = VIOS - V ref(int) - ( V ref(int) - VFBX ) x ---------R25 Vref(int) is the internal reference voltage at the feedback input (typical 5.8 V). By this it is possible to adjust the reference black level and the voltage at the current outputs independently. TDA4884 DC control for contrast and gain is provided at connectors P21 and P22. Contrast control can also be set by the potentiometer R28 (jumper J11). The series resistor R11 is necessary if fast OSD switching is activated via 50 line (P10), a line termination can be provided at the connector P9. Clamping and blanking pulses are fed to the IC via connectors P7 and P8. Connector P23 is used for power supply. The capacitors C7 and C8 should be located as near as possible to the IC pins. 11.1 Recommendations for building the application board * General - Double-sided board - Short HF loops by large ground plane on the rear. * Voltage outputs - Capacitive loads as small as possible - Short interconnection via resistor to ground. * Supply voltage - Capacitors as near as possible to the pins - Use of high-frequency capacitors (low self inductance, e.g. SMD). * Current outputs, emitter of cascode transistors The external interconnection inductance can build a resonance together with the internal substrate capacitance. A damping resistor of 10 to 30 near to the IC pin can suppress such oscillations. 1997 Nov 26 20 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD TDA4884 subclick handbook, full pagewidth connector (50 ) solder point for short-circuiting or SMD 0 resistor jumper connector P21 C30 220 F (25 V) R7 C4 100 nF GC2 C5 22 nF Vi(b-w) P1 R1 51 J1 C1 22 nF J4 R4 5.1 k GC1 C12 22 nF C6 22 nF 3 18 110 IC1 1 IOUT1 20 R19 33 C21 22 nF C24 100 nF C29 2.2 F C28 100 nF C27 22 nF GND (sense) GC2 GC1 VIDC VFBX VIOS (multi-layer) VIN1 VOUT1 2 19 C15 47 pF FB1 R13 100 P4 R22 3 k R25 9.1 k C18 22 nF R16 33 GND 4 17 IOUT2 R20 33 C22 22 nF C25 100 nF Vi(b-w) P2 J2 C2 22 nF J5 R5 5.1 k C13 22 nF VIN2 VOUT2 5 16 C16 47 pF FB2 R14 100 P5 R23 3 k R26 9.1 k C19 22 nF R2 51 TDA4884 CC 6 15 R17 33 VP C8 100 nF C7 1 nF VIN3 J6 R3 51 R6 5.1 k C14 22 nF 7 14 IOUT3 R21 33 C23 22 nF C26 100 nF Vi(b-w) P3 J3 C3 22 nF VOUT3 8 13 C17 47 pF R15 100 P6 R24 3 k R27 9.1 k C20 22 nF P22 R18 33 HBL 9 12 FB3 CL GC3 10 11 C11 22 nF GC3 CC C10 100 nF R8 1 k P7 P23 HBL P8 CL GND (power) VP P9 OSD P10 MHA921 R9 1 k L1 100 H R10 1 k C31 10 F C9 100 nF R12 R11 1 k J10 J11 1 k R28 10 k VP (sense) GND (sense) Fig.17 Application circuit for test PCB. 1997 Nov 26 21 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD TDA4884 handbook, full pagewidth C30 C29 P22 J11 J10 R28 P4 P5 P6 P10 R13 R14 R15 C31 P9 L1 IC1 R7 P21 J1 J2 J3 P23 P8 P7 P1 P2 P3 R1 R2 R3 R8 R4 C12 C1 J4 C5 R22 C4 C6 C2 R5 C14 R6 C3 C13 J5 C8 R23 J6 C7 R24 R9 C9 C11 C17 R18 R27 R11 R12 R10 R19 C15 R25 R20 C16 R26 R21 R16 C21 C24 C18 C22 C25 C19 R17 C23 C26 C20 C28 C27 C10 MHA833 Fig.18 Double sided test PCB layout. 1997 Nov 26 22 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD 12 INTERNAL PIN CONFIGURATION TDA4884 handbook, full pagewidth 20 19 CL 18 17 16 CL 15 14 13 CL 12 11 TDA4884 CL CL CL + 1 2 3 4 5 6 7 8 9 10 MHA922 + pin diode protection on all pins except pins 4 and 7 pin zener diode protection at pin 7 Fig.19 Internal pin configuration. 1997 Nov 26 23 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD 13 PACKAGE OUTLINE DIP20: plastic dual in-line package; 20 leads (300 mil) TDA4884 SOT146-1 D seating plane ME A2 A L A1 c Z e b1 b 20 11 MH wM (e 1) pin 1 index E 1 10 0 5 scale 10 mm DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 4.2 0.17 A1 min. 0.51 0.020 A2 max. 3.2 0.13 b 1.73 1.30 0.068 0.051 b1 0.53 0.38 0.021 0.015 c 0.36 0.23 0.014 0.009 D (1) E (1) e 2.54 0.10 e1 7.62 0.30 L 3.60 3.05 0.14 0.12 ME 8.25 7.80 0.32 0.31 MH 10.0 8.3 0.39 0.33 w 0.254 0.01 Z (1) max. 2.0 0.078 26.92 26.54 1.060 1.045 6.40 6.22 0.25 0.24 Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT146-1 REFERENCES IEC JEDEC EIAJ SC603 EUROPEAN PROJECTION ISSUE DATE 92-11-17 95-05-24 1997 Nov 26 24 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD 14 SOLDERING 14.1 Introduction TDA4884 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). 14.2 Soldering by dipping or by wave 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. 14.3 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. 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. 15 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. 16 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. 1997 Nov 26 25 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD NOTES TDA4884 1997 Nov 26 26 Philips Semiconductors Product specification Three gain control video pre-amplifier for OSD NOTES TDA4884 1997 Nov 26 27 Philips Semiconductors - a worldwide company Argentina: see South America Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. +61 2 9805 4455, Fax. +61 2 9805 4466 Austria: Computerstr. 6, A-1101 WIEN, P.O. Box 213, Tel. +43 160 1010, Fax. +43 160 101 1210 Belarus: Hotel Minsk Business Center, Bld. 3, r. 1211, Volodarski Str. 6, 220050 MINSK, Tel. +375 172 200 733, Fax. +375 172 200 773 Belgium: see The Netherlands Brazil: see South America Bulgaria: Philips Bulgaria Ltd., Energoproject, 15th floor, 51 James Bourchier Blvd., 1407 SOFIA, Tel. +359 2 689 211, Fax. +359 2 689 102 Canada: PHILIPS SEMICONDUCTORS/COMPONENTS, Tel. +1 800 234 7381 China/Hong Kong: 501 Hong Kong Industrial Technology Centre, 72 Tat Chee Avenue, Kowloon Tong, HONG KONG, Tel. +852 2319 7888, Fax. +852 2319 7700 Colombia: see South America Czech Republic: see Austria Denmark: Prags Boulevard 80, PB 1919, DK-2300 COPENHAGEN S, Tel. +45 32 88 2636, Fax. +45 31 57 0044 Finland: Sinikalliontie 3, FIN-02630 ESPOO, Tel. +358 9 615800, Fax. +358 9 61580920 France: 51 Rue Carnot, BP317, 92156 SURESNES Cedex, Tel. +33 1 40 99 6161, Fax. +33 1 40 99 6427 Germany: Hammerbrookstrae 69, D-20097 HAMBURG, Tel. +49 40 23 53 60, Fax. +49 40 23 536 300 Greece: No. 15, 25th March Street, GR 17778 TAVROS/ATHENS, Tel. +30 1 4894 339/239, Fax. +30 1 4814 240 Hungary: see Austria India: Philips INDIA Ltd, Band Box Building, 2nd floor, 254-D, Dr. Annie Besant Road, Worli, MUMBAI 400 025, Tel. +91 22 493 8541, Fax. +91 22 493 0966 Indonesia: see Singapore Ireland: Newstead, Clonskeagh, DUBLIN 14, Tel. +353 1 7640 000, Fax. +353 1 7640 200 Israel: RAPAC Electronics, 7 Kehilat Saloniki St, PO Box 18053, TEL AVIV 61180, Tel. +972 3 645 0444, Fax. +972 3 649 1007 Italy: PHILIPS SEMICONDUCTORS, Piazza IV Novembre 3, 20124 MILANO, Tel. +39 2 6752 2531, Fax. +39 2 6752 2557 Japan: Philips Bldg 13-37, Kohnan 2-chome, Minato-ku, TOKYO 108, Tel. +81 3 3740 5130, Fax. +81 3 3740 5077 Korea: Philips House, 260-199 Itaewon-dong, Yongsan-ku, SEOUL, Tel. +82 2 709 1412, Fax. +82 2 709 1415 Malaysia: No. 76 Jalan Universiti, 46200 PETALING JAYA, SELANGOR, Tel. +60 3 750 5214, Fax. +60 3 757 4880 Mexico: 5900 Gateway East, Suite 200, EL PASO, TEXAS 79905, Tel. +9-5 800 234 7381 Middle East: see Italy Netherlands: Postbus 90050, 5600 PB EINDHOVEN, Bldg. VB, Tel. +31 40 27 82785, Fax. +31 40 27 88399 New Zealand: 2 Wagener Place, C.P.O. Box 1041, AUCKLAND, Tel. +64 9 849 4160, Fax. +64 9 849 7811 Norway: Box 1, Manglerud 0612, OSLO, Tel. +47 22 74 8000, Fax. +47 22 74 8341 Philippines: Philips Semiconductors Philippines Inc., 106 Valero St. Salcedo Village, P.O. Box 2108 MCC, MAKATI, Metro MANILA, Tel. +63 2 816 6380, Fax. +63 2 817 3474 Poland: Ul. Lukiska 10, PL 04-123 WARSZAWA, Tel. +48 22 612 2831, Fax. +48 22 612 2327 Portugal: see Spain Romania: see Italy Russia: Philips Russia, Ul. Usatcheva 35A, 119048 MOSCOW, Tel. +7 095 755 6918, Fax. +7 095 755 6919 Singapore: Lorong 1, Toa Payoh, SINGAPORE 1231, Tel. +65 350 2538, Fax. +65 251 6500 Slovakia: see Austria Slovenia: see Italy South Africa: S.A. PHILIPS Pty Ltd., 195-215 Main Road Martindale, 2092 JOHANNESBURG, P.O. Box 7430 Johannesburg 2000, Tel. +27 11 470 5911, Fax. +27 11 470 5494 South America: Al. Vicente Pinzon, 173, 6th floor, 04547-130 SAO PAULO, SP, Brazil, Tel. +55 11 821 2333, Fax. +55 11 821 2382 Spain: Balmes 22, 08007 BARCELONA, Tel. +34 3 301 6312, Fax. +34 3 301 4107 Sweden: Kottbygatan 7, Akalla, S-16485 STOCKHOLM, Tel. +46 8 632 2000, Fax. +46 8 632 2745 Switzerland: Allmendstrasse 140, CH-8027 ZURICH, Tel. +41 1 488 2686, Fax. +41 1 481 7730 Taiwan: Philips Semiconductors, 6F, No. 96, Chien Kuo N. Rd., Sec. 1, TAIPEI, Taiwan Tel. +886 2 2134 2865, Fax. +886 2 2134 2874 Thailand: PHILIPS ELECTRONICS (THAILAND) Ltd., 209/2 Sanpavuth-Bangna Road Prakanong, BANGKOK 10260, Tel. +66 2 745 4090, Fax. +66 2 398 0793 Turkey: Talatpasa Cad. No. 5, 80640 GULTEPE/ISTANBUL, Tel. +90 212 279 2770, Fax. +90 212 282 6707 Ukraine: PHILIPS UKRAINE, 4 Patrice Lumumba str., Building B, Floor 7, 252042 KIEV, Tel. +380 44 264 2776, Fax. +380 44 268 0461 United Kingdom: Philips Semiconductors Ltd., 276 Bath Road, Hayes, MIDDLESEX UB3 5BX, Tel. +44 181 730 5000, Fax. +44 181 754 8421 United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409, Tel. +1 800 234 7381 Uruguay: see South America Vietnam: see Singapore Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD, Tel. +381 11 625 344, Fax.+381 11 635 777 For all other countries apply to: Philips Semiconductors, International Marketing & Sales Communications, Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825 (c) Philips Electronics N.V. 1997 Internet: http://www.semiconductors.philips.com SCA56 All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Printed in The Netherlands 547047/1200/03/pp28 Date of release: 1997 Nov 26 Document order number: 9397 750 02292 |
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