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U4462B-B preliminary information telefunken semiconductors rev. a1, 30-jan-97 1 (13) if 1-chip processor (video if and mono fm sound if) description the u4462b is a a video/sound if concept for tv-if signal processing. the circuit processes all video if sig- nals with negative modulation and fm sound if signals (mono fm intercarrier sound). with 5 v supply voltage, the u4462b is suitable for tv, vcr and multimedia ap- plications. features 5 v supply voltage; low power consumption minimum number of external components active carrier generation by fpll principle (frequency-phase-locked-loop) for true synchronous demodulation very linear video demodulation, excellent pulse response and good intermodulation figures vco circuit is operating on picture carrier frequency alignment-free afc without external reference circuit vif-agc with peak sync detection tuner agc with adjustable take-over point completely alignment-free pll demodulator for fm-intercarrier sound if signals (mono) ordering information extended type number package remarks u4462bbsd sdip28 u4462bbflg3 so28 delivery in taped form
U4462B-B telefunken semiconductors rev. a1, 30-jan-97 preliminary information 2 (13) block diagram ?? ?? ?? ?? ? ? agc (vif) tuner agc ?? ?? ? ? ? ? ? ? ? ? ? ? 4 1 tuner vco + phase shift afc afc switch supply ?? ?? ?? vco 23 24 27 loop filter 22 ?? ?? offset comp. (optional) 26 fpll 0 90 vif amp 5 2 vif c agc take over point 20 16 3,18,19 25 v s ?? 28 c ref 14 afc demod. video 96 11978 ?? ?? video det. ?? ?? ? ? 6 sound trap ?? 17 1 vpp video out 6 db ?? ?? pll fm detector ?? ?? ? ? 13 11 audio out sound filter 21 mute vco 7 figure 1. block diagram
U4462B-B preliminary information telefunken semiconductors rev. a1, 30-jan-97 3 (13) circuit description vision if amplifier the video if signal (vif) is fed through a saw filter to the differential input (pin 5-6) of the vif amplifier. this amplifier consists of three ac-coupled amplifier stages. each differential amplifier is gain controlled by the automatic gain control (vif-agc). the output signal of the vif amplifier is applied to the fpll carrier generation and the video demodulator. tuner-and vif-agc at pin 2, the vif-agc charges/discharges the agc capacitor to generate a control voltage for setting the gain of vif amplifier and tuner in order to keep the demodulated video output signal (pin 16) at a constant level. therefore, the sync level of the demodulated video signal is the criterion for a fast charge/discharge of the agc capacitor. the agc control voltage at pin 2 is transferred to an internal control signal and is fed to the tuner agc to generate the tuner agc current on pin 4 (open collector output). the take-over point of the tuner agc can be adjusted at pin 1 by a potentiometer or an external dc voltage (from interface circuit or microprocessor). fpll, vco and afc the fpll circuit (frequency-phase-locked loop) consists of a frequency- and a phase detector to generate control voltage for the vco tuning. in locked mode, the vco is controlled by the phase detector and in unlocked mode the frequency detector is superimposed. the vco operates with an external resonance circuit (l and c parallel) and is controlled by internal varicaps. the vco control voltage at pin 27 (loop filter) is also converted to a current and represents the afc output signal at pin 20. a practicable vco alignment of the external coil is the adjustment to zero afc output current at pin 20. at center frequency the afc output current is equal to zero. the optional potentiometer at pin 26 allows an offset compensation of the vco phase for improved sound quality (fine adjustment). without a potentiometer (open circuit at pin 26), this offset compensation is not active. the oscillator signal passes a phase shifter and supplies the in-phase signal (0 ) and the quadrature signal (90 ) of the generated picture carrier. afc switch the afc output signal at pin 20 can be controlled by a switching voltage at pin 22. it is possible to switch off the afc . video demodulation and amplifier the video if signal, which is applied from the gain- controlled if amplifier, is multiplied with the in-phase component of the vco signal. the video demodulator is designed for low distortion and large bandwidth. the demodulator output signal passes an integrated low-pass filter for attenuation of the residual vision carrier and is fed to the video amplifier. the video amplifier is realized by an operational amplifier with internal feedback and 8 mhz bandwidth. an additional noise clipping is provided. the video signal is fed to vif-agc and to the video output buffer. this amplifier offers easy adaptation of the sound trap and sound filter. for nominal video if modulation, the video output signal at pin 16 is 1.5 v (peak-to-peak value). sound if limiter amplifier the intercarrier signal coming from the sound filter is fed to a 7-stage limiter amplifier. this guarantees high input sensitivity and excellent am suppression. pll-fm demodulator the alignmentfree aphase-locked-loopo (pll) fm demodulator covers a wide frequency range of 4.5 mhz up to 6.5 mhz with excellent noise performance. the linear voltage-to-frequency characteristic results in low harmonic distortion. the free-running frequency of the internal vco circuit is about 5.5 mhz. audio amplifier, de-emphasis and mute switch the demodulated fm signal is bufferred to pin 7 via de-emphasis filter. the de-emphasis low-pass filter consists of an internal 5-k series resistor and an external capacitor at pin 13. fm muting is possible by switching pin 11 to ground.
U4462B-B telefunken semiconductors rev. a1, 30-jan-97 preliminary information 4 (13) pin description 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 u4462b v top gnd c agc i tun v i,vif c dec c ref lf r comp v vco v sw (afc) v i,sif v afc v i,vid (trap) 95 10372 v i,vif v o,af nc c dem v o,vid v s v vco gnd v o,vid (demod) nc nc nc gnd nc figure 2. pinning pin symbol function 1 v top tuner agc take over point 2 c agc vif-agc (time constant) 3 gnd ground 4 i tun tuner agc output current 5, 6 v i,vif vif input (symmetrical) 7 v o,af audio output 8 nc not connected 9 nc not connected 10 nc not connected 11 c dec decoupling capacitor and mute switch 12 nd not connected 13 c dem de-emphasis capacitor 14 v o,vid video output (6 db amplifier) 15 nc not connected 16 v o,vid video demodulator output 17 v i,vid video input (6 db amplifier) 18 gnd ground 19 gnd ground 20 v afc afc output 21 v i,sif fm sound if input 22 v sw afc control switch 23, 24 v vco vco circuit (fpll) 25 v s supply voltage 26 r comp offset compensation 27 lf loop filter 28 c ref internal reference voltage
U4462B-B preliminary information telefunken semiconductors rev. a1, 30-jan-97 5 (13) absolute maximum ratings reference point pin 3 (19), unless otherwise specified parameters symbol value unit supply voltage sdip28 package pin 25 so28 package v s 9.0 6.0 v v supply current pin 25 i s 80 ma power dissipation v s = 9 v v s = 6 v p 720 480 mw mw output currents pins 10, 14, 15 and 16 i out 5 ma external voltages pins 1, 2, 5, 6, 7, 11, 13, 14, 16, 17, 21, 26, 28 23, 24, 27 4 20, 22 v ext + 4.5 + 3.5 + 13.5 v s v v v v junction temperature t j +125 c storage temperature t stg 25 to +125 c electrostatic handling *) all pins v esd 200 v *) equivalent to the discharge of a 200-pf capacitor via a 0- resistor operating range parameters symbol value unit supply voltage range sdip28 package pin 25 so28 package v s 4.5 to 9.0 4.5 to 6.0 v v ambient temperature t amb 0 to +70 c thermal resistance parameters symbol value unit junction ambient (when soldered to pcb) sdip28 package so28 package r thja 55 75 k/w k/w
U4462B-B telefunken semiconductors rev. a1, 30-jan-97 preliminary information 6 (13) electrical characteristics v s = +5 v, t amb = +25 c; reference point pin 3 (19), unless otherwise specified parameters test conditions / pins symbol min. typ. max. unit dc supply pin 25 supply voltage sdip28 package so28 package v s 4.5 4.5 5.0 5.0 9.0 6.0 v v supply current i s 65 73 80 ma vif input pin 56 input sensitivity, rms value for fpll locked v i,vif 80 120 m v rms input resistance see note 1, page 10 r in 1.2 k input capacitance see note 1, page 10 c in 2 pf if agc pin 2 if gain control range g v 60 65 db agc capacitor c agc 2.2 m f tuner agc pins 1 and 4 (see note 2, page 10) available tuner-agc current i tun 1 2 4 ma permissible output voltage v tun 0.3 13.5 v if slip tuner agc current i tun : 10% to 90% g if 8 10 db if input signal for minimum take-over point r top = 10 k (v top = 4.5 v) v in 4 mv if input signal for maximum take-over point r top = 0 (v top = 0.8 v) v in 40 mv variation of the take-over point by temperature t amb = 55 c vif-agc: g v = 46 db v in 2 3 db fpll and vco pins 23, 24, 26 and 27 (see note 3, page 10) max. oscillator frequency for carrier generation f vco 60 mhz vision carrier capture range f vco = 38.9 mhz c vco = 6.8 pf f cap 1.5 2 mhz oscillator drift (free-running) as a function of temperature see note 4, page 10 t amb = 55 c, c vco = 6.8 pf, f vco = 38.9 mhz f/ t 0.3 % video demodulator output pin 16 output current -source dc and ac i out 4 5 ma -sink dc and ac 2 3 ma output resistance see note 1, page 10 r out 100 video output signal peak-to-peak value v o,vid 1,26 1,4 1,54 v pp sync level v sync 1.8 v zero carrier level (ultra-white level) agc voltage v 2 = 3 v v dc 3.3 v supply-voltage influence on the ultra-white level v/v 1 %/v video bandwidth (3 db) r l 1 k , c l 50 pf b 6 8 mhz
U4462B-B preliminary information telefunken semiconductors rev. a1, 30-jan-97 7 (13) unit max. typ. min. symbol test conditions / pins parameters video frequency response over the agc range b 2.0 db differential gain error dg 2 5 % differential phase error dp 2 5 deg intermodulation 1.07 mhz related to color carrier test signal unmodulated, with picture carrier: 0 db color carrier: 6 db sound carrier: 24 db im 52 db video signal to noise ratio weighted, ccir567 s/ n 56 60 db residual vision carrier fundamental wave 38.9 mhz and second harmonic 77.8 mhz v res 2 10 mv ripple rejection, pin 25/ 16 see note 1, page 10 rr 35 db afc output pin 20 control slope i/ f 0.7 a/khz frequency drift by temperature related to the picture carrier frequency 0.25 0.6 % output voltage: upper limit lower limit v afc v s 0.6 0.6 v v output current i afc 0.2 ma afc switch pin 22 control voltage: afc aoffo afc aono see note 5, page 10 v sw 0 2.0 0.8 v s v v switching current i sw 100 a video input (6 db amplifier): pin 17 input resistance see note 1, page 10 r in 3 k input capacitance see note 1, page 10 c in 2.0 pf internal dc bias voltage (clamping voltage) v dc 1.7 v video input signal (cvbs) peak-to-peak value v i,vid 1 v pp video output (6 db amplifier): pin 14 dc output voltage (sync) v dc 1.25 v voltage gain, pin 17, 14 g v 6 db video output signal (cvbs) peak-to-peak value v in = 1v pp pin 17 v o,vid 2 v pp fm sound if input: pin 21 input limiting voltage, rms value af output signal at pin 7: 3 db v i,sif 150 mv rms dc input voltage v dc 1.7 v input resistance see note 1, page 10 r in 600 750 input capacitance see note 1, page 10 c in 1.5 pf
U4462B-B telefunken semiconductors rev. a1, 30-jan-97 preliminary information 8 (13) unit max. typ. min. symbol test conditions / pins parameters fm pll free-running frequency f vco 5.5 mhz oscillator drift (free running) as a function of temperature t = 55 c f vco 500 khz oscillator shift (free running) as a function of supply voltage 4.5 v < v s < 9.0 v f vco 200 khz capture range of pll f cap 1.4 1.9 mhz holding range of pll f hold 2.0 3.0 mhz audio output scart pin 7 dc output voltage v dc 2.3 v af output voltage v o,af 500 mv rms output resistance r out 140 de-emphasis capacitor pin 13 value of de-emphasis capacitor c dem 10 nf decoupling capacitor and mute switch pin 11 value of decoupling capacitor c dec 2.2 f control voltage for amute offo af aono, see note 6 v sw 2.0 v s v control voltage for amute ono af aoffo v sw 0 0.8 v notes: 1.) this parameter is given as an application information and not tested during production. 2.) an adjustment of the turn-over point (delayed tuner agc) with external resistor r top or external voltage v top is possible. 3.) external resonance circuit of vco: f = 38.9 mhz, c vco = 6.8 10 pf, coil l vco with unloaded q factor q o 55, minimum oscillator voltage v pin24 = 40 mv rms 4.) the oscillator drift is related to the picture carrier frequency, with an external temperature-compensated lc circuit. 5.) without control voltage at pin 22, the aafc ono mode is automatically selected. 6.) without external control voltage at pin 11, the mute function is not active.
U4462B-B preliminary information telefunken semiconductors rev. a1, 30-jan-97 9 (13) 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 34 5 678 9 10 11 12 13 14 6.8 pf +5 v offset comp. 10 k loop filter 470 nf 2.2 ' c ref 10 k tuner l vco c vco u4462bb 96 11976 100 video 1.5 vpp agc (vif) 2.2 f audio out video out *) tuner agc sound filter sound trap afc afc switch vif 1 f 2.2 f mute figure 3. test circuit 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 345 6789 10 11 12 13 14 6.8 pf 10 nf 47 k 47 k +5 v offset comp. 10 k loop filter 470 nf 2.2 f c ref afc switch sif 10 k tuner l vco c vco u4462bb 96 11977 100 s3 10 nf 680 sfe 5.5 mc afc out 10 ) t 5.5 d agc (vif) 2.2 f saw: audio out 300 22 f *) video demod. tuner agc ifin video out 2.2 f s1 mute 680 figure 4. basic application circuit
U4462B-B telefunken semiconductors rev. a1, 30-jan-97 preliminary information 10 (13) internal pin configuration 5 6 2 k 2 k 2.3 v 94 8558 4.2 v figure 5. video if input (pins 5 and 6) 6 k 6.5 k 94 8559 3.5 v 1 figure 6. take-over point tuner agc (pin 1) 94 8560 2 figure 7. time constant vif agc (pin 2) 94 8561 4 figure 8. tuner agc current output (pin 4) 94 8562 100 1.8 ma 7 figure 9. audio output scart (pin 7) 94 8563 8 50 k figure 10. audio input scart (pin 8) 94 8566 5 k 11 figure 11. decoupling capacitor (pin 11) and mute switch 94 8568 13 5 k figure 12. de-emphasis (pin 13)
U4462B-B preliminary information telefunken semiconductors rev. a1, 30-jan-97 11 (13) 94 8569 14 figure 13. video output (6 db amplifier) (pin 14) 5.8 k 6.8 k 94 8572 3.5 v 17 figure 14. video input (6 db amplifier) (pin 17) 94 8573 16 figure 15. video demodulator output (pin 16) 94 8574 600 21 600 1.75 v figure 16. fm sound if input (pin 21) 94 8575 20 figure 17. afc output (pin 20) 10.5 k 30 k 94 8576 3.5 v 22 figure 18. afc control switch (pin 22) 94 8577 7 k 7 k 23 24 figure 19. vco circuit (pin 2324) 94 8578 26 10 k 10 k 3.5 v figure 20. offset compensation (pin 26) 94 8579 27 2.75 v figure 21. loop filter (pin 27) 94 8580 28 3.5 v figure 22. internal reference voltage (pin 28)
U4462B-B telefunken semiconductors rev. a1, 30-jan-97 preliminary information 12 (13) package information 0.53 0.43 4.8 4.2 0.35 0.25 10.26 10.06 13028 1.778 1 3.3 0.9 8.7 8.5 12.2 11.0 package sdip2830 dimensions in mm olo oxo package sdip30 technical drawings according to din specifications olo min max oxo 27.1 27.5 27.1 27.5 23.114 24.892 sdip28 13033 technical drawings according to din specifications 0.25 0.10 package so28 dimensions in mm 0.4 1.27 16.51 18.05 17.80 2.35 7.5 7.3 9.15 8.65 10.50 10.20 0.25 28 15 114
U4462B-B preliminary information telefunken semiconductors rev. a1, 30-jan-97 13 (13) ozone depleting substances policy statement it is the policy of temic telefunken microelectronic gmbh to 1. meet all present and future national and international statutory requirements. 2. regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. it is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( odss). the montreal protocol ( 1987) and its london amendments ( 1990) intend to severely restrict the use of odss and forbid their use within the next ten years. various national and international initiatives are pressing for an earlier ban on these substances. temic telefunken microelectronic gmbh semiconductor division has been able to use its policy of continuous improvements to eliminate the use of odss listed in the following documents. 1. annex a, b and list of transitional substances of the montreal protocol and the london amendments respectively 2 . class i and ii ozone depleting substances in the clean air act amendments of 1990 by the environmental protection agency ( epa ) in the usa 3. council decision 88/540/eec and 91/690/eec annex a, b and c ( transitional substances ) respectively. temic can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. we reserve the right to make changes to improve technical design and may do so without further notice . parameters can vary in different applications. all operating parameters must be validated for each customer application by the customer. should the buyer use temic products for any unintended or unauthorized application, the buyer shall indemnify temic against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. temic telefunken microelectronic gmbh, p.o.b. 3535, d-74025 heilbronn, germany telephone: 49 ( 0 ) 7131 67 2831, fax number: 49 ( 0 ) 7131 67 2423

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