u4460bg-m telefunken semiconductors rev. a2, 15-oct-96 1 (9) video if amplifier with fpll demodulation description the u4460bg is an integrated bipolar circuit for video if (vif) signal processing in tv/vcr and multimedia applications. the circuit processes all tv video if signals with negative modulation (e.g., b/g standard). features active carrier generation by fpll principle (frequency-phase-locked-loop) for true synchronous demodulation very linear video demodulation, good pulse response and excellent intermodulation figures vco operates on picture carrier frequency alignment-free afc, no external reference circuit vifagc with peak sync. detection tuner agc with adjustable take over point 5 v supply voltage; low power consumption relevant pinning is compatible with the tda4474 /71 video-/ sound if combination package: sdip28 ?? ?? ? ? ?? ?? ?? ?? agc (vif) tuner agc ?? ?? ?? ?? ?? ?? ?? ?? 12 11 tuner vco + phase shift afc supply ?? ?? ?? vco 21 22 19 loop filter ?? ?? offset comp. (optional) 27 fpll 0 90 vif amp 5 6 7 vif c agc take over point 23 13 3,8,17 24 v s ? ? 18 c ref afc video ?? ?? video det. ?? 20 afc switch ? 95 9815 ?? ?? figure 1. block diagram
u4460bg-m telefunken semiconductors rev. a2, 15-oct-96 2 (9) pin description 1 2 3 4 5 6 7 8 10 9 27 22 21 20 18 19 17 12 11 28 25 26 23 24 v i , vif c agc gnd n.c. n.c. r top n.c. v i , vif i tun gnd n.c. n.c. v afc v vco v vco n.c. lf c ref n.c. v s gnd n.c. r comp n.c. 16 15 14 13 95 10650 v o , vid n.c. n.c. n.c. figure 2. pinning pin symbol function 1 n.c. not connected 2 n.c. not connected 3 gnd ground 4 n.c. not connected 5, 6 v i,vif vif input (symmetrical) 7 c agc vif-agc (time constant) 8 gnd ground 9 n.c. not connected 10 n.c. not connected 11 r top take over point, tuner agc 12 i tun tuner agc output current 13 v o,vid video output 14 n.c. not connected 15 n.c. not connected 16 n.c. not connected 17 gnd ground 18 c ref internal reference voltage 19 lf loop filter 20 n.c. afc switch 21, 22 v vco vco circuit 23 v afc afc output 24 v s supply voltage 25 n.c. not connected 26 n.c. not connected 27 r comp offset compensation 28 n.c. not connected circuit description vision if amplifier the video if signal (vif) is fed through a saw filter to the vif input (pin 56). the vif amplifier consists of three ac-coupled amplifier stages. each differential amplifier is gain controlled by the automatic gain control (vif-agc). output signal of the vif amplifier is applied to the fpll carrier generation and the video demodulator. vif-agc and adjustable tuner agc at pin 7, 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 video out- put signal 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 control voltage (agc voltage at pin 7) is transferred to an internal control signal and fed to the tuner agc to generate the tuner agc current at pin 12 (open collector output). the take over point of the tuner agc can be ad- justed at pin 11 by a potentiometer or an external dc voltage (from interface circuit or microprocessor).
u4460bg-m telefunken semiconductors rev. a2, 15-oct-96 3 (9) fpll, vco and afc the fpll circuit (frequency phase locked loop) consists of a frequency and phase detector for generating the con- trol voltage for the vco tuning. in the locked mode, the vco is controlled by the phase detector, whereas in un- locked 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 is also converted to a current and represents the afc output signal at pin 23. a practicable vco alignment of the external coil is the adjustment to zero afc output current at pin 23. at center frequency, the afc output current is equal to zero. the optional potentiometer at pin 27 allows an offset compensation of the vco phase for improved sound quality (fine adjustment). without a potentiometer (open circuit at pin 27), this offset compensation is not active. the oscillator signal passes a phase shifter and supplies the inphase signal (0 ) and the quadrature signal (90 ) of the generated picture carrier. video demodulation and amplifier the video if signal, which is applied from the gain controlled if amplifier, is multiplied with the inphase 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 (3 db). the video signal is fed to vif- agc and to the video output buffer. this amplifier, with a 6 db gain, offers easy adaption of the sound trap. for nominal video if modulation, the video output signal at pin 13 is 2 v (peak-to-peak value). internal voltage stabilizer the internal bandgap reference ensures constant performance independent of supply voltage and temperature. absolute maximum ratings reference point pin 3 (8, 17), unless otherwise specified parameters symbol value unit supply voltage pin 24 v s 9.0 v supply current pin 24 i s 93 ma power dissipation, v s = + 9 v p 840 mw output currents pin 13 i out 5 ma external voltages pin 5, 6, 7, 11, 13, 18, 19, 27 + 4.5 v pin 21, 22 v ext + 3.5 v pin 12 + 13.5 v pin 20,23 v s v junction temperature t j +125 c storage temperature t stg 25 to +125 c electrostatic handling *) all pins v esd 300 v *) equivalent to discharging a 200 pf capacitor through a 0 resistor operating range parameters symbol value unit supply voltage range pin 24 v s 4.5 to 9.0 v ambient temperature t amb 10 to +85 c
u4460bg-m telefunken semiconductors rev. a2, 15-oct-96 4 (9) thermal resistance parameters symbol value unit junction ambient when soldered to pcb r thja 55 k/w electrical characteristics v s = +5 v, t amb = +25 c; reference point pin 3 (8, 17), unless otherwise specified parameters test conditions / pins symbol min. typ. max. unit dc-supply pin 24 supply voltage v s 4.5 5.0 9.0 v supply current: i s 85 93 ma vif-input pins 56 input sensitivity, rms value for fpll locked v in 80 120 v rms input impedance see note 1 r in 1.2 k input capacitance see note 1 c in 2 pf vif-agc pin 7 if gain control range g v 60 65 db agc capacitor c agc 2.2 f switching voltage: vcr mode see note 2 v sw 4.0 v switching current: vcr mode see note 2 i sw 50 a tuner-agc pins 11, 12, see note 3 available tuner-agc current i tun 1 2 4 ma allowable output voltage v out 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 vifagc: g v = 46 db v in 2 3 db fpll and vco pins 19, 21, 22, 27, see note 4 max. oscillator frequency for carrier generation f vco 70 mhz vision carrier capture range f vco = 38.9 mhz c vco = 8.2 pf f cap 1.5 2 mhz oscillator drift (free runing) as function of temperature see note 5 t amb = 55 c, c vco = 8.2 pf, f vco = 38.9 mhz f/ t 0.3 %
u4460bg-m telefunken semiconductors rev. a2, 15-oct-96 5 (9) unit max. typ. min. symbol test conditions / pins parameters video output pin 13 output current source i out 2 5 ma output cu e t sou ce sink i out 5 3 output resistance see note 1 r out 100 video output signal peak-to-peak value v o,vid 1.8 2.0 2.2 v pp sync. level v sync 1.2 v zero carrier level (neg. modolation) (= ultra white level) v 7 = 3 v v dc 3.4 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 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 see note 6 im 52 60 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 res1 2 10 mv lower limiting level below sync. level v lim1 400 mv upper limiting level above ultra white level v lim2 600 mv ripple rejection pin 24/ pin 13; see note 1 rr 35 db afc output pin 23 control slope i/ f 0.7 a/khz frequency drift by temperature related to the picture car- rier frequency 0.25 0.6 % output voltage upper limit v afc v s 0.4 v output vo tage uppe t lower limit v afc v s 0. 0.4 v v output current i afc 0.2 ma notes: 1.) this parameter is given as an application information and not tested during production. 2.) in avcr modeo the vif path is switched off. 3.) adjustment of turn over point (delayed tuner agc) with external resistor r top or external voltage v top possible. 4.) resonance circuit of the vco: f = 38.9 mhz capacitor c vco = 8.2 10 pf, coil l vco with unloaded q-factor qo 60 for an oscillator voltage 100 mv rms (pin 21-22), e.g. toko coil 7km, 292xns-4051z) 5.) the oscillator drift is related to the picture carrier frequency, at external temperature-compensated lc circuit 6.) (1.07) = 20 log (4.43 mhz component/1.07 mhz component); (1.07) value related to blackwhite signal input signal conditions: picture carrier 0 db colour carrier 6 db sound carrier 24 db
u4460bg-m telefunken semiconductors rev. a2, 15-oct-96 6 (9) 28 27 26 25 24 23 22 21 20 19 18 17 16 15 12 35 4 6 7 8 9 1011121314 8.2 pf l vco c vco loop filter 150 470 nf afc switch afc +v s 10 k loop comp. c ref 2.2 f 10 k tuner delay tuner agc video agc (vif) vif 95 9642 n.c. n.c. n.c. n.c. n.c. n.c. n.c. n.c. 2.2 f n.c. n.c. n.c. *) external l/c circuit (vco: 38.9 mhz) with toko coil 7km, 292 xns-4051z *) figure 3. test circuit internal pin configuration 94 8524 2 k 2 k 2.3 v 4.2 v figure 4. video if input (pin 56) 94 8525 figure 5. vif-agc time constant (pin 7)
u4460bg-m telefunken semiconductors rev. a2, 15-oct-96 7 (9) 6 k 6.5 k 94 8526 3.5 v figure 6. tuner agc take-over point (pin 11) 94 8527 figure 7. tuner agc output (pin 12) 94 8528 2.6 ma figure 8. video output (pin 13) 94 8531 3.5 v figure 9. internal reference voltage (pin 18) 94 8532 2.75 v figure 10. loop filter (pin 19) 94 8534 7 k 7 k figure 11. vco (pin 2122)
u4460bg-m telefunken semiconductors rev. a2, 15-oct-96 8 (9) 94 8535 figure 12. afc output (pin 23) 94 8538 10 k 10 k 3.5 v figure 13. vco offset compensation (pin 27) dimensions in mm 95 10610 95 10610 figure 14. 28 pin shrink-dual-inline-plastic (sdip28)
u4460bg-m telefunken semiconductors rev. a2, 15-oct-96 9 (9) 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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