U4467B preliminary information telefunken semiconductors rev. a1, 18-jul-97 1 (7) tv sound am demodulator description the U4467B is an integrated bipolar circuit for am sound demodulation used in the l and l' standard (france). the ic provides the audio signal and mute switch as well. the U4467B is designed for tv-, vcr- and multimedia applications. features gain-controlled 3-stage wideband if amplifier complete alignment-free am demodulator without external reference circuit agc with a mean level detector mute switch 5-v power supply, low power consumption block diagram mean am-det 6 if-amp 2 1 ref 14 4 v s 13 10 3 s2 mute af(am) agc if am 13828 figure 1. ordering information extended type number package remarks U4467B dip16
U4467B telefunken semiconductors rev. a1, 18-jul-97 preliminary information 2 (7) circuit description if amplifier and agc the symmetrical if input signal from the external saw filter is fed to the pins 1 and 2. in l-standard, a bandpass filter with the center frequency at the l-sound carrier is used. the amplifier consists of three ac-coupled wideband if stages. each differential amplifier stage is gain controlled by the agc ( a utomatic g ain c ontrol) voltage, available at pin 3. the output signal of the if amplifier is applied to the am demodulator. the if-agc is derived from the average level of the am sound. it controls the three-stage wideband amplifier to provide a constant sif signal to the am demodulator. am demodulator the alignment-free am demodulator is realized by a syn- chronous detector. the modulated if signal from the wideband if amplifier output is multiplied in phase with the limited if signal to remove the am. then, the result- ing af signal of the demodulator output is fed to the output amplifier and to the agc stage. mute switch the am sound output (pin 6) can be muted in pulling mute switch (pin 10) to 'low'. internal voltage stabilizer the internal bandgap reference voltage (4.25 v at pin 4) ensures constant performance independent of supply voltage and temperature. pin description 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 U4467B v i,if v i,if c agc c ref nc v o,am v s nc nc gnd nc v sw,mute 13829 nc nc nc nc figure 2. pinning pin symbol function 1 v i,if if input (symmetrical) 2 v i,if if input (symmetrical) 3 c agc capacitor for agc time constant 4 c ref capacitor for internal reference voltage 5 nc not connected 6 v o,am af output (am sound) 7 nc not connected 8 nc not connected 9 nc not connected 10 v sw,mute mute switch 11 nc not connected 12 nc not connected 13 gnd ground 14 v s supply voltage (5 v) 15 nc not connected 16 nc not connected
U4467B preliminary information telefunken semiconductors rev. a1, 18-jul-97 3 (7) absolute maximum ratings reference point pin 13, unless otherwise specified parameters symbol value unit supply voltage range pin 14 v s 4.5 to 9.0 v supply current pin 14 i s 40 ma power dissipation (v s = 9 v) p 360 mw output current pin 6 i out 5 ma external voltages pins 1, 2, 3, 4 and 6 v t + 4.5 v pin 10 v ext v s v junction temperature t j + 125 c operating temperature range t amb 0 to + 85 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 thermal resistance parameters symbol value unit junction ambient when soldered to pcb r thja 60 k/w electrical characteristics v s = +5 v, t amb = +25 c; reference point pin 13, unless otherwise specified parameters test conditions / pins symbol min. typ. max. unit dc-supply (pin 14) supply voltage v s 4.5 5.0 9.0 v supply current v in = 10 mv or v 3 = 2 v i s 26 ma if-input (pins 1 and 2) minimum if input signal output signal: 3 db v in 50 v rms maximum if input signal output signal: + 1 db v in 70 100 mv rms input impedance see note 1 r in 1.2 k input capacitance see note 1 c in 2 pf sif-agc (pin 3) if gain control range g v 60 65 db agc capacitor c agc 4.7 f am mute switch (pin 10) switching voltage am output active v mute1 open switching voltage am output switched off v mute2 0 1.5 v switching current i mute 100 a note 1. this parameter is given as an application information and not tested during production.
U4467B telefunken semiconductors rev. a1, 18-jul-97 preliminary information 4 (7) electrical characteristics (continued) v s = + 5 v, t amb = +25 c; reference point pin 13, unless otherwise specified parameters test conditions / pins symbol min. typ. max. unit af output am (pin 6) see note 2 dc output voltage v dc 2.2 v output resistance see note 1 r out 150 af output signal m = 54% v oaf 500 mv rms af bandwidth 3 db b tbd khz total harmonic distortion m = 54% f mod = 1 khz, 12.5 khz thd 1 2 % weighted signal-to-noise ratio (ccir 468) reference: m = 54%; f mod = 1 khz s/n 56 db ripple rejection see note 1; tested from pin 14 to pin 6 rr 28 db allowable ac output peak current i ac 0.3 ma allowable dc output current i dc 1 ma notes 1. this parameter is given as an application information and is not tested during production. 2. sound carrier sc = 32.4 mhz, modulated with f mod = 1 khz, m = 54%: v in = 10 mv test circuit 16 123 4 U4467B 56 7 8 15 14 13 12 11 10 9 if 22 m f nc v s +5 v nc s1 mute 4.7 m f 4.7 m f af (am) 32.4 mhz standard l 13830 nc nc nc nc nc nc figure 3.
U4467B preliminary information telefunken semiconductors rev. a1, 18-jul-97 5 (7) internal pin configuration 2.3 v 10 k w 10 k w 2 k w 2 k w 2 1 13795 figure 4. sound if inputs (pins 1 and 2) 3 13796 figure 5. agc time constant (pin 3) 13797 4 3.5 v 4.25 v figure 6. internal reference voltage (pin 4) 1 ma 6 13799 idc 1.45 v 100 w figure 7. am output (pin 6) 13802 20 k w 2.6 v 10 20 k w 3.5 v figure 8. mute switch (pin 10)
U4467B telefunken semiconductors rev. a1, 18-jul-97 preliminary information 6 (7) package information 13015 package dip16 dimensions in mm 0.5 min 1.64 1.44 technical drawings according to din specifications 20.0 max 4.8 max 3.3 7.82 7.42 6.4 max 0.39 max 9.75 8.15 0.58 0.48 2.54 17.78 alternative 16 9 18
U4467B preliminary information telefunken semiconductors rev. a1, 18-jul-97 7 (7) 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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