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rev. 4807a?audr?05/04 features on-chip control functions are available for system gain adjust (db linear versus dc current) low noise lo design esd protected benefits all front-end functions of a high-performance fm receiver except the rf preamplifier are integrated improved dynamic range by high current double-balanced mixer design and a new agc conception with 3 loops on-chip improved blocking and intermod behavior due to a unique ?interference? sensor controlling the agc easy cascading of 3 if filters (ceramic) enabled by two on-chip if preamplifiers description the ic u4065b is a bipolar integrated fm front-end circuit. it contains a mixer, an oscillator, two if preamplifiers and an unique interference sensor. the device is designed for high-performance car radio and home receiver applications. fm receiver ic u4065b
2 u4065b 4807a?audr?05/04 figure 1. block diagram v s 22 1 11 9 8 10 6 17 13 3 5 7 4 21 18 19 16 14 23 24 + if bpf if bpf if bpf if output if 2 if 1 if gain adjust v s voltage regulator if bpf ant interference mixer mixer rf pin att rf tank v tune rf tank local oscillator if tank lo output v ref = 4 v 20 2 lo tank agc adjust agc level v s 12 nc (wide band) agc wide band and if if and detector interference v s
3 u4065b 4807a?audr?05/04 pin configuration figure 2. pinning so24 1 2 3 4 5 6 7 8 10 9 23 18 17 16 14 15 13 12 11 24 21 22 19 20 vs if1out gnd2 imifin agcout immixout gainif1 if2in nc if2out gnd1 lobuff mixout2 mixout1 vref mixin2 mixin1 gnd3 if1in gnd4 agcwb gnd5 loe lob
4 u4065b 4807a?audr?05/04 pin description pin symbol function 1 lobuff buffered local oscillator output 2 gnd1 ground of the second if amplifier 3 if2out output of the second if amplifier 4 gainif1 gain control of the first if amplifier 5 if2in input of the second if amplifier 6 vs supply voltage 7 if1out output of the first if amplifier 8 gnd2 ground 9 imifin input of the amplifier for the im sensor 10 agcout output of the automatic gain control 11 immixout output of the intermodulation mixer 12 nc not connected 13 agcwb threshold adjustment of the wideband agc 14 gnd3 mixer ground 15 mixin1 input 1 of the double-balanced mixer 16 mixin2 input 2 of the double-balanced mixer 17 vref reference voltage output 18 mixout1 mixer output 1 19 mixout2 mixer output 2 20 gnd4 ground of the first if amplifier 21 if1in input of the first if amplifier 22 gnd5 oscillator ground 23 loe local oscillator (emitter) 24 lob local oscillator (base)
5 u4065b 4807a?audr?05/04 lobuff figure 3. buffered local oscillator output the buffered local oscillator used for output, dr ives the fm input of the pll circuit (for example, u428xbm family). the typical par allel output resistance at 100 mhz is 70 ? , the parallel output capacitance is about 10 pf. when using an external load of 500 ? /10 pf, the oscillator swing is about 100 mv. the second harmonic of the oscillator fre- quency is less than -15 dbc. gnd1 figure 4. ground of the second if amplifier there is no internal connection to the other ground pins. if2out figure 5. output of the second if amplifier the parallel output capacitance to ground is about 7 pf. the external load resistance must be connected to v s . the dc current into the pin is typically 3 ma. note: the supply voltage v s has to be protected against if distortion. esd 50 23 1 + 1 v esd 8 2 esd 3 v s v ref
6 u4065b 4807a?audr?05/04 gainif1 figure 6. gain control of the first if amplifier the gain of the first if amplifier can be adjusted by a resistor to ground. this is useful, for example, to compensate for the insertion loss tolerances of the ceramic bpfs. it must be ensured that the output current of the pin does not exceed 150 a in any case. linear increasing in the current out of gainif1 results in a linear db increase of the gain (0.15 db/a). i 4 = 0, thus, g = g min = 2 db i 4 = 140 a, thus, g = g max = 22 db if2in figure 7. input of the second if amplifier the parallel input resistance is 330 ? . the parallel input capacitance is about 12 pf. no dc current is allowed. to avoid overload of this stage, an internal detector watches the input level and causes current at the agcout pin. 2 k ? 4 esd 17 v ref esd 5 v ref
7 u4065b 4807a?audr?05/04 if1out figure 8. output of the first if amplifier the parallel output resistance is 330 ? which allows the use of standard ceramic bpf. the parallel output capacitance is about 7 pf. the dc voltage at the pin is 0.5 v less than v s . imifin figure 9. input of the if amplifier for the im sensor the parallel input resistance is 330 ? . the amplifier is extremely sensitive to ac signals. an if signal with a few hundred v at this pin will cause current at the agc output. therefore, attention needs to be paid wh en connecting the standard ceramic filter between imout and this pin. the reference point of the filter has to be free of any ac signal, no dc current shall appear at this pin. 330 v s esd 7 esd 9
8 u4065b 4807a?audr?05/04 agcout figure 10. output of the automatic gain control the agc output is an open collector output. the current of the pin diode is this current multiplied by the current gain of the external pnp transistor. the dc voltage at the pin may vary from 2 v to v s , therefore, this pin can easily be used as an indicator of the agc regulation state. immixout figure 11. output of the intermodulation mixer the parallel output resistance is 330 ? which allows the use of standard ceramic bpf without any further matching network. it must be ensured that the ground pin of the filter is free of ac signals. agcwb figure 12. threshold adjustment of the wideband agc the threshold of the wideband agc can be adjusted by an external resistor to ground. the setting range is 10 db. for minimum bloc king, this pin is connected to ground. to set the threshold to lower levels, the resistance should have a value of up to a few hun- dred k ? . 10 1k 1 v esd 11 esd 300 1 v v s 35k 32k esd 13 v ref
9 u4065b 4807a?audr?05/04 mixin1 figure 13. input 1 of the double-balanced mixer the parallel input resistance is 1.2 k ? . the parallel input capacitance is about 9 pf. when using the mixer in an unbalanced way, this pin needs to be grounded for rf sig- nals by an external capacitance of a few nf. dc current is not allowed. mixin2 figure 14. input 2 of the double-balanced mixer the parallel input resistance is 1.6 k ? . the parallel input capacitance is about 7 pf. the double sideband noise figure of the unbalanced mixer is about 7 db. if using the mixer in balanced mode, the noise figure will be reduced by about 0.8 db. vref figure 15. reference voltage output the internal temperature-compensated reference voltage is 3.9 v and it is used as bias voltage for most blocks. therefore, the electrical characteristics of the u4065b are mainly independent of the supply voltage. the internal output resistance of the refer- ence voltage is less than 10 ? . to avoid internal coupling across this pin, external capacitors are required. the maximum output current is i ref = 5 ma. 15 esd 2.5k v ref 16 esd 2.5k v ref 17 esd 4.6 v 200 v s
10 u4065b 4807a?audr?05/04 mixout1, mixout2 figure 16. mixer output 1, 2 the mixer output is an open collector of a bipolar transistor. the minimum voltage at these pins is 5 v (v s - voltage swing). the dc current into these pins is typically 9 ma. good lo and rf suppression at the mixer output can be achieved by symmetrical load conditions at the pins mixout1 and mixout2. if1in figure 17. input of the first if amplifier the typical input resistance is 330 ? . the dc voltage is almost identical to the reference voltage. dc current must be avoided at this pin. 19 18 esd 330 21 esd v ref
11 u4065b 4807a?audr?05/04 loe figure 18. emitter of the local oscillator an external capacitor is connected between loe and ground. the ground pin of this capacitor must be connected to pin gnd5, the chip-internal ground of the local oscillator. lob figure 19. base of the local oscillator the tank of the local oscillator is connected at pin lob. the ground pin of this tank needs to be connected to pin gnd5, the chip-internal ground of the local oscillator?s pin 24. the resonant resistance of the tank should be about 250 ? . minimum q of the unloaded tank is 50. esd 23 esd 24
12 u4065b 4807a?audr?05/04 functional description the u4065b fm-frontend ic is the dedicated solution for high-end car radios. a new design philosophy enables to build up tuners with superior behavior. this philosophy is based on the fact that the sensitivity of state of the art designs is at the physical border and cannot be enhanced any more. on the other hand, the spectral power density in the fm-band increases. an improvement of rec eption can only be achieved by increasing the dynamic range of the receiver. this descr iption is to give the designer an introduc- tion to get familiar with this new product and its philosophy. the signal path the u4065b offers the complete signal path of an fm-frontend ic including a highly lin- ear mixer and two if preamplifiers. the mixer is a double-balanced, high-current gilbert cell. a high transit frequency of the internal transistors enables the use of the emitter grounded circuit with its favorable noise behavior. the full balanced output offers lo carrier reduction. the first if preamplifier has a db-linear gain adjustment by dc means. thus, different ceramic filter losses can be compensated and the overall tuner gain can be adapted to the individual requirements. the low noise design suppresses post stage noise in the signal path. input and output resistance is 330 ? to support standard ceramic filters. this is achieved without feedback, which would cause different input impedances when vary- ing the output impedance. the second if preamplifier enables the use of three ceramic filters with real 330 ? input- and output termination. feedthrough of signals is kept low. the high level of output com- pression is necessary to keep up a high dynamic range. beneath the signal path the local oscillator part and the agc signal generation can be found on chip. the local oscillator uses the collector grounded colpitts type. a low phase noise is achieved with this access. a mu tual coupling in the oscillator coil is not necessary. the agc concept special care was taken to design a unique agc concept. it offers 3 agc loops for differ- ent kinds of reception conditions. the most important loop is the interference sensor part. in today?s high-end car radios, the fm agc is state of the art. it is necessary to reduce the influence of 3rd and higher order intermodulation to sustain reception in the pres- ence of strong signals in the band. on one hand, it makes sense to reduce the desired signal level by agc as few as possible to keep up stereo reception, on the other hand two or more strong out-of-channel signals may interfere and generate an intermodula- tion signal on the desired frequency. by introducing input attenuation, the level of the intermod signal decreases by a higher order, whereas the level of the desired signal shows only a linear dependency on the input attenuation. therefore, input attenuation by pin diodes may keep up reception in the presence of strong signals. the standard solution to generate the pin diode current is to pick up the rf-signal in front of the mixer. because the bandwidth at that point is about 1.5 mhz, this is called wideband agc. the threshold of agc start is a critical parameter. a low threshold does not allow any intermodulation but has the di sadvantage of blocking if there is only one strong station on the band or if the intermod signals do not cover the desired channel. a higher agc threshold may tolerate a certain ground floor of intermodulation. this avoids blocking, but it has the disadvantage, that no reception is possible, if the interfering sig- nals generate an intermod signal inside the desired channel. this contradiction could not be overcome in the past.
13 u4065b 4807a?audr?05/04 with the new u4065b ic, there is a unique access to this problem. this product has an interference sensor on chip. thus, an input signal attenuation is only performed if the interfering signals do generate an intermod signal inside the desired channel. if they do not, the existing wideband agc is active but up to 20 db higher levels. the optimum agc state is always generated. the figure 20 to figure 23 on page 14 illustrate the situation. in figure 20 the agc threshold of a standard tuner is high to avoid blocking. but then the intermod signal sup- presses the desired signal. the interference sensor of the u4065b ensures that the agc threshold is kept low as illustrated in figure 21 on page 14. in figure 22 on page 14 the situation is reversed. the agc threshold of a standard tuner is kept low to avoid intermod problems. but then blocking makes the desired sig- nal level drop below the necessary stereo level. in this case, the higher wideband agc level of the u4065b enables perfect stereo reception. by principle, this interference sensor is an element with a third order characteristic. for input levels of zero, the output level is zero, too. with increasing input level, the output level is increased with the power of three, thus preferring intermod signals compared to linear signals. at the same time, a down conversion to the if level of 10.7 mhz is per- formed. if a corresponding 10.7 mhz if filter selects the intermod signals, only an output is generated, if an intermod signal inside the 10.7 mhz channel is present. the circuit blocks interference sensor and if, and detector build up a second if chain. in an fm system, the maximum deviation of a 3rd order intermod signal is the triple max deviation of the desired signal. therefore, the ceramic if bpf between pin 11 and pin 9 may be a large bandwidth type. this is all that is needed for this unique feature. a further narrow band agc avoids overriding the second if amplifier. the amplitude information of the channel is not compressed in order to maintain multipath detection in the if part of the receiver. figure 20. a high agc threshold causes the intermod signal to suppress the desired signal level frequency noise floor stereo-level desired frequency desired signal interfering signals intermod signal intermod signal
14 u4065b 4807a?audr?05/04 figure 21. agc threshold settings figure 22. a low agc threshold causes the blocking signal to suppress the desired signal figure 23. the correct agc threshold enables optimum reception level frequency noise floor stereo-level desired frequency desired signal interfering signals intermod signal intermod signal level frequency noise floor stereo-level desired frequency desired signal strong signal level frequency noise floor stereo-level desired frequency desired signal strong signal
15 u4065b 4807a?audr?05/04 absolute maximum ratings stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability . reference point is ground (pins 2, 8, 14, 20 and 22) parameters symbol value unit supply voltage v s 10 v power dissipation at t amb = 85c p tot 470 mw junction temperature t j 125 c ambient temperature range t amb -30 to +85 c storage temperature range t stg -50 to +125 c electrostatic handling: human body model (hbm), all i/o pins tested against the supply pins v esd 2000 v thermal resistance parameters symbol value unit thermal resistance r thja 90 k/w electrical characteristics v s = 8.0 v, f rf = 98 mhz, f osc ? 108.7 mhz, f if = f osc - f rf = 10.7 mhz reference point is ground (pins 2, 8, 14, 20, and 22),t amb = 25c, unless otherwise specified. parameters test conditions pin symbol min. typ. max. unit supply voltage 3, 6, 10, 18, 19 v s 7810v supply current 3, 6, 10, 18, 19 i tot 37 47 ma oscillator (gnd5 has to be connected to external oscillator components) oscillator voltage r g24 = 220 ? , unloaded q of l osc = 70, r l1 =520 ? 24 23 1 v lob v loe v lobuff 70 160 100 90 220 mv harmonics 1 -15 dbc output resistance 1 r lo 70 ? voltage gain between 1 and 23 0.9 mixer (gnd3 has to be separated from gnd1, gnd2 and gnd4) conversion power gain source impedance: r g15,16 = 200 ? load impedance: r l18,19 = 200 ? g c 5710db 3rd-order input intercept ip 3 4 6 14 dbm conversion transconductance g c 8ma/v noise figure nf dsb 7db input resistance to ground f = 100 mhz 15 r ignd15 1.2 k ? input capacitance to ground f = 100 mhz 15 c ignd15 9pf input resistance to ground f = 100 mhz 16 r ignd16 1.6 k ? input capacitance to ground f = 100 mhz 16 c ignd16 7pf input-input resistance between 15 and 16 r ii15,16 1.6 k ? input-input capacitance between 15 and 16 c ii15,16 5pf output capacitance to gnd 18 and 19 c ignd18,19 9pf
16 u4065b 4807a?audr?05/04 first if preamplifier (if 1) gain control deviation by i 4 4 172024db gain control slope 4 dg if1 /di 4 0.15 db/a external control current to ground at g min at g nom at g max i 4min i 4nom i 4max 0 70 140 a power gain at i 4min at i 4nom at i 4max source impedance: r g21 = 200 ? , load impedance: r l7 = 200 ? between 21 and 7 g min g nom g max -2.5 11 19 2 12 22 2.5 16 28 db noise figure at g max at g nom at g min between 21 and 7 nf min nf nom nf max 7 9 15 db temperature coefficient of the gain at g nom tknom +0.045 db/k 1 db compression at g nom 7v cnom 70 mv -3 db cut-off frequency at g nom 7f cnom 50 mhz input resistance f = 10 mhz 21 r iif1 270 330 400 ? input capacitance f = 10 mhz 21 c iif1 5pf output resistance f = 10 mhz 7 r oif1 270 330 400 ? output capacitance f = 10 mhz 7 c oif1 7pf second if preamplifier (if 2) power gain source impedance: r g5 = 200 ? load impedance: r l3 = 200 ? between 5 and 3 g if2 15 18 19 db noise figure nf if2 7db 1 db compression 3 v comp 500 mv -3 db cutoff frequency 3 f c 50 mhz parallel input resistance f = 10 mhz 5 r iif2 270 330 400 ? parallel input capacitance f = 10 mhz 5 c iif2 12 pf parallel output resistance f = 10 mhz 3 r oif2 50 k ? parallel output capacitance f = 10 mhz 3 c oif2 7pf voltage regulator regulated voltage 17 v ref 3.7 3.9 4.9 v maximum output current 17 i ref 5ma internal differential resistance, dc 17 /di 17 when i 17 =0 17 r d17 750 ? power supply suppression f = 50 hz 17 psrr 36 50 db electrical characteristics (continued) v s = 8.0 v, f rf = 98 mhz, f osc ? 108.7 mhz, f if = f osc - f rf = 10.7 mhz reference point is ground (pins 2, 8, 14, 20, and 22),t amb = 25c, unless otherwise specified. parameters test conditions pin symbol min. typ. max. unit
17 u4065b 4807a?audr?05/04 figure 24. test circuit agc input voltage thresholds (agc threshold current is 10 a at pin 10) if2 input 5 v thif2 85 86 92 dbv if and detector 9 v thifd 42 43 48 dbv mixer input level of wideband sensor f irf = 100 mhz v at pin 13 = 0 v i through pin 13 = 0 a between 15 and 16 v thwb1 v thwb2 95 85 98 87 100 90 dbv dbv electrical characteristics (continued) v s = 8.0 v, f rf = 98 mhz, f osc ? 108.7 mhz, f if = f osc - f rf = 10.7 mhz reference point is ground (pins 2, 8, 14, 20, and 22),t amb = 25c, unless otherwise specified. parameters test conditions pin symbol min. typ. max. unit if 1 if 2 agc block mixer interference mixer amplifier local oscillator 21 50 1 5 6 2 4.7n 4 20 7 5 2 3 10 i 10 1 5 6 2 v s v o if 50 1 5 6 2 4.7n 4.7n 18 19 14 15 16 24 23 50 v i rf l osc 47p 33p 12 470p r l1 v lobuff f lobuff 1 22 11 1 5 6 2 v o if 50 1 5 6 2 50 v i if 4.7n 1 9 17 6 1 5 6 2 v s 50 1 5 6 2 1 5 6 2 voltage regulator 4.7n 50 4.7n 50 v i if v o if v o if gain if 1 i 18,19 8 i 6 13 i 3 r g15,16 r l18,19 r g21 i 4 r l7 r g5 r l3 r 13 r g9 r g11 r lobuff 1 5 6 2 00 4 50 200 z/ ? rf transformers mcl type tmo 4 - 1 v i if 0 to 140 a r g24 v ref = 4 v il = 0.7 db 8p f osc c osc agc adjust (wide band) i 13 4.7n interference v s v s
18 u4065b 4807a?audr?05/04 local oscillator figure 25. lo principle application figure 26. oscillator swing versus temperature 24 23 f osc 33p 47p v osc24 local oscillator oscillator output buffer 1 v osc1 , f osc 520 t amb r g24 free running oscillator frequency f osc 110 mhz, v osc24 = 160 mv, r g24 = 220 ? , q l = 70 0 20 40 60 80 100 120 140 160 180 -30 -10 10 30 50 70 90 t amb (c) v osc1 (mv)
19 u4065b 4807a?audr?05/04 mixer f osc = 110.7 mhz, v osc24 ? 160 mv, f if = 10.7 mhz figure 27. mixer principle application figure 28. mixer characteristic mixer local oscillator 1 5 6 2 50 1 5 6 2 50 t amb i l1 v o if 18 19 14 15 v s f osc 47p r g24 24 23 f rf1 2 vi rf1 22p i l2 conversion power gain g c = 20 log (v o if/v i rf) + i l1 (db) + i l2 (db) i l1 , i l2 insertion loss of the rf transformers 2 vi rf2 f rf2 0 20 40 60 80 100 120 0 20 40 60 80 100 120 vi rf1 , vi rf2 (dbv) vo if (dbv) conversion characteristic 3rd order im-characteristic
20 u4065b 4807a?audr?05/04 figure 29. conversion power gain of the mixer stage versus temperature figure 30. current of the mixer stage versus temperature 0 1 2 3 4 5 6 7 8 -30 -10 10 30 50 70 90 t amb (c) g c (db) 8.0 8.3 8.6 8.9 9.2 9.5 9.8 10.1 10.4 10.7 11.0 -30 -10 10 30 50 70 90 t amb (c) i 18 , i 19 (ma)
21 u4065b 4807a?audr?05/04 first if preamplifier figure 31. first if preamplifier principle application figure 32. power gain of the first if amplifier versus i 4 1 5 6 2 50 1 5 6 2 50 if 21 7 i 4 t amb i l1 1 : 2 2 : 1 i l2 4 f if vo if r g21 = 200 vi if21 vo if7 v (pin 4) r l7 = 200 2vi if power gain g if = 20 log (vo if /vi if ) + i l1 (db) + i l2 (db) i l1 , i l2 = insertion loss of the rf transformers -5 0 5 10 15 20 25 0 20 40 60 80 100 120 140 i 4 (a) g if (db) t = 90c t = -30c t = 30 c
22 u4065b 4807a?audr?05/04 figure 33. power gain of the first if amplifier versus frequency figure 34. v (pin 4) versus i 4 -10 -5 0 5 10 15 20 25 10 20 30 40 50 60 70 80 90 100 f (mhz) g if1 (db) g max g nom g min 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 0 20 40 60 80 100 120 140 i 4 (a) v 4 (v) t = -30c t = 90c t = 30c
23 u4065b 4807a?audr?05/04 second if preamplifier figure 35. second if preamplifier principle application figure 36. power gain of the second if amplifier versus temperature 1 5 6 2 50 1 5 6 2 50 if t amb i l1 1 : 2 2 : 1 i l2 f if vo if r l3 = 200 330 v s 3 vo if3 vi if5 r g5 = 200 5 2 vi if power gain g if = 20 log (vo if /vi if ) + i l1 (db) + i l2 (db) i l1 ; i l2 = insertion loss of the rf transformers 15.0 15.5 16.0 16.5 17.0 17.5 18.0 18.5 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 t amb (c) g if2 (db)
24 u4065b 4807a?audr?05/04 figure 37. power gain of the second if amplifier versus frequency figure 38. agc threshold (110 = 1 a) of the second if amplifier versus temperature figure 39. agc characteristic of the second if amplifier input 0 2 4 6 8 10 12 14 16 18 20 10 20 30 40 50 60 70 80 90 100 f (mhz) g if2 (db) 86.0 86.2 86.4 86.6 86.8 87.0 -30 -10 10 30 50 70 90 t amb (c) threshold (dbv) 0.01 0.10 1.00 10.00 100.00 1000.00 10000.00 80 85 90 95 100 105 vi if (dba) i 10 (a) 110 (90c)/a 110 (30c)/a 110 (-30c)/a
25 u4065b 4807a?audr?05/04 interference sensor (mixer) figure 40. interference sensor principle application test conditions for characteristic vo if versus vi rf1 : f lo = 100 mhz, f rf1 = 89.3 mhz, vi rf2 = 0, f if = f lo - f rf1 = 10.7 mhz test conditions for 3rd order im-characteristic vo if versus vi rf1 , vi rf2 : f lo = 100 mhz, f rf1 = 89.4 mhz, f rf2 = 89.5 mhz, f if = f lo - (2 f rf1 - 1 f rf2 ) = 10.7 mhz i l1 , i l2 = insertion loss of the rf transformer figure 41. characteristics of the interference sensor (mixer) local oscillator interference mixer 1 5 6 2 50 1 5 6 2 50 i l1 vo if 15 v s 11 r l11 = 200 2 vi rf1 fi rf1 f lo f if r g15/16 = 200 i l2 16 i l1 = i l2 = 0.7 db 2 vi rf2 fi rf2 0 10 20 30 40 50 60 70 80 90 60 65 70 75 80 85 90 95 100 vi rf (dbv) vo if (dbv) conversion characteristic 3rd order im-characteristic
26 u4065b 4807a?audr?05/04 figure 42. conversion characteristic of the interference sensor (mixer) figure 43. third-order interference characteristic of the interference sensor (mixer) 0 10 20 30 40 50 60 70 80 90 100 70 75 80 85 90 95 100 105 110 115 vi rf (dbv) vo if (dbv) -30c 30c 90c 20 30 40 50 60 70 80 70 75 80 85 90 95 100 105 110 115 vi rf (dbv) vo if (dbv) -30c 30c 90c
27 u4065b 4807a?audr?05/04 interference sensor (amplifier) figure 44. interference sensor principle application agc thresholds figure 45. agc threshold of the interference if amplifier versus temperature figure 46. wideband agc threshold (i 10 = 1 a) versus i 13 1 5 6 2 50 t amb i l1 1 : 2 f if r g9 = 200 vi if9 9 10 v s i 10 if i l1 = 0.7 db 2 vi if 41.0 41.5 42.0 42.5 43.0 43.5 44.0 44.5 45.0 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 t amb (c) threshold (dbv 85 90 95 100 105 0 5 10 15 20 25 30 35 40 45 50 55 i 13 (a) vi rf (dbv) 88 mhz 108 mhz 98 mhz
28 u4065b 4807a?audr?05/04 figure 47. wideband agc threshold (i 10 = 1 a) versus temperature agc characteristics figure 48. agc characteristic of the interference if and detector block figure 49. characteristic of the wideband agc (i 13 = 0 v) 80 82 84 86 88 90 92 94 96 98 100 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 t amb (c) vi rf 15/16 u 13 = 0 v i 13 = 30 a i 13 = 0 a 0.01 0.10 1.00 10.00 100.00 1000.00 10000.00 35 45 55 65 75 85 95 vi if (dbv) i 10 (a) -30c 30c 90c 0.01 0.10 1.00 10.00 100.00 1000.00 10000.00 80 85 90 95 100 105 110 115 120 vi if (dbv) i 10 (a) -30c 90c 30c
29 u4065b 4807a?audr?05/04 figure 50. characteristic of the wideband agc (v 13 = 0 v) dc characteristics figure 51. supply current versus supply voltage figure 52. reference voltage versus temperature 0.01 0.10 1.00 10.00 100.00 1000.00 10000.00 90 95 100 105 110 115 120 vi rf (dbv) i 10 (a) -30c 90c 30c 0 2 4 6 8 10 12 14 16 18 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 v s (v) i (ma) i 18 , i 19 i 6 i 3 3.81 3.82 3.83 3.84 3.85 3.86 3.87 3.88 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 t amb (c) v ref (v)
30 u4065b 4807a?audr?05/04 figure 53. supply current versus temperature figure 54. reference voltage versus i 17 0 5 10 15 20 25 30 35 40 -30 -10 10 30 50 70 90 t amb (c) i (ma) i 3 + i 6 + i 18 + i 19 i 6 i 18 , i 19 i 3 3.75 3.80 3.85 3.90 3.95 4.00 -10-8-6-4-2 0 2 4 i 17 (ma) v ref (v)
31 u4065b 4807a?audr?05/04 figure 55. application diagram ( t r a c k i n g a d j . ) r 1 0 1 . 5 k r 4 4 7 0 c 7 1 n a p p r . 8 m a r 7 5 6 k c 1 2 1 8 p r 1 3 1 2 0 k r 1 6 1 5 r 1 9 1 0 k c 2 1 1 n l 6 o s c l 5 i f c f 3 r 1 7 4 7 0 d 5 c 1 8 1 0 0 p r 1 4 1 6 0 k d 4 c 1 3 1 n r 1 1 5 6 k c 8 1 0 p r 6 4 7 k l 2 2 . 2 h r 5 2 2 c 1 0 1 p 5 q 1 l 4 c 1 4 1 n c 1 6 6 . 8 p c 1 7 1 5 0 n c 2 0 2 2 p c 2 2 6 . 8 p c 2 3 4 7 p 1 2 4 u 4 0 6 5 b 1 2 1 3 c 1 1 1 0 n d 3 l 3 r 1 2 2 r 2 1 0 0 d 2 s 3 9 1 d r 3 5 6 k c 5 1 0 n c 1 2 p 7 d 1 s 3 9 2 d c 2 1 n c 3 1 0 n c 4 1 n q 2 b c 8 5 8 c f 1 c f 2 c 1 9 2 2 n r 1 8 3 3 0 r 2 0 2 2 k r 2 1 1 0 0 k g a i n a d j . c 2 4 1 n c f 4 r 1 5 2 2 r 9 2 2 0 r 1 2 3 3 0 k c 1 5 1 0 0 n c 9 4 7 0 n c 6 1 n l 1 2 2 0 n h c 2 5 2 7 p 7 5 ? a n t v a g c v t u n 1 . 7 - 6 . 5 v v s = 8 . 5 v i f o u t l o o u t 1 3 4 6 b f r 9 3 a 1 2 3 4 6 8 2 0 c 2 6 4 . 7 p
32 u4065b 4807a?audr?05/04 part list item description q1 bfr93ar (bfr93a) q2 bc858 d1 s392d d2 s391d d3, d4, d5 bb804 l1 11 turns, 0.35 mm wire, 3 mm diameter (approximately 220 nh) l2 2.2 mh (high q type) l3 toko ? 7kl-type, # 600enf-7251x l4 toko 7kl-type, # 291ens 2341ib l5 toko 7kl-type, # m600bcs-1397n l6 toko 7kl-type, # 291ens 2054ib cf1 toko type skm 2 (230 khz) cf2, cf3, cf4 toko type skm 3 (180 khz)
33 u4065b 4807a?audr?05/04 package information ordering information extended type number package remarks U4065B-AFL so24 plastic ? U4065B-AFL3 so24 plastic taping according to ice-286-3 technical drawings according to din specifications package so24 dimensions in mm 15.55 15.30 2.35 0.4 1.27 13.97 9.15 8.65 0.25 0.10 7.5 7.3 0.25 10.50 10.20 24 13 112
printed on recycled paper. disclaimer: atmel corporation makes no warranty for the use of its products, other than those expressly contained in the company?s standar d warranty which is detailed in atmel?s terms and conditions located on the company?s web site. the company assumes no responsibi lity for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time wi thout notice, and does not make any commitment to update the information contained her ein. no licenses to patents or other intellectual property of atmel are granted by the company in connection with the sale of atmel produc ts, expressly or by implication. atmel?s products are not aut horized for use as critical components in life support devices or systems. atmel corporation atmel operations 2325 orchard parkway san jose, ca 95131, usa tel: 1(408) 441-0311 fax: 1(408) 487-2600 regional headquarters europe atmel sarl route des arsenaux 41 case postale 80 ch-1705 fribourg switzerland tel: (41) 26-426-5555 fax: (41) 26-426-5500 asia room 1219 chinachem golden plaza 77 mody road tsimshatsui east kowloon hong kong tel: (852) 2721-9778 fax: (852) 2722-1369 japan 9f, tonetsu shinkawa bldg. 1-24-8 shinkawa chuo-ku, tokyo 104-0033 japan tel: (81) 3-3523-3551 fax: (81) 3-3523-7581 memory 2325 orchard parkway san jose, ca 95131, usa tel: 1(408) 441-0311 fax: 1(408) 436-4314 microcontrollers 2325 orchard parkway san jose, ca 95131, usa tel: 1(408) 441-0311 fax: 1(408) 436-4314 la chantrerie bp 70602 44306 nantes cedex 3, france tel: (33) 2-40-18-18-18 fax: (33) 2-40-18-19-60 asic/assp/smart cards zone industrielle 13106 rousset cedex, france tel: (33) 4-42-53-60-00 fax: (33) 4-42-53-60-01 1150 east cheyenne mtn. blvd. colorado springs, co 80906, usa tel: 1(719) 576-3300 fax: 1(719) 540-1759 scottish enterprise technology park maxwell building east kilbride g75 0qr, scotland tel: (44) 1355-803-000 fax: (44) 1355-242-743 rf/automotive theresienstrasse 2 postfach 3535 74025 heilbronn, germany tel: (49) 71-31-67-0 fax: (49) 71-31-67-2340 1150 east cheyenne mtn. blvd. colorado springs, co 80906, usa tel: 1(719) 576-3300 fax: 1(719) 540-1759 biometrics/imaging/hi-rel mpu/ high speed converters/rf datacom avenue de rochepleine bp 123 38521 saint-egreve cedex, france tel: (33) 4-76-58-30-00 fax: (33) 4-76-58-34-80 literature requests www.atmel.com/literature 4807a?audr?05/04 ? atmel corporation 2004 . all rights reserved. atmel ? and combinations thereof are the registered tradem arks of atmel corporation or its subsidiaries. toko ? is a registered trademark of toko kabushiki kaisha ta toko, inc. other terms and product names may be the trademarks of others.

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