View ATR4258-ILQH_1550320.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

features ? fm double-conversion system integrated second if filter with software-controlled bandwidth completely integrated fm demodulator soft mute and multipath noise cancellation receiving condition analyzer am up/down-conversion system am preamplifier with agc and stereo capability 3-wire bus controlled search stop signal generation (am and fm) automatic alignment possible pin compatible with atr4255 world tuner, us weatherboard, j-band lead-free package electrostatic sensitive device. observe precautions for handling. description the atr4258 is a highly integrated am/fm front-end circuit manufactured using atmel?s advanced bicmos technology. it represents a complete, automatically adjust- able am/fm front end, containing a double-conversion system for fm and an up/down-conversion receiver for am with if1 = 10.7 mhz and if2 = 450 khz. the front end is suitable for digital or analog af-signal processing. together with the pll u4256bm, an automatically aligned high-performance am/fm tuner can be built. these ics are dedicated for highly sophisticated car radio applications. am/fm receiver ic atr4258 rev. 4838a?audr?10/04
2 atr4258 4838a?audr?10/04 figure 1. block diagram agc am fm osc agc bandgap bus int stop soft mute dev. ana. am dem. agc fm dem. adj. chan. divider automatic adjustment am fm multi- path 7 3 6 1 2 4 5 8 9 10 mpx 12 13 14 15 16 17 18 19 21 if2out 22 23 24 25 26 27 28 29 30 31 multip 33 34 ifagch ifagcl filadj 38 39 oplpf 41 42 43 44 amagc mx1ama gndmx mx1fma mx1fmb oscout gndosc osce oscb fmagc en clk data v57 gnd vs meter mx2lo adjac int smute dev v3p if2in mx2oa mx2ob mx2in v3 if1out if1ami if1ref if1fmi mx1ob mx1oa amplpf v3 v3 mx1amb amvreg divider 2...10 offset noise- blanker 32 36 35 20 37 40 11
3 atr4258 4838a?audr?10/04 pin configuration figure 2. pinning sso44 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 dev if1out v3 if2in v3p mx2in if1ami oplpf gnd smute ifagch ifagcl mx2oa mx2ob if1ref if1fmi filadj mx1ama multip vs mx1oa mx1ob mx1fma mx1fmb mx1amb gndmx fmagc amvreg amagc amplpf meter adjac mpx v57 oscb osce gndosc oscout en clk data if2out int mx2lo
4 atr4258 4838a?audr?10/04 pin description pin symbol function 1mx1fma1 st mixer fm input a 2mx1fmb1 st mixer fm input b 3 mx1amb 1 st mixer am input b 4 gndmx ground 1 st mixer, preamplifier agc 5 fmagc fm preamplifier agc 6 amvreg am control voltage 7 amagc am preamplifier agc 8 amplpf am agc lp filter 9 meter field strength output 10 adjac adjacent channel detection output 11 mpx multiplex signal 12 v57 5.7 v reference voltage 13 oscb oscillator basis 14 osce oscillator emitter 15 gndosc oscillator ground 16 oscout oscillator output 17 en 3-wire bus enable 18 clk 3-wire bus clock 19 data 3-wire bus data 20 if2out 2 nd if amplifier output 21 int interrupt, stop signal 22 mx2lo 10.25 mhz input for 2 nd mixer 23 mx2ob 2 nd mixer output b 24 mx2oa 2 nd mixer output a 25 gnd ground 26 mx2in 2 nd mixer input 27 v3p 3 v reference for ampin, amifagc, control, if2in 28 if2in 2 nd if amplifier input 29 v3 3 v reference for if1out, mx2in 30 if1out 1 st if amplifier output 31 dev deviation detect output, test output 32 oplpf operating point lpf 33 if1ami 1 st if am amplifier input 34 smute soft mute control input 35 ifagch if agc lp filter high time 36 ifagcl if agc lp filter low time constant 37 filadj filter adjust 38 if1fmi 1 st if fm amplifier input 39 if1ref 1 st if & mx1out reference, mx1am a, mx1am b 40 multip multipath detection output 41 mx1ama 1 st mixer am input a 42 vs supply voltage 43 mx1oa 1 st mixer output a 44 mx1ob 1 st mixer output b
5 atr4258 4838a?audr?10/04 functional description the atr4258 implements an am up/down-conversion reception path from the rf input signal to the am-demodulated audio frequency output signal, and for fm/wb reception a double-conversion reception path from the rf input signal to the fm-demodulated multiplex signal (mpx). a vco and an lo prescaler for am are integrated to generate the lo frequency for the 1 st mixer. automatic gain control (agc) circuits are imple- mented to control the preamplifier and if stages in the am and fm reception path. for improved fm performance, an integrated if filter with adjustable bandwidth, a soft- mute feature and an automatic multipath noise cancellation (mnc) circuit are fully integrated. a powerful set of sensors is provided for receiving condition analysis and stop signal generation. several register bits (bit 0 to bit 93) are used to control circuit operation and to adapt certain circuit parameters to the specific application. the control bits are organized in two 8-bit and three 24-bit registers that can be programmed by the 3-wire bus protocol. the bus protocol and the bit-to-register mapping is described in the section ?3-wire bus description? on page 20. the meaning of the c ontrol bits is mentioned in the following sections. the integrated vco has a high frequency range. additionally the vco has a special vco divider which allows (in connection with the vco) the reception of all analog world bands. reception mode the ic can be operated in four different modes. mode am, fm, wb, and standby are selected by means of bit 92 and bit 93 according to table 1 on page 6. additionally to the operating modes, the signal paths can be set separately. bit 62 selects the first mixer and agc, bit 63 selects the 1 st amplifier stage. the recommended settings of bit 62 and bit 63 are included in table 1 on page 6. in am mode the am mixer, the am rf-agc and the 1 st if am amplifier at pin 33 are activated. the input of the 2 nd if amplifier is connected to pin 28 and the output of the 2 nd if amplifier is fed to the am demodulator. the output of the am demodulator is available at mpx output pin 11. in fm mode the fm mixer, the fm rf-agc and the 1 st if fm amplifier at pin 38 are acti- vated. the bandwidth of the output tank at pin 23, pin 24 is increased and the input of the 2 nd if amplifier can be switched between pin 23 and pin 24 and pin 28. the output of the 2 nd if amplifier is fed to the integrated band filter and fm demodulator. the output of the fm demodulator is available at mpx output pin 11. the wb mode is similar to the fm mode, but to reduce the bandwidth the am if ampli- fier with the am filter (bit 63 = 1) can be used. in wb mode the range of the integrated filter bandwidth control is shifted to lower bandwidth and the gain of the fm demodulator is increased. in standby mode the mixers, if amplifiers and agc circuits are deactivated to reduce current consumption.
6 atr4258 4838a?audr?10/04 test mode a special test mode is implemented for final production test only. this mode is activated by setting bit 9 = 1. this mode is not intended to be used in customer applications. for normal operation, bit 9 has to be set to 0. bit 22 to bit 30 are deactivated in normal operation mode. vco/local oscillator prescaler an oscillator circuit is implemented to build a vco as proposed in the application sche- matic. the vco frequency is used to generate the lo frequency of the 1 st mixer stages. the control voltage of the vco is usually generated by the pll circuit u4256bm. the vco frequency has a range of 70 mhz to 250 mhz to allow the reception of all analog world bands. a main element of the implemented oscillator circuit is a bipolar npn transistor. the internally biased base is connected to pin 13 and the emitter to pin 14. an agc circuit (bit 30) can be activated to increase the emitter current until the appropriate oscillation level is reached. the fundamental emitter current can be changed by bit 52. in addition (to the am prescaler) a special vco prescaler is implemented for all modes (am, wb and fm). the divider factor of t he prescaler buffer provides the signal of the buffered output (at pin 16) and the prescaler vco provides the signal of the 1 st fm mixer stage and am prescaler. examples of vco prescaler settings are described in section ?application information? on page 29. the divider factor of the vco and buffer prescaler can be selected according table 5 on page 7. table 1. operating mode am/fm/weather channel bit 93 bit 92 bit 63 bit 62 standby 0 0 x x fm 0100 am 1011 weather band 1 1 1 0 table 2. test mode mode bit 9 normal operation 0 te s t m o d e 1 table 3. local oscillator agc local oscillator (vco) bit 30 agc off (default) 0 agc on 1 table 4. local oscillator gain local oscillator (vco) bit 52 low gain 0 high gain 1
7 atr4258 4838a?audr?10/04 note: the u4256 fmoscin (pin 19) input frequency is limited to 160 mhz. fm rf-agc the fm rf-agc circuit includes a wide-band level detector at the input pin 1 of the fm mixer and an in-band level detector at the output of the fm if amplifier (pin 30). the out- puts of these level detectors are used to control the current into the pin diode (see figure 3) in order to limit the signal level at the fm mixer input and the following stages. the maximum pin diode current is determined by r115 and the time constant of the agc control loop can be adjusted by changing the value of c111. the agc threshold level at the input of the fm mixer can be adjusted by bit 64 and bit 65 according to table 6. the in-band agc threshold refers to the fm mixer input (pin 1, pin 2) depends on the gain of the fm if amplifier and can be adjusted by bit 89 to bit 91. figure 3. fm rf-agc bit 92 table 5. local oscillator prescaler (vco/buffer divider) prescaler vco prescaler buffer bit 12 bit 11 bit 10 11x00 1.5 3 001 1.5 1.5 101 22x10 33x11 table 6. fm-agc threshold fm-agc threshold bit 65 bit 64 100 dbv 0 0 97 dbv 0 1 94 dbv 1 0 91 dbv 1 1 agc b92 pin diode vs pin 42 pin 5 c111 r115
8 atr4258 4838a?audr?10/04 am rf-agc the am rf-agc controls the current into the am pin diodes (pin 7) and the source drain voltage of the mosfet in the am preamplifier stage (pin 6) to limit the level at the am mixer input (pin 3, pin 41). this threshold level can be set by bit 64 and bit 65. if the level at the am mixer input exceeds the selected threshold, the current into the am pin diodes is increased. if this step is not sufficient, the source drain voltage of the mosfet is decreased. the time constant of the agc control loop can be adjusted by changing the value of the capacitor at pin 8. fm 1 st mixer in the 1 st fm mixer stage, the fm reception frequency is down converted to the 1 st if frequency. the vco frequency is used as lo frequency for the mixer. am 1 st mixer the am 1 st mixer is used for up-conversion of the am reception frequency to the 1 st if frequency. therefore, an am prescaler is implemented to generate the necessary lo frequency from the vco frequency. the divide factor of the am prescaler can be selected according to table 8. (the am prescaler is only active in am mode). table 7. am-agc threshold am-agc threshold bit 65 bit 64 91 dbv 0 0 94 dbv 0 1 97 dbv 1 0 100 dbv 1 1 table 8. divide factor of the am prescaler divider (am prescaler) bit 93 bit 92 bit 84 bit 83 bit 82 bit 81 divide by 2 100000 divide by 3 100001 divide by 4 100010 divide by 5 100011 divide by 6 100100 divide by 7 100101 divide by 8 100110 divide by 9 100111 divide by 10 101xxx
9 atr4258 4838a?audr?10/04 fm 1 st if amplifier a programmable gain amplifier is used in fm (and wb) mode between pin 38 and pin 30 to compensate the loss in the external ceramic band filters. the gain of this amplifier is adjusted by bit 89 to bit 91. the input and the output resistance is 330 ? and fits to external ceramic filters. two different temperature coefficients of the fm if amplifier can be selected by bit 66. am 1 st if amplifier in am and wb mode, the gain of the 1 st if amplifier is controlled by the if-agc to extend the control range of the if-agc. 2 nd mixer the 2 nd mixer is used in am, fm and wb mode. the mixer input has 330 ? input resis- tance and can be connected directly to an external ceramic filter. in fm mode, the high output resistance of the second mixer is reduced to increase the bandwidth of the tank at the mixer output. the output resistance can be selected by bit 60 and bit 61. in am and wb mode bit 61 and bit 62 should be set to 0. the lo frequency of the 2 nd mixer (10.25 mhz) has to be applied at pin 22. this signal is usually generated by the pll circuit u4256bm. table 9. gain of the fm if amplifier gain fm if bit 91 bit 90 bit 89 19 db 0 0 0 21 db 0 0 1 23 db 0 1 0 25 db 0 1 1 27 db 1 0 0 28 db 1 0 1 29 db 1 1 0 30 db 1 1 1 table 10. temperature coefficient setting of fm if amplifier temperature coefficient (tc) of the if amplifier bit 66 tk min (tk 1) 0 tk max (tk 2) 1 table 11. 2 nd mixer output resistance in fm mode bit 61 bit 60 output resistance (bit 54 = 0) output resistance (bit 54 = 1) 00 3.3 k ? ~100 k ? 0 1 0.63 k ? 0.78 k ? 1 0 0.47 k ? 0.55 k ? 1 1 0.29 k ? 0.32 k ?
10 atr4258 4838a?audr?10/04 note: the bandwidth is also dependant on the values of the application circuit. 2 nd if amplifier in am and wb mode, the input of the second if amplifier is pin 28, is externally con- nected to the 2 nd mixer tank through the am ceramic filter to achieve channel selectivity. during normal fm operation (bit 54 = 0), the input of the second if amplifier is con- nected to the 2 nd mixer output (pin 23, pin 24) and the integrated fm band filter is used for channel selectivity only. it is possible to use an additional external filter between the 2 nd mixer tank and pin 28 in fm mode by setting bit 54 to 1. if-agc the if-agc controls the level of the 2 nd if signal that is passed to the am demodulator input or the integrated fm band filter and to the 2 nd if output, pin 20. two different time constants of the if-agc can be selected by the capacitors at pin 35 (ifagch) and pin 36 (ifagcl). the short time constant (ifagcl) is used in fm/wb mode and in am search mode. the long time constant (ifagch) is used for am reception. in fm/wb mode, the output signal of the fm demodulator is applied to pin 35 via a series resistor of about 95 k ? . this low-pass filtered output signal of the fm demodula- tor is used for the fm demodulator fine adjustment, for muting and as a reference for the deviation sensor. table 12. fm bandwidth mixer 2 bit 61 bit 60 fm bandwidth mixer 2 0 0 150 khz 0 1 200 khz 1 0 250 khz 1 1 450 khz table 13. 2 nd if filter in fm mode 2nd if filter bit 54 internal filter 0 external and internal filter 1 table 14. if-agc time constant mode bit 92 bit 88 if agc time constant fm/wb 1 x ifagcl (fast) am reception 0 0 ifagch (slow) am search 0 1 ifagcl (fast)
11 atr4258 4838a?audr?10/04 2 nd if output the 2 nd if after the gain-controlled 2 nd if amplifier is available at pin 20 (bit 55 = 0). in am mode, this signal may be used for an exte rnal am stereo decoder. alternatively, a signal corresponding to the logarithmic field strength after the integrated fm band filter, which is used for multipath detection, can be switched to pin 20 by setting bit 55 = 1. automatic if center frequency adjustment integrated active filters are used in the fm band filter, fm demodulator and adjacent channel sensor. the center frequency of these filters is automatically adjusted to the second if frequency of 450 khz. the frequency of 10.25 mhz at pin 22 is used as a reference for this alignment. figure 4. automatic if center frequency adjustment for fine tuning, the center frequency of all these integrated active filters (band filter and demodulator) can be shifted in steps of 6.25 khz by means of bit 56 to bit 59. addition- ally, the center frequency of the band filter can be adjusted separately by means of bit 14 to bit 17. table 15. pin 20 output setting pin 20 bit 55 2 nd if output 0 multipath field strength 1 automatic frequency adjustment fm-demod fm- band filter bit 56...59 10.25 mhz bit 14...17 center frequency center frequency pin 37 pin 22
12 atr4258 4838a?audr?10/04 table 16. 2 nd if center frequency if center bit 59 bit 58 bit 57 bit 56 450.00 khz 0 0 0 0 456.25 khz 0 0 0 1 462.50 khz 0 0 1 0 468.75 khz 0 0 1 1 475.00 khz 0 1 0 0 481.25 khz 0 1 0 1 487.50 khz 0 1 1 0 493.75 khz 0 1 1 1 450.00 khz 1 0 0 0 443.75 khz 1 0 0 1 437.50 khz 1 0 1 0 431.25 khz 1 0 1 1 425.00 khz 1 1 0 0 418.75 khz 1 1 0 1 412.50 khz 1 1 1 0 406.25 khz 1 1 1 1 table 17. fm band filter center frequency correction if correction bit 17 bit 16 bit 15 bit 14 -0 khz 000 0 -6.25 khz 000 1 -12.50 khz 001 0 -18.75 khz 001 1 -25.00 khz 010 0 -31.25 khz 010 1 -37.50 khz 011 0 -43.75 khz 011 1 +0 khz (default) 1 0 0 0 +6.25 khz 100 1 +12.50 khz 1 0 1 0 +18.75 khz 1 0 1 1 +25.00 khz 1 1 0 0 +31.25 khz 1 1 0 1 +37.50 khz 1 1 1 0 +43.75 khz 1 1 1 1
13 atr4258 4838a?audr?10/04 integrated fm band filter for fm reception a band filter with variable bandwidth is integrated in front of the demodulator to provide channel selectivity on the 2 nd if. the bandwidth of this filter can be adjusted by bit 0 to 3 (see table 18) to be suitable for the present receiving condition. in wb mode, the bandwidth of the integrated filter is shifted to lower bandwidth values, while the necessary channel selectivity is achieved by an external ceramic filter. the center frequency of the integrated fm band filter can be adjusted by means of bit 14 to 17. the field strength after the integrated fm band filter that is available at pin 20 (bit 55 = 1) can be used for this purpose. fm demodulator for weather band reception, the gain of the fm demodulator is increased and can be adjusted by means of bit 71 and bit 72 in order to increase the output voltage to com- pensate the low frequency deviation in weather band. an integrated demodulator fine adjustment allows automatic fine tuning of the demodu- lator center frequency to the average frequency of the received signal. this feature is implemented for use in weather band mode and can be activated by setting bit 53 to 0. figure 5. fm demodulator automatic fine tuning table 18. bandwidth of the integrated band filter if bandwidth fm if bandwidth wb bit 3 bit 2 bit 1 bit 0 220 195 0 0 0 0 ... ... ... ... ... ... 200 160 0 0 1 1 ... ... ... ... ... ... 165 120 0 1 1 0 ... ... ... ... ... ... 130 80 100 1 ... ... ... ... ... ... 80 35 1 1 0 1 70 ? 111 0 60 ? 111 1 fm demod + am agc b92 center freq. bit 53 automatic frequency adjustment mpx (pin 11) ifagch (pin 35) v3p (pin 27)
14 atr4258 4838a?audr?10/04 the center frequency of the fm demodulator can be adjusted by means of bit 56 to 59. at the center frequency, the dc voltage at the mpx output pin 11 is equal to the mpx offset voltage that can be measured at pin 11 while mpx mute is active (bit 7 = 1). this adjustment will affect the center frequency of all integrated filters as mentioned before. soft mute the soft mute functionality is implemented to reduce the output level of the fm demodu- lator at low input signal levels to limit the noise at the mpx output in this case. if the input level falls below an adjustable threshold continuously, the output of the fm demod- ulator is continuously muted with decreasing input level until a maximum mute value is reached. the threshold for the start of soft mute and the maximum mute can be adjusted. the signal level for 3 db mute can be set by means of bit 68 to bit 70 and the maximum value for soft mute can be selected by bit 67. the steepness and the time constant of the soft mute can be adjusted by the resistor and capacitor between pin 34 and pin 29. the field strength signal available at pin 9 is used for soft mute. therefore, the soft mute threshold that referred to the input of the fm mixer depends on the gain from the fm mixer input to the field strength sensor and on the setting of field strength offset (bit 15 to bit 21). table 19. demodulator gain in weather band mode demodulator gain in weather band mode relative to fm mode bit 72 bit 71 14 db 0 0 17 db 0 1 21 db 1 0 23 db 1 1 table 20. demodulator fine adjustment demodulator fine adjustment bit 53 fine tuning on 0 fine tuning off 1 table 21. soft mute threshold relative soft mute threshold bit 70 bit 69 bit 68 soft mute off 0 0 0 -18 db 0 0 1 -15 db 0 1 0 -12 db 0 1 1 -9 db 1 0 0 -6 db 1 0 1 -3 db 1 1 0 0 db 1 1 1
15 atr4258 4838a?audr?10/04 figure 6. soft mute mpx output the output of the am demodulator (am mode) or the output of the fm demodulator (fm/wb mode) are available at the mpx output (pin 11). the mpx output signal can be muted by setting bit 7 to 1. the bandwidth of the low-pass filter at the mpx output can be set by means of bit 79 to 90 khz or 180 khz. receiving condition analyzer the atr4258 implements several sensors that provide information about the receiving condition of the selected station. table 22. maximum soft mute maximum value of soft mute bit 67 30 db 0 26 db 1 pin 34 pin 29 + v3 bit 67 fs (pin 9) bits 68 to 70 gain fm demodulator table 23. mpx output mute mpx output bit 7 mpx out, pin 11 normal operation 0 mute on 1 table 24. mpx output bandwidth bandwidth mpx low-pass filter bit 79 90 khz 0 180 khz 1
16 atr4258 4838a?audr?10/04 field strength sensor the field strength sensor provides a dc voltage at pin 9 which represents the logarith- mic field strength of the signal in the reception band. the field strength information can be retrieved either from a level detector at the input of the 2 nd mixer (pin 26) or from the if-agc depending on the setting of bit 80. the band- width of the field strength detection in the agc is smaller than by using the level detector because of additional selectivity between the 2 nd mixer and the 2 nd if amplifier particularly in am and wb, but the field strength detection in the agc is limited to the if agc range. usually the field strength from the level detector is used in fm/wb mode and the agc field strength is used in am mode. the field strength output at pin 9 can be adjus ted by the bits 18 to 21 in 0.5 db steps. this offset also has an influence on the soft mute levels. field strength selection bit 80 and bit 13 allows the switches between narrow-band field strength and wide-band field strength information. search stop detector a search stop detector is available in am and fm/wb mode. a stop condition is signaled (with a low level at pin 21) if the frequency of the if signal is within a window around the center frequency of 450 khz. the width of this search stop window can be set by bit 85 to bit 87 in the range of 0.5 khz to 80 khz. the frequency of the if signal is measured by counting the number of periods of the if signal during a measurement time which is determined by bit 73 to bit 78. the inverted stop signal is available at pin 21 according to table 29 on page 17. the frequency of 10.25 mhz at pin 22 is used as a time reference. table 25. field strength offset offset field strength bit 21 bit 20 bit 19 bit 18 0.0 db 0 0 0 0 0.5 db 0 0 0 1 1.0 db 0 0 1 0 ... ... ... ... ... 7.5 db 1 1 1 1 table 26. field strength (combined) field strength (pin 9) narrow-band/wide-band bit 80 bit 13 fm field strength (wide band) 0 0 multipath field strength and fm field strength (wide band) 0 1 am agc field strength (narrow band) 1 0 multipath field strength and am agc field strength (narrow band) 1 1 table 27. search stop detector measurement time time window for stop signal bit 78 bit 77 bit 76 bit 75 bit 74 bit 73 1 3.1969 ms 0 0 0 0 0 1 ..... 63 3.1969 ms 1 1 1 1 1 1
17 atr4258 4838a?audr?10/04 note: mpint = multipath interrupt, stop and mpint signal are active low pin 35 (ifagch) is carried along with pin 36 (ifagcl) to avoid crackles during a change of the search stop mode to the am reception mode. deviation sensor the deviation sensor is active in am and fm/wb mode and measures the modulation of the signal. it is implemented as a peak detector of the low-pass-filtered mpx signal (see figure 7). the output voltage at pin 31 is proportional to the frequency deviation in fm/wb or the modulation depth in am respectively. figure 7. deviation sensor table 28. search stop window search stop window bit 87 bit 86 bit 85 0.5 khz 0 0 0 1.1 khz 0 0 1 2.3 khz 0 1 0 4.8 khz 0 1 1 10 khz 1 0 0 20 khz 1 0 1 40 khz 1 1 0 80 khz 1 1 1 table 29. signals available at digital output pin 21 bit 88 bit 92 int (pin 21) 00 (am) 1 0 1 (fm/wb) not mpint 10 (am) not stop 1 1 (fm/wb) not (stop and not mpint) + 4k mpx 25k pin 31
18 atr4258 4838a?audr?10/04 adjacent channel sensor the adjacent channel sensor is active in fm mode only and measures the field strength outside the reception band. figure 8. adjacent channel sensor mpint and adjac reset bit 6 allows a resets of the multipath s ensor and the adjacent channel sensor by con- necting pin 10 and pin 40 internally to gr ound and so the external capacitors can be discharged very quickly. multipath sensor the multipath sensor is active in fm mode only and measures the disturbance due to multipath reception. the multipath sensor detects drops in the field strength after the integrated band filter by calculating the difference between an averaged maximum field strength and the current field strength. the maximum depth of these drops is repre- sented by the voltage of the peak detector at pin 40 (multip). the level of this voltage represents the degree of disturbance in the received signal. figure 9. multipath sensor + pin 10 (adjac) smeter 30 a if pin 9 (meter) table 30. multipath and adjacent channel reset mpint and adjacent channel (pin 10 and pin 40) bit 6 normal mode 0 connection to ground 1 4k + pin 40
19 atr4258 4838a?audr?10/04 a multipath noise canceller (mnc) is implemented to reduce disturbance of the received signal in multipath reception conditions. if the difference between the momen- tary and the averaged field strength falls below a threshold adjustable by bit 81 to 84 (see table 32), the mpx signal may be muted and this situation (mpint) can be signal- ized at pin 21 (int) according to table 29 on page 17. muting of the mpx signal during multipath disturbances can be activated be setting bit 8. the multipath interrupt can also be switched on/off by bit 4. table 31. multipath noise canceller multipath noise canceller bit 8 active 0 not active 1 table 32. sensitivity of the mnc sensitivity mnc (threshold) bit 84 bit 83 bit 82 bit 81 off 0000 low 0 0 0 1 ... ... ... ... ... (-33 db) 0 0 1 1 ... ... ... ... ... normal (-14 db) 0 1 1 1 ... ... ... ... ... high (-9 db) 1 1 1 1 note: valid in fm or wb mode (bit 92 = 1) table 33. multipath interrupt (mpint) mpint (pin 21) bit 4 off 0 on (mpint active) 1
20 atr4258 4838a?audr?10/04 am noise blanker the am noise blanker of the atr4258 can be activated by bit 5. the noise peak is detected in the field strength of the first if and if the disturbance exceeds the level defined by the bits 85 to 87, the signal is muted at the second if. 3-wire bus description the register settings of the atr4258 are programmed by a 3-wire bus protocol. the bus protocol consists of separate commands. a defined number of bits are transmitted sequentially during each command. one command is used to program all bits of one register. the different registers avail- able (see table 36 on page 22) are addressed by the length of the command (number of transmitted bits) and by three address bits t hat are unique for each register of a given length. 8-bit registers are programmed by 8-bit commands and 24-bit registers are pro- grammed by 24-bit commands. each bus command starts with a rising edge on the enable line (en) and ends with a falling edge on en. en has to be kept high during the bus command. the sequence of transmitted bits during one command starts with the lsb of the first byte and ends with the msb of the last byte of the register addressed. the data is evaluated at the rising edges of clk. the number of low to high transitions on clk during the high period of en is used to determine the length of the command. the bus protocol and the register addressing of the atr4258 are compatible to the addressing used in the u4256bm. that means both the atr4258 and u4256bm can be operated on the same 3-wire bus as shown in the application circuit (figure 20 on page 36). table 34. am noise blanker activation am noise blanker bit 5 off 0 on 1 table 35. sensitivity of am noise blanker am noise blanker sensitivity bit 87 bit 86 bit 85 low 0 0 0 ..... ... ... ... normal 0 1 1 ... ... ... ... high 1 1 1
21 atr4258 4838a?audr?10/04 figure 10. pulse diagram figure 11. bus timing 8-bit command en clk data lsb msb byte 1 24-bit command clk data lsb lsb msb msb byte 3 byte 2 msb lsb byte 1 en t r t s t hda enable data clock t r t s t r t h t l t f t f t f t hen
22 atr4258 4838a?audr?10/04 data transfer table 36. control registers a24_100 msb byte 3 lsb msb byte 2 lsb msb byte 1 lsb addr. demodulator am/fm/wb gain fm if amplifier search width of window am osc divider/multipath sensitivity field strength bw/ mpx/ lpf/ time window stop signal 100 b93 b92 b91 b90 b89 b88 b87 b86 b85 b84 b83 b82 b81 b80 b79 b78 b77 b76 b75 b74 b73 a24_101 msb byte 3 lsb msb byte 2 lsb msb byte 1 lsb addr. wb- demod-gain start soft mute threshhold soft mute depth tk- fm if agc threshold am/fm if1 ampl. am/ fm 1 st mixer + agc am/ fm bw 2 nd mixer int. if2 reference shift ifout pin 20 if2in pin 28 dem. contr. gain local osc 101 b72 b71 b70 b69 b68 b67 b66 b65 b64 b63 b62 b61 b60 b59 b58 b57 b56 b55 b54 b53 b52 a24_111 msb byte 3 lsb msb byte 2 lsb msb byte 1 lsb addr. agc local osc do not change (test mode bits) offset field strength (pin 9) band-path filter fieldst. (pin 9) local osc prescaler (vco buffer) 1110 0000 0 0 00 b30 b29 b28 b27 b26 b25 b24 b23 b22 b21 b20 b19 b18 b17 b16 b15 b14 b13 b12 b11 b10 a8_100 msb byte 1 lsb addr. test mode mp mute (pin 11) reset mp/ adj noise- blanker 1000 b9 b8 b7 b6 b5 a8_101 msb byte 1 lsb addr. mp int band-path filter band width 101 b4 b3 b2 b1 b0
23 atr4258 4838a?audr?10/04 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 . all voltages are referred to gnd (pin 25) parameters symbol value unit supply voltage, pin 42 v s 10 v power dissipation p tot 1000 mw junction temperature t j 150 c ambient temperature range t amb -40 to +85 c storage temperature range t stg -50 to +150 c thermal resistance parameters symbol value unit junction ambient, soldered to pcb r thja 60 k/w operating range all voltages are referred to gnd (pin 25) parameters symbol min. typ. max. unit supply voltage range, pin 42 v s 8.0 8.5 10 v ambient temperature t amb -40 +85 c electrical characteristics test conditions (unless otherwise specified): v s = 8.5 v, t amb = 25c no. parameters test conditions pin symbol min. typ. max. unit type* 1 power supply 1.1 supply voltage 42 v s 8.0 8.5 10 v c 1.2 supply current standby mode (bit 92 = 0, bit 93 = 0) 42 i stby 35 45 ma a 1.3 supply current other operation modes 42 i s 50 65 ma a 2 vco (bit 52 = 0, bit 30 = 1) 2.1 frequency range f vco 70 260 mhz d 2.2 dc bias voltage 13 3.4 3.7 4.0 v a 2.3 buffer output voltage f osc = 120 mhz 16 250 mvrms c 2.4 buffer output resistance 16 70 ? d 2.5 buffer output dc voltage 16 3.8 4.1 4.4 v a 3fm rf-agc 3.1 saturation voltage no input signal 5 8.3 v a 3.2 saturation voltage no input signal 5 v s - 0.2 v b *) type means: a =100% tested, b = 100% correlation tested, c = characterized on samples, d = design parameter
24 atr4258 4838a?audr?10/04 3.3 threshold level in-band signal 30 115 dbv c 3.4 maximum threshold level out-of-band signal (110 mhz), bit 64, 65 = 0 1 100 103 106 dbv b 4 am rf-agc, am mode (bit 92 = 0, bit 93 = 1) 4.1 saturation voltage no input signal 7 8.3 v c 4.2 saturation voltage no input signal 7 v s - 0.2 v c 4.3 output voltage for minimum gain bit 92 = 1 7 6.5 6.8 7.1 v c 4.4 output voltage for minimum gain bit 92 = 1 7 v s - 1.7 vc 4.5 maximum control voltage no signal 6 6.5 7.0 7.5 v a 4.6 maximum control voltage no signal 6 v s - 1.5 v b 4.7 minimum control voltage agc active 6 0.2 0.8 v a 4.8 maximum threshold level bits 64, 65 = 1 41 97 99 102 dbv a 5 am mixer, am mode (bit 92 = 0, bit 93 = 1) 5.1 supply current sum of current in pins 43, 44 43, 44 14 16 20 ma a 5.2 conversion conductance 3, 41, 43, 44 4.1 ms d 5.3 3 rd -order input intercept point pin 3 ac-grounded 41 ip3 ammix 132 dbv c 5.4 noise figure (ssb) generator resistance 2.5 k ? (pin 41) 43, 44 nf ammix 12 db c 5.5 input bias dc voltage 3, 41 2.45 2.8 3.1 v a 5.6 input resistance single-ended, pin 39 ac-grounded 3, 41 13 k ? d 5.7 input capacitance 3, 41 3 pf d 5.8 maximum output voltage differential 43, 44 12 vpp d 5.9 output resistance 43, 44 100 k ? d 6 fm mixer (fm mode (bit 92 = 1, bit 93 = 0) 6.1 supply current sum of current in pins 43, 44 43, 44 12 15 20 ma a 6.2 conversion conductance 1, 2, 43, 44 7msd 6.3 3 rd -order intercept point 1, 2 ip3 fmmix 125 dbv c 6.4 noise figure (dsb) generator resistance 200 ? 43, 44 nf fmmix 10 db c electrical characteristics (continued) test conditions (unless otherwise specified): v s = 8.5 v, t amb = 25c no. parameters test conditions pin symbol min. typ. max. unit type* *) type means: a =100% tested, b = 100% correlation tested, c = characterized on samples, d = design parameter
25 atr4258 4838a?audr?10/04 6.5 input resistance 1, 2 1.6 k ? d 6.6 input capacitance pin 2 ac-grounded 1 5 pf d 6.7 maximum differential output voltage v s = 8.5 v 43, 44 12 vpp d 6.8 output resistance 43, 44 100 k ? d 71 st if fm amplifier, fm mode (bit 92 = 1, bit 93 = 0) 7.1 minimum voltage gain bits 89, 90, 91 = 0 38, 30 19 21 23 db b 7.2 temperature coefficient of gain bit 66 = 0 tk min 0.039 db/k d 7.3 temperature coefficient of gain bit 66 = 1 tk max 0.044 db/k d 7.4 input resistance pin 39 ac-grounded 38 270 330 400 ? d 7.5 input capacitance pin 39 ac-grounded 38 5 pf d 7.6 output resistance 30 270 330 400 ? d 81 st if am amplifier, am mode (bit 92 = 0, bit 93 = 1) 8.1 maximum voltage gain 330 ? load at pin 30 30, 33 16 db d 8.2 gain control range 26 db d 8.3 noise figure generator resistance 2.5 k ? nf ifam 17 db d 8.4 input resistance 33 10 k ? d 8.5 input capacitance pin 39 ac-grounded 33 1 pf d 8.6 output resistance 30 270 330 400 ? d 92 nd mixer 9.1 fm supply current bit 92 = 1, bit 93 = 0 23, 24 10 12 16 ma a 9.2 am/wb supply current bit 92 = 0, bit 93 = 1 23, 24 7 8 10 ma a 9.3 conversion conductance 26, 23, 24 2msd 9.4 noise figure (ssb) generator resistance 330 ? (pin 26) 23, 24 nf mix2 23 db c 9.5 3 rd -order input intercept point 26 ip3 mix2 132 dbv c 9.6 am/wb output resistance bit 92 = 0, bit 93 = 1 23, 24 100 k ? d 9.7 maximum differential output voltage am/wb v s = 8.5 v 23, 24 12 vpp d 9.8 maximum differential output voltage fm 23, 24 1 vpp d 9.9 input resistance 26 270 330 400 ? d 9.10 lo input voltage 22 80 500 mvpp d electrical characteristics (continued) test conditions (unless otherwise specified): v s = 8.5 v, t amb = 25c no. parameters test conditions pin symbol min. typ. max. unit type* *) type means: a =100% tested, b = 100% correlation tested, c = characterized on samples, d = design parameter
26 atr4258 4838a?audr?10/04 9.11 lo input resistance 22 1 k ? d 9.12 lo input bias voltage 22 2.8 3.0 3.2 v a 10 2 nd if amplifier (bit 55 = 0) 10.1 input resistance pin 27 ac-grounded 28 3 k ? d 10.2 voltage gain am/wb mode (bit 93 = 1) pin 28 1 mvrms 28, 20 42 45 48 db a 10.3 gain control range am/wb mode (bit 93 = 1) 47 db d 10.4 dc output voltage 20 3.4 3.7 4.0 v a 10.5 ac output voltage unmodulated signal, 82 dbv at pin 1 (if agc active) bit 93 = 1 20 150 180 230 mvrms a 10.6 output impedance small signal 20 70 ? d 11 fm demodulator integrated band-filter, fm mode (bit 92 = 1, bit 93 = 0), bw setting 2 nd if filter = 120 khz 11.1 ac output voltage deviation = 75 khz, f mod = 1 khz 11 420 480 540 mvrms b 11.2 stereo roll-off deviation = 75 khz, f mod = 38 khz (reference: 1 khz) 11 -2.0 db d 11.3 total harmonic distortion deviation = 75 khz, f mod = 1 khz 11 thd fm 0.4 0.7 % a 11.4 maximum signal-to- noise ratio dev. = 22.5 khz, f mod = 1 khz, 50 s de-emphase, signal input at 450 khz 11 (s/n) fm 65 db c 12 soft mute, fm mode (bit 92 = 1, bit 93 = 0, bit 80 = 0) 12.1 mute gain bit 67 = 0, v (pin 34) = 2 v 11 -28 -26 -24 db a 12.2 mute gain bit 67 = 1, v (pin 34) = 2 v 11 -24 -22 -20 db a 13 am demodulator, am mode (bit 92 = 0, bit 93 = 1) 13.1 ac output voltage modulation depth = 30%, f mod = 1 khz 11 135 150 170 mvrms a 13.2 total harmonic distortion modulation depth = 80%, f mod = 1 khz v(pin 35) = const. 11 thd am 0.6 2 % a 13.3 maximum signal-to-noise ratio modulation depth = 30%, f mod = 1 khz 74 dbv at pin 41 11 (s/n) am 54 db c 14 mpx output 14.1 dc output voltage bit 7 = 1 11 2.1 2.3 2.5 v a electrical characteristics (continued) test conditions (unless otherwise specified): v s = 8.5 v, t amb = 25c no. parameters test conditions pin symbol min. typ. max. unit type* *) type means: a =100% tested, b = 100% correlation tested, c = characterized on samples, d = design parameter
27 atr4258 4838a?audr?10/04 14.2 mute gain bit 7 = 1, fm dev. = 75 khz, f mod = 1 khz 11 -65 -50 db a 14.3 output resistance small signal 11 60 ? d 15 search stop detector, int output 15.1 low saturation voltage 21 0 0.5 v a 15.2 low output resistance 21 0.3 k ? d 15.3 high saturation voltage 21 4.5 4.8 5.25 v a 15.4 high output resistance 21 1k ? d 16 deviation sensor, fm mode (bit 92 = 1, bit 93 = 0) 16.1 offset voltage fm dev. = 0 khz fm demodulator adjusted 31 0.2 v c 16.2 output voltage fm dev. = 75 khz, f mod = 1 khz 31 1.7 2.0 2.5 v c 17 field strength sensor, fm mode (bit 92 = 1, bit 93 = 0, bit 89 to 91 = 0, bit 80 = 0, bit 18 to 21 = 0) 17.1 output voltage 60 dbv at pin 33 9 0.8 1.3 1.8 v a 17.2 output voltage unmodulated signal 100 dbv at pin 33 92.83.43.9va field strength sensor, am mode (bit 92 = 0, bit 93 = 1, bit 80 = 1, bit 18 to 21 = 0) 17.3 output voltage low field strength 60 dbv at pin 28 9 1.5 1.8 2.1 v a 17.4 output voltage high field strength 94 dbv at pin 28 9 3.0 3.3 3.6 v a 18 multipath sensor, fm mode (bit 92 = 1, bit 93 = 0) 18.1 offset voltage unmodulated signal, 60 dbv at pin 1 40 0 200 mv a 18.2 output voltage am modulation depth = 60%, f mod = 20 khz, 60 dbv at pin 1 40 1.5 1.9 2.4 v a electrical characteristics (continued) test conditions (unless otherwise specified): v s = 8.5 v, t amb = 25c no. parameters test conditions pin symbol min. typ. max. unit type* *) type means: a =100% tested, b = 100% correlation tested, c = characterized on samples, d = design parameter
28 atr4258 4838a?audr?10/04 19 adjacent channel sensor, fm mode (bit 92 = 1, bit 93 = 0), bit 4 = 0 (default bw setting) 19.1 offset voltage unmodulated signal 10 200 mv c 19.2 19.3 output voltage am mod. 10% f mod = 100 khz am mod. 60% f mod = 100 khz 10 1.2 0.3 1.9 0.6 2.5 va 20 3-wire bus 20.1 input voltage low 17, 18, 19 0.8 v d 20.2 input voltage high 17, 18, 19 2.7 v d 20.3 leakage current v = 0 v, 5 v 17, 18, 19 10 a d 20.4 clock frequency 18 1.0 mhz d 20.5 period of clk high low t h t l 250 250 ns ns d 20.6 rise time en, data, clk t r 400 ns d 20.7 fall time en, data, clk t f 100 ns d 20.8 set-up time t s 100 ns d 20.9 hold time en t hen 250 ns d 20.10 hold time data t hda 0nsd 21 internally generated reference voltages 21.1 output voltage 12 5.5 5.7 6.0 v a 21.2 output voltage 29 3.0 v d 21.3 output voltage 27 3.0 v d 21.4 output voltage 39 3.0 v d electrical characteristics (continued) test conditions (unless otherwise specified): v s = 8.5 v, t amb = 25c no. parameters test conditions pin symbol min. typ. max. unit type* *) type means: a =100% tested, b = 100% correlation tested, c = characterized on samples, d = design parameter
29 atr4258 4838a?audr?10/04 application information am prescaler (divider) settings the am mixer is used for up conversion of the am reception frequency to the if fre- quency. therefore an am prescaler is implemented to generate the necessary lo from the vco frequency. for the reception of the am band different prescaler (divider) set- tings are possible. table 37 gives an example for the am prescaler (divider) settings and the reception frequencies. e.g., f vco = 98.2 mhz ... 124 mhz f if = 10.7 mhz note: prescaler vco divider = 1 in this example. table 37. am prescaler (divider) settings and reception frequencies divider (am prescaler) minimum reception frequency [mhz] maximum reception frequency [mhz] divide by 2 38.4 51.3 divide by 3 20.033 30.633 divide by 4 13.85 20.3 divide by 5 8.94 14.1 divide by 6 5.667 9.967 divide by 7 3.329 7.014 divide by 8 1.575 4.8 divide by 9 0.211 3.078 divide by 10 0 1.7 f rec f vco am prescaler ----------------------------------- - ?? ?? f if ? =
30 atr4258 4838a?audr?10/04 local oscillator and am prescaler settings table 38 gives an example for the vco prescaler divider and am prescaler divider set- tings and the reception frequencies. e.g., f vco = 195.9 mhz ... 237.9 mhz f if = +10.7 mhz or -10.7 mhz f vco = (f rec + f if ) vco prescaler am prescaler u4256 n- and r-divider calculation am mode fm/wb mode all modes f ref = reference oscillator frequency (e.g. 10.25 mhz) f vco = vco frequency f rec = reception frequency f step = step frequency (of the pll) table 38. vco and am prescaler (divider) settings and reception frequencies band prescaler vco if [mhz] minimum reception frequency [mhz] maximum reception frequency [mhz] minimum vco frequency maximum vco frequency am prescaler fm 2 +10.7 87.5 108 196.4 237.4 - wb 1.5 -10.7 162.4 162.55 227.55 227.775 - jpn 3 -10.7 76 90 195.9 237.9 - lw/mw 2 +10.7 0.15 1.605 195.3 221.49 9 16m 1 +10.7 17.5 17.9 225.6 228.8 8 120m 2 +10.7 2.3 2.5 208 211.2 8 n f vco vco-divider am prescaler f step --------------------------------------------------------------------------------------------- - = f rec f vco vco-divider am prescaler --------------------------------------------------------------------------- - ?? ?? f if ? = n f vco vco-divider f step -------------------------------------------------- = f rec f vco vco-divider -------------------------------- ?? ?? f if ? = r f ref f step ---------- =
31 atr4258 4838a?audr?10/04 diagrams the following data was measured with the application board (see figure 20). in the measurement setup, a 50 ? generator is terminated by 50 ? and connected to the antenna input by a 50 ? series resistor to achieve 75 ? termination at the antenna input. the generator level specified is the output voltage of this 50 ? generator at 50 ? load. if the application board is replaced by a 75 ? resistor, the voltage at this resistor is 6 db below the specified voltage level of the 50 ? generator. figure 12. fm demodulator note: integrated band-filter bw setting: 120 khz (bits 0 to 2 = 0, bit 3 = 1); 1 khz modulation frequency; 50 s de-emphasis (thd) figure 13. multipath sensor note: am modulation frequency 20 khz; generator level 40 dbv 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 10203040 5060 7080 90100 frequency deviation [khz] 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 mpx thd +85c -40c +85c -40c mpx output voltage [vrms] thd [%] 0 1 2 3 4 5 0 102030 40 5060 7080 90100 am modulation depth [%] +85c -40c sensor output voltage
32 atr4258 4838a?audr?10/04 figure 14. multipath sensor frequency response note: generator level 40 dbv figure 15. deviation sensor note: fm modulation frequency: 1 khz; bw setting 2 nd if filter = 120 khz; demodulator fine tuning (bit 53 = 0) the center frequency of the integrated band filter has to adjusted (e.g., if center frequency = 462.50 khz). 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 100 1000 10000 100000 am modulation frequency [hz] 90% at -40c 90% at 25c 60% at 85c 60% at -40c 60% at 25c sensor output voltage [v] 0 1 2 3 4 5 10000 30000 50000 70000 90000 frequency deviation [hz] +85c -40c deviation sensor output voltage [v]
33 atr4258 4838a?audr?10/04 figure 16. deviation sensor frequency response note: fm frequency deviation: 22.5 khz figure 17. fm input level sweep note: soft mute threshold bits 68, 69 = 0, bit 70 = 1; soft mute gain bit 67 = 0 gain fm if amplifier bit 89 to 91 = 1 0.0 0.2 0.4 0.6 0.8 1.0 100 1000 10000 100000 fm modulation frequency (hz) sensor output voltage (v) -70 -60 -50 -40 -30 -20 -10 0 10 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 input level [dbv] mpx output [db] 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 fieldstrength sensor output voltage [v]
34 atr4258 4838a?audr?10/04 figure 18. selectivity note: integrated bandfilter bw setting: 120 khz desired signal level adjusted to 40 db s/n without undesired signal undesired signal level adjusted to 26 db s/n -70 -60 -50 -40 -30 -20 -10 0 10 20 -300 -250 -200 -150 -100 -50 0 50 100 150 200 250 300 frequency offset [khz] pdes/pundes [db] 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 adjacent channel output voltage [v] pdes/pundes adjacent
35 atr4258 4838a?audr?10/04 figure 19. test circuit 10n 50 50 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 24 23 26 25 28 27 30 29 32 31 34 33 36 35 38 37 40 39 42 41 44 43 10n 10n 10n 1 bus 10n 10k atr4258 vs vs vs 47n 10n 100n 10n 100n 47n 100n p29 200k p29 10n p31 22n 330 10n 1k3 10n v p29 quarz- oscillator 10.25 mhz test point 10n 10n 100n 50 50 47n 50 50 50 50 50 50 100n 10n 50 50 47n 50 50 47n
36 atr4258 4838a?audr?10/04 figure 20. application circuit 12 13 atr4258 14 15 16 17 18 19 20 21 22 33 32 31 30 29 28 27 26 25 24 23 44 43 42 41 40 39 38 37 36 35 34 1 2 3 4 5 6 7 8 9 10 11 18p c203 22 c131 c132 f131 bb804 1 2 3 4 5 6 7 8 9 10 u4256bm 20 19 18 17 16 15 14 13 12 11 r41 1k2 c11 10n f102 c112 10 c113 100n swo1 dac3 swo2 swo3 swo4 int if2out data clk en gnd mpx adjac meter c310 f302 multip dev c208 c205 c202 f201 q151 r407 10 r32 1k r106 10 r152 10 c312 10n 1n c309 r303 1k 220n c207 r305 1k5 r33 2k x301 r304 5k6 r34 27 kr201 r313 390 c111 1 c in f201 100p c307 10n c209 r29 10 c308 100n vs (+8.5 v to 10.5 v) r311 2k2 r105 100 r115 1k t102 bc858 c109 c108 r102 68k c110 4n7 r121 68k r122 68k c56 10p c104 10n r112 47k l102 r104 470 c117 c107 22 c106 27p f101 bb804 d101 c103 c102 10n c311 100n r103 1k 3p9 d103 s391d 10n d302 l301 47 l303 2m2 l302 100h c306 c319 12p 6p8 bc 858c c316 r308 2k2 220n r307 47 c315 220n c302 10n r306 470k r151 8k2 c152 330p c134 1n c151 10n c158 10n c159 c157 10n 10n c154 c153 c155 c156 10n 10.25 mhz 10p 10p 100n c114 220n c133 6p8 c77 470p 47p 22p r131 5k6 kf302 kr202 220n 220n c204 c206 r111 200k 1 10n 10 470n c116 c115 100n 100n 10n t301 t302 bc848 t111 j109 t101 bfr93a ant fm 75 ? s391d d301 s391d c201 100n d131 d102 bb804 1n 6p8 application board schematic c27 22
37 atr4258 4838a?audr?10/04 package information ordering information extended type number package remarks atr4258-ilsh sso44 tube, lead-free ATR4258-ILQH sso44 taped and reeled, lead-free technical drawings according to din specifications package sso44 dimensions in mm 0.25 0.10 0.3 0.8 18.05 17.80 16.8 2.35 9.15 8.65 7.50 7.30 10.50 10.20 0.25 44 23 1 22
printed on recycled paper. 4838a?audr?10/04 disclaimer: the information in this document is provided in connection with atmel products. no license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of atmel products. except as set forth in atmel?s terms and condi- tions of sale located on atmel?s web site, atmel assumes no li ability whatsoever and disclaims any express, implied or statutor y warranty relating to its products including, but not limited to, the implied warranty of merchantability, fitness for a particu lar purpose, or non-infringement. in no event shall atmel be liable for any direct, indirect, conseque ntial, punitive, special or i nciden- tal damages (including, without limitation, damages for loss of profits, business interruption, or loss of information) arising out of the use or inability to use this document, even if atmel has been advised of the possibility of such damages. atmel makes no representations or warranties with respect to the accuracy or comp leteness of the contents of this document and reserves the ri ght to make changes to specifications and product descriptions at any time without notice. atmel does not make any commitment to update the information contained her ein. atmel?s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. 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 ? atmel corporation 2004 . all rights reserved. atmel ? , logo and combinations thereof are regi stered trademarks, and everywhere you are sm are the trademarks of atmel corporation or its subsidiaries . other terms and product names may be trademarks of others.

▲Up To Search▲

Price & Availability of ATR4258-ILQH

	To Download ATR4258-ILQH Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .