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note: this is a summary document. the complete document is available under nda. for more information, please contact your local atmel sales office. features ? world tuner application due to integrated vco dividers rf input for weather band applications am reception 100 khz up to 30 mhz am up/down conversion depending on reception frequency vco slave mode for phase diversity applications fm image rejection mixer selectable high-side/low-side injection for fm mode selectable fm mixer output rf-agc threshold programmable for am and fm inband-agc threshold programmable cascode control voltage for am fet pre-stage integrated pin-diode drivers for am and fm three selectable if amplifier inputs fractional pll with fast lock time small frequency steps for am excellent snr for drm applications differential reference frequency input for pll down to 9 khz or integrated xco driver available two wire interface (twi) with two selectable bus addresses digital electronic alignment of up to two external filter stages flexible and economic if filter concept control inputs for if gain, reception frequency and keyed agc integrated state-machine for optional co ntrol of alternative frequency check only one power supply voltage necessary 1. description the ATR4262 is a single-chip am/fm and weather band tuner dedicated for digital if solutions in car-radio applicati ons. ATR4262 is produced using atmel ? ?s advanced bicmos2s technology and fulfills the automotive requirements. this part is suitable for iboc reception as well as for drm solutions. the high flexibility allows to design high performance and cost optimized tuner solutions. broadcast radio front-end ic for am/fm/drm/hd radio ATR4262 summary preliminary 4994as?audr?09/07
2 4994as?audr?09/07 ATR4262 [preliminary] 2. pin configuration figure 2-1. pinning qfn48 amin1 amin2 amcvc ampind sw1 fmpind fmin1 fmin12 fmin2 dac1 dac2 sw2 sw3 ifout1 ifout2 vspll ref1 ref2 vrpll amlf fmlf vtune gndpll vcobuf amout1 amout2 amagctc1 fmout1 fmout2 vst ifin1 ifref ifin2 vrt ifin3 amagct2 fmagctc kagc ifgcl ifgcm enable sda scl afcc vrvco vcob vcoe gndvco 48 47 46 45 44 43 42 41 40 39 38 37 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 8 9 10 11 12 36 35 34 33 32 31 30 29 28 27 26 25 ATR4262 table 2-1. pin description pin symbol function 1 amin1 am mixer input 2 amin2 am mixer input 3 amcvc am cascode voltage output 4 ampind am pin diode output 5 sw1 sw1 switching output 6 fmpind fm pin diode output 7 fmin1 fm mixer input 1 8 fmin12 fm mixer input 12 9 fmin2 fm mixer input 2 10 dac1 dac tuning voltage output 1 11 dac2 dac tuning voltage output 2 12 sw2 sw2 switching output/external tuning voltage input 13 fmagctc rf agc fm time constant 14 kagc keyed agc input/sw7/lock detect/afsample 15 ifgcl if gain control lsb/sw4 16 ifgcm if gain control msb/sw5 17 enable control bus enable/address select 18 sda two-wire control bus sda 19 scl two-wire control bus scl
3 4994as?audr?09/07 ATR4262 [preliminary] 20 afcc afc control input/sw6 switching output/lock detect/afhold 21 vrvco reference voltage vco 22 vcob vco resonator (base) 23 vcoe vco resonator (emitter) 24 gndvco vco ground 25 vcobuf vco buffer output/input 26 gndpll pll ground 27 vtune tuning voltage output 28 fmlf pll loopfilter fm 29 amlf pll loopfilter am 30 vrpll reference voltage digital 31 ref2 refclockinput2/crystal oscillator 32 ref1 refclockinput1/crystal oscillator 33 vspll supply voltage digital input 34 ifout2 if output 2 35 ifout1 if output 1 36 sw3 sw3 switching output/lock detect/afsample 37 amagctc2 rf agc am time constant 2 38 ifin3 if amplifier input 39 vrt reference voltage tuner 40 ifin2 if amplifier input 41 ifref if reference voltage 42 ifin1 if amplifier input 43 vst supply voltage tuner 44 fmout2 fm mixer output 45 fmout1 fm mixer output 46 amagctc1 rf agc am time constant 1 47 amout2 am mixer output/fm mixer output 4 48 amout1 am mixer output/fm mixer output 3 die pad gndt_pad tuner rf and if ground table 2-1. pin description pin symbol function
4 4994as?audr?09/07 ATR4262 [preliminary] 3. 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 t hose indicated in the operational sections of this specification is not implied. exposure to absolute maximum rati ng conditions for extended periods may affect device reliability . parameters pin group min. max. unit voltage digital ?0.5 +5.5 v supply ?0.5 +12 v voltage references ?0.5 +6.4 v switches 1, 3 ?0.5 +14 v ifgcl, ifgcm, afcc, kagc, sw2 ?0.5 v s + 0.5 v mixer outputs ?0.5 +16 v analog ?0.5 v s + 0.5 v current switches 0 2.7 ma ambient temperature t amb ?40 +100 c storage temperature t stg ?40 +100 c junction temperature t j +150 c power dissipation p tot 1.4 w esd hbm all pins ?2 +2 kv esd mm all pins ?200 +200 v 4. thermal resistance parameters test condition symbol value unit thermal resistance junction-ambient soldered to pcb r thja 30 k/w 5. operating range parameters symbol value unit supply voltage v s 8 to 10 v supply voltage for operation of control bus (data preservation in bus registers is guaranteed) v s 7 to 10 v ambient temperature t amb ?40 to +90 c
5 4994as?audr?09/07 ATR4262 [preliminary] 6. functional description the ATR4262 front end is designed for world-tuner applications. due to its flexible divider arrangement, the tuner can be used for reception from 100 khz to 163 mhz. the field of use covers all the common radio broadcast services from am-lw to am-sw (up to 30 mhz) and from fm-oirt to us weatherband. the tuner application can be easily adapted to the require- ments of drm and hd-radio (iboc). fm section the ATR4262 contains a high performance fm image rejection mixer, which helps to reduce the demands and the cost of the front end application. the fm mixer output can be switched to an alternative pair of pins to allow different if filter concepts for fm mode. two selectable inputs can be used for independent fm front end sections. am section the am section contains a dedicated am pr escaler for the lo signal. very small tuning steps are possible using this divider, while at the same time a high pll comparison fre- quency guarantees excellent phasenoise behavior. rf-agc both am and fm signal paths have thei r own rfagcs with a wideband and a narrowband detector with individual thresholds. the thresholds for am and fm can be programmed in 2 db steps. an optional keyed agc function reduces the wideband agc threshold up to 6 db in order to avoid desensitization of the tuner. pin diode drivers for am and fm are inte- grated to reduce cost for external components. in addition to the pin diode control, a cascode control voltage for the external lna is provided by the am-agc block. if stage the if amplifier has three selectable inputs, which can be matched to any common if filter impedance by external components. with thes e inputs, the tuner application can be easily adapted to different br oadcast standards, while conventi onal standards are still possible. gain can be set via pins or by setting bits , which makes the ATR4262 very versatile and easy to adapt to different baseband architectures. fractional pll the ATR4262 contains a complete fractional pll, which guarantees fast lock time, low phase noise and small tuning steps. a refer ence clock frequency from 9 khz up to 21 mhz provided by, for example, baseband can be us ed. alternatively the integrated xco with standard crystals from 10 mhz to 21 mhz ca n be used as the reference for the pll. double tuner concept like phase diversity or background tuning, double- tuner applications are also possible. for phase diversity applications, the tuner can also operate in slave mode with a master tuner providing the vco frequency for both tuners. digital electronic alignment two independent gain and offset programmable dacs are available to tune the fm front end section. the pll?s tuning voltage is used as input for the dacs to ensure proper track- ing to the reception frequency. in slave mode, the tuning voltage of a master tuner must be applied to a dedicated input pin.
6 4994as?audr?09/07 ATR4262 [preliminary] alternative frequency check an optional state machine can control the alternative frequency check sequence for some common basebands. this feature reduces the cpu load of the main controller because the statemachine outputs the signals with the correct timing for quality check and muting of the baseband. switching outputs up to seven general-purposes open-drain switches are available to simplify the customer application. two-wire control interface the ATR4262 can be programmed via a fast-mode twi bus interface. two different ic addresses can be selected to allow two tuners at the same bus segment. various program- ming bits allow unique flexib ility of operation modes. a tu ner status byte provides information about the receiving conditions and the pll status. package and power supply the ATR4262 comes in a small outline qfn48 package to allow small and cost-effective tuner applications. a single 8v to 10v supply voltage is sufficient to operate the ATR4262 and to reduce the complexity of the customer application.
7 4994as?audr?09/07 ATR4262 [preliminary] 7. vco and am prescaler settings table 7-1 gives an example of the vco divider and am prescaler settings and the reception frequencies. a small vco frequency range of e.g., 195.3 mhz to 237.9 mhz allows reception of the most important bands like fm, jpn, lw, mw, 49m, 41m, and 31m. 8. power supply there is only one power supply voltage (8v to 10v) necessary for operation of the ATR4262. table 7-1. typical vco divider, am prescaler settings, and reception frequencies band vco- divider (d fm ) n-div. prescaler (d pll ) if [mhz] min. reception frequency [mhz] max. reception frequency [mhz] min. vco frequency max. vco frequency am- prescaler (d am ) fm 2 2 +10.7 87.5 108 196.4 237.4 - jpn 3 3 ?10.7 76 90 195.9 237.9 - wb 1 2 +10.7 162.4 162.55 173.1 173.25 - oirt 3 3 +10.7 65.8 74 229.5 254.1 - oirt 3 3 ?10.7 65.8 74 165.3 189.9 - lw/mw - 2 +10.7 0.15 1.605 217 246.1 10 lw/mw - 2 +10.7 0.15 1.605 195.3 221.49 9 120m - 2 +10.7 2.3 2.5 208 211.2 8 ... 49m - 2 +10.7 5.95 6.2 199.8 202.8 6 41m - 2 +10.7 7.1 7.35 213.6 216.6 6 31m - 2 +10.7 9.5 9.9 202 206 5 ... 11m - 2 +10.7 21.45 21.85 192.9 195.3 3
8 4994as?audr?09/07 ATR4262 [preliminary] 9. if filter stage concept there are several different if filter concepts possible depending on the broadcast standard and the targeted quality range of the tuner. for that purpose a programmable switch for the fm mixer output as well as three programmable inputs for the if amplifier is available. figure 9-1. example of simple if filter stage concept table 9-1. if filter stage configuration configuration fmout amfmout number of mixer output tanks number of if filters am low cost not used or connected to amfmout mixer tank ceramic filter (bw 180 khz) 11 am ceramic filter (compatible to drm) mixer tank ceramic filter (bw 180 khz) mixer tank ceramic filter (20 khz) 22 am crystal filter not used or connected to amfmout mixer tank ceramic filter (bw 180 khz) crystal filter (bw 7 khz) 12 am crystal filter, separate tank mixer tank ceramic filter (bw 180 khz) mixer tank crystal filter (bw 7 khz) 22 iboc mixer tank ceramic filter (bw 400 khz) mixer tank ceramic filter (bw 180 khz) 22 iboc low cost not used or connected to amfmout mixer tank ceramic filter (bw 400 khz) 11 iboc with am filter mixer tank ceramic filter (bw 400 khz) mixer tank ceramic filter (bw 180 khz) ceramic filter (bw 30 khz) 23 ifref ifinam ifinfm mxfmout kf1 kf2 f2 c cf2in cif2in cif1in rkf1out 1k8 rkf2out 330 +vs rin(if2) rin(if1) rs2 180 rs1 1k8 rf12 x rf1out y x + y = 300 ?
9 4994as?audr?09/07 ATR4262 [preliminary] 10. double tuner application figure 10-1. double tuner operation 10.1 i 2 c-bus address modes to allow programming of both ics (e.g., double tuner), scl and sda can be connected to both ics. there are two different modes for enable. for example, the enable pin of the master ic is not connected (open mode). only a capacitor to ground is required to avoid oscillations of the enable pin. to program the master ic for open mode, the address byte c2h must be used. the enable pin of the other ic (slave) has to be set to high. the applied voltage for high mode should be in the range of 2.5v to 5.3v. addre ss byte c0h is used as the slave in this case. another possibility is the us e of separate enable lines which can be controlled by a microcontroller. vcobuf ATR4262 vtune or dac 25 27 or 18 ATR4262 100 pf vcobuf sw2 sda 12 25 ref2 ref1 ref2 ref1 ref clk1 10 nf* ref clk2 master slave scl 10 nf enable enable enable1 sda enable2 scl 5v (high) 270 pf* 1 h* ifout1 ifout2 ifout1 ifout2 ifout1 ifout2 34 35 32 31 31 18 19 17 sda scl 19 32 17 10,11 10 nf* 270 pf* 1 h* ifout1 ifout2 34 35 *) optional
10 4994as?audr?09/07 ATR4262 [preliminary] 12. package information 11. ordering information extended type number package remarks ATR4262m1-plqw qfn48 - 7 7 taped and reeled ATR4262m3-plqw qfn48 - 7 7 taped and reeled 0.4 0.1 48 48 37 13 24 12 25 36 7 5.5 4.5 0.5 nom. 12 1 1 specifications according to din technical drawings issue: 2; 24.01.03 drawing-no.: 6.543-5089.01-4 package: qfn 48 - 7 x 7 exposed pad 4.5 x 4.5 (acc. jedec outline no. mo-220) dimensions in mm not indicated tolerances 0.05 0.23 0.05 -0.05 1 max. +0
4994as?audr?09/07 headquarters international atmel corporation 2325 orchard parkway san jose, ca 95131 usa tel: 1(408) 441-0311 fax: 1(408) 487-2600 atmel asia room 1219 chinachem golden plaza 77 mody road tsimshatsui east kowloon hong kong tel: (852) 2721-9778 fax: (852) 2722-1369 atmel europe le krebs 8, rue jean-pierre timbaud bp 309 78054 saint-quentin-en-yvelines cedex france tel: (33) 1-30-60-70-00 fax: (33) 1-30-60-71-11 atmel 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 product contact web site www.atmel.com technical support broadcast@atmel.com sales contact www.atmel.com/contacts literature requests www.atmel.com/literature 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, consequential, 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 atme l 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 rig ht 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. unless specifically provided otherwise, atmel products are not suitable for, and shall not be used in, automotive applications. atmel?s products are not int ended, authorized, or warranted for use as components in applications in tended to support or sustain life. ? 2007 atmel corporation. all rights reserved. atmel ? , logo and combinations thereof, and others are registered trademarks or trademarks of atmel corporation or its subsidiaries. other terms and product names may be trademarks of others.

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