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rev. 4536f?gps?10/03 features very low power design ( 50 mw) single if concept 2-bit adc on chip small qfn package (28 pins) highly integrated, few external components uhf6 technology electrostatic sensitive device. observe precautions for handling. description with the growing importance of mobile communication, location awareness is a key feature for more and more products and services. due to its small size and minimal power consumption, the gps front-end ic ATR0600 is an ideal solution for mobile applications and navigation systems. figure 1. block diagram rfin lna saw ant pfd xto lc-bp rfnin 96.76 mhz 1575.42 mhz dig. if at 4.35 mhz vco 1478.6 vs3 vdig power control ref nbpi vga amp bp-filter or 64 1 1 4 gc agco sc 23.104 mhz sigl sigh p1 vs1 vs2 vs5 23.104 mhz p2 mhz bpi bp nbp xto nxto vs7 x nx gps front-end ic ATR0600 preliminary 4 .com u datasheet
2 ATR0600 [preliminary] 4536f?gps?10/03 pin configuration figure 2. pinning qfn28 bp nbp bpi nbpi vs1 n.c. n.c. x vs5 xto nxto vs7 nx agco n . c . r f n i n r f i n v s 3 p 1 p 2 n . c . g c v s 2 r e f s i g l s i g h v d i g s c 14 13 12 11 10 9 8 22 23 24 25 26 27 28 15 16 17 18 19 20 21 7 6 5 4 3 2 1 pin description pin symbol type function protection level 1 agco o signal level output esd3 2 nx ob complementary to x esd3 3 vs7 p ecl - blocks supply esd2 4 nxto ib complementary to xto esd3 5 xto ib quartz input esd3 6 vs5 p xto supply esd2 7 x ob quartz intermediate output esd3 8 n.c. ? not connected ? 9 p2 i power-up quartz oscillator esd3 10 p1 i power-up rf part esd3 11 vs3 p reference supply esd2 12 rfin ib rf input 1.575 ghz esd3 13 rfnin ib complementary to rfin esd3 14 n.c. ? not connected ? 15 bp ib open-collector output of mixer esd3 16 nbp ib complementary to bp esd3 17 bpi ib if - filter input esd3 18 nbpi ib complementary to bpi esd3 19 vs1 p vco + mixer + vga supply esd2 20 n.c. ? not connected ? 21 n.c. ? not connected ? 22 gc i gain control input esd3 23 vs2 p subsampling unit supply esd2 24 ref o defining low threshold voltage esd3 25 sigl o digital interface subsampled output high threshold voltage refered to ref1 esd3 26 sigh o digital interface subsampled output low threshold voltage refered to ref2 esd3 27 vdig p digital interface supply voltage 1.8 v esd2 28 sc o digital interface clock output esd3 4 .com u datasheet
3 ATR0600 [preliminary] 4536f?gps?10/03 functional description the specification of gps receivers for personal mobile applications strongly differs from stand-alone gps receiver specifications. one reason is the presence of strong blocking signals from mobile transmitters which might cause unacceptable levels of degradation in the carrier-to-noise ratio of a gps system if not sufficiently suppressed. the other reason is the requirements for very low power consumption. the ATR0600 gps receiver ic has been especially designed for gps applications in mobile phones. from this system point of view, it incorporates highest isolation between gps and cellular antennas, as well as low power consumption. the ATR0600 contains a low-power single if design and integrates a complete frequency synthesizer. it is fully functional over a supply-voltage range of 2.7 v to 3.3 v and is housed in a 28-pin qln package. the gps receiver's input signal is a direct sequence spread spectrum (dsss) signal at 1575.42 mhz with a 1.023 mbps bi-phase-shift-keying (bpsk) modulated spreading code. as the input signal power at the antenna is approximately -140 dbm, the desired signal is below the thermal noise floor. lna/mixer stage the ATR0600 receives the l1 gps signal via an external lna. the lna bandwidth should be as narrow as possible to avoid interferences from out-of-band signals (espe- cially from those of the 1800 gsm band). combined with the antenna the lna provides a first filtering of the gps signal. the lna in addition should have a power shutdown feature. the shutdown signal will be gener- ated inside the digital section of the gps receiver. the output of the lna drives an external saw filter, which provides the image rejection for the mixer and the isolation of the 1800-mhz gsm band. the output of the saw filter drives a highly linear mixer which down-converts the gps signal to an if of 97.76 mhz. if stage the mixer directly drives an external lc-bandpath filter. in order to provide the ultimate selectivity of the gps frequency before the a/d conversion of the receiver part, the signal path of the ATR0600 combines an external filter and a second integrated filter. we recommend to design the external filter as a 2-pole filter with quality factor q > 25. vga amplifier stage the output of the lc-filter drives an on-chip variable gain-controlled amplifier (vga) which is combined with an integrated if-bandpath filter to perform additional filtering of gsm jamming signals. the agc stage provides the additional gain needed to optimally load the signal range of the following analog/digital converter. the agc control loop can be selected either on-chip close loop or open loop mode. connecting the agc_out output directly to the agc_cntrl input activates the internal control loop. in that case, the vga control signal is passed to the vga via an integrated buffer stage including all necessary filtering (low-pass f ilter). the external control loop is closed by the baseband ic atr0620. a/d converter stage the output of the vga drives the integrated 1.5-bit analog-to-digital converter stage, which comprises two comparators and two output drivers in order to provide sign and magnitude output bits to the baseband ic atr0620. the comparator low- and high- thresholds (in figure 1 on page 1 for sigh and sigl) are adjustable via external resis- tor. the or gate closes the internal agc control loop. power save setting stage the integrated power-control stage is controlled by the baseband ic atr0620 via p1 and p2. the input signals control the shutdown of the reference crystal oscillator (p2) or the shutdown of the whole rf section (p1). 4 .com u datasheet
4 ATR0600 [preliminary] 4536f?gps?10/03 . 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 . parameters symbol value unit supply voltage v s 3.7 v input voltage v in 3.7 v junction temperature t j 125 c storage temperature range t stg -40 to +125 c thermal resistance parameters symbol value unit junction ambient r thja 125 k/w recommended operating conditions parameters symbol value unit supply voltage v s 2.7 to 3.3 v temperature range temp -40 to +85 c input frequency f in, mixer 1575.42 mhz reference frequency f ref 23.104 mhz external if filter (see figure 13 on page 9) supply voltage digital interface, pin 27 v dd 1.65 to 2.0 v electrical characteristics no. parameters test conditions pin symbol min. typ. max. unit type* 1common 1.1 supply current p1 = p2 = vpu on 3, 6, 11, 19, 23 i s 18 ma a 1.2 supply current xto p1 = vpu off p2 = vpu on 6i xto 2maa 1.3 supply current digital interface p1 = p2 = vpu on 27 i dd 250 a a 1.4 supply current (power down) p1 = p2 = vpu off 3, 6, 11, 19, 23, 27 i s, pd 20 a a 1.5 total gain rfin, rnin matched, to 50 , v gc = 2.2 v 1 g 95 db b 1.6 noise figure n f 6.9 db c *) type means: a = 100% tested, b = 100% correlation tested, c = characterized on samples, d = design parameter 4 .com u datasheet
5 ATR0600 [preliminary] 4536f?gps?10/03 2 mixer and 1 st if-filter 2.1 output frequency f ref = 23.104 mhz 15, 16 f if 96.76 mhz b 2.2 input impedance f ref = 1575 mhz 12, 13 z in, if 13 - j80 c 3vga and 2 nd if-filter 3.1 bandpass center frequency f ref = 23.104 mhz f in, vga 96.76 mhz 3.2 minimum gain v gc = 1.0 v g vga, min 0dbd 3.3 maximum gain v gc = 2.2 v g vga, max 75 db d 3.4 control-voltage sensitivity v gc = 2.2 v v gc = 1.0 v n vga, min n vga, max 6.6 150 db/v db/v d d 3.5 gain-control output cut-off frequency without external load f agc_out 100 khz d 3.6 gain-control output voltage at 50 pf load 1 v agc_out 1.0 2.2 v b 4 reference oscillator 4.1 xto phase noise at 100 hz 28 p n100 -80 dbc/hz c 4.2 xto phase noise at 1 khz 28 p n1k -100 dbc/hz c 5 clock and data driver 5.1 clock driver frequency 28 f clk 23.104 mhz a 5.2 clock output level c load = 10 pf 28 v clkhigh 0.8 v dd vb, c 5.3 clock output level c load = 10 pf 28 v clklow 0.2 v dd vc 5.4 data output level c load = 10 pf 25, 26 v datahigh 0.8 v dd vc 5.5 data output level c load = 10 pf 25, 26 v datalow 0.2 v dd vc 6 power-up, pins p1 and p2 6.1 power-on voltage level on 9, 10 vpu on 0.9 v c 6.2 power-on voltage level off 9, 10 vpu off 0.3 v c 6.3 power-on delay time 9, 10 tpu on, off 6sc electrical characteristics (continued) 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 4 .com u datasheet
6 ATR0600 [preliminary] 4536f?gps?10/03 interface description figure 3. clock interface figure 4. sigh interface figure 5. sigl interface figure 6. supply vdigi interface figure 7. power control interface p1 i 20k vdig sc chip sc 10p maximum load capacitance i 20k vdig sigh chip sigh 10p maximum load cap. i 20k v dig sigl chip maximum load cap. sigl 10p vdig chip vdi g 1.8v supply vdd p1 application 100k 50k p1 20k chip 4 .com u datasheet
7 ATR0600 [preliminary] 4536f?gps?10/03 figure 8. power control interface p2 figure 9. automatic gain-control interface figure 10. a/d reference level-control interface ref vdd p2 application 100k 50k p2 20k chip v cc 32ua gc chip, connected to agco 44k i 150k 50p agco chip agco 100p vcc i ref chip ref application select value on test r optional 4 .com u datasheet
8 ATR0600 [preliminary] 4536f?gps?10/03 figure 11. mixer input interface figure 12. xto interface vcc 250ua 2.5k 2.5k 2ma rf nrf chip application (matching) nrf rfx nrfx rf 220 68p 100k nxto nx chip application 220 xto nxto x xto 47p 47p x nx 4 .com u datasheet
9 ATR0600 [preliminary] 4536f?gps?10/03 figure 13. if-filter interface figure 14. mixer input impedance at rf-nrf imax 2ma 2p bp imax 2ma 2p nbp 60ua vcc 2p bpi 60ua vcc 2p nbpi chip 220nh nbp nbpi bpi bp 220nh 220nh 220nh 5p application (if-filter) 5p 300ff 300ff 68 vcc 4 .com u datasheet
10 ATR0600 [preliminary] 4536f?gps?10/03 package information ordering information extended type number package remarks ATR0600-pjq qfn28 - 5x5 taped and reeled 4 .com u datasheet
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 4536f?gps?10/03 ? atmel corporation 2003 . all rights reserved. atmel ? and combinations thereof are the registered tradem arks of atmel corporation or its subsidiaries. other terms and product names may be the trademarks of others. 4 .com u datasheet

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