preliminary data sheet AS3802 rev. c 1 / 9 nov. 98 cdma/fm receive agc amplifier AS3802 key features r supports dual mode operation. r -50 to +50db gain control guaranteed. r single 3.6v supply. r temperature and supply stabilized. r power down feature. r 80mhz to 250mhz operation. r silicon bicmos process. r miniature surface mount 16 pin, 150 mil ssop package. compatibility the AS3802 is designed to be functionally or/and pin compatible to the following products: r rf9907 (rf micro devices), pin compat. r q5500 (qualcomm), pin compat. r cxa3001n (sony) general description the AS3802 is a gain controlled amplifier designed for the receive section of dual mode cdma/fdm, tdma/fdm or fm/fdm cellular phones. key specifications like gain range noise figure, ip3, temperature range and other specifications are designed to be in line with the is-95 standard for cdma cellular communications. the circuit is designed for narrow band if applications but can also be used in wideband applications. applications r digital cellular systems with receiving methods: cdma/fdm, tdma/fdm, fm/fdm and tdma/tdd. r examples: is-95 cdma, is-54 damps, amps, pwt. r cordless phones analog/digital. r general purpose linear if amp?s. r wll / wlan ssop-16 cdma+ cdma- gnd fm+ fm- gnd sel pwd out- out+ gnd gnd vcc vcc vcc vctrl 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 AS3802 austria mikro systeme international ag
preliminary data sheet AS3802 rev. a 2 / 9 jul 98 this document contains information on products under development. austria mikro systeme intl. ag reserves the right to change or discontinue this product without notice . absolut maximum ratings (non operating) symbol parameter min max unit note vdd positive supply voltage -0.5 7 v gnd analog ground 0 0 v vin voltage at every input pin) gnd-0.5 vdd+0.5 v iin input current (into any pin except supply pins and except low leakage pin) -40 40 ma iin_15 input current into low leakage pin -25 25 ma h humidity noncondensing 1) esd electrostatic discharge 1000 v 2) tstg storage temperature -55 125 deg c tlead lead temperature 260 deg c 3) notes: 1) defined din 40040 cond. f. 2) hbm: r=1.5kohm, c=100pf. open collector outputs have less esd protection because the protection diode to the positive supply cannot be implemented (the output swing is higher than vpos.+0.7v). 3) 260 deg c for 10 sec (reflow and wave soldering), 360 deg c for 3 sec (manual soldering). the above figures conform to cmos standard for low leakage application. recommended operating conditions symbol parameter min typ max unit note vdd positive supply voltage 3.6 v 1) gnd analog ground 0 0 0 v idd supply current 10 14 ma 2) tamb ambient temperature range, operating range -30 +80 deg c notes: 1) 3.6v 5%. 2) measured at pin vdd, see test schematic, no signal.
preliminary data sheet AS3802 rev. a 3 / 9 jul 98 rx agc electrical characteristics parameter min typ max unit note frequency range 80-250 mhz f -3db =250mhz maximum gain 50 db v g =3v minimum gain -50 db v g =0.2v noise figure 6.5 db max gain input ip3 -7 -14 dbm dbm min gain fm min gain cdma 1) output cp1 -25 dbm gain var. in +/-630 khz bandwidth centered at 85mhz +/-0.05 db gain slope linearity (over any 6db segment) +/- 3 db -32 to +72 deg.c gain control voltage range 0.2-3 v 0.2v min gain 3.0v max gain ref. to gnd gain control input impedance 16 k w current consumption 10 14 ma input resistance 1k diff. 850 sing. w w cdma fm output impedance 500 w 500 w differential outside (reff. =250 w ) cdma to fm isolation 30 db power down mode 2) notes: measurements refered to 85mhz. 1) two tone measurement is used. f 1 =86mhz; f 2 =87mhz; sel=high for cdma mode, sel=low for fm mode. 2) high o active, low o power save, input impedance 3 16k w .
preliminary data sheet AS3802 rev. a 4 / 9 jul 98 pin description pin# symbol function 1 cdma+ cdma positive differential input 2 cdma- cdma negative differential input 3 gnd analog ground 4 fm+ single ended analog input 5 fm- analog ground connection (rx fm input reference) 6 gnd analog ground 7 sel select, cmos input v select >=3.4v, cdma mode select v select <=0.5v, fm mode select 8 pwd power down, cmos input v pwd-rx >=3.4v, rx-agc active v pwd-rx <=0.5v, rx-agc off 9 out- analog differential output 10 out+ analog differential output 11 gnd analog ground 12 gnd analog ground 13 vcc vcc power supply 14 vcc vcc power supply 15 vcc vcc power supply 16 vctrl analog control input vctrl=0.2v, low gain rail; vctrl=3v, high gain rail
preliminary data sheet AS3802 rev. a 5 / 9 jul 98 definition of cdma source impedance, z s , and AS3802 input impedance z in if signal source cdma+ zs=500 w zin=1k w ( typ) vp vn cdma- r=1k w the value of the 1k w resistor is calculated in the matching network between the filter and the input of the rx-apm. definition of fm source impedance, z s , and AS3802 input impedance z in if signal source fm+ zs=850 w zin=850 w ( typ) vp vn fm- (ac gnd) ac gnd is defined as fm- in the package pin definition. definition of load impedance, z l , and AS3802 output impedance z o rx-cdma z l measurement reference plane out+ output port out- vcc z1 r b z1 z 0 zl eff rx-cdma output port impedance z o >5k w load impedance z l =500 w bias resistor r b =500 w * bias inductors l=choke, w .l>>r b * effective load z leff =250 w *note: z 1 can be a resistor or a choke. if it is a resistor z 1 =r 1 =250 w then r b is not used. if it is a choke, w .l>>r b and r b =500 w .
preliminary data sheet AS3802 rev. a 6 / 9 jul 98 transfer characteristic fm rx agc -80,00 -60,00 -40,00 -20,00 0,00 20,00 40,00 60,00 80,00 - 0,50 1,00 1,50 2,00 2,50 3,00 3,50 vcntrl [v] gain [db] gain, 25 degc gain, 75 degc gain, -35 degc cdma rx agc -80,00 -60,00 -40,00 -20,00 0,00 20,00 40,00 60,00 80,00 - 0,50 1,00 1,50 2,00 2,50 3,00 3,50 vcntrl [v] gain [db] gain, 25 degc gain, 75 degc gain, -35 degc
preliminary data sheet AS3802 rev. a 7 / 9 jul 98 intermodulation performance rx cdma iip3 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -60 -50 -40 -30 -20 -10 0 10 20 30 40 gain [db] iip [dbm] -120 -110 -100 -90 -80 -70 -60 -50 -40 pim [dbm] iip3 pim pin=const. = -26 dbm pout=const. = -41 dbm rx fm iip3 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 -60 -50 -40 -30 -20 -10 0 10 20 30 40 gain [db] iip3[dbm] -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 pim [dbm] iip3 pim pin=const. = -26 dbm pout=const. = -41 dbm
preliminary data sheet AS3802 rev. a 8 / 9 jul 98 compression behaviour output cp1 35 36 37 38 39 40 41 42 43 44 -90 -80 -70 -60 -50 -40 -30 pin [dbm] gain [db] -40 -35 -30 -25 -20 -15 -10 -5 0 pout [dbm] pout, rx cdma gain, rx cdma gain, rx fm pout, rx fm -1 db
preliminary data sheet AS3802 rev. a 9 / 9 jul 98 typical application @ 85mhz the information furnished herein by austria mikro systeme international is substantially correct and accurate. however, austria mikro systeme international shall not be liable to licensee or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data. no obligation or liability to licensee or any third party shall arise or flow out of austria mikro systeme international?s rendering of technical or other services. austria mikro systeme international makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austria mikro systeme international reserves the right to change specifications and prices at any time and without notice. therefore, prior to designing this product into a system, it is necessary to check with austria mikro systeme international for current information. this product is intended for use in normal commercial applications. applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life- support or life-sustaining equipment are specifically not recommended without additional processing by austria mikro systeme international for each application. copyright @ 1998, austria mikro systeme international ag, schlo? premst?tten, 8141 unterpremst?tten, austria. all rights reserved. the material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.
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