1 / 3 www.asb.co.kr september 2009 p lerow tm ALN1946 internally matched lna module the plerow tm aln - series is the compactly designed surface - mount module for the use of the lna with or without the following gain blocks in the infrastructure equipment of the mobile wireless (cdma, gsm, pcs , phs, wcdma, dmb, wlan, wibro, wimax), gps, satellite commun i- cation terminals , catv and so on. it has an exceptional performance of low noise figure, high gain, high oip3, and low bias current. the stability factor is always kept more than unity over the application band in order to ensure its unconditionally stable implementation to the application system environment. the surface - mount module package including the completed matching circuit and other components necessary just in case allows very simple an d convenient implementation onto the system board in mass production level. parameter unit specifications min typ max frequency range mhz 1901 1991 gain db 26 27 gain flatness db 0.3 0.4 noise figure db 0.65 0.7 output ip3 (1) dbm 35 36 s11/s22 (2) db - 20/ - 20 output p1db dbm 21 22 sw itching time (3) m sec - supply current ma 120 140 supply voltage v 5 impedance w 50 max. rf input power dbm c.w 29~31 (before fail) package type & size mm surface mount type, 13wx13lx3.8h operating temperature is C 40 c to +85 c. 1) oip3 is measured wi th two tones at an output power of 4 dbm/tone separated by 1 mhz. 2) s11, s22 (max) is the worst value within the frequency band. 3) switching time means the time that takes for output power to get stabilized to its final level after switching dc voltage f rom 0 v to v s . pin number function 3 rf in 8 rf out 10 v s other s ground ou t line drawing (unit: mm) feature s s 21 = 27.3 db@1901 mhz = 26.7 db@1991 mhz nf of 0.65 db over fr e quency unconditionally stable single 5 v supply high oip3@low current note: 1. the number and size of ground via hole s in a circuit board is critical for thermal rf grounding consider a tions. 2. we recommend that the ground via holes be placed on the bottom of all ground pins for better rf and thermal perfor m ance, as shown in the dra w ing at the left side. descr iption ALN1946 asb inc. (top view) (bottom view) solder stencil area ? 0.4 plated thru holes to ground plane plerow (side view) (recommended footprint) website: www.asb.co.kr e - mail: sales@asb.co.kr tel: (82) 42 - 528 - 722 3 f ax : (82) 42 - 528 - 7222 more inform a tion 2 - stage single type typ.@t = 25 c, v s = 5 v, freq. = 1946 mhz, z o.sys = 50 ohms specifications (in pr o duction)
2 / 3 www.asb.co.kr september 2009 p lerow tm ALN1946 internally matched lna module s - param e ters noise figure oip3 p1db 1901~1991 mhz +5 v typical performance (measured) s - parameters & k fa c tor
3 / 3 www.asb.co.kr september 2009 p lerow tm ALN1946 internally matched lna module 1) the tantal or mlc (multi layer ceramic) capacitor is optional and for bypassin g the ac noise introduced from the dc supply. the capacitance value may be determined by customer s dc supply status . the c a- pacitor should be placed as close as possible to v s pin and be connected directly to the ground plane for the best electrical perfor mance . 2) dc blocking capacitors are always necessarily placed at the input and output port for allowing only the rf signal to pass and blocking the dc component in the signal. the dc blocking capacitors are i n clu d- ed inside the aln module. therefore, c1 & c2 capacitors may not be necessary, but can be added just in case that the customer wants. the value of c1 & c2 is determined by considering the application fr e- quency. application circuit recommende d soldering reflow process + - aln out in c1 c2 v s tantal or mlc (multi layer c e ramic) c a pacitor 20~40 sec 260 c 200 c 150 c 60~180 sec ramp - up (6 c/sec) ramp - down (6 c/sec) in out vs size 25x25mm (for aln series C 13x13mm) evaluation board layout
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