1 of 10 optimum technology matching? applied gaas hbt ingap hbt gaas mesfet sige bicmos si bicmos sige hbt gaas phemt si cmos si bjt gan hemt functional block diagram rf micro devices?, rfmd?, optimum technology matching?, enabling wireless connectivity?, powerstar?, polaris? total radio? and ultimateblue? are trademarks of rfmd, llc. bluetooth is a trade- mark owned by bluetooth sig, inc., u.s.a. and licensed for use by rfmd. all other trade names, trademarks and registered tradem arks are the property of their respective owners. ?2006, rf micro devices, inc. product description 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or sales-support@rfmd.com . ordering information rf mems ldmos 1 2 3 4 5 6 7 8 12 11 10 9 16 15 14 13 nc nc nc nc nc nc acg nc nc nc vdd nc nc nc rf out rf in RF3861 wide bandwidth, high linearity low noise amplifier the RF3861 is a low noise amplifier with a high output ip3. the amplifier is self-biased from a single voltage supply with 50 input and output ports. the useful frequency range is from 400mhz to 3800mhz. a 1db noise figure and 36dbm oip3 perfor mance is achieved with a 5v v dd , 90ma. current can be increased to ra ise oip3 while having minimal effect on noise figure. the ic is featured in a standard qfn, 16-pin, 3mmx3mm package. features ? low noise and high intercept point ? adjustable bias for enhanced ip3 ? single 2.5v to 6.0v power supply ? 400mhz to 3800mhz opera- tion ? qfn16, 3mmx3mm package applications ? gsm/edge, cdma,pcs,umts lna/linear driver ? wlan lna/linear driver ? wimax lna/linear driver ? 900mhz lna/linear driver ? general purpose amplifica- tion RF3861 wide bandwidth, high linearity low noise amplifier RF3861pck-410 fully assembled evaluation board with 5 sample parts 1.5ghz to 2.7ghz ds100113 9 package style: qfn, 16-pin, 3mmx3mm
2 of 10 RF3861 ds100113 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or sales-support@rfmd.com . absolute maximum ratings parameter rating unit supply voltage 6v v dc input rf level +10 dbm current drain, i dd 150 ma operating ambient temperature -40 to +85 c storage temperature -40 to +150 c note 1: max continuous rf in is +10dbm. the max transient rf in is +20dbm. parameter specification unit condition min. typ. max. high band frequency 3.3 3.5 3.8 ghz v dd =5v current 90 110 ma gain 10 db at 3.5ghz noise figure 1.1 db +25c, v dd =5v, i dd =90ma, 3500mhz unless specified oip3 37.0 dbm op1db 22.0 dbm s11 -12 db f 1 =3500mhz, f 2 =3501mhz s22 -18 db mid band frequency 1500 2700 mhz current 90 110 ma v dd =5v gain 13.5 14.5 16.5 db +25c, v dd =5v, i dd =90ma, 2000mhz unless specified noise figure 1.0 1.2 db oip3 33.0 35.5 dbm f 1 =2000mhz, f 2 =2001mhz op1db 21.0 22.5 25.0 dbm s11 -10 db s22 -20 db low band frequency 700 1100 mhz current 90 110 ma v dd =5v gain 16 db +25c, v dd =5v, i dd =90ma, 850mhz unless specified noise figure 1.2 db oip3 36.0 dbm f 1 =850mhz, f 2 =851mhz op1db 22.5 dbm s11 -14 db s22 -18 db thermal theta jc 51 c/w power supply device operating voltage 2.5 5.0 6.0 v operating current 65 90 110 ma v dd =5.0v, r2=open caution! esd sensitive device. exceeding any one or a combination of the absolute maximum rating conditions may cause permanent damage to the device. extended application of absolute maximum rating conditions to the device may reduce device reliability. specified typical perfor- mance or functional operation of the devi ce under absolute maximum rating condi- tions is not implied. rohs status based on eudirective2002/95/ec (at time of this document revision). the information in this publication is believed to be accurate and reliable. however, no responsibility is assumed by rf micro devices, inc. ("rfmd") for its use, nor for any infringement of patents, or other rights of third parties, resulting from its use. no license is granted by implication or otherwise under any patent or patent rights of rfmd. rfmd reserves the right to change component circuitry, recommended appli- cation circuitry and specifications at any time without prior notice.
3 of 10 RF3861 ds100113 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or sales-support@rfmd.com . package drawing pin function description interface schematic 1nc not connected. 2nc not connected. 3rf in rf input pin. 50 matched. this pin is dc-blocked. 4nc not connected. 5nc not connected. 6nc not connected. 7acg ac ground. shunt cap may be added for tuning. shunt resistor may be added to increase i dd /ip3. 8nc not connected. 9nc not connected. 10 nc not connected. 11 rf out rf output pin. 50 matched. this pin is dc-blocked. 12 nc not connected. 13 nc not connected. 14 nc not connected. 15 vd bias voltage. 2.5v to 6.0v applied through bias inductor. 16 nc not connected. pkg base gnd ground connection. dimensions in mm. shaded lead is pin 1. 0.1 c 0.102 ref 0.203 ref 0.925 0.775 c 0.08 c 0.15 c 2 plcs 0.15 c 2 plcs 3.00 a 3.00 b pin 1 id 0.10 c ab m 0.40 0.20 typ 1.70 1.70 0.28 0.18 typ 0.50 typ pin 1 id 0.05
4 of 10 RF3861 ds100113 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or sales-support@rfmd.com . application schematic 400mhz to 1300mhz 1 2 3 4 5 6 7 8 12 11 10 9 16 15 14 13 rf out rf in 39 nh open 10 pf note: this schematic is equiva lent to standard 700 mhz to 1100 mhz evaluation board. specification in above table shows tested performance over extended frequency range. see theory of operation section for details. 0 18 nh 100 pf 10 pf c2 10 nf vdd freq mhz 400 600 vcc volts 5 5 nf gain 800 1000 1300 5 5 5 db 1.7 1.4 1.2 1.1 1.1 db 15.23 15.81 16.49 16.7 15.28 oip3 dbm 35.45 37.33 36.56 36.22 36.88 op1db dbm 21.27 21.84 22.05 22.02 22.19
5 of 10 RF3861 ds100113 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or sales-support@rfmd.com . application schematic 800mhz to 2200mhz 1 2 3 4 5 6 7 8 12 11 10 9 16 15 14 13 rf out rf in 15 nh open open 0 15 nh 100 pf 10 pf c2 10 nf vdd freq mhz 800 2200 vcc volts 5 5 nf gain db 1.3 0.9 db 16 13.9 oip3 dbm 36 36 op1db dbm 22 22
6 of 10 RF3861 ds100113 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or sales-support@rfmd.com . evaluation board schematic 700mhz to 3800mhz 1 2 3 4 5 6 7 8 12 11 10 9 16 15 14 13 rf out rf in l1 r2 c4 r2 is dnp for standard 90 ma current draw. if r2 is added, the i dd will increase. a 20 r2 will raise the current to achieve higher linearity. r1 l2 c3 c1 c2 10 nf vdd components c1 (pf) c3 (pf) c4 (pf) 700-1100 mhz 10 100 10 1.5-2.7 ghz 3.3-3.8 ghz l1 (nh) l2 (nh) r1 (ohm) 39 18 0 10 100 dnp 3.9 4.7 0 r2 (ohm) dnp dnp dnp dnp 10 100 dnp 2.2 4.7 0 dnp dnp l3 (nh) l3
7 of 10 RF3861 ds100113 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or sales-support@rfmd.com . 5v noise figure versus temperature 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1500.0 2000.0 2500.0 3000.0 frequency (mhz) noise figure (db) -40 25 85 5v gain versus temperature 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 1500.0 2000.0 2500.0 3000.0 frequency (mhz) gain (db) -40 25 85 5v oip3 versus temperature 34.0 34.5 35.0 35.5 36.0 36.5 37.0 1500.0 2000.0 2500.0 3000.0 frequency (mhz) oip3 (dbm) -40 25 85 5v p1db versus temperature 20.5 21.0 21.5 22.0 22.5 23.0 23.5 1500.0 2000.0 2500.0 3000.0 frequency (mhz) p1db (dbm) -40 25 85 5v noise figure versus temperature 0.4 0.6 0.8 1.0 1.2 1.4 1.6 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 frequency (ghz) noise figure (db) -40 25 85 5v gain versus temperature 8.0 8.5 9.0 9.5 10.0 10.5 11.0 11.5 12.0 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 frequency (ghz) gain (db) -40 25 85
8 of 10 RF3861 ds100113 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or sales-support@rfmd.com . 5v oip3 versus temperature 36.0 36.5 37.0 37.5 38.0 38.5 39.0 39.5 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 frequency (ghz) oip3 (dbm) -40 25 85 5v p1db versus temperature 22.5 22.6 22.7 22.8 22.9 23.0 23.1 23.2 23.3 23.4 23.5 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 frequency (ghz) p1db (dbm) -40 25 85 410 evaluation board, oip3 versus r2 value v dd =5.0v optimum oip3 enhancement at r2=20 ohm 36.5 37.0 37.5 38.0 38.5 39.0 39.5 1750.0 1950.0 2150.0 2350.0 2550.0 2750.0 frequency (mhz) oip3 (db m r2 unpopulated r2 = 27 ohm r2 = 20 ohm r2 = 18 ohm r2 = 10 ohm RF3861 icc vs r2 vdd = 5.0 v r2 = 20 ohm for optimal oip3 80 85 90 95 100 105 110 115 120 125 130 r2 unpopulated r2 = 27 ohm r2 = 20 ohm r2 = 18 ohm r2 = 10 ohm r2 unpopulated r2 = 27 ohm r2 = 20 ohm r2 = 18 ohm r2 = 10 ohm
9 of 10 RF3861 ds100113 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or sales-support@rfmd.com . theory of operation low noise figure/high ip3 make RF3861 ideal for use as both receive lna and transmit driver for cellular/dcs/pcs/umts and wimax platforms, in addition to many other general purp ose applications. standard evaluation boards cover 700mhz to 1100mhz, 1500mhz to 2700mhz, and 3300mhz to 3800mhz. view ing the data sheet evaluation board schematic, refer to below for purpose/function of external components: ?r1/l3 (0 /unpopulated on standard evaluation boards): thes e unused components were placed for convenience and flexibility when needed to optimize matching for an out of band application. ? l2/c3/c4: placed to optimize input match, and enhance out of band low frequency stability. ? r2: optionally placed to increase bias current and ip3. it has been found that 20 value is best case (see graph section of data sheet). ? l1/c1: influence output return loss. RF3861 has internal dc blocking capacitors at rfin/rfout. in addition, it has been shown impe dance seen looking out at pins 7/15 influence response. as a result, two port s-parameters be come non-applicable. in the event matching is desired for fre- quency bands outside of those provided with standard evaluation boards, the following approach can be used: ? start with matching seen for standard evaluat ion board closest to desired band of operation. ? optimize values at l2/c4/l1 to obtain response/performance. the application schematic section of data sheet shows matchi ng arrived at using above procedure, for 400mhz to 1300mhz and 800mhz to 2200mhz. these schematics, along with stan dard evaluation boards, cover 82% of the useable bandwidth from 400mhz to 3800mhz. one interesting note concerning these application schema tics, the 400mhz to 1300mhz example shows same component values as seen with 700mhz to 1100mhz evaluation board. so, it is, in actuality, the same boar d. the specification chart next to the schematic simply extends the frequency band by 500mhz. input and output return losses are better than 10db over the entire 900mhz bandwidth.
10 of 10 RF3861 ds100113 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or sales-support@rfmd.com .
|
