wireless communications division for additional information and latest specifications, see our website: www.triquint.com 1 TQ9223C data sheet 3v cellular tdma/amps lna/mixer receiver ic features +3-v single supply on-chip lo buffer mixer lo and rf matched to 50 w low-cost so-14 plastic package gain select (high/low) applications digital mobile phones amps mobile phones ism 900mhz cordless telephones cdpd terminals product description the TQ9223C 3v rfic downconverter is a rf receiver ic front end designed for the high dynamic range cellular communications standards. the TQ9223C provides a 2.8db system noise figure for excellent sensitivity, and a good signal range with -11db input ip3. its low current consumption, single +3v operation and small plastic surface-mount package are ideally suited for cost-competitive, space-limited and portable applications. the TQ9223C will operate over a rf frequency range of 800 to 1000mhz, and therefore may be used for any of the cellular and cordless telephony standards. electrical specifications 1 parameter min typ max units frequency 800 1000 mhz gain 19.0 db noise figure 2.6 db input 3 rd order intercept -11.0 dbm dc supply current 15.0 ma note 1: test conditions : vdd=3.75v, ta=25c, filter il=3.0db, rf=881mhz, lo=966mhz, if=85mhz, lo input=-6dbm mixer lo in gain select rf in mixer if out mixer rf in lna out vdd cntrl vdd gnd lo tune
TQ9223C data sheet 2 for additional information and latest specifications, see our website: www.triquint.com electrical characteristics parameter conditions min. typ/nom max. units rf frequency tuned external match 800 1000 mhz lo frequency tuned external match 500 1300 mhz if frequency tuned external match 45 300 mhz lo input level -7 -4 0 dbm supply voltage 3.0 3.75 5.5 v gain 17.0 19.0 db noise figure 2.6 3.5 db input 3 rd order intercept -11.0 dbm return loss mixer rf input mixer lo input 10 10 db db isolation lo torf input mixer lo to if after external match 45 40 db db supply current 15 ma note 1: test conditions :, vdd=3.75v, ta=25c, filter il=3.0db, rf=881mhz, lo=966mhz, if=85mhz, lo input=-6dbm: unless otherwise specified. electrical characteristics-lna section only parameter conditions min. typ/nom max. units gain 18.5 db noise figure 1.8 db input 3 rd order intercept -6.0 dbm reverse isolation 28.0 db supply current 5.0 ma note 1: test conditions:, vdd=3.75v, ta=25c, rf=881mhz, external input and output match; unless otherwise s pecified.
TQ9223C data sheet for additional information and latest specifications, see our website: www.triquint.com 3 electrical characteristics- mixer section only parameter conditions min. typ/nom max. units conversion gain 3.5 db noise figure 12.0 db output 3 rd order intercept 10.0 dbm mixer rf return loss 15.0 db mixer lo return loss 10.0 db lo input power -6.0 dbm lo to if isolation 40.0 db lo to rf isolation 5.0 db rf to if isolation 40.0 db supply current 4.0 ma note 1: test conditions :, vdd=3.75v, ta=25c, rf=881mhz, lo=966mhz, if=85mhz, lo input=-6dbm: unless otherwise specified. absolute maximum ratings parameter value units dc power supply 8.0 v rf input power +10 dbm operating temperature -40 to 85 c storage temperature -55 to 150 c
TQ9223C data sheet 4 for additional information and latest specifications, see our website: www.triquint.com typical performance test conditions (unless ot herwise specified: vdd=3.75v, ta=25c, filter il=3.0db, rf=881mhz, lo=966mhz, if=85mhz, lo input=-6dbm conversion gain v freq v temp 14 15 16 17 18 19 20 21 22 23 24 869 881 894 freq (mhz) conversion gain (db) -30c +30c +85c conversion gain v vdd v temp 14 15 16 17 18 19 20 21 22 23 24 2.8 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5 vdd (volts) conversion gain (db) -30c +30c +85c tq9223 conversion gain v temp v vdd 15 16 17 18 19 20 21 22 23 24 -30 -10 10 30 50 70 90 temp (c) conversion gain (db) 3.0v 3.75v 5.0v noise figure v freq v temp 2 2.5 3 3.5 4 4.5 5 869 881 894 freq (mhz) noise figure (db) -30c +30c +85c noise figure v vdd v temp 2 2.5 3 3.5 4 4.5 2.5 3 3.5 4 4.5 5 vdd (volts) noise figure (db) -30c +30c +85c noise figure v temp v vdd 2 2.5 3 3.5 4 4.5 -30 0 30 60 90 temp (c) noise figure (db) 3.0v 3.75v 5.0v
TQ9223C data sheet for additional information and latest specifications, see our website: www.triquint.com 5 iip3 v freq v temp -16 -14 -12 -10 -8 -6 -4 869 881 894 freq (mhz) iip3 (dbm) -30c +30c +85c iip3 v vdd v temp -16 -15 -14 -13 -12 -11 -10 -9 -8 -7 -6 2.5 3 3.5 4 4.5 5 vdd (volts) iip3 (dbm) -30c +30c +85c iip3 v temp v vdd -16 -15 -14 -13 -12 -11 -10 -9 -8 -7 -6 -30 0 30 60 90 temp (c) iip3 (dbm) 3.0v 3.75v 5.0v idd v vdd v temp 0.005 0.006 0.007 0.008 0.009 2.5 3 3.5 4 4.5 5 vdd (volts) idd (a) -30c +30c +85c
TQ9223C data sheet 6 for additional information and latest specifications, see our website: www.triquint.com lna s-parameters, vdd=3.75v freq |s11| TQ9223C data sheet for additional information and latest specifications, see our website: www.triquint.com 7 mixer s-parameters, 3.75v freq (ghz) rf in |s11| rf in TQ9223C data sheet 8 for additional information and latest specifications, see our website: www.triquint.com application/test circuit bill of material for tq5121 receiver application/test circuit component reference designator part number value size manufacturer receiver ic u1 TQ9223C so-14 triquint semiconductor capacitor c1, c2, c3, c4, c5, c6 0.01uf 0402 capacitor c7 1.2pfpf 0402 capacitor c8 6.0pf 0402 capacitor c9 15pf 0402 capacitor c10 2.7pf 0402 inductor l1 6.8nh 0402 inductor l2 8.2nh 0402 inductor l3 33nh 0402 inductor l4 12nh 0402 inductor l5 470nh 0402 resitor r1, r2, r3,r4, r5 10 ohm 0603 vdd 1 2 3 4 5 6 7 14 13 12 11 10 9 8 rf in gain select mixer lo in lna out mixer if out mixer rf in vdd r3 r2 c3 c2 r1 c10 l1 c6 c5 r5 l2 c7 l3 l4 c9 c8 l5 r4 c4 vdd c1
TQ9223C data sheet for additional information and latest specifications, see our website: www.triquint.com 9 TQ9223C product description the TQ9223C efficiently integrates a low-noise amplifier and high-intercept mixer, with performance equal to a discrete implementation, through use of circuit techniques from monolithic and discrete design practices. the lna consists of a common-source amplifier cascoded to a common-gate amplifier using a dc-stacked topology. the same dc current flows through both stages. an external noise match is used to achieve optimum noise figure. lna input and output matching is performed with pc boards microstrip lines or lumped-element surface-mount components, using simple, well understood networks. the mixer is implemented as a ?cascode? stage operating like a dual-gate fet mixer. a common-gate lo buffer provides the necessary gain to drive the mixer fet gate and establishes a good input match. the on-chip buffer amplifier allows for direct connection to a commercial vco at drive levels down to ?6dbm. an ?open collector? if output allows for flexibility, matching to various ifs and filter types. the two topologies efficiently use the supply current for low- power operation, approximately 10ma with a 3v supply. the overall circuit provides a distinct performance edge over silicon monolithic designs in terms of input intercept, noise figure and gain. specifically, the circuit was intended for use in the following applications : cellular (amps, gsm, jdc, etacs, etc.) and ism band (902 ? 928 mhz) operation please refer to the test circuit above. gain select (pin 5) in a strong signal environment, the lna can be shut down by applying 0v to pin 5. the result is that the lna gain decreases from a nominal of +18db to ?19db. the current in the lna decreases to 1ma. in addition, the input ip3 for the lna increases from ?6dbm to +5dbm, and for the downconverter from ?11dbm to ?7.5dbm. power supply connection the TQ9223C was designed to operate within specifications over the power supply range of 3.0 to 5.5v. the internal biasing maintains stable operating points with varying supply voltage. internally, the downconverter has internal capacitance from vdd to ground for rf decoupling of the supply line. this should be augmented with additional decoupling capacitance: 1000pf connected externally within 5mm of the package pin. a 10-ohm series resistor in the vdd line may also be added (optionally) to provide some filtering of supply line noise. connections to ground should go directly to a low-impedance ground plane. therefore, it is recommended that multiple via holes to the ground plane occur within 2mm on the inside of the package. lna input interfacing (pin 6) the TQ9223C lna was designed for low-noise operation. it makes use of an optimum noise-matching network at the input, not a conjugate match, as would be used for maximum power transfer. gamma optimum is referenced from the lna input into the noise-match network in series with 50 ohms. the gamma optimum and the noise parameters for selected frequencies are shown in the lna noise parameters table. there are several options for the physical realization of gamma optimum: a series-shunt inductor microstrip transmission line network or a series capacitor/shunt inductor. the microstrip transmission lines can easily be constructed on fr-4 or g-10 circuit boards, using standard design techniques. the lumped- element components are surface-mount elements designed for rf use. it is important that the board-level circuit establishes an impedance of gamma optimum, measured at the solder pad of pin 6. proper board design for gamma optimum eliminates the need for tuning adjustments and produces a low-noise circuit, which is tolerant of component variations. lna out (pin 9) the TQ9223C low-noise amplifier requires external output matching to transform the amplifier's output impedance to the desired system impedance (typically 50 w ) and to provide a dc bias path. the recommended output matching circuit is illustrated in the figure above and consists of a shunt low-q chip inductor and a series chip capacitor. the inductor provides a path for dc current to flow into the amplifier while simultaneously operating as the first element in the impedance transforming filter. the series capacitor acts as a block to dc current and operates as the final element in the impedance transforming filter.
TQ9223C data sheet 10 for additional information and latest specifications, see our website: www.triquint.com a number of inductor/capacitor values can be selected that will effectively transform the lna output impedance to the system impedance. the actual values selected will be governed by the trade-off between optimum impedance match and maximum ip3 match. mixer rf input (pin 11) the mixer rf input is matched close to 50 ohms and is internally dc-blocked. pin 11 may be directly connected to the filter output. the filter must be as close as possible to the mixer rf input to maintain the proper termination impedance at the lo frequency. include a shunt inductor of 33nh at the mixer rf input to improve the mixer noise performance by providing a short to ground at the if frequency. this provides a secondary benefit of slightly improved input match. mixer lo input (pin 1) the mixer lo input is matched close to 50 ohms and is internally dc-blocked. pin 1 may be directly connected to the lo input signal. a level greater than ?6dbm is recommended. standard vco outputs of ?2dbm work well. lo tuning (pin 13) a shunt l on pin 13 resonates with some internal capacitance to produce a bandpass frequency response of the lo buffer amplifier. this attenuates noise at +/- one if frequency away from the lo frequency. the approximate value of l is determined by the following equation: l=1/c (2 p f ) 2 , where c=2.2pf in practice, the value (and/or placement) of l should be empirically determined for a particular layout, since stray capacitance on the pcb layout can move the resident frequency from the expected ideal. the actual value of l should be adjusted until the buffer response (pin 1-> pin 13) produces a peak at the lo frequency. a measurement of the response may be accomplished with a simple coaxial probe ?sniffer,? in which the end is positioned 50 ? 100 mils from the inductor at pin 13. the frequency response of the lo buffer amplifier (pin 13) is directly measured on the network analyzer as the lo input (pin 1) is swept in frequency. the lo drive level should be set at approximately the operating level (-6 to -3dbm) for this measurement. this ?tuning? needs to be done only in design, not in production. mixer if interfacing the mixer if port is a high-impedance, open-drain output. the impedance is a few k ohms in parallel with less than 1pf capacitance. the if port s-parameters (s11) are listed in the table over the frequency range of 45mhz to 250mhz. it is possible to use ifs above and below this range: however, at low frequencies the noise increases, and at high frequencies the lo/if, rf/if isolation decreases. the open-drain output permits matching to any chosen filter impedance. in general, a conjugate impedance match is recommended on this port to achieve best power gain, noise figure and output 3 rd -order intercept. it is also important to properly center the tuned circuit at the desired if. this maximizes circuit robustness to component tolerances. for proper mixer operation, pin 14, the open-drain output, must also be biased to vdd. a practical matching network, which includes biasing, is shown.
TQ9223C data sheet for additional information and latest specifications, see our website: www.triquint.com 11 package pinout pin descriptions pin name pin # description and usage mixer lo in 1 mixer lo input. matched to 50 w . internally dc blocked. mixer vdd 3 mixer lo buffer vdd. bypass cap required. cntrl vdd 4 lna gain select control vdd. bypass cap required. gain select 5 lna gain select line. logic high = high gain, logic low = low gain rf in 6 lna rf input port. noise matching required. external dc blocking required. lna out 9 lna output port. open drain output requires connection to vdd and optimal impedance matching. mixer rf in 11 mixer rf input port. matched to 50 w . internally dc blocked. lo tune 13 lo buffer tuning, inductor to ground. mixer if out 14 mixer if signal port. open drain output requires connection to vdd and impedance matching to load. gnd 2,7,8, 10,12 ground connection. keep physically short for stability and performance. use several via holes immediately adjacent to the pins down to backside ground plane. 1 2 3 4 5 6 7 14 13 12 11 10 9 8 mixer lo input gnd mixer vdd cnrtl vdd gain select lna rf input gnd gnd lna output gnd mixer rf input gnd lo tune mixer if output
TQ9223C data sheet additional information for latest specifications, additional product information, worldwide sales and distribution locations, and information about triquint: web: www.triquint.com tel: (503) 615-900 0 email: info_wireless@tqs.com fax: (503) 615-8900 for technical questions and additional information on specific applications: email: info_wireless@tqs.com the information provided herein is believed to be reliable; triquint assumes no liability for inaccuracies or omissions. triquint assumes no responsibility for the use of this information, and all such information shall be entirely at the user's own risk. prices and specifications are subject to change without notice. no patent rights or licenses to any of the circuits described herein are implied or granted to any third party. triquint does not authorize or warrant any triquint product for use in life-support devices and/or systems. copyright ? 1998 triquint semiconductor, inc. all rights reserved. revision c ,april 9, 1999 12 for additional information and latest specifications, see our website: www.triquint.com package type: so-14 plastic package dimensions in inches
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