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data sheet 100635j ? 2001, conexant systems, inc., all rights reserved. october 2001 rm912 power amplifier module, 3?4 volts, for cdma/amps (824?849 mhz) the rm912 dual-mode code division multiple access (cdma)/advanced mobile phone service (amps) power amplifier is a fully matched 6-pin surface mount module designed for mobile units operating in the 824-849 mhz cellular bandwidth. this device meets stringent is95 cdma linearity requirements to beyond 28 dbm output power and can be driven to power output levels beyond 31 dbm for high efficiency fm mode operation. a single gaas microwave monolithic integrated circuit (mmic) contains all active circuitry in the module. the mmic contains on-board bias circuitry, as well as input and interstage matching circuits. the output match is realized off-chip within the module package to optimize efficiency and power performance into a 50 ? load. this device is manufactured with conexant?s gallium arsenide (gaas) heterojunction bipolar transistor (hbt) process that provides for all positive voltage dc supply operation while maintaining high efficiency and good linearity. primary bias to the rm912 can be supplied directly from a three cell nickel-cadmium, single cell lithium-ion, or other suitable battery with an output in the 3-4 volt range. power down is accomplished by setting the voltage on the low current reference pin to zero volts. no external supply side switch is needed as typical ?off? leakage is a few microamperes with full primary voltage supplied from the battery. functional block diagram rf input (2) rf output (5) vcc1 gnd gnd vcc2 vref (6, 7) (3) (1) (4) (6, 7) module mmic driver stage bias power stage bias input match inter stage match pa output match da distinguishing features low voltage positive bias supply good linearity high efficiency dual mode operation large dynamic range 6-pin package (6 x 6 x 1.5 mm) power down control applications digital cellular (cdma) analog cellular (amps) wireless local loop
electrical specifications rm912 power amplifier module, 3 ? 4 volts, for cdma/amps 2 conexant 100635j electrical specifications the following tables list the electrical characteristics of the rm912 power amplifier. table 1 lists the absolute maximum ratings for continuous operation. table 2 lists the recommended operating conditions for achieving the electrical performance listed in table 3 . table 3 lists the electrical performance of the rm912 power amplifier over the recommended operating conditions. table 1. absolute maximum ratings (1) parameter symbol minimum nominal maximum unit rf input power pin ? 3.0 6.0 dbm supply voltage vcc ? 3.4 6.0 volts reference voltage vref ? 3.0 3.3 volts case operating temperature tc ? 30 25 +110 c storage temperature tstg ? 55 ? +125 c note(s): (1) no damage assuming only one parameter is set at limit at a time with all other parameters set at or below nominal value. table 2. recommended operating conditions parameter symbol minimum nominal maximum unit supply voltage vcc 3.2 3.4 4.2 volts reference voltage vref 2.9 3.0 3.1 volts operating frequency fo 824.0 836.5 849.0 mhz operating temperature to ? 30 +25 +85 c
rm912 electrical specifications power amplifier module, 3 ? 4 volts, for cdma/amps 100635j conexant 3 table 3. electrical specifications for cdma / amps nominal operating conditions (1) characteristics condition symbol minimum typical maximum unit quiescent current vref = 3.0 v vref = 2.9 v i q i q ? ? 100.0 80.0 ? ? ma ma leakage current vref = 0 v vcc = 3.4 v i lk ?? 4.0 a gain ? digital po = 0 dbm po = 28 dbm g g p 26.0 26.0 28.0 29.0 31.0 32.5 db db gain ? analog po = 31 dbm gp 26.0 28.0 31.9 db power added efficiency analog mode digital mode po = 31 dbm po = 28 dbm paea paed 42.0 31.0 45.0 34.0 ? ? % % adjacent channel power (2) 885 khz offset 1980 khz offset po 28 dbm po 28 dbm acp1 acp2 ? ? ? 50.0 ? 58.0 ? 47.0 ? 58.0 dbc dbc harmonic suppression second third po 31 dbm po 31 dbm afo2 afo3 ? ? ? 42.0 ? 45.0 ? 33.0 ? 35.0 dbc dbc noise power in rx band 869-894 mhz po 28 dbm rxbn ?? 134.0 ? 133.0 dbm/hz noise figure ? nf ? 6.0 ? db input voltage standing wave ratio ? vswr ? 1.4:1 1.9:1 ? stability (spurious output) 5:1 vswr all phases s ??? 60.0 dbc ruggedness ? no damage po 31 dbm ru 10:1 ?? vswr note(s): (1) vcc = +3.4 v, vref = +3.0 v, freq = 836.5 mhz, tc = 25 c, unless otherwise specified. (2) acp is specified per is95 as the ratio of the total in-band power (1.23 mhz bw) to adjacent power in a 30 khz bw.
electrical specifications rm912 power amplifier module, 3 ? 4 volts, for cdma/amps 4 conexant 100635j table 4. electrical specifications limits for cdma / amps recommended operating conditions (1) characteristics condition symbol minimum maximum unit quiescent current vref = 3.0 v iq ? 140.0 ma gain ? digital po = 0 dbm po = 28 dbm g g p 25.0 24.0 31.5 34.0 db db gain ? analog po = 31dbm gp 23.0 33.4 db power added efficiency analog mode digital mode po = 31 dbm po = 28 dbm paea paed 40.0 30.0 ? ? % % adjacent channel power (2) 885 khz offset 1980 khz offset po 28 dbm po 28 dbm acp1 acp2 ? ? ? 44.0 ? 56.0 dbc dbc harmonic suppression second third po 31 dbm po 31 dbm afo2 afo3 ? ? ? 30.0 ? 30.0 dbc dbc noise power in rx band 869 ? 894 mhz po 28 dbm rxbn ? ? 131.0 dbm/hz input voltage standing wave ratio ? vswr ? 2:1 ? note(s): (1) per table 2 . (2) acp is specified per is95 as the ratio of the total in-band power (1.23 mhz bw) to adjacent power in a 30 khz bw.
rm912 characterization data power amplifier module, 3 ? 4 volts, for cdma/amps 100635j conexant 5 characterization data the following charts illustrate the characteristics of a typical rm912 power amplifier tested in the evaluation board described in the following section. the amplifier was selected by characterizing a group of devices and choosing a part with average electrical performance at both nominal and worst case (limit) conditions. figures 1 through 4 illustrate the digital signal characteristics and figures 5 through 8 illustrate the analog characteristics of the rm912 . legend figure 1. digital gain vs. output power 22.50 25.00 27.50 30.00 32.50 0.00 5.00 10.00 15.00 20.00 25.00 30.00 output power (dbm) gain (db) vref = 3.0v, vcc = 3.4v 824 mhz @ ? 30 c 824 mhz @ +25 c 824 mhz @ +85 c 837 mhz @ ? 30 c 837 mhz @ +25 c 837 mhz @ +85 c 849 mhz @ ? 30 c 849 mhz @ +25 c 849 mhz @ +85 c
characterization data rm912 power amplifier module, 3 ? 4 volts, for cdma/amps 6 conexant 100635j legend figure 2. digital adjacent channel power (acp1) vs. output power -80.00 -70.00 -60.00 -50.00 -40.00 -30.00 -20.00 0.00 5.00 10.00 15.00 20.00 25.00 30.00 output pow er (dbm) acp1 (dbc) vref = 3.0v, vcc = 3.4v, 885 khz offset figure 3. digital adjacent channel power (acp2) vs. output power -80.00 -70.00 -60.00 -50.00 -40.00 -30.00 -20.00 0.00 5.00 10.00 15.00 20.00 25.00 30.00 output pow er (dbm) acp2 (dbc) vref = 3.0v, vcc = 3.4v, 1980 khz offset 824 mhz @ ? 30 c 824 mhz @ +25 c 824 mhz @ +85 c 837 mhz @ ? 30 c 837 mhz @ +25 c 837 mhz @ +85 c 849 mhz @ ? 30 c 849 mhz @ +25 c 849 mhz @ +85 c
rm912 characterization data power amplifier module, 3 ? 4 volts, for cdma/amps 100635j conexant 7 legend figure 4. digital power added efficiency vs. output power 0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 40.00 0.00 5.00 10.00 15.00 20.00 25.00 30.00 output pow er (dbm) dpae (% ) vref = 3.0v, vcc = 3.4v figure 5. analog gain vs. output power 22.50 25.00 27.50 30.00 32.50 0.00 5.00 10.00 15.00 20.00 25.00 30.00 output power (dbm) gain (db) vref = 3.0v, vcc = 3.4v 824 mhz @ ? 30 c 824 mhz @ +25 c 824 mhz @ +85 c 837 mhz @ ? 30 c 837 mhz @ +25 c 837 mhz @ +85 c 849 mhz @ ? 30 c 849 mhz @ +25 c 849 mhz @ +85 c
characterization data rm912 power amplifier module, 3 ? 4 volts, for cdma/amps 8 conexant 100635j legend figure 6. analog power added efficiency vs. output power 0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 40.00 45.00 50.00 0.00 5.00 10.00 15.00 20.00 25.00 30.00 output power (dbm) pae (%) vref = 3.0v, vcc = 3.4v figure 7. analog second order harmonic suppression -70.00 -60.00 -50.00 -40.00 -30.00 -20.00 -10.00 0.00 10.00 15.00 20.00 25.00 30.00 output power (dbm) afo2 (dbc) vref = 3.0v, vcc = 3.4v 824 mhz @ ? 30 c 824 mhz @ +25 c 824 mhz @ +85 c 837 mhz @ ? 30 c 837 mhz @ +25 c 837 mhz @ +85 c 849 mhz @ ? 30 c 849 mhz @ +25 c 849 mhz @ +85 c
rm912 characterization data power amplifier module, 3 ? 4 volts, for cdma/amps 100635j conexant 9 legend figure 8. analog third order harmonic suppression -70.00 -60.00 -50.00 -40.00 -30.00 -20.00 -10.00 0.00 10.00 15.00 20.00 25.00 30.00 output pow er (dbm) afo3 (dbc) vref = 3.0v, vcc = 3.4v 824 mhz @ ? 30 c 824 mhz @ +25 c 824 mhz @ +85 c 837 mhz @ ? 30 c 837 mhz @ +25 c 837 mhz @ +85 c 849 mhz @ ? 30 c 849 mhz @ +25 c 849 mhz @ +85 c
characterization data rm912 power amplifier module, 3 ? 4 volts, for cdma/amps 10 conexant 100635j figure 9. digital gain vs. output power 0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 40.00 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v -30c -30c -30c 25c 25c 25c 85c 85c 85c collector voltage case temperature digital gain at 28 dbm output power (db) 824 mhz 836.5 mhz 849 mhz cold r oom t e m p e r at u r e hot figure 10. digital adjacent channel power (acp1) vs. output power -70.00 -60.00 -50.00 -40.00 -30.00 -20.00 -10.00 0.00 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v -30c -30c -30c 25c 25c 25c 85c 85c 85c collector voltage case tem perature acpr1 at 28 dbm output power (dbc) 824 mhz 836.5 mhz 849 mhz cold r oom t e m p e r at u r e hot
rm912 characterization data power amplifier module, 3 ? 4 volts, for cdma/amps 100635j conexant 11 figure 11. digital adjacent channel power (acp2) vs. output power -80.00 -70.00 -60.00 -50.00 -40.00 -30.00 -20.00 -10.00 0.00 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v -30c -30c -30c 25c 25c 25c 85c 85c 85c collector voltage case temperature acpr2 at 28 dbm output power (dbc) 824 mhz 836.5 mhz 849 mhz col d r oom t e m p e r a t u r e hot figure 12. analog gain vs. output power 0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 40.00 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v -30c -30c -30c 25c 25c 25c 85c 85c 85c collector voltage case temperature analog gain at 31 dbm output power (db) 824 mhz 836.5 mhz 849 mhz col d r oom t e m p e r a t u r e hot
characterization data rm912 power amplifier module, 3 ? 4 volts, for cdma/amps 12 conexant 100635j figure 13. analog second order harmonic suppression -70.00 -60.00 -50.00 -40.00 -30.00 -20.00 -10.00 0.00 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v -30c -30c -30c 25c 25c 25c 85c 85c 85c collector voltage case temperature afo2 at 31 dbm output power (dbc) 824 mhz 836.5 mhz 849 mhz col d r oom t e mp e r a t u r e h ot figure 14. analog third order harmonic suppression -70.00 -60.00 -50.00 -40.00 -30.00 -20.00 -10.00 0.00 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v -30c -30c -30c 25c 25c 25c 85c 85c 85c collector voltage case temperature afo3 at 31 dbm output power (dbc) 824 mhz 836.5 mhz 849 mhz cold room temperature hot
rm912 characterization data power amplifier module, 3 ? 4 volts, for cdma/amps 100635j conexant 13 figure 15. noise figure variation over recommended operating conditions 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v -30c -30c -30c 25c 25c 25c 85c 85c 85c collector voltage case tem perature noise figure (db) 824 mhz 836.5 mhz 849 mhz cold room temperature hot figure 16. voltage standing wave ratio variation over recommended operating conditions 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v 3.20v 3.40v 4.20v -30c -30c -30c 25c 25c 25c 85c 85c 85c collector voltage case tem perature vswr (:1) 824 mhz 836.5 mhz 849 mhz col d r oom t e m p e r a t u r e hot
evaluation board description rm912 power amplifier module, 3 ? 4 volts, for cdma/amps 14 conexant 100635j evaluation board description the evaluation board is a platform for testing and interfacing design circuitry. to accommodate the interface testing of the rm912, the evaluation board schematic and diagrams are included for preliminary analysis and design. figure 17 shows the basic schematic of the board for the 824 mhz to 849 mhz range. figure 18 illustrates the board layout. figure 17. evaluation board schematic figure 18. evaluation board assembly diagram 100635_003 1 2 3 6 5 4 vcc1 rfin rfin vref vref gnd rfout rfout vcc2 vcc c3 c4 c1 c2 100635_004
rm912 package dimensions and pin descriptions power amplifier module, 3 ? 4 volts, for cdma/amps 100635j conexant 15 package dimensions and pin descriptions the rm912 is a multi-layer laminate base, overmold encapsulated modular package designed for surface mount solder attachment to a printed circuit board. figure 19. rm912 package drawing table 5. pin description pin # function 1 vcc1 (1) 2 rf input 3vref 4 vcc2 (1) 5 rf output 6gnd gnd pad gnd (2) note(s): (1) all supply pins may be connected together at the supply. (2) package underside is gnd. 100635_002 1 2 3 (pin 7) r .500 typ 6 5 4 5.92/6.15 2.870 (2x) 1.981 (2x) 1.219 (2x) 1.500 typ 5.92/6.15 .762 6x 2.500 (4x) top views 2 3 6 5 4 (pin 1) front view note: solder mask pattern pad layout as seen from top looking through package. all dimensions are in millimeters.
package and handling information rm912 power amplifier module, 3 ? 4 volts, for cdma/amps 16 conexant 100635j package and handling information because this device package is sensitive to moisture absorption, it is baked and vacuum packed prior to shipment. instructions on the shipping container label regarding exposure to moisture after the container seal is broken must be followed. otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. if the part is attached in a reflow oven, the temperature ramp rate should not exceed 5 c per second. maximum temperature should not exceed 225 c and the time spent at a temperature exceeding 210 c should be limited to less than 10 seconds. if the part is manually attached, precaution should be taken to insure that the part is not subjected to a temperature exceeding 300 c for more than 10 seconds. care must be taken when attaching this product, whether it is done manually or in a production solder reflow environment. for additional details on both attachment techniques, precautions, and handling procedures recommended by conexant, please refer to application note: solder reflow, document number 101536 . production quantities of this product are shipped in the standard tape-and-reel format. for packaging details, refer to application note: tape and reel, document number 101568. figure 20. typical case markings 100635_006 conexant rm912-nn nxxxxx.xx yyww mex manufacturing part number-revision number pin 1 identifier lot number yy = manufacture year ww = week package sealed mex = country code
rm912 electrostatic discharge sensitivity power amplifier module, 3 ? 4 volts, for cdma/amps 100635j conexant 17 electrostatic discharge sensitivity the rm912 is a class i device. figure 21 lists the electrostatic discharge (esd) immunity level for each pin of the rm912 product. the numbers in figure 21 specify the esd threshold level for each pin where the i-v curve between the pin and ground starts to show degradation. the esd testing was performed in compliance with mil-std-883e method 3015.7 using the human body model. since 2000 volts represents the maximum measurement limit of the test equipment used, pins marked > 2000 v pass 2000v esd stress. various failure criteria can be utilized when performing esd testing. many vendors employ relaxed esd failure standards which fail devices only after ? the pin fails the electrical specification limits ? or ? the pin becomes completely non-functional ? . conexant employs most stringent criteria, fails devices as soon as the pin begins to show any degradation on a curve tracer. to avoid esd damage, latent or visible, it is very important the class-1 esd handling precautions listed in table 6 be used in the product assembly and test areas follow. figure 21. esd sensitivity areas table 6. precautions for gaas ics with esd thresholds greater than 200v but less than 2000v personnel grounding wrist straps conductive smocks, gloves and finger cots antistatic id badges facility relative humidity control and air ionizers dissipative floors (less than 10 9 ? to gnd) protective workstation dissipative table tops protective test equipment (properly grounded) grounded tip soldering irons conductive solder suckers static sensors protective packaging & transportation bags and pouches (faraday shield) protective tote boxes (conductive static shielding) protective trays grounded carts protective work order holders 100635_007 16 25 34 vcc1 rfin vref gnd rfout vcc2 > +1950 v < - 2000 v > +2000 v < - 2000 v > +2000 v < - 2000 v > +2000 v < - 2000 v > +1400 v < - 2000 v
electrostatic discharge sensitivity rm912 power amplifier module, 3 ? 4 volts, for cdma/amps 18 conexant 100635j
? 2001, conexant systems, inc. all rights reserved. information in this document is provided in connection with conexant systems, inc. ( ? conexant ? ) products. these materials are provided by conexant as a service to its customers and may be used for informational purposes only. conexant assumes no responsibility for errors or omissions in these materials. conexant may make changes to specifications and product descriptions at any time, without notice. conexant makes no commitment to update the information and shall have no responsibility whatsoever fo r conflicts or incompatibilities arising from future changes to its specifications and product descriptions. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. exce pt as provided in conexant ? s terms and conditions of sale for such products, conexant assumes no liability whatsoever. these materials are provided ? as is ? without warranty of any kind, either express or implied, relating to sale and/or use of conexant products including liability or warranties relating to fitness for a particular purpose, consequential or incidental damages, merchantability, or infringement of any patent, copyright or other intellectual property right. conexant further does not warrant the accuracy or completeness of the information, text, graphics or other items contained within these materials. conexant shall not be liable for any special, indirect, incidental, or consequential damages, including without limitation, lost revenues or lost profits, which may result from the use of these materials. conexant products are not intended for use in medical, lifesaving or life sustaining applications. conexant customers using or selling conexant products for use in such applications do so at their own risk and agree to fully indemnify conexant for any damages resulting from such improper use or sale. the following are trademarks of conexant systems, inc.: conexant ? , the conexant c symbol, and ? what ? s next in communications technologies ?? . product names or services listed in this publication are for identification purposes only, and may be trademarks of third parties. third-party brands and names are the property of their respective owners. for additional disclaimer information, please consult conexant ? s legal information posted at www.conexant.com , which is incorporated by reference. reader response: conexant strives to produce quality documentation and welcomes your feedback. please send comments and suggestions to tech.pubs@conexant.com. for technical questions, contact your local conexant sales office or field applications engineer. ordering information revision history references: 1. application note: solder reflow, document number 101536 2. application note: tape and reel, document number 101568 model number manufacturing part number product revision package operating temperature rm912 rm912 ? 15 15 6x6lm ? 6 ? 30 c to +85 c revision level date description a march 2000 preliminary information b march 2000 updated preliminary information c june 2000 added characterization data, released d july 2000 updated esd data e july 2000 preprint update f august 2000 web site update g august 2000 web format corrections h december 2000 add: solder reflow, temp. guidelines; revise: figure 21; revise ordering information i march 2001 revise: table 3, graphs j october 2001 revise: tables 3, 4; figures 18, 20, 21
www.conexant.com general information: u.s. and canada: (800) 854-8099 international: (949) 483-6996 headquarters ? newport beach 4311 jamboree rd. newport beach, ca. 92660-3007

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