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general description the sc1894 is the scintera ? 3rd generation of rf pa lin - earizers (rfpal?) that provide improved correction and functionality over the previous generations. the sc1894 is a fully adaptive, rfin/rfout predistortion linearization solution optimized for a wide range of amplifiers, power levels, and communication protocols. the sc1894 uses the pa output and input signals to adaptively generate an optimized correction function in order to minimize the pas self-generated distortion and impairments. using rf-domain analog signal processing enables the sc1894 to operate over wide-signal bandwidths and consume very low power. the sc1894 goes beyond linearization and provides accurate rf power measurement of rfin and rffb. design support features including spectral monitoring and aclr alarm are also available. these design sup - port features are accessed through the sc1894s serial peripheral interface (spi) bus. applications cellular infrastructure (sc1894a-00c13) ? single/multicarrier, multistandard: cdma/evdo, td-scdma, wimax ? , wcdma/hsdpa, lte, and td-lte ? bts ampliiers, rrh, booster ampliiers, repeaters, small cells, microcells, picocells, das, aas, and mimo systems microwave backhaul (sc1894a-00m13) ? bpsk, qpsk, up to 1024-qam ? if-to-rf outdoor unit (odu) ? support for adaptive coding and modulation (acm) and automatic transmit power control (atpc) up to 100db/s broadcast infrastructure (sc1894a-00c13) ? uhf digital broadcast ? dvb-t/h/t2, cmmb, isdb-t and atsc ? other applications: digital terrestrial uhf ampliiers, exciters, drivers and transmitters wide range of pas and output power ? ampliier: class a/ab and doherty ? pa process: ldmos, gan, gaas, and ingap ? average pa output power examples: cellular infrastructure: up to 49dbm terrestrial broadcast: up to 60dbm any application requiring pa linearization features rfin/rfout pa linearizer soc in standard cmos ? fully adaptive correction ? up to 28db aclr and 38db imd improvement * external reference clock support: ? 10, 13, 15.36, 19.2, 20, 26, and 30.72mhz low power consumption: ? duty-cycled (9%) feedback: 600mw ? full adaptation: 1200mw frequency range: 225mhz to 3800mhz input signal bandwidth: 1.2mhz to 75mhz packaged in 9mm x 9mm qfn package operating case temperature: -40c to +105c fully rohs compliant, green materials dual-rf power measurement beneits ease of use ? integrated rfin/rfout solution ? reduced fw development reduces system power consumption and opex reduces bom costs, area, and total volume ? smaller power supply, heat sink, and enclosure ? eliminates microcontroller and power detectors ? small implementation size (< 6.5cm 2 ) field-proven, carrier class reliability ordering information and application block diagram appears at end of data sheet. *performance dependent on amplifier, bias, and waveform. 19-6957; rev 0.4; 12/14 sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) downloaded from: http:///
detailed description introduction to predistortion using the sc1894 wideband signals in todays telecommunications systems have high peak-to-average ratios and stringent spectral regrowth specifications. these specifications place high linearity demands on power amplifiers. linearity may be achieved by backing off output power at the price of reducing efficiency. however, this increases the compo - nent and operating costs of the power amplifier. better linearity may be achieved through the use of digital pre - distortion and other linearization techniques, but many of these are time consuming and costly to implement. wireless service providers are deploying networks with wider coverage, greater subscriber density, and higher data rates. these networks require more efficient power amplifiers. additionally, the emergence of distributed architectures and active antenna systems is driving the need for smaller and more efficient power amplifier imple - mentations. further, there continues to be a strong push toward reducing the total capital and operating costs of base stations. with the sc1894, the complex signal processing is done in the rf domain. this results in a simple system-on-chip that offers wide signal bandwidth, broad frequency of operation, and very low power consumption. it is an ele - gant solution that reduces development costs and speeds time to market. applicable across a broad range of signals including 2g, 3g, 4g wireless, and other modulation types the powerful analog signal-processing engine is capable of linearizing the most efficient power ampli - fier topologies. the sc1894 is a true rfin and rfout solution, supporting modular power amplifier designs that are independent of the baseband and transceiver subsystems. the sc1894 delivers the required efficiency and performance demanded by todays wireless systems. rf power management unit (pmu) description analysis the rfin and rffb log slope and intercept are derived using a linear regression performed on data collected under nominal operating conditions. the error from linear response to the cw waveform is the db difference in out - put from the ideal output. this is a measure of the linearity of the device response to both cw and modulated wave - forms. error from the linear response to the cw waveform is a measure of relative accuracy because the system has yet to be calibrated. however, it verifies the linearity and the effect of modulation on the device response. error from the +25c performance uses the performance of a given device and waveform type as the reference. this error is largely dominated by output variations associated with temperature. the pmu codes are represented as 16-bit signed integer and are converted to dbm (referenced to the balun input) using the following formula: for rfin: rfin rfin pmu (code) 3.01 p[balun](dbm) 1024 offset (dbm) = + for rffb: rffb rffb pmu (code) 3.01 p[balun](dbm) 1024 offset (dbm) = + the offset rfin and offset rffb are dependent on end-system characteristics and also on the part-to-part variation of the rfpal. for absolute accuracy, the pmu calibration procedure outlined in the release notes and spi programming guide must be followed. measurement considerations in order to provide sufficient integration samples to allow precise measurements of signals, the default integration time (measurement window) is fixed to 40ms. note that if the measurement window is not a multiple of the system frame length, then the power-measurement window will span an incomplete frame and cause a measurement error. however; the synchronization of the frame and measurement window is not required to achieve precise measurements. tdd considerationsoperation with < 100% pa duty cycle the pmu fully supports accurate measurement of tdd waveforms. the pmu does not differentiate between samples taken when the pa is on versus when the pa is off. though easily compensated, this condition will affect the reading for waveforms with less than 100% duty cycle (e.g., tdd applications). for example, the pmu value read for a 50% duty-cycle waveform will be 3db lower than the value for the same signal but with a 100% duty cycle. calculating the offset associated with tdd mea - surements is straightforward and may be handled by the pmu depending on the system requirements. refer to the release notes for additional details on different methods. sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) www.maximintegrated.com maxim integrated 2 downloaded from: http:///
microwave block diagram pa balun rfin rfinp rffbn rfoutp input coupler rfpal correction coupler feedback coupler antenna filter/duplexer crystal oscillator regulator 1.8v 3.3v spi supply serial interface rfinn rfoutn rffbp xtali xtalo delay (0 C 4ns) cpl out cpl in attenuator balun balun to receiver rffb rfout up convert down convert lo if input 225mhzC3.8ghz balun rfinp rffbn input coupler sc1894 correction coupler feedback coupler antenna circulator / filter / duplexer regulator 1.8v 3.3v supply serial interface rfinn rffbp xtali xtalo delay cpl out cpl in attenuator balun receiver rffb spi rfout rfin no delay to 6ns optional digital i/os di/o rfoutp rfoutn ext. clock pa vdd balun optional crystal sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) www.maximintegrated.com maxim integrated 3 application block diagram downloaded from: http:///
operating case temperature-40c to +105c supply voltage (vdd33 to gnd) ......................... -0.3v to +3.8v supply voltage (vdd18 to gnd) ......................... -0.2v to +2.2v input voltage (1.8v pins) ........................ -0.2v to vdd18 + 0.2v input voltage (3.3v pins) ........................ -0.3v to vdd33 + 0.3v input into the balun (rms) ............................................ +7dbm junction temperature ...................................................... +150c storage temperature ........................................ -65c to +150c operation at +25c, avdd18 = 1.8v, avdd33 = 3.3v, dvdd18 = 1.8v, and 20mhz external clock, unless ot herwise specified. note 1: peak current includes supply decoupling network. refer to hardware design guide for proper sizing of the on-board regulators. note 2: characterized at typical voltages, +25c operating case temperature, and 20mhz input signal bw. note 3: continuous adaptation, tracking (100% duty-cycled feedback). note 4: power dissipation may be fw dependent. refer to the fw release notes for any changes to values listed above. note 5: duty-cycled feedback power dissipation averaged over on time of 100ms (9%), off time of 1.0s (91%). note 6: see operating frequency ranges table for frequency limits of each defined band. note 7: in the case where 40mhz < bw signal 75mhz and the carrier configuration is non-fully occupied, then the average power delta between the two outermost carriers must be 20db, the carrier configuration must be sta tic (no hopping), the outermost carriers must be 5mhz and the f c must be stored in eeprom. note 8: correction performance across range of input signal bws also depends on pa output power and carrier configuration. note 9: worst case over supply voltage and temperature range, guaranteed by characterization. note 10: spurious content is typically due to rfpal receiver lo leakage and is located within 1mhz of the occupied signal center frequency. parameter min typ max units supply voltage (vdd33 to gnd) 3.1 3.3 3.5 v supply voltage (vdd18 to gnd) 1.7 1.8 1.9 v supply peak current (vdd33 to gnd) (notes 1, 2, 3, 4) 100 120 ma supply peak current (vdd18 to gnd) (notes 1, 2, 3, 4) 840 900 ma average power dissipation: full-scale adaptation, track and af (notes 2, 3, 4) 1200 1400 mw average power dissipation: duty-cycled feedback (notes 2, 4, 5) 600 mw parameter symbol conditions min typ max units operating frequency (note 6) f 225 3800 mhz input signal bandwidth (note 7) bw signal 1.2 75 (note 8) mhz noise power (note 9) referred to 0dbm at pa input -140 -137 dbm/hz in-band cw spurious power (notes 9, 10) p spurlf 698mhzC960mhz, at rfout balun single ended port -76 -69 dbm in-band cw spurious power(notes 9, 10) p spurmf 1800mhzC2200mhz, at rfout balun single ended port -69 -62 dbm in-band cw spurious power(notes 9, 10) p spurhf 2400mhzC2700mhz, at rfout balun single ended port -53 -41 dbm sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) www.maximintegrated.com maxim integrated 4 absolute maximum ratingsoperating rating warning: any stress beyond the ranges indicated may damage the device permanently. the specified stress ratings do not imply functional performance in these ranges. exposure of the device to the absolute maximum ratings for extended periods of time is likely to degrade the reliability of this product. dc characteristicsradio frequency signals downloaded from: http:///
operation at +25c, avdd18 = 1.8v, avdd33 = 3.3v, dvdd18 = 1.8v, and 20mhz external clock, unless ot herwise specified. operation at +25c, avdd18 = 1.8v, avdd33 = 3.3v, dvdd18 = 1.8v, and 20mhz external clock, unless ot herwise specified. operation at +25c, avdd18 = 1.8v, avdd33 = 3.3v, dvdd18 = 1.8v, and 20mhz external clock, unless ot herwise specified. operation at +25c, avdd18 = 1.8v, avdd33 = 3.3v, dvdd18 = 1.8v, and 20mhz external clock, unless ot herwise specified. parameter symbol conditions min typ max units peak rfin_bln (notes 11, 13) p rfin_bln_p when pa operates at maximum power -6 0 +2 dbm peak rffb_bln (notes 11, 13) p rffb_bln_p -16 -8 -6 dbm rms rfin_bln (notes 12, 13) p rfin_bln -13 -10 -8 dbm rms rffb_bln (notes 12, 13) p rffb_bln -23 -18 -16 dbm rfin_bln operating range p rfin_bln rms power, over pa output power range -48 -8 dbm rffb_bln operating range p rffb_bln -56 -16 dbm parameter symbol conditions min typ max units peak rfin_bln (note 11, 13) p rfin_bln_p when pa operates at maximum power -6 0 +2 dbm peak rffb_bln (note 11, 13) p rffb_bln_p -16 -8 -6 dbm rms rfin_bln (note 12, 13) p rfin_bln -13 -10 -8 dbm rms rffb_bln (note 12, 13) p rffb_bln -23 -18 -16 dbm rfin_bln operating range p rfin_bln rms power, over pa output power range -48 -8 dbm rffb_bln operating range p rffb_bln -56 -16 dbm parameter symbol conditions min typ max units peak rfin_bln (note 11, 13) p rfin_bln_p when pa operates at maximum power -2 +4 +6 dbm peak rffb_bln (note 11, 13) p rffb_bln_p -12 -4 -2 dbm rms rfin_bln (note 12, 13) p rfin_bln -9 -6 -4 dbm rms rffb_bln (note 12, 13) p rffb_bln -19 -14 -12 dbm rfin_bln operating range p rfin_bln rms power, over pa output power range -49 -4 dbm rffb_bln operating range p rffb_bln -52 -12 dbm parameter symbol conditions min typ max units peak rfin_bln (note 11, 13) p rfin_bln_p when pa operates at maximum power +6 dbm peak rffb_bln (note 11, 13) p rffb_bln_p -4 dbm rms rfin_bln (note 12, 13) p rfin_bln -4 dbm rms rffb_bln (note 12, 13) p rffb_bln -14 dbm rfin_bln operating range p rfin_bln rms power, over pa output power range -44 -4 dbm rffb_bln operating range p rffb_bln -54 -14 dbm sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) www.maximintegrated.com maxim integrated 5 rf input range for maximum correction225mhz to 470mhzrf input range for maximum correction470mhz to 700mhz rf input range for maximum correction700mhz to 2700mhz rf input range for maximum correction2700mhz to 3300mhz downloaded from: http:///
operation at +25c, avdd18 = 1.8v, avdd33 = 3.3v, dvdd18 = 1.8v, and 20mhz external clock, unless ot herwise specified. guaranteed performance across worst-case supply voltage and temperature range, unless otherwise specified. note 11: peak power is defined as the 10 -4 point on the ccdf (complementary cumulative distribution function) of the signal. note 12: power (max rms) + par must not exceed the peak power limits specified above, there is no maximum li mit on the par. note 13: referred to 50 impedance into a 1:2 balun. note 14: default is -07. user may reprogram for other ranges listed above. refer to spi programming guide for programming information. parameter symbol conditions min typ max units peak rfin_bln (note 11, 13) p rfin_bln_p when pa operates at maximum power +3 +9 +11 dbm peak rffb_bln (note 11, 13) p rffb_bln_p -12 -4 -2 dbm rms rfin_bln (note 12, 13) p rfin_bln -4 -1 +1 dbm rms rffb_bln (note 12, 13) p rffb_bln -19 -14 -12 dbm rfin_bln operating range p rfin_bln rms power, over pa output power range -41 +1 dbm rffb_bln operating range p rffb_bln -52 -12 dbm parameter symbol conditions min typ max units cmos input logic-low v il -0.3 +0.8 v cmos input logic-high v ih vdd = 3.3v 2.0 v cmos output logic-low v ol 0.4 v cmos output logic-high v oh vdd = 3.3v 2.4 v sdo cmos output current i ol /i oh three-state -16.0 +16.0 ma stato cmos output current i ol /i oh open drain -16.0 0.0 ma frequency range (note 14) recommended applications designation 225mhz to 520mhz tv white space -02 225mhz to 960mhz uhf broadcast, tv white space, public safety -03 520mhz to 1040mhz low-band cellular (698mhz to 960mhz), uhf broadcast, tv white space, public safety -04 1040mhz to 2080mhz lte for japan (1400mhz to 1510mhz) -05 698mhz to 2700mhz low- and high-band cellular, if for satcomm (950mhz to 145mhz) -06 1800mhz to 2700mhz (default) high-band cellular (1800mhz to 2700mhz) -07 2700mhz to 3500mhz -08 3300mhz to 3800mhz microwave (if), wimax, lte -09 sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) www.maximintegrated.com maxim integrated 6 rf input range for maximum correction3300mhz to 3800mhzdigital i/odc characteristics operating frequency ranges downloaded from: http:///
guaranteed performance across worst-case supply voltage and temperature range, unless otherwise specified.guaranteed performance across worst-case supply voltage and temperature range, unless otherwise specified. guaranteed performance across worst-case supply voltage and temperature range unless otherwise specified. note 15: selecting an external reference clock frequency other than 20mhz requires programming the sc1894 th rough the spi bus. see spi programming guide and hw design guide for more information. note 16: user may program the sc1894 to accept the following clock frequencies: 10, 13, 15.36, 19.2, 20, 26 and 30.72mhz. parameter symbol conditions min typ max units user programmable external clock (notes 15, 16) f clk 10 20 30.72 mhz external clock frequency accuracy 1 % external clock frequency drift including aging and temperature 100 ppm duty cycle square wave 45 55 % external clock amplitude v clk sine or square wave 500 1500 mv p-p external clock phase noise pn clk at 100khz offset -130 dbc/hz parameter symbol conditions min typ max units esr 50 ? capacitive load to ground 10 12 pf frequency accuracy 250 ppm frequency drift including aging and temperature 100 ppm parameter symbol conditions min typ max units select setup time t ss 100 ns select hold time t sh 250 ns select disable time t dis 100 ns data setup time t ds 25 ns data hold time t dh 45 ns rise time t r 25 ns fall time t f 25 ns clock period t cp 250 ns clock high time t ch 100 ns time to output valid t ov 100 ns output data disable t od 0 ns sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) www.maximintegrated.com maxim integrated 7 digital i/oexternal clock (xtali) crystal requirements serial peripheral interface (spi) bus speciications downloaded from: http:///
operation at +25c, avdd18 = 1.8v, avdd33 = 3.3v, and dvdd18 = 1.8v, unless otherwise specified. min /max values are at -40c < t case < +105c, unless otherwise noted. rf power measurement unit (pmu) parameter symbol conditions min typ max units eeprom write/erase cycles page mode, +25c 1m e/w cycles parameter symbol conditions (notes 17, 18) min typ max units frequency range (note 19) fc range 698 2500 mhz rfin_bln range (note 20) p rfinrange rms power, referred to 50 impedance into a 1:2 balun -44 (note 21) -34 (note 22) -4 dbm rffb_bln range (note 20) p rffbrange rms power, referred to 50 impedance into a 1:2 balun -52 (note 21) -42 (note 22) -12 dbm rfin_bln log slope rfinslope linear regression between -4 and -39dbm, 100 readings 341.3 lsb/db rffb_bln log slope rffbslope linear regression between -12 and -47dbm, 100 readings 341.3 lsb/db rfin_bln log slope variation rfinslope linear regression between -4 and -39dbm, 100 readings 1.2 lsb/db rffb_bln log slope variation rffbslope linear regression between -12 and -47dbm, 100 readings 1.2 lsb/db ssn sclk sdi sdo t ss t ds it is required that the spi bus be connected to a host controller in order to read or write customer-accessible parameters. t dh t cp t ch t r t f t sh t od t ov t dis sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) www.maximintegrated.com maxim integrated 8 eeprom endurance timing diagram rf power measurement electrical characteristics downloaded from: http:///
operation at +25c, avdd18 = 1.8v, avdd33 = 3.3v, and dvdd18 = 1.8v, unless otherwise specified. min /max values are at -40c < t case < +105c, unless otherwise noted. rf power measurement unit (pmu) (continued) parameter symbol conditions (notes 23, 24) min typ max units rfin_bln log intercept rfinintercept linear regression between -4 and -34dbm 0 dbm rffb_bln log intercept rffbintercept linear regression between -12 and -42dbm 0 dbm rfin_bln log intercept variation rfinintercept linear regression between -4 and -34dbm, 100 readings of single ic 0.12 db rffb_bln log intercept variation rffbintercept linear regression between -12 and -42dbm, 100 readings of single ic 0.12 db rfin_bln error as referred to best-fit line (notes 25, 26) p rfin_ fiterror -4 to -34dbm-34 to -44dbm -0.30 -2 +0.30 +2 dbdb rffb_bln error as referred to best-fit line (notes 25, 26) p rffb_ fiterror -12 to -42dbm-42 to -52dbm -0.30 -2 +0.30 +2 dbdb rfin_bln, rffb_bln deviation from 2-tone cw response (note 27) 6.5 db par (wcdma 1 carrier) 10 db par (wcdma 1 carrier) 10 db par (lte 20 carrier) 0.10.1 0.1 dbdb db rfin_bln deviation vs. temperature (notes 25, 27) p rfintemp_ dev deviation from output at 25c, ?40c < t case < +105c, -4 to -34dbm, at 1800mhz-34 to -44dbm, at 1800mhz -4 to -34dbm, at 2500mhz -34 to -44dbm, at 2500mhz -0.55 -2 -0.7 -2 0.10.5 0.1 0.5 +0.55 +2 +0.7 +2 dbdb db db rffb_bln deviation vs. temperature (notes 25, 27) p rffbtemp_ dev deviation from output at +25c, ?40c < t case < +105c, -12 to -42dbm, at 1800mhz-42 to -52dbm, at 1800mhz -12 to -42dbm, at 2500mhz -42 to -52dbm, at 2500mhz -0.4 -2 -0.5 -2 0.10.5 0.1 0.5 +0.4 +2 +0.5 +2 dbdb db db rfin_bln deviation vs. supply voltage p rfinvdd18 _dev p rfinvdd33 _dev 1.7v < avdd18 < 1.9v 3.1v < avdd33 < 3.5v +0.7 -0.5 db/vdb/v rffb_bln deviation vs. supply voltage p rffbvdd18 _dev p rffbvdd33 _dev 1.7v < avdd18 < 1.9v 3.1v < avdd33 < 3.5v +0.7 -0.5 db/vdb/v sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) www.maximintegrated.com maxim integrated 9 rf power measurement electrical characteristics (continued) downloaded from: http:///
operation at +25c, avdd18 = 1.8v, avdd33 = 3.3v, and dvdd18 = 1.8v, unless otherwise specified. min /max values are at -40c < t case < +105c, unless otherwise noted. note 17: test conditions: 2-tone cw (3db par), 5mhz bandwidth and centered at 2140 mhz unless otherwise specified. note 18: power measurement updated about every 340ms. the integration time (measurement window) fixed to 40 ms. note 19: for operation above 2500mhz, please contact factory. note 20: rms power (max) + peak to average ratio (par) must not exceed the peak power limits specified in th e respective ic data sheets. as long as this condition is met, there is no limitation on the maximum par. note 21: when rfin_bln and rffb_bln are measured sequentially or independently. note 22: when rfin_blm and rffb_bln are measured simultaneously. note 23: test conditions: 2-tone cw (3db par), 5mhz bandwidth and centered at 2140mhz unless otherwise specified. note 24: power measurement updated every 340ms. the integration time (measurement window) fixed to 40ms. note 25: when rfin_bln and rffb_bln are measured sequentially or independently. note 26: guaranteed by test (at t case = +25c) and characterization. note 27: guaranteed by characterization. rf power measurement unit (pmu) (continued) parameter symbol conditions (notes 23, 24) min typ max units (rfin_bln) - (rffb_bln) log slope rfin-rffbslope 0 lsb/db (rfin_bln) - (rffb_bln) log slope variation rfin- rffbslope 1.2 lsb/db (rfin_bln) - (rffb_bln) error as referred to best-fit line (note 26) rfin_bln range (rffn_bln = rfin_bln C 7db) -4 to -24dbm -24 to -34dbm -0.30 -2 +0.30 +2 dbdb (rfin_bln) - (rffb_bln) deviation from 2-tone cw response (note 27) 6.5db par (wcdma 1 carrier) 10db par (wcdma 1 carrier) 9.1db par (wcdma 12 carriers) 0.10.1 0.1 dbdb db (rfin_bln) - (rffb_bln) deviation vs. temperature (note 27) deviation from output at 25c, ?40c < t case < +105c, -4 to -24dbm, at 2200mhz-24 to -34dbm, at 2200mhz -0.55 -2 0.10.5 +0.55 +2 dbdb sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) www.maximintegrated.com maxim integrated 10 rf power measurement electrical characteristics (continued) downloaded from: http:///
data presented in the igures on the following pages are based on typical operating conditions at +25 c, avdd18 = 1.8v, avdd33 = 3.3v, and dvdd18 = 1.8v, unless otherwise speciied. conditions: waveforms: wcdma 2-carrier 6.5db par and lte 10mhz 7.5db par ?40c < t case < +105c a/dvdd18 = 1.7v/1.9v, avdd33 = 3.1v/3.5v measurements (pmu error as referred to best-fit line)figure 1. rfin_bln pmu error as referred to best-fit line vs. rfin rms power, frequency = 1800mhz figure 3. rfin_bln pmu error as referred to best-fit line vs. rfin rms power, frequency = 2500mhz figure 2. rffb_bln pmu error as referred to best-fit line vs. rffb rms power, frequency = 1800mhz figure 4. rffb_bln pmu error as referred to best-fit line vs. rffb rms power, frequency = 2500mhz maxim integrated 11 www.maximintegrated.com sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) typical operating characteristics downloaded from: http:///
data presented in the igures on the following pages are based on typical operating conditions at +25 c, avdd18 = 1.8v, avdd33 = 3.3v, and dvdd18 = 1.8v, unless otherwise speciied. conditions: waveforms: wcdma-2 carrier 6.5db par and lte 10mhz 7.5db par ?40c < t case < +105c a/dvdd18 = 1.7v/1.9v, avdd33 = 3.1v/3.5v measurements (pmu deviation from +25c) figure 5. rfin_bln pmu deviation from +25c vs. rfin rms power, frequency = 1800mhz figure 7. rfin_bln pmu deviation from +25c vs. rfin rms power, frequency = 2500mhz figure 6. rffb_bln pmu deviation from +25c vs. rffb rms power, frequency = 1800mhz figure 8. rffb_bln pmu deviation from +25c vs. rffb rms power, frequency = 2500mhz maxim integrated 12 www.maximintegrated.com sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) typical operating characteristics (continued) downloaded from: http:///
resetn sclk sdo sdissn testsel1 dvdd18 loadenb dvdd33 stato dgpin1 dvdd18 avdd18 1 64 49 48 33 17 16 gnd mgpout1 avdd18 avdd33 gnd rfoutp rfoutn gnd fltcap0p rfinn gnd gnd rfinp avdd33 rffbn gnd gnd rffbp avdd18 dvdd18 xtalo xtali fltcap1n fltcap2p fltcap0n avdd18 avdd18 fltcap3p fltcap3n dvdd18 dgpin0 23 4 5 6 7 8 9 10 11 12 13 14 15 39 3837 36 35 34 40 4645 44 43 42 41 47 18 19 20 21 22 23 24 25 26 27 28 29 30 31 avdd18 fltcap2n dvdd18 sc1894 avdd33 63 62 61 60 59 58 57 56 55 54 53 52 51 50 testsel2 avdd18 avdd18 mgpout3 mgpout2 gnd bgres 65 - gndpad wdtenb fltcap1p avdd18 avdd33 adcin1n adcin1p adcin0n adcin0p mgpout0 32 top view sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) www.maximintegrated.com maxim integrated 13 pin coniguration downloaded from: http:///
pin name type function 1 dvdd18 supply +1.8v dc supply voltage for digital circuits. 2 mgpout0 analog out do not connect. reserved for internal use. 3 mgpout1 analog out do not connect. reserved for internal use. 4 avdd18 supply +1.8v dc supply voltage for analog circuits. 5 avdd33 supply +3.3v dc supply voltage for analog circuits. 6 gnd supply ground. 7 gnd rf shield ground for shield of rf signal. 8 rfoutp analog out rf output signal, differential output. see s-parameters for complex impedance values. 9 rfoutn 10 gnd rf shield ground for shield of rf signal. 11 avdd18 supply +1.8v dc supply voltage for analog circuits. 12 avdd18 supply +1.8v dc supply voltage for analog circuits. 13 mgpout2 analog out do not connect. reserved for internal use. 14 mgpout3 analog out do not connect. reserved for internal use. 15 gnd supply ground. 16 bgres analog in bandgap resistor. 17 avdd33 supply +3.3v dc supply voltage for analog circuits. 18 gnd rf shield ground for shield of rf signal. 19 rfinp analog in rf input signal, differential input. see s-parameters for complex impedance values. 20 rfinn analog in 21 gnd rf shield ground for shield of rf signal. 22 avdd18 supply +1.8v dc supply voltage for analog circuits. 23 avdd33 supply +3.3v dc supply voltage for analog circuits. 24 adcin0p analog in do not connect. reserved for internal use. 25 adcin0n analog in do not connect. reserved for internal use. 26 adcin1p analog in do not connect. reserved for internal use. 27 adcin1n analog in do not connect. reserved for internal use. 28 avdd33 supply +3.3v dc supply voltage for analog circuits. 29 gnd rf shield ground for shield of rf signal. 30 rffbp analog in rf feedback signal, differential input. see s-parameters for complex impedance values. 31 rffbn 32 gnd rf shield ground for shield of rf signal. 33 fltcap0p analog out dedicated external ilter capacitor #0. 34 fltcap0n 35 avdd18 supply +1.8v dc supply voltage for analog circuits. 36 avdd18 supply +1.8v dc supply voltage for analog circuits. sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) www.maximintegrated.com maxim integrated 14 pin description downloaded from: http:///
pin name type function 37 fltcap1p analog out dedicated external ilter capacitor #1. 38 fltcap1n 39 fltcap2p analog out dedicated external ilter capacitor #2. 40 fltcap2n 41 avdd18 supply +1.8v dc supply voltage for analog circuits. 42 avdd18 supply +1.8v dc supply voltage for analog circuits. 43 fltcap3p analog out dedicated external ilter capacitor #3. 44 fltcap3n 45 xtali analog in crystal input. for standard internal clock, connect crystal or ceramic resonator from xtali to xtalo. may alternatively be driven by an external clock. 46 xtalo analog out crystal output. excitation driver for crystal or ceramic resonator. 47 avdd18 supply +1.8v dc supply voltage for analog circuits. 48 dvdd18 supply +1.8v dc supply voltage for digital circuits. 49 resetn digital in reset when "low". has internal pull-up to dvdd33. 50 wdtenb digital in watch dog timer enable. wdtenb enabled when high. has internal pull-up to dvdd33. see applications schematic for further details. 51 sclk digital in spi clock. has internal pull-down to gnd. 52 ssn digital in spi slave select enabled "low". has internal pull-up to dvdd33. 53 sdi digital in spi slave data input to rfpal. has internal pull-down to gnd. 54 sdo digital out spi slave data output from rfpal. tri-state. dvdd33 logic. 55 dvdd18 supply +1.8v dc supply voltage for digital circuits. 56 dgpin1 digital in digital general purpose input 1. has internal pull-up to dvdd33. see firmware release notes for further details. 57 stato digital out general purpose status output as deined in firmware release notes. open-drain output with internal pull-up to dvdd33. 58 dvdd33 supply +3.3v dc supply voltage for digital circuits. 59 dvdd18 supply +1.8v dc supply voltage for digital circuits. 60 loadenb digital in load enable. required for fw upgrades. has internal pull-down to gnd. see applications schematic for further details. 61 testsel1 reserved do not connect. reserved for internal use.has internal pull-down to gnd. 62 testsel2 reserved do not connect. reserved for internal use.has internal pull-down to gnd. 63 dgpin0 digital in digital general purpose input 0. do not connect. reserved for future use. has internal pull-down to gnd. see applications schematic for further details. 64 dvdd18 supply +1.8v dc supply voltage for digital circuits. 65 gndpad supply common ground for entire integrated circuit. also provides path for thermal dissipation. sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) www.maximintegrated.com maxim integrated 15 pin description (continued) downloaded from: http:///
* recommended for new designs. line top mark description 1 scintera company name 2 sc1894 product part number 2 a product revision 2 -00-13 product coniguration (pc): -00 = all features enabled -13 = all features enabled* 3 xxxxxxxxxx assembly lot number(up to 10 characters) 4 ww date code - work week 4 yy date code - year 4 rrrr reserved scinterasc1894a-00 xxxxxxxxxx wwyyrrrr scinterasc1894a-13 xxxxxxxxxx wwyyrrrr sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) www.maximintegrated.com maxim integrated 16 top mark esd (electrostatic discharge) sensitive device. although this product incorporates esd protection circuitry, permanent damage may occur on devices subjected to electrostatic discharges. proper esd precautions are recommended to avoid performance degradation or device failure. test methodology class voltage unit human body model (per jesd22-a114) 1c 1000 v charge device model (per jesd22-c101) ii 250 v esdelectrostatic discharge (esd) protection characteristics downloaded from: http:///
shipping designator: e = 7in tape and reel append shipping designator (e) at end of part number. if left blank, designates bulk shipping option. * recommended for new designs. * to be ordered separately from the evaluation kit. part number description sc1894a-00b00 ic, rfpal, 225mhzC3800mhz, fw4.1.05.01 sc1894a-00b13 ic, rfpal, 225mhzC3800mhz, fw4.1.05.01 sc1894a-00c13* ic, rfpal, 225mhzC3800mhz, fw4.1.03.08 (for all other applications) sc1894a-00m13* ic, rfpal, 225mhzC3800mhz, fw4.1.07.00 (for microwave applications) part number description sc1894-evk200 eval kit, rfpal, 225-470mhz sc1894-evk500 eval kit, rfpal, 470-928mhz sc1894-evk900 eval kit, rfpal, 698-960mhz sc1894-evk1500 eval kit, rfpal, 1350-1800mhz sc1894-evk1900 eval kit, rfpal, 1800-2200mhz sc1894-evk2400 eval kit, rfpal, 2300-2700mhz SC1894-EVK3400 eval kit, rfpal, 3300-3800mhz sc-usb-spi* adapter, spi-usb interface/controller package type package code outline no. land pattern no. 64 qfn k6499mk+1b 21-0765 90-0605 evaluation kit ordering information ordering information package information for the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) www.maximintegrated.com maxim integrated 17 downloaded from: http:///
revision number revision date description pages changed 0.2 9/14 initial release 0.3 12/14 added part number for microwave applications 1, 4 0.4 12/14 added microwave block diagram 3 maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and speciications without n otice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. ? 2014 maxim integrated products, inc. 18 sc1894 225mhz to 3800mhz rf power ampliier linearizer (rfpal) revision history for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com. downloaded from: http:///

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