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for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com power detectors - s m t 11 11 - 1 HMC1020LP4E general descriptions features functional diagram t he hm c 1020lp4 e power detector is designed for r f power measurement and control applications for frequencies up to 3.9 ghz. t he detector provides an accurate r m s representation of any broadband, single-ended r f/if input signal. t he output is a tem - perature compensated, monotonic representation of real signal power, measured with an input sensing range of 72 db. t he hm c 1020lp4 e is ideally suited to those wide bandwidth, wide dynamic range applications requir - ing repeatable measurement of real signal power, especially where r f/if wave shape and/or crest factor change with time. t he integration bandwidth of the hm c 1020lp4 e is digitally programmable with the use of input pins sc i1-4 over a range of more than 3 decades. t his allows the user to dynamically set the operation bandwidth and also permits the detection of different types of modulations on the same platform. hm c 1020lp4 e features an internal op-amp at the out - put stage, which provides for slope / intercept adjust - ments and enables controller application. broadband s ingle- e nded r f input 1 db detection accuracy to 3.9 ghz input dynamic r ange: -65 dbm to +7 dbm r f s ignal w ave s hape & c rest factor independent digitally programmable integration bandwidth e xcellent t emperature s tability power-down mode 24 lead 4x4mm s m t package: 16mm2 typical applications t he hm c 1020lp4 e is ideal for: ? log C> root-mean-square (rms) conversion ? tx/rx signal strength indication (tssi/rssi) ? rf power amplifer efficiency control ? receiver automatic gain control ? transmitter power control rms power detector single-ended, dc - 3.9 ghz v02.0511 electrical specifcations i t a = +25 c, vcc = 5v, sci4 = sci1 = 0v, sci3 = sci2 = 5v, unless otherwise noted parameter t yp. t yp. t yp. t yp. t yp. t yp. t yp. units dynamic range (1db error) [1] input frequency 100 900 1900 2200 2700 3500 3900 mhz single ended input confguration 72 72 71 70 66 58 53 db deviation vs temperature: (over full temperature range -40 c to 85 c). deviation is measured from reference, which is the same wcdma input at 25 c. 1 db [1] with wcdma 4 carrier (tmi1-64 dpch)
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com p ower d etectors - s m t 11 11 - 2 electrical specifcations ii t a = +25 c, vcc = 5v, sci4 = sci1 = 0v, sci3 = sci2 = 5v, unless otherwise noted HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz rmsout vs. pin with different modulations @ 1900 mhz [1] rmsout error vs. pin with different modulations @ 1900 mhz [1] [1] data was taken at s ci4= s ci1=0v, s ci3= s ci2=5v, shortest integration time is for sc i=0000, allowed longest integration time is for sc i=1100 parameter t yp. t yp. t yp. t yp. t yp. t yp. t yp. units input frequency 100 900 1900 2200 2700 3500 3900 mhz modulation deviation (output deviation from reference, which is measured with cw input at equivalent input signal power) wcdma 4 carrier (tm1-64 dpch) at +25 c 0.1 0.1 0.1 0.1 0.1 0.1 0.1 db wcdma 4 carrier (tm1-64 dpch) at +85 c 0.1 0.1 0.1 0.1 0.1 0.1 0.1 db wcdma 4 carrier (tm1-64 dpch) at -40 c 0.1 0.1 0.1 0.1 0.1 0.1 0.1 db logarithmic slope and intercept [1] logarithmic s lope 35.0 35.2 36.0 36.6 37. 9 41.5 44.4 mv/db logarithmic intercept -68.2 - 67. 9 -66.5 -65.6 -63.6 -58.7 -55.3 dbm max. input power at 1db e rror 7 7 7 7 5 2 0 dbm min. input power at 1db e rror -65 -65 -64 -63 -61 -56 -53 dbm [1] with wcdma 4 carrier (tm1-64 dpch) 0 0.5 1 1.5 2 2.5 3 -70 -60 -50 -40 -30 -20 -10 0 10 ideal cw wcdma 4 carriers wcdma1 cdma2000 ltedw rmsout (v) input power (dbm) -4 -3 -2 -1 0 1 2 3 4 -70 -60 -50 -40 -30 -20 -10 0 10 cw wcdma 4 carriers wcdma1 cdma2000 ltedw error (db) input power (dbm)
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com power detectors - s m t 11 11 - 3 electrical specifcations iii t a = +25 c, vcc = 5v, sci4 = sci1 = 0v, sci3 = sci2 = 5v, unless otherwise noted parameter c onditions min t yp. max units single-ended input confguration input network r eturn loss up to 3.9 ghz > 15 db input r esistance between inp and inn between pins 3 and 4 100 ? input voltage r ange a c coupled peak voltage at inp 0.85 v rmsout output o utput voltage r ange 0.13 to 2.7 v s ource/ s ink c urrent c ompliance r m so u t held at v cc /2 8 / -0.55 ma output slew rate (rise / fall) s ci4= s ci3= s ci2= s ci1=0v, c ofs=1nf 24 / 1.9 10 6 v/s vset input (negative feedback terminal) input voltage r ange for control applications with nominal slope/intercept settings 0.13 to 2.7 v input r esistance 5 m? sci1-4 inputs, enx logic input (power down control) input high voltage 0.7xv cc v input low voltage 0.3xv cc v input high c urrent 1 a input low c urrent 1 a input c apacitance 0.5 pf power supply s upply voltage 4.5 5 5.5 v s upply c urrent with no input power 55 ma s upply c urrent with pin = -20dbm 58 ma s tandby mode s upply c urrent 5 ma HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com p ower d etectors - s m t 11 11 - 4 rmsout & error vs. pin @ 100 mhz [1][2] rmsout & error vs. pin @ 1900 mhz [1][2] rmsout & error vs. pin @ 900 mhz [1][2] rmsout & error vs. pin @ 2200 mhz [1][2] rmsout & error vs. pin @ 2700 mhz [1][2] rmsout & error vs. pin @ 3500 mhz [1][2] [1] data was taken at s ci4= s ci1=0v, s ci3= s ci2=5v, shortest integration time is for sc i=0000, allowed longest integration time is for sc i=1100 [2] wc dma 4 carriers input waveform HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz 0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 -4 -3 -2 -1 0 1 2 3 4 -70 -60 -50 -40 -30 -20 -10 0 10 err +25c err +85c err -40c ideal logout +25c logout +85c logout -40c rmsout (v) error (db) input power (dbm) 0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 -4 -3 -2 -1 0 1 2 3 4 -70 -60 -50 -40 -30 -20 -10 0 10 err +25c err +85c err -40c ideal logout +25c logout +85c logout -40c rmsout (v) error (db) input power (dbm) 0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 -4 -3 -2 -1 0 1 2 3 4 -70 -60 -50 -40 -30 -20 -10 0 10 err +25c err +85c err -40c ideal logout +25c logout +85c logout -40c rmsout (v) error (db) input power (dbm) 0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 -4 -3 -2 -1 0 1 2 3 4 -70 -60 -50 -40 -30 -20 -10 0 10 err +25c err +85c err -40c ideal logout +25c logout +85c logout -40c rmsout (v) error (db) input power (dbm) 0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 -4 -3 -2 -1 0 1 2 3 4 -70 -60 -50 -40 -30 -20 -10 0 10 err +25c err +85c err -40c ideal logout +25c logout +85c logout -40c rmsout (v) error (db) input power (dbm) 0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 -4 -3 -2 -1 0 1 2 3 4 -70 -60 -50 -40 -30 -20 -10 0 10 err +25c err +85c err -40c ideal logout +25c logout +85c logout -40c rmsout (v) error (db) input power (dbm)
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com power detectors - s m t 11 11 - 5 intercept vs. frequency [1][2] rmsout & error vs. pin @ 3900 mhz [1][2] slope vs. frequency [1][2] rmsout vs. pin with wcdma 4 carrier @ +25 c [1] rmsout error vs. pin with wcdma 4 carrier @ +25 c [1] rmsout error vs. pin with wcdma 4 carrier @ +85 c wrt +25 c response [1] [1] data was taken at s ci4= s ci1=0v, s ci3= s ci2=5v, shortest integration time is for sc i=0000, allowed longest integration time is for sc i=1100 [2] wc dma 4 carriers input waveform HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz 0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 -4 -3 -2 -1 0 1 2 3 4 -70 -60 -50 -40 -30 -20 -10 0 10 err +25c err +85c err -40c ideal logout +25c logout +85c logout -40c rmsout (v) error (db) input power (dbm) -80 -75 -70 -65 -60 -55 -50 0 1000 2000 3000 4000 +25c +85c -40c frequency (mhz) intercept (dbm) 30 35 40 45 50 0 1000 2000 3000 4000 +25c +85c -40c frequency (mhz) slope (mv/db) 0 0.5 1 1.5 2 2.5 3 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2200mhz 2700mhz 3500mhz 3900mhz input power (dbm) rmsout (v) -4 -3 -2 -1 0 1 2 3 4 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2200mhz 2700mhz 3500mhz 3900mhz input power (dbm) error (db) -4 -3 -2 -1 0 1 2 3 4 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2200mhz 2700mhz 3500mhz 3900mhz input power (dbm) error (db)
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com p ower d etectors - s m t 11 11 - 6 rmsout error vs. pin with wcdma 4 carrier @ -40 c wrt +25 c response [1] rmsout vs. pin with cw @ +25 c [1] rmsout error vs. pin with cw @ +25 c [1] rmsout vs. pin w/ cw & wcdma 4 carrier @ 1900 mhz & +25 c [1] reading error for wcdma 4 carrier wrt cw response @ +25 c [1] rmsout vs. pin w/ cw & wcdma 4 carrier @ 1900 mhz & +85 c [1] [1] data was taken at s ci4= s ci1=0v, s ci3= s ci2=5v, shortest integration time is for sc i=0000, allowed longest integration time is for sc i=1100 HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz -4 -3 -2 -1 0 1 2 3 4 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2200mhz 2700mhz 3500mhz 3900mhz input power (dbm) error (db) 0 0.5 1 1.5 2 2.5 3 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2200mhz 2700mhz 3500mhz 3900mhz input power (dbm) rmsout (v) -4 -3 -2 -1 0 1 2 3 4 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2700mhz 2200mhz 3500mhz 3900mhz input power (dbm) error (db) 0 0.5 1 1.5 2 2.5 3 -70 -60 -50 -40 -30 -20 -10 0 10 cw wcdma input power (dbm) rmsout (v) -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2200mhz 2700mhz 3500mhz 3900mhz input power (dbm) error (db) 0 0.5 1 1.5 2 2.5 3 -70 -60 -50 -40 -30 -20 -10 0 10 cw wcdma input power (dbm) rmsout (v)
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com power detectors - s m t 11 11 - 7 reading error for wcdma 4 carrier wrt cw response @ -40 c [1] reading error for wcdma 4 carrier wrt cw response @ +85 c [1] output response with sci = 0000 @ 1900 mhz rmsout vs. pin w/ cw & wcdma 4 carrier @ 1900 mhz & -40 c [1] output response with sci = 1100 @ 1900 mhz typical supply current vs. pin, vcc = 5v [1] data was taken at s ci4= s ci1=0v, s ci3= s ci2=5v, shortest integration time is for sc i=0000, allowed longest integration time is for sc i=1100 HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2200mhz 2700mhz 3500mhz 3900mhz input power (dbm) error (db) 0 0.5 1 1.5 2 2.5 3 -70 -60 -50 -40 -30 -20 -10 0 10 cw wcdma input power (dbm) rmsout (v) -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2200mhz 2700mhz 3500mhz 3900mhz input power (dbm) error (db) 0 0.5 1 1.5 2 2.5 3 -5 0 5 10 15 20 25 -20246810 -20 dbm 0 dbm rmsout (v) rf enable voltage (v) time (us) msout rf enable rf on rf off rf off 0 0.5 1 1.5 2 2.5 3 -5 0 5 10 15 20 25 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 -20 dbm 0 dbm rmsout (v) rf enable voltage (v) time (ms) rmsout rf enable rf on rf off rf off 40 45 50 55 60 65 70 -70 -60 -50 -40 -30 -20 -10 0 10 +25c +85c -40c input power (dbm) supply current (ma)
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com p ower d etectors - s m t 11 11 - 8 input return loss vs. frequency HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz -30 -25 -20 -15 -10 -5 0 0123456 frequency (ghz) return loss (db) 0 300 600 900 1200 1500 1800 0.1 1 10 100 1000 10000 100000 0123456789101112 rise time fall time ripple with wcdma1 ripple with wcdma4 ripple with 8 tone (1khz seperation) ripple with 8 tone (10khz seperation) output ripple peak-peak (mv) rise time & fall time (us) integration setting (in decimal) output ripple & rise/fall time vs. integration setting [sci4,sci3,sci2,sci1] in decimal
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com power detectors - s m t 11 11 - 9 outline drawing n otes : 1. l e adf r am e ma ter ial: co pp er all o y 2. dim e n s i o n s a re in in c h es [millim eters ]. 3. l e ad s pa c ing to l er an ce i s n o n- c umula t iv e 4. pad bu rr l e ng t h s hall b e 0.15mm maximum. pad bu rr h e igh t s hall b e 0.05mm maximum. 5. pa c kag e w a r p s hall n ot e x cee d 0.05mm. 6. all g ro und l e ad s and g ro und paddl e mu st b e so ld ere d to p c b r f g ro und. 7. re f er to hm c appli c a t i o n n ote f or s ugg este d p c b land pa tter n. package information absolute maximum ratings power supply voltage (vcc) 5.6v s ingle e nded r f input power 10 dbm s ingle e nded input voltage v cc + 0.6v junction t emperature 125 c continuous pdiss (t = 85 c) (derate 32.45 mw/ c above 85 c) 1.39 w thermal resistance (r th ) (junction to ground paddle) 28.68 c/ w s torage t emperature -65 to +150 c o perating t emperature -40 to +85 c esd sensitivity (hbm) c lass 1b e l ectrost a t ic se n s i t iv e de vi ce o b ser v e handling p rec au t io n s part number package body material lead finish m s l r ating package marking [1] hm c 1020lp4 e r oh s -compliant low s tress injection molded plastic 100% matte s n m s l1 [2] h1020 xxxx [1] 4-digit lot number xxxx [2] max peak refow temperature of 260 c HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com p ower d etectors - s m t 11 11 - 10 pin descriptions HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz pin number function description interface s chematic 1, 16, 21, 23 vcc bias s upply. c onnect supply voltage to these pins with appropriate fltering. 2, 5, 6, 8, 11 - 13, 22, 24 package base gnd package bottom has an exposed metal paddle that must be connected to r f/d c ground. 3 ,4 inp, inn r f input pins. 7 e nx disable pin. c onnect to gnd for normal operation. applying voltage v>0.8xvcc will initiate power saving mode.
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com power detectors - s m t 11 11 - 11 pin descriptions (continued) pin number function description interface s chematic 9, 10 co fs a, cof s b input high pass flter capacitor. connect a capacitor between co fs a and co fs b to determine 3 db point of input signal high-pass flter. 14 v set s et input point for controller mode. 15 r m so u t logarithmic output that provides an indication of mean square input power. 17, 18, 19, 20 sc i1, sc i2, sc i3, sc i4 digital input pins that control the internal integration time constant for mean square calculation. sc i4 is the most signifcant bit. set v>0.2xvcc to disable. s hortest integration time is for sc i=0000, allowed longest integration time is for sci=1100 (1101, 1110 and 1111 sci settings are forbidden states). each step changes the integration time by 1 octave. HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com p ower d etectors - s m t 11 11 - 12 evaluation pcb t he circuit board used in the application should use r f circuit design techniques. s ignal lines sho-uld have 50 ohm impedance while the package ground leads and exposed paddle should be connected directly to the ground plane similar to that shown. a sufficient number of via holes should be used to con - nect the top and bottom ground planes. t he evalua - tion circuit board shown is available from hittite upon request. board is confgured with wideband single-ended input interface suitable for input signal frequencies above 100 mhz. r efer to wideband single-ended input inter - face section in application information for operating with signals below 100 mhz. list of materials for evaluation pcb item description j1, j2 s ma c onnector t p1 - t p9 d c pin c 1, c 10, c 16 100 pf c apacitor, 0402 pkg. c 2, c 5, c 11, c 17 100 nf c apacitor, 0402 pkg. c 3, c 4, c 6 1000 pf c apacitor, 0402 pkg. r 2, r 12 - r 15 10k o hm r esistor, 0402 pkg. r 3 - r 5, r 9, r 10 0 o hm r esistor, 0402 pkg. r 6, r 7 4.7k o hm r esistor, 0402 pkg. u1 hm c 1020lp4 e r m s power detector pc b [1] 128683-1 e valuation p c b [1] c ircuit board material: r ogers 4350 or arlon 25f r HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz evaluation order information item c ontent part number e valuation p c b hm c 1020lp4 e e valuation p c b e val01-hm c 1020lp4 e
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com power detectors - s m t 11 11 - 13 application circuit HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com p ower d etectors - s m t 11 11 - 14 HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz t he hm c 1020lp4 e power detector is the optimal solution for monitoring and controlling transmitted and received signal power, measuring the incident r f signal power, and then generating an output signal representing the input power level. t he hm c 1020lp4 e is a monolithic true- r m s detector, which in fact is an analog calculator, designed to measure the actual r m s power of the input signal, independent of the modulated signal waveform complexity or modulation scheme. at the core of an rms detector is a full-wave rectifer, log/antilog circuit, and an integrator. the rms output signal is directly proportional to the logarithm of the time-average of v in 2 . t he bias block also contains temperature compensation circuits which stabilize output accuracy over the entire operating temperature range. t he dc offset cancellation circuit actively cancels internal offsets so that even very small input signal levels can be measured accurately. t he hm c 1020lp4 e achieves exceptional r f power measurement accuracy independent of the modulation of the carrier, with the system architecture shown in the block diagram fgure. the relation between the HMC1020LP4Es r m so u t output and the r f input power is given below: confguration for the typical application t he hm c 1020lp4 e is a logarithmic r m s detector that can be directly driven with a single-ended 50- o hm r f source. t he integrated broadband single-ended input interface of hm c 1020lp4 e eliminates the requirement for an external balun transformer or a matching network. t he hm c 1020lp4 e can be operated from d c to 3.9 ghz by using only standard d c blocking capacitors. t his simple input interface provides cost and p c b area reductions and increases measurement repeatability. the rms output signal is typically connected to vset through a resistive network providing a pin -> rmsout transfer characteristic slope of 35.2 mv/db ( at 900 mhz). however the rms output can be re-scaled to magnify a specifc portion of the input sensing range, and to fully utilize the dynamic range of the rms output. refer to the section under the log-slope and intercept heading for details. application information principle of operation p in = r m so u t / [log-slope] + [log-intercept], dbm
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com power detectors - s m t 11 11 - 15 HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz due to part-to-part variations in log-slope and log-intercept, a system-level calibration is recommended to satisfy absolute accuracy requirements; refer to the system calibration section for more details. broadband single-ended input interface t he hm c 1020lp4 e operates with a single-ended input interface and requires only two external d c blocking capacitors and an external 50 o hm resistor. t he hm c 1020lp4 e input interface shown below provides a compact, broadband solution. note that the provided single-ended input interface covers the whole operating spectrum of the hm c 1020lp4 e and does not require matching/tuning for different frequencies. t he performance of the hm c 1020lp4 e at different frequencies is shown below: rmsout & error vs. pin 0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 -4 -3 -2 -1 0 1 2 3 4 -70 -60 -50 -40 -30 -20 -10 0 10 err 100mhz err 900mhz err 1900mhz err 2200mhz err 2700mhz err 3500mhz err 3900mhz logout 100mhz logout 900mhz logout 1900mhz logout 2200mhz logout 2700mhz logout 3500mhz logout 3900mhz rmsout (v) error (db) input power (dbm)
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com p ower d etectors - s m t 11 11 - 16 rms output interface and transient response the HMC1020LP4E features digital input pins (sci1-sci4) that control the internal integration time constant. output transient response is determined by the digital integration controls, and output load conditions. shortest integration time is for sci=0000, allowed longest integration time is for sci=1100 (1101, 1110 and 1111 sci settings are forbidden states). using larger values of sc i will narrow the operating bandwidth of the integrator, resulting in a longer averaging time interval and a more fltered output signal. it will also slow the power detectors transient response. a larger sc i value favors output accuracy over speed. for the fastest possible transient settling times set sc i to 0000. t his confguration will operate the integrator at its widest possible bandwidth, resulting in short averaging time-interval and an output signal with little fltering. for most applications an sci setting may be selected to maintain a balance between speed and accuracy. furthermore, error performance over modulation bandwidth is dependent on the sc i setting. for example, modulations with relatively low frequency components and high crest factors may require higher sci (integration) settings. table 1: transient response vs. sci setting [1] : rmsout rise-time 10% -> 90% (s) [3] rmsout rise settling time (s) [2] rmsout fall-time 100% -> 10% (s) [4] sc i4,3, 2,1 pin = 0 dbm pin = -20 dbm pin = -40 dbm pin = 0 dbm pin = -20 dbm pin = -40 dbm pin = 0 dbm pin = -20 dbm pin = -40 dbm 0000 0.0686 0.044 0.053 0.509 0.504 0.257 0.969 0.975 1 0010 0.0684 0.05 0.093 0.54 0.524 0.6788 2.98 3.193 3.35 0100 0.076 0.066 0.878 1.956 1.872 2.82 13.5 14.18 14.978 0110 1.624 3.432 4.84 7. 8 8.056 8.92 62.9 65.384 69.224 1000 8.6 15.32 23.4 35.52 37. 28 40.92 294.64 304.52 317. 3 2 1010 38.6 65.8 109.6 165.2 156 188 1379.4 1423.6 147 7.6 110 0 186 325 509 802 770 831 6447 6640 6881 [1] input signal is 1900 mhz cw -tone switched on and off [2] measured from rf switching edge to 1db (input referred) settling of rmsout. [3] measured from 10% to 90% [4] measured from 100% to 10% HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com power detectors - s m t 11 11 - 17 HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz 0.01 0.1 1 10 100 1000 10000 0123456789101112 -40 dbm -20 dbm 0 dbm integration setting (in decimal) rise time (us) rise time [1] vs. sci setting over input power [1] measured from 10% to 90% [2] measured from rf switching edge to 1db (input referred) settling of rmsout. [3] measured from 100% to 10% rise settling time [2] vs. sci setting over input power 0.1 1 10 100 1000 10000 100000 0123456789101112 -40 dbm -20 dbm 0 dbm integration setting (in decimal) rise time (us) 1 10 100 1000 10000 100000 0123456789101112 -40 dbm -20 dbm 0 dbm integration setting (in decimal) fall time (us) fall time [1] vs. sci setting over input power for increased load drive capability, consider a buffer amplifer on the rms output. using an integrating amplifer on the rms output allows for an alternative treatment for faster settling times. an external amplifer optimized for transient settling can also provide additional rms fltering, when operating hm c 1020lp4 e with a lower sc i value. following fgures show how the peak-to-peak ripple decreases with higher sc i settings along with the r f pulse response over different modulations. residual ripple for 900 mhz wimax @ sci=0100 residual ripple for 900 mhz wimax @ sci=0110 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 -100 -80 -60 -40 -20 0 20 40 60 80 100 0 50 100 150 200 250 300 350 400 450 500 sci = 0000 sci = 0100 rmsout (v) rf input voltage (mv) time (us) rf input rmsout 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 -100 -80 -60 -40 -20 0 20 40 60 80 100 0 50 100 150 200 250 300 350 400 450 500 sci = 0000 sci = 0110 rmsout (v) rf input voltage (mv) time (us) rf input rmsout
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com p ower d etectors - s m t 11 11 - 18 HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz residual ripple for 900 mhz wibro @ sci=0100 residual ripple for 900 mhz wibro @ sci=0110 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 -100 -80 -60 -40 -20 0 20 40 60 80 100 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 sci = 0000 sci = 0100 rmsout (v) rf input voltage (mv) time (ms) rf input rmsout 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 -100 -80 -60 -40 -20 0 20 40 60 80 100 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 sci = 0000 sci = 0110 rmsout (v) rf input voltage (mv) time (ms) rf input rmsout residual ripple for 900 mhz lte downlink @ sci=0100 residual ripple for 900 mhz lte downlink @ sci=0110 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 0 0.1 0.2 0.3 0.4 0.5 sci = 0000 sci = 0100 time (ms) rmsout (v) 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 0 0.1 0.2 0.3 0.4 0.5 sci = 0000 sci = 0110 time (ms) rmsout (v) residual ripple for 900 mhz wcdma4 @ sci=0011 residual ripple for 900 mhz wcdma4 @ sci=0100 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 0 50 100 150 200 250 300 350 400 450 sci = 0000 sci = 0011 time (us) rmsout (v) 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 0 50 100 150 200 250 300 350 400 450 sci = 0000 sci = 0100 time (us) rmsout (v)
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com power detectors - s m t 11 11 - 19 HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz log-slope and intercept the HMC1020LP4E provides for an adjustment of output scale with the use of an integrated operational amplifer. logarithmic slope and intercept can be adjusted to magnify a specifc portion of the input sensing range, and to fully utilize the dynamic range of the r m s output. a log-slope of 35.2 mv/db (@1900 mhz) is set by connecting rms output to vset through a resistor network for ?=1 (see application schematic). t he log-slope is adjusted by applying the appropriate resistors on the r m s and v set pins. log-intercept is adjusted by applying a d c voltage to the v set pin. o ptimized slope = ? * log-slope optimized intercept = log_intercept C (r fbk /r set ) * v blin e r fbk r fbk // r shun t // r set ? = 1 2 w hen r fbk =0 to set r m so u t =v set , then ? =1/2 if r set is not populated, then ? = ? * (r fbk / (r fbk // r s hun t )) and intercept is at nominal value. e xample: t he logarithmic slope can be simply increased by choosing appropriate r fbk and r s hun t values while not populating the r set resistor on the evaluation board to keep the intercept at nominal value. s etting r fbk =4.7k and r s hun t = 2.2k results in an optimized slope of: optimized slope = ? * log_slope = 1.57* 36.9mv / db o ptimized s lope = 58 mv / db 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 -70 -60 -50 -40 -30 -20 -10 0 10 high slope nominal input power (dbm) rmsout (v) slope = 58 mv/db rset = open rfbk = 4.7 kohm rshunt = 2.2 kohm slope = 37.3 mv/db rset = open rfbk = 4.7 kohm rshunt = 4.7 kohm slope adjustment
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com p ower d etectors - s m t 11 11 - 20 dc offset compensation loop internal d c offsets, which are input signal dependant, require continuous cancellation. o ffset cancellation is a critical function needed for maintenance of measurement accuracy and sensitivity. t he dc offset cancellation loop performs this function, and its response is largely defned by the capacitance (cofs) connected between cofsa, cofs pins. c o fs capacitor sets the loop bandwidth of the d c offset compensations. higher c o fs values are required for measuring lower r f frequencies. t he optimal loop bandwidth setting will allow internal offsets to be cancelled at a minimally acceptable speed. d c o ffset c ancellation loop bandwidth , hz for example: loop bandwidth for d c cancellation with c o fs = 1nf, bandwidth is ~62 khz 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 -70 -60 -50 -40 -30 -20 -10 0 10 vbline = -3.2 v vbline = -1.6 v vbline = -0.8 v vbline = 0 v vbline = +0.8 v vbline = +1.6 v vbline = +3.2 v input power (dbm) rmsout (v) rset = 24 kohm rfbk = 4.7 kohm rshunt = 2.2 kohm intercept adjustment HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com power detectors - s m t 11 11 - 21 HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz standby mode t he e nx pin can be used to force the power detector into a low-power standby mode. as e nx is deactivated, power is restored to all of the circuits. t here is no memory of previous conditions. c oming out of standby mode, internal integration and co f s capacitors will require recharging, so if large sc i values have been chosen, the wake-up time will be lengthened. modulation performance C crest factor performance t he hm c 1020lp4 e is capable of detecting the average power of r f signals with complex modulation schemes with exceptional accuracy. t he proprietary r m s detection core is optimized to accurately detect the r m s power of the modulated r f signals with very high crest factors. t his crest factor immune detection architecture of hm c 1020lp4 e results in detection accuracy of better than 0.2 db over the entire operating frequency and temperature range. t he response of the hm c 1020lp4 e to a wc dma4 t m test signal is compared with the cw response in the following plots: reading error for wcdma 4 carrier wrt cw response @ +25 c reading error for wcdma 4 carrier wrt cw response @ 2200mhz -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2200mhz 2700mhz 3500mhz 3900mhz input power (dbm) error (db) -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 -70 -60 -50 -40 -30 -20 -10 0 10 +25c +85c -40c input power (dbm) error (db) -1 -0.5 0 0.5 1 3 4 5 6 7 8 9 10 11 12 13 14 900 mhz error from cw (-22 dbm) 1900 mhz error from cw (-22 dbm) 2700 mhz error from cw (-20 dbm) 3900 mhz error from cw (-18 dbm) input signal crest factor (db) rmsout reading error (db) rmsout error vs. crest factor over frequency
for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com p ower d etectors - s m t 11 11 - 22 p in = r m so u t / [log-slope] + [log-intercept], dbm HMC1020LP4E v02.0511 rms power detector single-ended, dc - 3.9 ghz system calibration due to part-to-part variations in log-slope and log-intercept, a system-level calibration is recommended to satisfy absolute accuracy requirements. w hen performing this calibration, two test points near the top end and bottom-end of the desired detection dynamic range should be chosen. it is best to measure the calibration points in the regions (of frequency and amplitude) where accuracy is most important. the log-slope and log-intercept parameters should be derived and then stored in nonvolatile memory. t hese parameters relate the r m so u t output voltage reading of hm c 1020lp4 e to the actual r m s power level as shown below: t he derivation procedure of the log-slope and log-intercept parameters is elaborated below: for example if the following two calibration points were measured at 2.2 ghz: w ith r m so u t = 2.0338v at pin = -10 dbm, and r m so u t = 0.5967v at pin = -50 dbm slope calibration constant = scc scc = = (-50+10)/(0.5967-2.0338) =27.83 db/v intercept calibration constant = i cc icc = pin C scc *rmsout = -10 C 27.83 * 2.0338 = -66.60 dbm now performing a power measurement at -30 dbm: r m so u t measures 1.3089v [measured pin] = [measured r m so u t ]* scc + i cc [measured pin] = 1.3089*27.83 C 66.60 = -30.17 dbm an error of only 0.17 db factory system calibration measurements should be made using an input signal representative of the application. if the power detector is intended to operate over a wide range of frequencies, then a central frequency should be chosen for calibration. layout considerations ? mount rf input coupling capacitors close to the inp and inp pins. ? solder the heat slug on the package underside to a grounded island which can draw heat away from the die with low thermal impedance. t he grounded island should be at r f ground potential. ? connect power detector ground to the rf ground plane, and mount the supply decoupling capacitors close to the supply pins. defnitions ? log-slope: slope of p in C> rmsout transfer characteristic. in units of mv/db ? log-intercept: x-axis intercept of p in C> rmsout transfer characteristic. in units of dbm. ? rms output error: the difference between the measured p in and actual p in using a line of best ft. [measured_p in ] = [measured_ rmsout] / [best-ft-slope] + [best-ft-intercept], dbm ? input dynamic range: the range of average input power for which there is a corresponding rms output voltage with rms output error falling within a specifc error tolerance. ? crest factor: peak power to average power ratio for time-varying signals.

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