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power detectors - smt 1 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz functional diagram features broadband single-ended rf input rms detector with 1 db detection accuracy up to 3.9 ghz input dynamic range: -60 dbm to +8 dbm 1 db envelope detection accuracy over 30 db input range envelope detection bandwidth > 150mhz digitally programmable integration bandwidth power-down mode 24 lead 4x4mm smt package: 16mm2 envelope tracking power-down mode typical applications the HMC1120LP4E 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 ? envelope tracking ? pa linearization general description the HMC1120LP4E is an rms power detector with an integrated high bandwidth envelope detector. the rms output is a temperature compensated, monoton - ic, linear-in-db representation of real rf signal power, measured over an input sensing range of 70 db. the envelope detector provides an accurate voltage output which is linearly proportional to the amplitude enve - lope of the rf input signal for modulation bandwidths up to 150 mhz. the high bandwidth envelope detec - tion of the HMC1120LP4E makes it ideal for detecting broadband and high crest factor rf signals commonly used in gsm, wcdma, and lte systems. addition - ally, the instantaneous envelope output can be used to create fast, excessive rf power protection, pa linear - ization, and efficiency enhancing envelope-tracking pa implementations. the HMC1120LP4Es rms detector integration band - width is digitally programmable via input pins sci1-4 over a range of more than 4 decades. this allows the user to dynamically set the operation bandwidth and also permits the detection of different types of modula - tions on the same platform. the HMC1120LP4E features an internal op-amp at the rms output stage, which accommodates slope and intercept adjustments and supports a wide range of applications. for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 2 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz table 1. electrical specifcations, t a = +25 c, vcc = 3.3v, s ci 4 = s ci 3 = s ci2 = s ci 1 = 3.3v, unless otherwise noted parameter typ. typ. typ. typ. typ. typ. typ. units input frequency 100 900 1900 2200 2700 3500 3900 mhz dynamic range (1db error) [1] rmsout output 72 72 72 72 72 67 62 db etout output 27 27 27 27 28 27 27 db deviation vs temperature: (over full temperature range -40 c to 85 c). deviation is measured from reference, which is the same lte input at 25 c. db modulation deviation (output deviation from reference, which is measured with cw input at equivalent input signal power) lte 20 mhz at +25 c 0.1 0.1 0.1 0.1 0.1 0.1 0.15 db lte 20 mhz at +85c 0.1 0.1 0.1 0.1 0.1 0.1 0.15 db lte 20 mhz at -40 c 0.1 0.1 0.1 0.1 0.1 0.1 0.2 db rmsout logarithmic slope and intercept [1] logarithmic slope 34.4 34.4 33.9 33.9 34 35.2 37 mv/db logarithmic intercept -71 -71.5 -72.2 -72.2 -71.5 -69 -66 dbm max. input power at 1db error 10 10 10 10 10 7 5 dbm min. input power at 1db error -62 -62 -62 -62 -62 -60 -57 dbm etout linear slope and intercept linear slope 1.3 1.32 1.45 1.52 1.55 1.7 1.72 v/vp linear intercept -725 -710 -635 -615 -605 -550 -550 mv max. input power at 1db error 6 5 5 4 4 3 2 dbm min. input power at 1db error -21 -22 -22 -23 -24 -24 -25 dbm [1] with lte 20mhz rmsout vs. pin with different modulations @ 1900 mhz [1] rmsout error vs. pin with different modulations @ 1900 mhz [1] 0 0.5 1 1.5 2 2.5 3 -70 -60 -50 -40 -30 -20 -10 0 10 ideal cw lte 20mhz rmsout (v) input power (dbm) -4 -3 -2 -1 0 1 2 3 4 -70 -60 -50 -40 -30 -20 -10 0 10 cw lte 20mhz error (db) input power (dbm) [1] data was taken at s ci 4=s ci 3=s ci 2=s ci 1=3.3v. for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 3 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz table 2. electrical specifcations ii , t a = +25 c, vcc = 3.3v, s ci 4 = s ci 3 = s ci2 = s ci 1 = 3.3v, unless otherwise noted parameter conditions min typ. max units single-ended input confguration input network return loss up to 3.9 ghz > 12 db input resistance between inp and inn between pins 3 and 4 100 ? input voltage range ac coupled peak voltage at inp - 1 v rmsout output output voltage range 0.32 to 2.7 v source/sink current compliance rmsout held at vcc/2 +8 / -8 ma output slew rate (rise / fall) sci4=sci3=sci2=sci1=0v, cofs=1nf 10.4 / 3.1 10 6 v/s etout output modulation bandwidth 150 mhz output voltage range 0.95 to 1.65 v source/sink current compliance 8 / -3.9 ma output slew rate (rise / fall) 210 / 242 10 6 v/s peak hold time %1 voltage drop from last peak, no external capacitor is connected 154 s vset input (negative feedback terminal) input voltage range for control applications with nominal slope/intercept settings 0.13 to 2.7 v input resistance 5 m? sci1-4 inputs, en logic input (power down control) input high voltage 0.7xvcc v input low voltage 0.3xvcc v input high current 1 a input low current 1 a input capacitance 0.5 pf power supply supply voltage 3.15 3.3 3.45 v supply current with no input power en = vcc, etdisable = gnd 77 82 90 ma en = vcc, etdisable = vcc 62 ma supply current with 0 dbm 84 87 100 ma standby mode supply current en = gnd, etdisable = vcc 7 9 12 ma for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 4 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz [1] data was taken at s ci 4=s ci 3=s ci 2=s ci 1=3.3v. [2] lte 20mhz input waveform. rmsout & error vs. pin @ 100 mhz [1] [2] rmsout & error vs. pin @ 900 mhz [1] [2] rmsout & error vs. pin @ 1900 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] 0 0.5 1 1.5 2 2.5 3 -3 -2 -1 0 1 2 3 -70 -60 -50 -40 -30 -20 -10 0 10 ideal rmsout +25c rmsout +85c rmsout -40c err +25c err +85c err -40c rmsout (v) error (db) input power (dbm) 0 0.5 1 1.5 2 2.5 3 -3 -2 -1 0 1 2 3 -70 -60 -50 -40 -30 -20 -10 0 10 ideal rmsout +25c rmsout +85c rmsout -40c err +25c err +85c err -40c rmsout (v) error (db) input power (dbm) 0 0.5 1 1.5 2 2.5 3 -3 -2 -1 0 1 2 3 -70 -60 -50 -40 -30 -20 -10 0 10 ideal rmsout +25c rmsout +85c rmsout -40c err +25c err +85c err -40c rmsout (v) error (db) input power (dbm) 0 0.5 1 1.5 2 2.5 3 -3 -2 -1 0 1 2 3 -70 -60 -50 -40 -30 -20 -10 0 10 ideal rmsout +25c rmsout +85c rmsout -40c err +25c err +85c err -40c rmsout (v) error (db) input power (dbm) 0 0.5 1 1.5 2 2.5 3 -3 -2 -1 0 1 2 3 -70 -60 -50 -40 -30 -20 -10 0 10 ideal rmsout +25c rmsout +85c rmsout -40c err +25c err +85c err -40c rmsout (v) error (db) input power (dbm) 0 0.5 1 1.5 2 2.5 3 -3 -2 -1 0 1 2 3 -70 -60 -50 -40 -30 -20 -10 0 10 ideal rmsout +25c rmsout +85c rmsout -40c err +25c err +85c err -40c rmsout (v) error (db) input power (dbm) for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 5 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz rmsout & error vs. pin @ 3900 mhz [1] [2] rmsout i ntercept vs. frequency [1] [2] rmsout slope vs. frequency [1] [2] rmsout vs. pin with lte 20mhz @ +25 c [1] rmsout error vs. pin with lte 20mhz @ +25 c [1] rmsout error vs. pin with lte 20mhz @ +85 c wrt +25 c i deal [1] 0 0.5 1 1.5 2 2.5 3 -3 -2 -1 0 1 2 3 -70 -60 -50 -40 -30 -20 -10 0 10 ideal rmsout +25c rmsout +85c rmsout -40c err +25c err +85c err -40c rmsout (v) error (db) input power (dbm) -80 -78 -76 -74 -72 -70 -68 -66 -64 -62 -60 0 1000 2000 3000 4000 +25c +85c -40c intercept (dbm) frequency (mhz) 30 32 34 36 38 40 0 1000 2000 3000 4000 +25c +85c -40c slope (mv/db) frequency (mhz) 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 rmsout (v) input power (dbm) -3 -2 -1 0 1 2 3 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2200mhz 2700mhz 3500mhz 3900mhz error (db) input power (dbm) -3 -2 -1 0 1 2 3 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2200mhz 2700mhz 3500mhz 3900mhz error (db) input power (dbm) [1] data was taken at s ci 4=s ci 3=s ci 2=s ci 1=3.3v [2] lte 20mhz input waveform for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 6 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz rmsout error vs. pin with lte 20mhz @ -40 c wrt +25 c i deal [1] rmsout vs. pin with cw @ +25 c [1] rmsout error vs. pin with cw @ +25 c [1] rmsout vs. pin w/ cw & lte 20mhz @ 1900 mhz & +25 c [1] reading error for lte 20mhz wrt cw response @ +25 c [1] rmsout vs. pin w/ cw & lte 20mhz @ 1900 mhz & +85 c [1] -3 -2 -1 0 1 2 3 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2200mhz 2700mhz 3500mhz 3900mhz error (db) input power (dbm) 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 rmsout (v) input power (dbm) [1] data was taken at s ci 4=s ci 3=s ci 2=s ci 1=3.3v -3 -2 -1 0 1 2 3 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2200mhz 2700mhz 3500mhz 3900mhz error (db) input power (dbm) 0 0.5 1 1.5 2 2.5 3 -70 -60 -50 -40 -30 -20 -10 0 10 cw lte rmsout (v) input power (dbm) -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 error (db) input power (dbm) 0 0.5 1 1.5 2 2.5 3 -70 -60 -50 -40 -30 -20 -10 0 10 cw lte rmsout (v) input power (dbm) for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 7 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz reading error for lte 20mhz wrt cw response @ +85 c [1] rmsout vs. pin w/ cw & lte 20mhz @ 1900 mhz & -40 c [1] reading error for lte 20mhz wrt cw response @ -40 c [1] rmsout output response with sc i = 0000 @ 1900 mhz [2] rmsout output response with sc i = 1100 @ 1900 mhz [2] typical supply current vs. pin, vcc = 3.3v -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 error (db) input power (dbm) 0 0.5 1 1.5 2 2.5 3 -70 -60 -50 -40 -30 -20 -10 0 10 cw lte rmsout (v) input power (dbm) -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 error (db) input power (dbm) [1] data was taken at s ci 4=s ci 3=s ci 2=s ci 1=3.3v [2] cw input waveform 55 60 65 70 75 80 85 90 95 100 105 -70 -60 -50 -40 -30 -20 -10 0 10 +25c +85c -40c supply current (ma) input power (dbm) 0 0.5 1 1.5 2 2.5 3 -5 0 5 10 15 20 25 - 20246 rmsout -20 dbm rmsout 0 dbm rf enable rmsout (v) rf enable voltage (v) time (us) 0 0.5 1 1.5 2 2.5 3 -5 0 5 10 15 20 25 - 20246 rmsout -20 dbm rmsout 0 dbm rf enable rmsout (v) rf enable voltage (v) time (ms) for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 8 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz -30 -25 -20 -15 -10 -5 0 0123456 input return loss (db) frequency (ghz) i nput return loss vs. frequency output ripple & rise/fall time vs. i ntegration setting [sci4, sci3, sci2, sci1] in decimal etout vs. vin with cw @ 900 mhz etout & etout error vs. pin with cw @ 900 mhz etout vs. vin with cw @ 1900 mhz etout & etout error vs. pin with cw @ 1900 mhz 0.8 1 1.2 1.4 1.6 1.8 0 0.1 0.2 0.3 0.4 0.5 +25c +85c -40c etout (v) input voltage (v p ) 0.001 0.01 0.1 1 10 -2 -1 0 1 2 -30 -25 -20 -15 -10 -5 0 5 10 +25c +85c -40c err +25c err +85c err -40c normalized etout (v) error (db) input power (dbm) 0.8 1 1.2 1.4 1.6 1.8 0 0.1 0.2 0.3 0.4 0.5 +25c +85c -40c etout (v) input voltage (v p ) 0.001 0.01 0.1 1 10 -2 -1 0 1 2 -30 -25 -20 -15 -10 -5 0 5 10 +25c +85c -40c err +25c err +85c err -40c normalized etout (v) error (db) input power (dbm) 0 125 250 375 500 625 750 0.1 1 10 100 1000 10 4 10 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ripple with wcdma4 ripple with 8 tone (100khz seperation) rise time fall time output ripple peak-peak (mv) rise time & fall time (us) integration setting (in decimal) for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 9 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz etout vs. pin with cw @ 2200 mhz etout & etout error vs. pin with cw @ 2200 mhz etout vs. pin with cw @ 2700 mhz etout & etout error vs. pin with cw @ 2700 mhz etout vs. pin with cw @ 3500 mhz etout & etout error vs. pin with cw @ 3500 mhz 0.8 1 1.2 1.4 1.6 1.8 0 0.1 0.2 0.3 0.4 0.5 +25c +85c -40c etout (v) input voltage (v p ) 0.001 0.01 0.1 1 10 -2 -1 0 1 2 -30 -25 -20 -15 -10 -5 0 5 10 +25c +85c -40c err +25c err +85c err -40c normalized etout (v) error (db) input power (dbm) 0.8 1 1.2 1.4 1.6 1.8 0 0.1 0.2 0.3 0.4 0.5 +25c +85c -40c etout (v) input voltage (v p ) 0.001 0.01 0.1 1 10 -2 -1 0 1 2 -30 -25 -20 -15 -10 -5 0 5 10 +25c +85c -40c err +25c err +85c err -40c normalized etout (v) error (db) input power (dbm) 0.8 1 1.2 1.4 1.6 1.8 0 0.1 0.2 0.3 0.4 0.5 +25c +85c -40c etout (v) input voltage (v p ) 0.001 0.01 0.1 1 10 -2 -1 0 1 2 -30 -25 -20 -15 -10 -5 0 5 10 +25c +85c -40c err +25c err +85c err -40c normalized etout (v) error (db) input power (dbm) for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 10 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz etout i ntercept vs. frequency with cw etout slope vs. frequency with cw -850 -800 -750 -700 -650 -600 -550 -500 -450 0 1000 2000 3000 4000 +25c +85c -40c intercept (mv p ) frequency (mhz) 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 0 1000 2000 3000 4000 +25c +85c -40c slope (v/v p ) frequency (mhz) etout vs. pin with cw @ 3900 mhz etout & etout error vs. pin with cw @ 3900 mhz 0.001 0.01 0.1 1 10 -2 -1 0 1 2 -30 -25 -20 -15 -10 -5 0 5 10 +25c +85c -40c err +25c err +85c err -40c normalized etout (v) error (db) input power (dbm) 0.8 1 1.2 1.4 1.6 1.8 0 0.1 0.2 0.3 0.4 0.5 +25c +85c -40c etout (v) input voltage (v p ) for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 11 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz outline drawing package i nformation part number package body material lead finish msl rating [2] package marking [1] h m c1120 lp4e rohs-compliant low stress injection molded plastic 100% matte sn msl1 h1120 xxxx [1] 4-digit lot number xxxx [2] max peak refow temperature of 260 c absolute maximum ratings power supply voltage (v cc ) 3.8v rf input power 13 dbm input voltage vcc + 0.6v junction temperature 125 c thermal resistance (r th ) (junction to ground paddle) 23.82 c/w storage temperature -65 to +150 c operating temperature -40 to +85 c esd sensitivity (hbm) class 1b notes: 1. package body material: low stress injection molded plastic silica and silicon impregnated. 2. lead and ground paddle material: copper alloy. 3. lead and ground paddle plating: 100% matte tin 4. dimensions are in inches [millimeters]. 5. lead spacing tolerance is non-cumulative. 6. characters to be helvetica medium, .025 high, white ink, or laser mark located approx. as shown. 7. pad burr length shall be 0.15mm max. pad burr height shall be 0.05mm max. 8. package warp shall not exceed 0.05mm 9. all ground leads and ground paddle must be soldered to pcb rf ground. 10. refer to hittite application note for suggested pcb land pattern. electrostatic sensitive device observe handling precautions for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 12 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz pin descriptions pin number function description pin schematic 1, 20-21, 23 vcc bias supply. connect supply voltage to these pins with appropriate fltering. 2, 22 gnd package bottom has an exposed metal paddle that must be connected to rf/dc ground. 3 inp rf input pins 4 inn 5 mid dc bias pin of input circuitry. connect a larger capacitor to operate in lower frequencies. 6 ph_cap peak/hold capacitor pin. connect a larger capacitor from ph_cap to gnd for longer droop rate. 7 etout linear output that provides an indication of envelope of the input signal. can be operated in two operation modes (controlled by mode_sel pin). instantaneous envelope track and peak_hold. for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 13 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz pin descriptions pin number function description pin schematic 8 mode_sel operation mode selection pin for etout. gnd sets et mode, vcc sets peak/hold mode. toggle this pin to reset the peak/hold capacitor. 9 cofsa input high pass flter capacitor. connect a capacitor between cofsa and cofsb to determine 3 db point of input signal high-pass flter. 10 cofsb 11-12 rsv reserved for internal use. should be left foating. 13 etdisable envelope tracking disable pin. apply voltage v > 0.8xvcc to disable etout. 14 vset set input point for controller mode. 15 rmsout logarithmic output that provides an indication of mean square input power. 16 sci1 digital input pins that control the internal integration time constant for mean square calculation. sci4 is the most signifcant bit. set v < 0.2xvcc to disable. shortest integration time is for sci=0000. each step changes the integration time by 1 octave. 17 sci2 18 sci3 19 sci4 24 en enable pin. connect to vcc for normal operation. apply voltage v < 0.2xvcc to disable whole chip. for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 14 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz the circuit board used in the application should use rf circuit design techniques. signal lines should 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. the evaluation 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. refer to wide - band single-ended input interface section in application information for operating with sig - nals below 100 mhz. evaluation pcb evaluation order i nformation item contents part number evaluation pcb only HMC1120LP4E evaluation pcb e v1h m c1120 lp4 [1] [1] reference this number when ordering evaluation pcb only list of materials for evaluation pcb item description j1-j3 sma connector tp2-tp9, tp11, tp14 dc pin c1, c16, c20 100 pf capacitor, 0402 pkg. c2, c5, c17, c21 100 nf capacitor, 0402 pkg. c3-c4, c6 1 nf capacitor, 0402 pkg. c18 10 nf capacitor, 0402 pkg. r1, r3, r5, r18,r23-r24, r29-r31, r33, r40, r48 0 ohm resistor, 0402 pkg. r6-r7 4.7k ohm resistor, 0402 pkg. r10 49.9 ohm resistor, 0402 pkg. r41 604 ohm resistor, 0402 pkg. u1 h m c1120 lp4e rms power detector & envelope detector pcb [2] 600-00932-00 evaluation pcb [1] circuit board material: rogers 4350 or arlon 25fr for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 15 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz application circuit for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 16 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz 1.0 application i nformation 1.1 principle of operation the HMC1120LP4E combines an rms detector core with an envelope detector in a single package which is capable of extracting envelope information of the modulated rf signal with modulation bandwidths in excess of 150 mhz. the extracted envelope information is independent of the average power and the crest factor of the rf signal. the rms detector core provides a linear-in-db output of the average rf power, whereas the envelope detector core provides a linear representation of the instantaneous envelope waveform. the instantaneous envelope output etout may be used in ultra-fast excessive rf power protection systems, pa linearization techniques and in efficiency enhancing envelope-tracking pa implementations. the HMC1120LP4Es rms detector core is designed to measure the actual rms power of the input signal, independent of the modulated signal waveform complexity or modulation scheme. the rms detector core architecture of HMC1120LP4E is composed of a full-wave rectifer, log/antilog circuit, and an integrator as shown above. the rmsout signal is directly proportional to the logarithm of the time-average of v in 2 . the bias block also contains temperature compensation circuits which stabilize output accuracy over the entire operating temperature range. the dc offset cancellation circuit actively cancels internal offsets so that even very small input signal levels can be measured accurately. the HMC1120LP4E achieves exceptional rf power measurement accuracy independent of the modulation of the carrier with the system architecture shown in the block diagram fgure. the relation between the HMC1120LP4Es rmsout output and the rf input power is given below: p in = rmsout / [log-slope] + [log-intercept], dbm for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 17 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz 1.2 confguration for the typical application the HMC1120LP4E is a logarithmic rms detector that can be directly driven with a single-ended 50-ohm rf source. the integrated broadband single-ended input interface of HMC1120LP4E eliminates the requirement for an external balun transformer or matching network. the HMC1120LP4E can be operated from dc to 3.9 ghz by using only standard dc blocking capacitors. this simple input interface provides cost and pcb 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 mv/dbm ( 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 section for details. 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. 1.3 broadband single-ended i nput i nterface the HMC1120LP4E operates with a single-ended input inter-face and requires only two external dc blocking capacitors and an external 50ohm resistor. the HMC1120LP4E input interface shown below provides a compact, broadband solution. note that the provided single-ended input interface covers the whole operating spectrum of the HMC1120LP4Eand does not require matching/tuning for different frequencies. the performance of the HMC1120LP4E at different frequencies is shown below: figure 1. rmsout & error vs. pin 0 0.5 1 1.5 2 2.5 3 -3 -2 -1 0 1 2 3 -70 -60 -50 -40 -30 -20 -10 0 10 100mhz 900mhz 1900mhz 2200mhz 2700mhz 3500mhz 3900mhz rmsout (v) error (db) input power (dbm) for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 18 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz 1.4 envelope detector output the HMC1120LP4Es etout output provides a linearly scaled replica of the instantaneous envelope of the modulated rf signal for modulation bandwidths up to 150 mhz. for optimum performance, the etout pin of the HMC1120LP4E should be terminated with a 604 ? load resistor to gnd. note that any capacitive loading on the etout pin would reduce the modulation bandwidth of the envelope detection. the envelope output has a conversion gain of 1.35v/v with an output voltage ranging from 1.2v to 2.2v. figure 2. etout bandwidth the waveform below shows the HMC1120LP4Es envelope detector response to an rf input signal with a 120 mhz modulation bandwidth. figure 3. etout response to an rf input signal with a 120 mhz modulation bandwidth -3 -2.5 -2 -1.5 -1 -0.5 0 0.5 0 50 100 150 200 250 300 no cap 1.5 pf normalized vet (v/v) modulation bandwidth (mhz) for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 19 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz 1.5 rms output i nterface and transient response the HMC1120LP4E 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. the shortest integration time is for sci=0000 and the longest integration time is for sci=1111. using larger values of sci 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 sci value favors output accuracy over speed. for the fastest possible transient settling times set sci to 0000. this 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 sci setting. for example modulations with relatively low frequency components and high crest factors may require higher sci (integration) settings. table 3. transient response vs. sci setting [1] rmsout rise-time 10% -> 90% (s) [3] rmsout rise settling time (s) [2] rmsout fall-time 90% -> 10% (s) [4] sci4,3, 2,1 pin = 0 dbm pin = -20 dbm pin = 0 dbm pin = -20 dbm pin = 0 dbm pin = -20 dbm 0000 0.162 0.112 1.09984 1.410667 1.53 0.374 0010 0.162 0.119 1.14709 6 1.479386 2.17 0.999 0100 0.164 0.323 2.624 5.491 3.92 0.953 0110 0.848 1.38 32.224 25.71818 11.3 3 3.32 1000 2.65 1.207 67.12 3 0 6 22.933 42.57 12.71 1010 16.4 17. 8 2 628 256.0615 161.01 48.60 110 0 9.74 65.22 2951.22 1773.44 616.15 187.15 [1] input signal is 1900 mhz cw -tone switched on and off [2] measured from 10% to 90% [3] measured from rf switching edge to 1db (input referred) settling of rmsout. [4] measured from 90% to 10% for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 20 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz 0.01 0.1 1 10 100 1000 10 4 012345678910111213141516 -20 dbm 0 dbm rise time (us) integration setting (in decimal) 0.1 1 10 100 1000 10 4 10 5 012345678910111213141516 0 dbm -20 dbm rise time (us) integration setting (in decimal) figure 4. rise time [2] vs. sci setting over input power figure 5. rise settling time [3] 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 HMC1120LP4E with a lower sci value. following fgures show how the peak-to-peak ripple decreases with higher sci settings along with the rf pulse response over different modulations. 0.01 0.1 1 10 100 1000 10 4 012345678910111213141516 -20 dbm 0 dbm fall time (us) integration setting (in decimal) figure 6. fall time [4] vs. sci setting over input power 0 0.5 1 1.5 2 2.5 3 -500 -375 -250 -125 0 125 250 375 500 625 750 875 1000 012345678910 sci = 1100 rf input rmsout (v) rf input voltage (mv) time (ms) 0 0.5 1 1.5 2 2.5 3 -500 -375 -250 -125 0 125 250 375 500 625 750 875 1000 0 5 10 15 20 25 30 35 40 45 sci = 1111 rf input rmsout (v) rf input voltage (mv) time (ms) figure 7. residual ripple for 1900 mhz wcdma4c @ sci=1100 figure 8. residual ripple for 1900 mhz wcdma4c @ sci=1111 [1] input signal is 1900 mhz cw -tone switched on and off [2] measured from 10% to 90% [3] measured from rf switching edge to 1db (input referred) settling of rmsout. [4] measured from 90% to 10% for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 21 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz 0 0.5 1 1.5 2 2.5 3 -500 -375 -250 -125 0 125 250 375 500 625 750 875 1000 0 5 10 15 20 25 30 35 40 45 sci = 1100 rf input rmsout (v) rf input voltage (mv) time (ms) 0 0.5 1 1.5 2 2.5 3 -500 -375 -250 -125 0 125 250 375 500 625 750 875 1000 0 5 10 15 20 25 30 35 40 45 sci = 1111 rf input rmsout (v) rf input voltage (mv) time (ms) figure 9. residual ripple for 1900 mhz lte @ sci=1100 figure 10. residual ripple for 1900 mhz lte @ sci=1111 0 0.5 1 1.5 2 2.5 3 -500 -375 -250 -125 0 125 250 375 500 625 750 875 1000 0 5 10 15 20 25 30 35 40 45 sci = 0011 rf input rmsout (v) rf input voltage (mv) time (ms) 0 0.5 1 1.5 2 2.5 3 -500 -375 -250 -125 0 125 250 375 500 625 750 875 1000 0 5 10 15 20 25 30 35 40 45 sci = 1100 rf input rmsout (v) rf input voltage (mv) time (ms) figure 11. residual ripple for 1900 mhz gsm6c @ sci=0011 figure 12. residual ripple for 1900 mhz gsm6c @ sci=1100 0 0.5 1 1.5 2 2.5 3 -500 -375 -250 -125 0 125 250 375 500 625 750 875 1000 0 5 10 15 20 25 30 35 40 45 sci = 0011 rf input rmsout (v) rf input voltage (mv) time (ms) figure 13. residual ripple for 1900 mhz lte @ sci=1111 for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 22 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz 1.6 log-slope and i ntercept the HMC1120LP4E provides for an adjustment of output scale with the use of an integrated operational amplifer. log-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 rms output. a log-slope of 33.4 mv/db (@1900 mhz) is set by connecting rms output to vset through a resistor network for ?=1 (see application schematic). the log-slope is adjusted by applying the appropriate resistors on the rms and vset pins. log-intercept is adjusted by applying a dc voltage to the vset pin. optimized slope = ? * log-slope optimized intercept = log_intercept C (r fbk /r set ) * v bline r fbk r fbk // r shunt // r set ? = 1 2 when r fbk =0 to set rmsout=v set , then ? =1/2 if r set is not populated, then ? = ? * (r fbk / (r fbk // r shunt )) and intercept is at nominal value. example: the logarithmic slope can be simply increased by choosing appropriate r fbk and r shunt values while not populating the r set resistor on the evaluation board to keep the intercept at nominal value. setting r fbk =4.7k and r shunt = 12k results in an optimized slope of: optimized slope = ? * log_slope = 1.39* 33.4mv / db optimized slope = 46.6 mv / db 0 0.5 1 1.5 2 2.5 3 -70 -60 -50 -40 -30 -20 -10 0 10 rshunt 12kohm rshunt 6.8kohm rshunt 4.7kohm rmsout (v) input power (dbm) 0 0.5 1 1.5 2 2.5 3 3.5 -70 -60 -50 -40 -30 -20 -10 0 10 vbline = -1.5 v vbline = -1.0 v vbline = -0.5 v vbline = 0 v vbline = +0.5 v vbline = +1.0 v vbline = +1.5 v rmsout (v) input power (dbm) figure 14. slope adjustment figure 15. intercept adjustment for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 23 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz 1.7 dc offset compensation loop internal dc offsets, which are input signal dependent, require continuous cancellation. offset cancellation is a critical function needed for maintenance of measurement accuracy and sensitivity. the dc offset cancellation loop performs this function, and its response is largely defned by the capacitance (cofs) connected between cofsa & cofsb pins. cofs capacitor sets the loop bandwidth of the dc offset compensations. higher cofs values are required for measuring lower rf frequencies. the optimal loop bandwidth setting will allow internal offsets to be cancelled at a minimally acceptable speed. 1.8 standby mode the en pin can be used to force the power detector into a low-power standby mode. as en is activated, power is restored to all of the circuits. there is no memory of previous conditions. coming out of stand by mode, internal integration and cofs capacitors will require recharging, so if large sci values have been chosen, the wake-up time will be lengthened. 1.9 envelope disable mode the etdisable pin can be used to force the envelope tracking module into a low power standby mode. as etdisable is deactivated power is restored to the envelope tracking module. there is no memory of previous conditions. coming out of stand by mode, peak/hold capacitors will require recharging. the state of the etdisable pin doesnt affect rms performance. 1.10 modulation performance C crest factor performance the HMC1120LP4E is able to detect the average power of rf signals with complex modulation schemes with exceptional accuracy. the proprietary rms detection core is optimized to accurately detect the rms power of the modulated rf signals with very high crest factors. this crest factor immune detection architecture of HMC1120LP4E results in detection accuracy of better than 0.2 db over the entire operating frequency and temperature range, compared with the cw response under actual wcdma4tm test signals shown below: table 4. loop bandwidth for dc cancellation cap value (nf) bandwidth unit 0.1 1000 khz 1 220 khz 10 35 khz 100 20 khz for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 24 HMC1120LP4E v00.0814 rms power detector & envelope tracker, 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 error (db) input power (dbm) -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 error (db) input power (dbm) figure 16. reading error for lte wrt cw response @ +25 c figure 17. reading error for lte wrt cw response @ 2200 mhz -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 3 4 5 6 7 8 9 10 11 12 13 14 1900 mhz error from cw (-32 dbm) 2700 mhz error from cw (-32 dbm) 3500 mhz error from cw -32 dbm rmsout reading error (db) input signal crest factor (db) figure 18. rmsout error vs. crest factor over frequency 1.11 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. when 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. these parameters relate the rmsout output voltage reading of HMC1120LP4E to the actual rms power level as shown below: p in = rmsout / [log-slope] + [log-intercept], dbm the 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: with rmsout = 2.0816v at pin = -10 dbm, for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 25 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz and rmsout = 0.5673v at pin = -50 dbm slope calibration constant = scc scc = (-50+10)/(0.5673-2.0816) = 26.41 db/v intercept calibration constant = icc icc = pin C scc *rmsout = -10 C 26.41 * 2.0816 = -64.98 dbm now performing a power measurement at -30 dbm: rmsout measures 1.3283v [measured pin] = [measured rmsout]*scc + icc [measured pin] = 1.3283*26.41 C 64.98 = -29.89 dbm an error of only 0.11 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. 1.12 peak hold time peak hold time is defned as 1 percent voltage drop from the last peak. the capacitor value at the ph_cap pin can be used to adjust the droop rate of the peak hold output. increasing the capacitor value increases the droop rate, at the cost of modulation bandwidth. below table represents droop rate performance with different capacitor values. table 5. peak hold time vs. cap values cap value droop rate unit no cap 154 us 3.3 pf 253 us 10 pf 424 us input power is -2 dbm @ 1900 mhz for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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 - smt 26 HMC1120LP4E v00.0814 rms power detector & envelope tracker, dc - 3.9 ghz figure 19. rmsout, envelope tracking, peak hold performance with lte signal @ 1900 mhz 1.13 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. the grounded island should be at rf ground potential. ? connect power detector ground to the rf ground plane, and mount the supply decoupling capacitors close to the supply pins. 1.14 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. for price, delivery and to place orders: hittite microwave corporation, 2 elizabeth drive, 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

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