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data converters - smt 5 5 - 2 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B general description features functional diagram the HMC660LC4B is a sige monolithic, fully- differential, track-and-hold that provides unprecedented bandwidth and performance to wideband sampled signal systems. the novel design and low aperture jitter enable 9 to 10-bit signal capture from 20 mhz to 4.5 ghz while sampling to 3 gs/s. the narrow sampling aperture allows signal acquisition at frequencies well beyond the input bandwidth. the output can be held for 5 ns, enabling lower-speed adcs to sub sample a high frequency wideband input signal. 4.5 ghz input bandwidth (1 vpp full scale) 3 gs/s maximum sampling rate 61 db sfdr (4 ghz / 0.5 vpp input, clk = 1 gs/s) 55 db sfdr (4 ghz / 1 vpp input, clk = 1 gs/s) ultra-clean ouput waveforms, minimal glitching >60 db hold mode feedthrough rejection 1.05 mv rms hold mode output noise single / dual rank evaluation boards available rohs compliant 4x4 mm smt package typical applications the HMC660LC4B is ideal for: ? rf ate applications ? digital sampling oscilloscopes ? rf demodulation systems ? digital receiver systems ? high speed peak detectors ? software de ned radio ? radar, ecm & elint systems ? high speed dac de-glitching electrical specifications t a = +25c, see test conditions on following page herein. parameter conditions test level min. typ. max. units analog inputs (inp, inn) differential full scale range 1vpp ac coupling low frequency corner 16 mhz input resistance each lead to ground 50 return loss 0 to 5 ghz 12 db dc clock inputs (clkdcp, clkdcn) common mode voltage 22.53 v differential clock high voltage (track mode) 20 40 2000 mv differential clock low voltage (t/h mode) -20 -40 -2000 mv differential input current 10 a common mode input current clkdcp, clkdcn @ 2.5v 6 a ac clock inputs (clkp, clkn) amplitude (sinusoidal input) per input terminal -10 0 10 dbm
data converters - smt 5 5 - 3 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B electrical specifications, (continued) parameter conditions test level min. typ. max. units clock slew rate recommended for best linearity 4 v/ns input impedance 50 return loss 0 - 3 ghz 16 db input resistance 50 analog outputs (outp, outn) differential full scale range 1vpp common mode output voltage 4.0 v output impedance 50 return loss 0 - 4 ghz 15 db track mode dynamics gain 0db track mode bandwidth @ 1 vpp input 3.95 ghz lower frequency corner 16 mhz single tone sfdr @ 500 mhz 1 vpp input 54.8 db single tone sfdr @ 1000 mhz 1 vpp input 54.7 db single tone sfdr @ 2000 mhz 1 vpp input 52.6 db single tone sfdr @ 3000 mhz 1 vpp input 50.4 db single tone sfdr @ 4000 mhz 1 vpp input 49 db two tone sfdr @ 500 mhz 0.5 vpp input 57.4 db two tone sfdr @ 995/1005 mhz 0.5 vpp input per tone 56.4 db two tone sfdr @ 1995/2005 mhz 0.5 vpp input per tone 54.5 db two tone sfdr @ 2995/3005 mhz 0.5 vpp input per tone 52.5 db two tone sfdr @ 3995/4005 mhz 0.5 vpp input per tone 50.2 db noise spectral density @ 1 ghz 8.9 nv/hz integrated noise [2] 0.95 mv rms hold mode dynamics sampling bandwidth @ -3 db gain, 1 vpp input level 4.5 ghz differential droop rate 0.5 %/ns feedthrough rejection 0 - 4000 mhz 60 db integrated noise [2] 500 mhz clock frequency 1.04 mv rms maximum hold time 5ns single tone thd/sfdr 995 mhz [1] -54 / 54 db single tone thd/sfdr 1995 mhz [1] -58 / 58 db single tone thd/sfdr 2995 mhz [1] -59 / 61 db single tone thd/sfdr 3995 mhz [1] -54 / 54 db track-to-hold switching aperture delay -6 ps aperture jitter [1] 84 fs settling time to 1 mv simulated value 206 ps differential pedestal 500 mhz clock frequency, 0 dbm clock power -0.3 % clock frequency 100 3000 mhz clock buffer pipeline delay 38 ps [1] 1 vpp input level, 1 gs/s clock, clock power = 6 dbm / input terminal. [2] noise bandwidth limited by output ampli er bandwidth of ~7 ghz.
data converters - smt 5 5 - 4 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 parameter conditions test level min. typ. max. units hold-to-track switching acquisition time to 1 mv simulated value 205 ps power supply requirements vccsh voltage 4.75 5 5.25 v vccsh current 61 ma vcc1 voltage 4.75 5 5.25 v vcc1 current 50 ma vcc2 voltage 5.7 6 6.3 v vcc2 current 84 ma vccclk voltage 4.75 5 5.25 v vccclk current 20 ma power dissipation 1.16 w electrical specifications, (continued) test levels 1. 100% production tested at t a = +25c 2. guaranteed by design/characterization testing 3. sample tested 4. typical value only HMC660LC4B time domain output waveform -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0 2 10 3 4 10 3 6 10 3 8 10 3 10 10 3 track mode t/h mode differential output voltage (v) time (ps) clock frequency = 500 mhz input frequency = 3.125 ghz sampling transfer function -8 -7 -6 -5 -4 -3 -2 -1 0 100 1000 10000 sampling transfer function ideal 4.5 ghz lowpass magnitude (db) frequency (mhz) dual rank second order sfdr vs. clock slew rate @ 4 ghz input frequency [1] 40 45 50 55 60 0 2 4 6 8 10 12 14 16 18 20 sfdr (db) clock slew rate (v/ns) [1] data is derived from linearity measurements at clock frequencies from 0.5 to 3.0 ghz.
data converters - smt 5 5 - 5 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B hold-mode sfdr vs. frequency & input power [2] hold-mode thd vs. frequency & input power [2] hold-mode thd vs. frequency & input power [1] hold-mode sfdr vs. frequency & input power [1] -85 -75 -65 -55 -45 1000 2000 3000 4000 full scale (1 vpp) half full scale (0.5 vpp) thd (db) frequency (mhz) -85 -75 -65 -55 -45 1000 2000 3000 4000 full scale (1 vpp) half full scale (0.5 vpp) thd (db) frequency (mhz) 45 55 65 75 85 1000 2000 3000 4000 full scale (1 vpp) half full scale (0.5 vpp) sfdr (db) frequency (mhz) 3 rd order 2 nd order 45 55 65 75 85 1000 2000 3000 4000 full scale (1 vpp) half full scale (0.5 vpp) sfdr (db) frequency (mhz) 3 rd order 2 nd order [1] square wave clock: 0.5 gs/s @ 6.3 v/ns slew rate [2] clock power = +6 dbm, clock rate 1 gs/s [3] clock power = 0 dbm, clock rate 2 gs/s -75 -65 -55 -45 -35 2000 3000 4000 full scale (1 vpp) half full scale (0.5 vpp) thd (db) frequency (mhz) 45 55 65 75 85 2000 3000 4000 full scale (1 vpp) half full scale (0.5 vpp) sfdr (db) frequency (mhz) 3 rd order 2 nd order hold-mode sfdr vs. frequency & input power [3] hold-mode thd vs. frequency & input power [3]
data converters - smt 5 5 - 6 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B hold-mode sfdr vs. frequency & clock power @ full scale (1vpp) [1] hold-mode sfdr vs. clock power & clock frequency @ full scale (1vpp) [1] hold-mode sfdr vs. clock power & clock frequency @ full scale (1vpp) [2] hold-mode sfdr vs. frequency & clock power @ full scale (1vpp) [2] hold-mode sfdr vs. clock power & clock frequency @ full scale (1vpp) [3] hold-mode sfdr vs. frequency & clock power @ full scale (1vpp) [3] 35 45 55 65 75 1000 2000 3000 4000 0 dbm +6 dbm +10 dbm sfdr (db) frequency (mhz) clock power 2 nd order 3 rd order 30 40 50 60 70 80 50 60 70 80 90 100 110 0246810 2 nd order sfdr (db) 3 rd order sfdr (db) clock power ( dbm ) 4 ghz 3 ghz 2 ghz 1 ghz 4 ghz 1 ghz 3 ghz 30 40 50 60 70 50 60 70 80 90 100 0246810 2 nd order sfdr (db) 3 rd order sfdr (db) clock power ( dbm ) 4 ghz 3 ghz 2 ghz 4 ghz 3 ghz 2 ghz 40 50 60 70 80 2000 3000 4000 0 dbm +6 dbm +10 dbm sfdr (db) frequency (mhz) clock power 3 rd order 2 nd order 45 55 65 75 85 1000 2000 3000 4000 0 dbm +6 dbm +10 dbm sfdr (db) frequency (mhz) clock power 3 rd order 2 nd order 30 40 50 60 70 80 50 60 70 80 90 100 0246810 2 nd order sfdr (db) 3 rd order sfdr (db) clock power ( dbm ) 4 ghz 3 ghz 2 ghz 1 ghz 4 ghz 1 ghz [1] clock rate 0.5 gs/s [2] clock rate 1 gs/s [3] clock rate 2 gs/s
data converters - smt 5 5 - 7 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B dual rank hold-mode sfdr vs. frequency & input power [2] dual rank hold-mode thd vs. frequency & input power [2] dual rank hold-mode thd vs. frequency & input power [1] dual rank hold-mode sfdr vs. frequency & input power [1] -85 -80 -75 -70 -65 -60 -55 -50 -45 -40 1000 2000 3000 4000 full scale (1 vpp) half full scale (0.5 vpp) thd (db) frequency (mhz) 40 45 50 55 60 65 70 75 80 85 1000 2000 3000 4000 full scale (1 vpp) half full scale (0.5 vpp) sfdr (db) frequency (mhz) 3 rd order 2 nd order -85 -80 -75 -70 -65 -60 -55 -50 -45 -40 1000 2000 3000 4000 full scale (1 vpp) half full scale (0.5 vpp) thd (db) frequency (mhz) 40 45 50 55 60 65 70 75 80 85 1000 2000 3000 4000 full scale (1 vpp) half full scale (0.5 vpp) sfdr (db) frequency (mhz) 3 rd order 2 nd order dual rank hold-mode sfdr vs. frequency & input power [3] dual rank hold-mode thd vs. frequency & input power [3] -75 -65 -55 -45 -35 1000 2000 3000 4000 full scale (1 vpp) half full scale (0.5 vpp) thd (db) frequency (mhz) 35 40 45 50 55 60 65 70 75 80 1000 2000 3000 4000 full scale (1 vpp) half full scale (0.5 vpp) sfdr (db) frequency (mhz) 3 rd order 2 nd order [1] square wave clock: 0.5 gs/s @ 6.3 v/ns slew rate [2] clock power = +6 dbm, clock rate 1 gs/s [3] clock power = 0 dbm, clock rate 2 gs/s
data converters - smt 5 5 - 8 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com track-mode two-tone sfdr vs. frequency [2] track-mode single-tone sfdr vs. frequency [1] 45 55 65 75 85 0 1000 2000 3000 4000 sfdr (db) frequency (mhz) 3 rd order 2 nd order 45 55 65 75 85 0 1000 2000 3000 4000 sfdr (db) frequency (mhz) 3 rd order 2 nd order dual rank track-mode two-tone sfdr vs. frequency [2] dual rank track-mode single-tone sfdr vs. frequency [1] 40 45 50 55 60 65 70 75 80 85 1000 2000 3000 4000 sfdr (db) frequency (mhz) 3 rd order 2 nd order 40 45 50 55 60 65 70 75 80 85 1000 2000 3000 4000 sfdr (db) frequency (mhz) 3 rd order 2 nd order [1] input voltage = 1 vpp [2] 10 mhz tone separation, 0.5 vpp per tone 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B
data converters - smt 5 5 - 9 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 aperture delay: the delay of the exact sample time relative to the time that the hold command is applied to the device. it is the difference between the delay of the clock switching transition to the hold node and the input signal group delay to the hold node. if the input signal group delay to the hold node exceeds the clock delay this quantity can be negative. aperture jitter: the standard deviation of the sample instant in time. acquisition time: the interval between the internal hold-to-track transition and the time at which the hold-node signal is tracking the input signal within a speci ed accuracy. it does not include the pipeline delay of the clock buffer. differential pedestal: an error term in the sample value caused by charge redistribution in the t/h switch during the sampling transition. in general, the pedestal can consist of three components: a xed offset, a component that is linearly related to input signal amplitude, and a component that is nonlinearly related to input signal amplitude. the majority of the pedestal is usually linear. a small nonlinear component can cause sampling nonlinearity. differential droop rate: the slow drift in the differential output voltage of a held sample while the t/h is in hold- mode. it is typically caused by current leakage on the hold capacitors and corresponds to a decay in the held voltage with increasing time. the majority of the voltage droop over a given time is usually linearly related to the held sample voltage and is expressed as a percentage of initial amplitude per unit time. since it is mostly linear, the droop causes little nonlinearity. feedthrough rejection: a measure of the off-state (hold-mode) isolation of the t/hs internal switch. it is de ned as the ratio of the amplitude of the output signal (for a sinusoidal input) feeding through during the hold mode to the amplitude of the output signal during track mode. normalization by the track-mode signal gives the true switch isolation without the effects of the output ampli er bandwidth limiting. full scale range: the voltage range between the minimum and maximum signal levels that can be handled by the t/h while still meeting the speci cations. gain flatness: the deviation in gain over a speci ed input band relative to a speci ed mid-frequency gain. sampling bandwidth: the -3 db bandwidth of the sampled signal levels represented by the held sample amplitudes. it includes both the bandwidth of the transfer function from the signal input to the hold-node and any band-limiting effects associated with the nite time duration of the sampling aperture. settling time: the interval between the internal track-hold transition and the time at which the held output signal is settled to within a speci ed accuracy. it does not include the pipeline delay of the clock buffer. spurious free dynamic range (sfdr): the ratio (usually expressed in db) between the sinusoidal output signal amplitude and the amplitude of the largest non-linearity product falling within one nyquist bandwidth. it may be speci ed for both full scale input and some fraction(s) of full scale input. a sfdr based only on 2 nd order nonlinear products is referred to as the 2 nd order sfdr (sfdr2). a sfdr based only on 3 rd order products is referred to as the 3 rd order sfdr (sfdr3). total harmonic distortion (thd): the ratio of the total power in the non-linearity-generated harmonics and harmonic aliases (measured in one nyquist band) to the output signal power. HMC660LC4B definition of specifications
data converters - smt 5 5 - 10 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com esd: on-chip esd protection networks are incorporated on the terminals, but the rf/microwave compatible interfaces provide minimal protection and esd precautions should be used. power supply sequencing: the recommended power supply startup sequence is vcc2, vcc1, vccsh, vccclk, (clkdcp, clkdcn) if biased from independent supplies. vcc1, vccsh, vccclk can be connected to one +5v supply if desired. input signal drive: for best results, the inputs should be driven differentially. the input circuit has an on-chip resistive bias-t for separating the dc and rf components of the input. the low frequency corner of the rf path is approximately 16 mhz (ccoupling=10 pf, rdc=1.28 k ohm). the input can be driven single-ended but the linearity of the device will be degraded somewhat. clock input: the clock inputs should be driven differentially if possible. the device is in track-mode when (clkp C clkn) is high and it is in hold-mode when (clkp-clkn) is low. the t/h-mode 2nd order linearity of the device varies somewhat with clock slew rate as shown in the performance data plots. because of the slew rate dependence, the 2nd order linearity will vary somewhat with clock power for sinusoidal signals. for optimal linearity, a clock zero-crossing slew rate of roughly 4 v/ns (per clock input) or more is recommended. for sinusoidal clock inputs, this corresponds to a sinusoidal clock power per differential half-circuit input of -3.5 dbm at 3 ghz, 0 dbm at 2 ghz, and 6 dbm at 1 ghz. at clock frequencies lower than 1 ghz, a square wave clock will provide the best 2nd order linearity performance. the clock input circuit has an on-chip resistive bias-t for separating the dc and rf components of the input. the low frequency corner of the rf path is approximately 9 mhz (ccoupling=10 pf, rdc = 1.7 k ohm with clock dc shorted). outputs: the outputs should be sensed differentially for the cleanest output waveforms. the output impedance is 50 resistive returned to the vcc2 supply. if the load is also 50 returned to the vcc2 supply, then the vcc2 supply should be 5v. if the output is capacitively coupled to 50 then the vcc2 supply should be 6v. the bandwidth of the output ampli er (beyond the hold-node) is approximately 7 ghz. this produces approximately a 1 db roll-off at the 3 db bandwidth of the hold node (4.5 ghz) resulting in an overall track-mode 3 db bandwidth of approximately 3.9 ghz. hence, the output amplitude of the sampled waveform may be somewhat larger than the track mode response at high input frequencies due to the effect of the output ampli er bandwidth. the output ampli er noise contribution to the total output noise is substantial. if desired, a signi cant reduction in output noise can be achieved by ltering the output to a lower bandwidth than the output ampli er bandwidth of 7 ghz. this is particularly effective if operating at lower clock rates. for example, the output noise can be reduced by approximately 4 db if the output bandwidth is reduced by a factor of four from 7 ghz down to 1.75 ghz. the output will have very sharp transitions at the clock edges due to the broad output ampli er bandwidth. the user should be aware that any signi cant length of cable between the chip output and the load will cause frequency response roll-off and dispersion that can produce low amplitude tails with relatively long time-constants in the settling of the output waveform into the load. this effect is most noticeable when operating in a lab setting with output cables of a few feet length, even with high quality cable. output cables between the t/h and the load should be of very high quality and 2 ft or less in length. re ections between the load and the device will also degrade the hold mode response. the output cable length can be adjusted to minimize the re ection perturbations to some extent. in general, the round trip transit time of the cable should be an integer number of clock periods to obtain the minimal re ection perturbation in the hold mode portion of the waveform. the optimal performance is obtained when the t/h is within 50 ps or less of the load since this gives a re ection duration equal to the approximate settling time of the device. application notes 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B
data converters - smt 5 5 - 11 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com linearity measurement and calculation 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B when characterizing the linearity of a t/h, the transfer function linearity of the held samples (referred to as t/h-mode linearity) is usually the quantity of most interest to the user. these samples contain the signal information that is ultimately digitized by the downstream a/d converter. since the t/h-mode linearity is often different than the track- mode linearity, this presents a unique measurement issue in that the linearity of only the hold-portion of the analog output waveform must be selectively measured. this issue is aggravated for high speed t/hs because there are few wide-band time domain instruments (oscilloscopes or a/d converters) with suf cient linearity to characterize a high linearity t/h. therefore a frequency domain instrument (spectrum analyzer) and measurement technique are used which allow selective characterization of the hold-mode portion of the waveform a common approach to this requirement has been to cascade two t/hs in a dual rank con guration such that the second t/h (t/h 2) re-samples the output of the rst t/h (t/h 1). the two t/hs are usually clocked 180 degrees out- of-phase in master-slave operation to eliminate the track-mode portion of the output waveform from the rst t/h. this arrangement produces an output waveform that consists of two time segments. the rst segment is the t/h 1 hold- mode output as observed through the t/h 2 track-mode transfer function. the second time segment is the t/h 1 hold- mode output re-sampled and held by the t/h 2 device. this measurement approach is not a perfect representation of the linearity of a single t/h due to the impact of the second t/h on the overall linearity. however, it does eliminate the track-mode portion of the t/h 1 output and permits a spectrum analyzer linearity measurement of the cascaded devices. since t/h 2 only has to sample the held waveform from t/h 1, the linearity impact of t/h 2 is primarily associated with its dc linearity. an often used approximation is that the dc linearity of t/h 2 is much higher than the slew-rate dependent, high frequency linearity of t/h 1 so that the total non-linearity of the cascade is dominated by the high frequency linearity of t/h 1. in this case, the dual rank con guration has a net linearity that closely resembles the linearity of a single t/h, particularly at high frequencies. however, this approximation is not always valid. if not, the dual rank con guration fails to represent the linearity of a single t/h. the HMC660LC4B represents such a case; the 3rd order nonlinearity of this device varies relatively slowly with frequency and is high enough over the t/h bandwidth that the dc linearity of the 2nd t/h signi cantly impacts the overall dual rank con guration. another linearity measurement issue unique to the t/h device is the need for output frequency response correction. in the case of a dual rank t/h, the output waveform resembles a square wave with duration equal to the clock period. mathematically, the output can be viewed as the convolution of an ideal delta-function sample train with a single square pulse of duration equal to one clock period. this weights the output spectral content with a sin(f/fs )/(f/fs) (sinc) function frequency response envelope which has nulls at harmonics of the clock frequency fs and substantial response reduction beyond half the clock frequency. the spectral content of the held samples without the envelope weighting is required for proper measurement of the samples linearity. either the impact of the response envelope must be corrected in the data or a measurement method must be used that heterodynes the relevant nonlinear harmonic products to low frequencies to avoid signi cant envelope response weighting. this latter method is referred to as the beat-frequency technique. the beat-frequency technique is commonly used for high-speed t/h linearity measurements, although the measurement does impose restrictions on the speci c input signal and clock frequencies that can be used. for example, with a clock frequency of 512.5 mhz, a single tone input at 995 mhz beats with the 2nd harmonic of the sampling frequency (through the sampling process) to produce a 1st order beat product at 30 mhz. likewise, the 2nd and 3rd harmonics of the input signal (generated via distortion in the t/h) beat with the 4th and 6th harmonics of the sampling frequency respectively to produce 2nd and 3rd order beat products at 60 mhz and 90 mhz. in this manner, the t/h nonlinearity in the vicinity of 1 ghz can be measured even though the 995 mhz fundamental and the 1.99 ghz and 2.985 ghz nonlinear harmonics are well beyond the 206 mhz bandwidth of the sinc response envelope. the possible input frequency choices are overly limited when the low frequency beat-product technique is used at high clock rates. a related high frequency beat-product measurement utilizing correction for the sinc envelope weighting must be employed to measure linearity over a wide range of input frequencies. hittite uses both low frequency and high frequency beat product methods to measure linearity for a wide range of clock and signal frequencies. our high frequency beat-product measurement avoids excessive envelope correction error by maintaining all beat products within the 4 db bandwidth of the sinc function, where the envelope response is well behaved and easily modeled. hittite has also developed a method for accurately measuring the held-sample linearity of a single t/h using a beat- frequency technique that avoids errors due to nonlinear products associated with the track-mode portion of the
data converters - smt 5 5 - 12 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com typical operating circuit notes: 1. for track mode operation, clkdcp and clkdcn must be driven as shown above. vcm = 2.5v, vdiff = 40mv typical. 2. for track-and-hold mode operation, pin 11 and 12 may be left oating, or v diff can be set to zero. 3. all differential inputs are terminated on-chip with 50 ohms to ground. 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B linearity measurement and calculation (continued) waveform. this single t/h linearity measurement method provides accurate results for clock frequencies up to about 2 ghz. this method is used to characterize and specify the linearity of a single t/h in the data sheet, in addition to the usual dual rank con guration linearity measurements. detailed information on the measurement technique and theory can be found in the application note t/h linearity measurement issues and methods available at www.hittite. com.
data converters - smt 5 5 - 13 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 absolute maximum ratings outline drawing vccsh 5.5 vdc vcc1 5.5 vdc vcc2 6.5 vdc clkp, clkn input power +10 dbm input signal amplitude +10 dbm junction temperature 125 c continuous pdiss (t= 85 c) 1.22 w thermal resistance (junction to package bottom) 32.8 c/w storage temperature -65 to +150 c operating temperature -40 to +85 c notes: 1. package body material: alumina 2. lead and ground paddle plating: 30-80 microinches gold over 50 microinches minimum nickel. 3. dimensions are in inches [millimeters]. 4. lead spacing tolerance is non-cumulative 5. package warp shall not exceed 0.05mm datum -c- 6. all ground leads and ground paddle must be soldered to pcb rf ground. 7. classified as moisture sensitivity level (msl) 1. HMC660LC4B electrostatic sensitive device observe handling precautions
data converters - smt 5 5 - 14 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B pin number function description interface schematic 1, 13, 19, 23, 24 n/c not connected. 2, 5, 14, 17, 20, 22 gnd these pins must be connected to a high quality rf/dc ground. 3inp positive t/h rf input (input bias -t). has on-chip dc 50 termination, nominal max single-ended input level = 0.25v (-2 dbm) for speci ed performance. input ac coupling time constant ~ 10 ns, +10 dbm max. 4inn negative t/h rf input (input bias -t). has on-chip dc 50 termination, nominal max single-ended input level = 0.25v (-2 dbm) for speci ed performance. input ac coupling time constant ~ 10 ns, +10 dbm max. 6vccsh t/h core supply. requires nominal current of 61.5 ma at 5v. a 10 nf x7r dielectric chip capacitor close to the device is recommended. 7 n/c this pin must be left oating. 8vccclk clock buffer power. requires 19.8 ma nominal current at 5v. 9, 10 clkn, clkp negative clk rf input, positive clk rf input (clk input bias -t). has on-chip 50 termination, +10 dbm max. ac coupling time constant ~17 ns. 11, 12 clkdcp, clkdcn positive clkdc input and negative clkdc input (clk input bias-t). a 10 n f x7r dielectric chip capacitor or equivalent should be used here. internal bias -t isolation resistor = 1k. may be oated for t/h operation. if biased use common mode voltage of 2.5 v. apply differential voltage of (clkdcp C clkdcn ) > 20 mv to force device in steady state track mode (in the absence of a clock). a 40 mv differential voltage can be continuously applied that allows the device to be biased in track mode whenever the clock is turned off. pin descriptions
data converters - smt 5 5 - 15 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B pin descriptions (continued) pin number function description interface schematic 15, 16 outp, outn positive t/h rf output, negative t/h rf output. 50 output impedance, nominal dc output voltage = 3.9v. can be returned to vcc2 through 50 ohms or ac coupled. device can be damaged if the output is shorted to ground. 18 vcc2 output buffer 2 output driver power. the supply should be 5v if the output is dc coupled to the vcc2 supply. the supply should be 6v if the output is ac coupled; vcc2 current is 84 ma nominal. a 10 nf x 7r dielectric chip capacitor connected close to the device is recommended 21 vcc1 5v power for output buffers 1 and 2. requires a nominal current of 49.8 ma at 5v. a 10 nf x7r dielectric chip capacitor connected close to the device is recommended.
data converters - smt 5 5 - 16 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B single evaluation pcb the circuit board used in the nal application should use rf circuit design te chniques. signal lines should have 50 ohm impedance while the package ground leads and exposed paddle should be con- nected directly to the ground plane similar to that shown. a suf cient number of via holes should be used to connect the top and bottom ground planes in order to provide good rf grounding to 10 ghz. the evaluation circuit board shown is available from hittite upon request. list of materials for evaluation pcb 113055 [1] item description j1 - j6 johnson sma connector j7 9 pin dc connector c1, c2, c5 - c10 10k pf chip capacitor, 0402 pkg. c3, c4 1 uf & 82 pf, 16 khz to 40 ghz chip capacitor, 0502 pkg. c15 - c22 4.7 uf, case a, tantulum capacitor u1 HMC660LC4B track-and-hold ampli er pcb [2] 113057 single eval board [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350
data converters - smt 5 5 - 17 for price, delivery, and to place orders, please contact 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 circuit for single evaluation pcb 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B
data converters - smt 5 5 - 18 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com characterization set-up for single evaluation pcb (landscape view) 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B
data converters - smt 5 5 - 19 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B item description j1 - j8 johnson sma connector j9 10 pin dc connector c10, c11, c14, c15, c18 - c25 10k pf chip capacitor, 0402 pkg. c12, c13 cap, chip, 0302 pkg. 12k pf and 82 pf 130 khz to 100 ghz c16, c17 1 uf & 82 pf, 16 khz to 40 ghz chip capacitor, 0502 pkg. c28 - c35 4.7 uf, case a, tantulum capacitor, note polarity u1, u2 HMC660LC4B track-and-hold ampli er pcb [2] 114 3 50 eval b oard [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 dual rank evaluation pcb list of materials for evaluation pcb 114352 [1] the circuit board used in the nal application should use rf circuit design te chniques. signal lines should have 50 ohm impedance while the package ground leads and exposed paddle should be con- nected directly to the ground plane similar to that shown. a suf cient number of via holes should be used to connect the top and bottom ground planes in order to provide good rf grounding to 10 ghz. the evaluation circuit board shown is available from hittite upon request.
data converters - smt 5 5 - 20 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B application circuit for dual rank evaluation pcb
data converters - smt 5 5 - 21 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B characterization set-up for dual rank evaluation pcb (landscape view)
data converters - smt 5 5 - 22 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B product application circuits direct conversion receiver track-and-hold amplifier application generic software radio track-and-hold amplifier application "4*$%41 5) 065 065 $-,%$ $-,%$ */ */ $-, $-, )*() 41&&% "%$ 5y $iboofm "4*$%41 *' *' -0 ()[ ()[ 5) 065 065 $-,%$ $-,%$ */ */ $-, $-, "%$ hmc398qs16g vco w/ divide-by-8 ? 14 - 15 ghz ? +6 dbm output power ? low phase noise -75 dbc/hz @ 10 khz HMC660LC4B track-and-hold amplifier ? 0.02 - 4.5 ghz ? -66/67 db single tone thd/sfdr ? 3.0 gs/s max. clock rate ? 0.95 mv rms output noise ? >60 db hold mode feedthrough rejection hmc547lp3 hi-isolation spdt ? dc - 20 ghz ? +18 db insertion loss ? 47 db isolation ? 23 dbm input p1db ? fast switching hmc523lc4 i/q mixer / irm ? 15 - 23.6 ghz rf/lo ? 25 db image rejection ? -8 db conversion gain ? +25 dbm input ip3 ? dc - 3.5 ghz if HMC660LC4B track-and-hold amplifier ? 0.02 - 4.5 ghz ? -66/67 db single tone thd/sfdr ? 3.0 gs/s max. clock rate ? 0.95 mv rms output noise ? >60 db hold mode feedthrough rejection hmc311lp3 hbt gain block ? 14.5 db gain ? 4.5 db noise figure ? +15 dbm p1db hmc460 lna, dc - 20 ghz ? 2.5 db noise figure ? 14 db gain ? +16 dbm p1db
data converters - smt 5 5 - 23 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com 0.02 - 4.5 ghz wideband, 3 gs/s track-and-hold amplifier v00.0506 HMC660LC4B notes:

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