available on tape and reel for pick and place manufacturing. usa/canada: toll free: europe : (315) 432-8909 (800) 544-2414 +44 2392-232392 model XDL20-3-050S rev. a delay line description the xdl20-3-050 is a surface mount delay line that uses a slow wave coupling structure that maximizes t he amount of delay per unit area over other distributed delay structures. the xdl20-3-050 can be used in amplifier linearization applications from 850 ? 2000 mhz. the xdl20-3-050 is ideal for the delay element require d in the main loop of feed forward amplifiers. the xinger? delay lines are a low cost, high quality alternative to the traditional coaxial and filter solu tions presently available. parts have been subjected to rigorous qualification testing and units are 100% tested. available in 6 of 6 tin immersion (x dl20-3-050s) rohs compliant finishes. electrical specifications features: ? production friendly ? consistent delay ? stable over temperature ? surface mountable ? available in tape & reel ? non-lead solder paste compatible ? available in lead- free (as illustrated) or tin-lead ? 100% tested frequency (mhz.) 869-894 amps band 925-960 gsm band 1805-1880 dcs band 1930?1990 pcs band mean delay (ns) 2.88 0.1 5.03 (degrees max) 0.50 1.00 (db p-p) 0.10 0.10 0.15 0.15 return loss (db min) 20 20 20 20 insertion loss (db/ns) 0.45 0.45 0.60 0.60 power handling (watts) 1 1 1 1 jc (c/watts) 2 2 2 2 operating temp. (c) -55 to +85 -55 to +85 -55 to +85 -55 to +85 specification based on performance of unit properly in stalled on microstrip printed circuit boards with 50 nominal impedance. specifications subject to change without notice. mechanical drawing xdl20-3-050* mechanical outline dimensions are in inches [millimeters] .045 .009 [1.13 0.23 ] 1.000 .010 [25.40 0.25 ] 1.000 .010 [25.40 0.25 ] orientation marker denotes pin location 2x .037 .004 [0.94 0.10 ] denotes array number pin 2 pin 1 gnd gnd .848 .004 [21.54 0.10 ] 2x .070 .004 sq [1.78 0.10 ] tolerances are non-cumulative * for rohs compliant version order with s suffix
usa/canada: toll free: europe: (315) 432-8909 (800) 544-2414 +44 2392-232392 available on tape and reel for pick and place manufacturing. model XDL20-3-050S rev. a typical performance: 875 to 2175mhz average delay the average delay is defined as the group delay of the input signal through the delay line. because the xinger delay lines take advantage of a narrow band tuning technique, the aver age delay over the broad band varies. the lot-to-lot variation is reflected in the plus/minus tolerance given in specifications. refer to anaren application note aan-232 fo r further information on xinger delay lines. mounting guidelines: in order for xinger surface mount delay lines to work optimally, there must be 50 transmission lines leading to and from all of the rf ports. also, there must be a very good ground plane under the part with a number of plated thru holes to ensure proper electrical performance. if any of these conditions are not satisfied, insertion loss, average delay and vswr may not meet published specifications. when a surface mount delay line is mounted to a printed circuit board (pcb), the primary concerns are; insuring the rf pads of the device are in contact with the circuit trace of the pcb and the ground plane of neither the component nor the pcb are in contact with the rf signal. an example of how the pcb footprint could look is shown below. in particular designs, the 50 lines need to be adjusted to the unique dielectric coefficients and thicknesses as well as varying pick and place equipment tolerances. return loss -70 -60 -50 -40 -30 -20 -10 0 875 975 1075 1175 1275 1375 1475 1575 1675 1775 1875 1975 2075 2175 frequency [mhz] return loss [db] insertion loss -3.5 -3 -2.5 -2 -1.5 -1 -0.5 0 875 975 1075 1175 1275 1375 1475 1575 1675 1775 1875 1975 2075 2175 frequency [mhz] insertion loss [db] xdl20-3-050* mounting footprint dimensions are in inches [millimeters] to ensure proper electrical and thermal performance there must be a ground plane with 100% solder connection underneath the part .848 [21.54] 4x .037 [0.94] multiple plated thru holes to ground .848 [21.54] 4x .076 sq [1.93] 2x 50 ? transmission line
available on tape and reel for pick and place manufacturing. usa/canada: toll free: europe : (315) 432-8909 (800) 544-2414 +44 2392-232392 model XDL20-3-050S rev. a packaging and ordering information parts are available in both reel and tube. packaging follo ws eia 481-2. parts are oriented in tape and reel as shown below. minimum order quantities are 350 per reel and 23 per tube. orientation marker reel
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