EQCD High Speed Characterization Summary PRODUCT DESCRIPTION: A length of coaxial ribbon cable is terminated to a transition PCB break-out region onto which respective connectors are soldered. Three such connector systems were tested for the QStrip connectors, 0.8 mm pitch (QSE &QTE): 1. to 2. to 3. to Two PCB variations for each of the three connector styles are summarized: A. Non-crossover PCB break-out Outer rows of the connectors on both ends are connected via the transition PCB. B. PCB break-out (designated with an X ) Outer row on one end of the connector assembly is connected to the inner row on the opposite end connector via the transition PCB. * to ** to to EQCD-020-06.00-STR-TTL-1 EQCD-020-06.00-SEU-TEU-1 EQCD-020-06.00-STR-TEU-1 EQCD-020-19.68-STR-TTL-1 EQCD-020-19.68-SEU-TEU-1 EQCD-020-19.68-STR-TEU-1 EQCD-020-39.37-STR-TTL-1 EQCD-020-39.37-SEU-TEU-1 EQCD-020-39.37-STR-TEU-1 EQCD-020-06.00-STR-TTL-2 *** EQCD-020-06.00-SEU-TEU-2 EQCD-020-06.00-STR-TEU-2 EQCD-020-19.68-STR-TTL-2 EQCD-020-19.68-SEU-TEU-2 EQCD-020-19.68-STR-TEU-2 EQCD-020-39.37-STR-TTL-2 EQCD-020-39.37-SEU-TEU-2 EQCD-020-39.37-STR-TEU-2 * is Dual Vertical ** is Edgemount *** -2 denotes the crossover PCB configuration, X (referenced in charts as X or X) All Rights Reserved 1 / 10
Index Impedance Mismatch... 3 Impedance Mismatch Continued... 4, 5 Insertion Loss... 6 Introduction... 3 Near End and Far End Crosstalk... 10 Product Description... 1 Return Loss... 7 Skew... 8 Voltage Drop... 9 All Rights Reserved 2 / 10
Introduction: The following is an abbreviated summary of the 0.8mm pitch high speed mini-ribbon-coax cable series known as EQCD. Detailed reports for each configuration are available on the web site: http://www.samtec.com/signal_integrity/technical_specifications/electrical.asp?series=eqcd&stack=5&menu=mai n Impedance Mismatch: Average data is presented: Connector End Option, PCB Trace, PCB Break-Out and Cable. The following pictures describe regions of interest. All Rights Reserved 3 / 10
Impedance Mismatch Continued: Product Type, Length to Non- Average Impedance Measurements at 100ps risetime using 38 AWG 50 ohm Coax. Impedance End Option Board PCB Break-Out Cable Z Z Z ) Z ) Z Z 6.00 (152) 48.1 53.3 48.0 55.1 53.6 53.6 56.1 55.6 49.8 49.7 19.68 (500) 48.4 54.3 48.3 55.4 53.4 53.6 56.2 55.7 49.7 49.6 39.37 (1000) 48.2 54.9 48.0 55.9 53.4 53.6 56.3 56.0 49.7 49.7 to with 6.00 (152) 48.2 52.9 48.0 55.3 51.4 53.3 55.1 56.4 49.8 49.7 19.68 (500) 48.2 52.9 47.9 55.2 51.5 53.5 54.9 55.9 49.8 49.6 39.37 (1000) 48.4 53.1 48.2 55.6 51.5 53.9 54.9 56.1 49.8 49.6 End Option Board PCB Break-Out Cable Product Type, Length to Non- Z Z Z Z Z Z 6.00 (152) 50.0 56.6 50.0 57.1 56.5 56.9 57.5 59.2 50.5 50.7 19.68 (500) 50.0 56.7 50.0 -- 56.1 -- 59.0 61.2 50.5 50.8 39.37 (1000) 50.0 55.9 50.0 -- -- -- 59.6 61.1 50.9 50.8 to with 6.00 (152) 50.0 56.8 50.0 -- 55.7 -- 59.3 59.3 51.6 50.8 19.68 (500) 50.0 56.5 50.0 -- 55.5 -- 59.0 59.3 51.6 50.7 39.37 (1000) 50.0 56.5 50.0 -- 55.3 58.9 59.9 60.8 50.8 50.9 End Option Board PCB Break-Out Cable Product Type, Length to Non- Z Z Z Z Z Z 6.00 (152) 50.0 56.6 47.2 53.9 55.4 52.0 57.6 55.1 50.5 49.4 19.68 (500) 50.0 56.8 47.2 54.1 55.6 52.6 57.6 55.7 50.7 49.7 39.37 (1000) 50.0 56.6 47.3 54.1 55.5 52.3 57.4 55.4 50.6 49.6 to with 6.00 (152) 50.0 56.4 47.2 54.3 55.5 52.7 59.0 55.5 51.6 49.6 19.68 (500) 50.0 56.6 47.2 54.6 55.5 53.0 59.1 56.1 51.5 49.9 39.37 (1000) 50.0 56.7 47.2 54.5 55.7 52.7 59.2 55.5 51.3 49.4 All Rights Reserved 4 / 10
Impedance Mismatch Continued: Impedance Measurements at 250ps risetime using 38 AWG 50 ohm Coax. Impedance End Option Product Type, Length (In) to Non- Cable Z Z 6.00 (152) 50.0 56.3 50.0 56.8 50.6 50.3 19.68 (500) 50.0 57.0 50.0 58.4 50.6 50.8 39.37 (1000) 50.0 57.3 50.0 58.4 50.5 50.8 to with 6.00 (152) 50.0 57.4 50.0 57.3 51.8 50.8 19.68 (500) 50.0 57.3 50.0 57.3 51.9 50.7 39.37 (1000) 50.0 56.9 50.0 58.3 50.9 50.9 End Option Cable Product Type, Length (In) to Non- Z Z 6.00 (152) 50.0 56.4 48.0 53.3 50.7 49.8 19.68 (500) 50.0 56.4 48.5 54.0 50.8 49.7 39.37 (1000) 50.0 56.3 48.1 53.6 50.7 49.6 to with 6.00 (152) 50.0 57.2 48.1 53.8 51.8 50.1 19.68 (500) 50.0 57.3 48.1 54.0 51.8 49.8 39.37 (1000) 50.0 57.4 48.4 53.9 51.5 49.5 Board Break-Out Area is not distinguishable at this risetime (values are lumped together). All Rights Reserved 5 / 10
Insertion Loss: Bandwidth frequency is measured where the -3 db insertion loss occurred. EQCD Bandwidth Average of all product styles 3.00 2.50 2.00 Frequency, GHz 1.50 1.00 0.50 0.00 EQCD, 38 AWG 50 ohm Coax Individual Averages 4 Frequency, GHz 3.5 3 2.5 2 1.5 - - X - - X - - X 1 0.5 0 All Rights Reserved 6 / 10
Return Loss: Loss is measured at the frequency where the -3dB insertion loss occurred. EQCD, 38 AWG 50 ohm Coax Average of all product styles 0-5 -10 Loss, db -15-20 -25 EQCD, 38 AWG 50 ohm Coax Individual Averages 0 Return Loss, db -5-10 -15 - - X - - X - - X -20-25 -30 All Rights Reserved 7 / 10
Skew: Calculated as the difference between the propagation times for the outer row of contacts (rows 1 10) compared to the inner row of contacts (rows 1 10). EQCD, 38 AWG 50 ohm Coax Individual Averages 70 60 50 Skew, ps 40 30 20 - - X - - X - - X 10 0 All Rights Reserved 8 / 10
Voltage Drop: End to end voltage loss as a result of cable conductor resistance. Calculated for a current of 300 ma which is the maximum current carrying capacity for the cable conductor. 38 AWG 50 ohm Coax Voltage Drop at 300 ma 800 700 729 600 Voltage Drop in mv 500 400 300 364 200 100 111 0 Cable All Rights Reserved 9 / 10
Near End and Far End Crosstalk: Crosstalk was measured at a frequency where the -3 db insertion loss frequency occurred. EQCD, 38 AWG 50 ohm Coax Averages 13% 12% 11% NEXT FEXT 10% Crosstalk, % 9% 8% 7% 6% 5% 4% All Rights Reserved 10 / 10