0.65mm Pitch BGA Socket Adapter System SIGNAL INTEGRITY SIMULATION AND MODELING Rev. 0 www.advanced.com
SI Modeling & Simulation Study SI Simulation Setup The 0.65 mm Socket-Adapter model was setup in CST Microwave Studio with a common GND net connecting all GND terminals together Socket Adapter was measured from 50 MHz to 20.05 GHz. A pin-out of 3 rows and 4 columns was assigned from a 4x4 array: Common GND net connected together and surrounding all signal terminals. S1+ S1- De-embedded Waveguide Ports GND GND GND GND S1+ S1- S2+ S2- GND GND GND GND
SI Modeling & Simulation Study Performance Results The test and measurement tasks were completed and the recommended Operational Bandwidth for the Socket Adapter System is as follows: Differential: DC to 3.10 GHz @ -15dB and ~2.0 to 3.3 Gbit/sec. Differential: DC to 10.0 GHz @ -10dB and ~6.4 to 10.7 Gbit/sec. Single-ended S1+: DC to 8.0 GHz @ -16dB and ~5.1 to 8.5 Gbit/sec. Single-ended S1-: DC to 8.0 GHz @ -13dB and ~5.1 to 8.5 Gbit/sec. At the above Bandwidths, the Impedance of this connector system is low. This has been attributed to the geometry of the female shell and the proximity of adjacent terminals.
SI Modeling & Simulation Study Performance Results continued Differential Eye Diagrams were successfully formed at 5 Gbits/sec., with Jitter at 3psec and 4% eye closure using a 6 Gbits/sec aggressor. The eye opening sustains a Data Mask with a voltage swing of ±175mV @ 100psec period. Single-ended Eye Diagrams were successfully formed at 5 Gbits/sec., with Jitter at 3psec and 4% eye closure using a 6 Gbits/sec aggressor. The eye opening sustains a Data Mask with a voltage swing of ±125mV @ 140psec period.
SI Modeling & Simulation Study Performance Results continued Return Loss (Sω,θ) Insertion Loss (Sφ,ß) Zo @ 100 psec (10-90%) Zo @ 200 psec (10-90%) Differential (Terminals S1+, S1-) (S1,1) -10.0dB @ 10.0 GHz -15.0dB @ 3.1 GHz (S2,1) -0.70dB @ 10.0 GHz -0.20dB @ 3.10 GHz 83.0Ω 90.2Ω Single-ended (Terminals S1+) (S1,1) -16.0dB @ 8.0 GHz (S2,1) -0.50dB @ 8.0 GHz 48.2Ω 49.3Ω Single-ended (Terminals S1-) (S3,3) -13.0dB @ 8.0 GHz (S4,3) -0.75dB @ 8.0 GHz 45.5Ω 47.8Ω A Return Loss at -15dB (~18% Reflection) is the normally accepted industry standard. Most applications will tolerate data at -10 db (~32% Reflection), however in this instance, performance safety margins may be increased by de-rating the connectors Operational Bandwidth and Data Rate. A Insertion Loss at -3dB (~50% of applied Power & ~71% of applied Voltage arrives at the Output Port) is the normally accepted industry standard. An Effective Impedance of 100Ω ±10Ω for Differential and 50Ω ±5Ω for Single-ended is the normally accepted industry guideline. De-rating the signal input risetime will improve the above Zo values.
SI Modeling & Simulation Study Performance Results continued NeXT @ 100 psec NeXT @ 200 psec (10-90%) FeXT @ 100 psec FeXT @ 200 psec (10-90%) Eye-Diagram @ 5 Gbit/sec Eye-Diagram @ 5 Gbit/sec with 6 Gbit/sec Aggressor Differential (Terminals S1+, S1-) 2.40% 1.37% 0.85% 0.47% Peak-to-Peak Jitter = 1 psec Eye-Closure = 3% Peak-to-Peak Jitter = 3 psec Eye-Closure = 4% Single-ended (Terminals S1-) 6.45% 3.60% 0.56% 0.23% Peak-to-Peak Jitter = 1 psec Eye-Closure = 2% Peak-to-Peak Jitter = 3 psec Eye-Closure = 4% A NeXT at 5% maximum is the normally accepted industry standard. Some customers may specify a value as low as 2% maximum for this attribute. NeXT results are good. A FeXT at 2% maximum is the normally accepted industry standard. Some customers may specify a value as low as 1% maximum for this attribute. FeXT results are excellent. A successful Eye-opening was created at 5 Gbit/sec and is excellent as this data rate is well within the Operational Bandwidths recommended for this connector system. See note below. NOTE: It s not practical to define pass-or-fail criteria for Jitter and Eye-Closure. However, guidelines for the connector s transmit Data Mask can be defined to quantify the effective performance of the eye formation. For a Differential data mask, the total voltage equals 35% of the eye s applied peak-to-peak voltage, (1V in this report), and its period equals 50% of the risetime, (200psec in this report). For a Single-ended data mask, the total voltage equals 50% of the eye s applied peak-topeak voltage, (500mV in this report), and its period equals 70% of the risetime, (200psec in this report).
Differential Return Loss Plot Range: DC to 20 GHz 0-10 db(s(1,1)) -20-30 -40 (S1,1) -10.00dB @ 10.00GHz -15.00dB @ 3.10GHz -50 0 2 4 6 8 1 0 12 14 16 18 20 freq, GHz
Differential Return Loss Plot Range: DC to 10 GHz 0-10 db(s(1,1)) -20-30 -40 (S1,1) -10.00dB @ 10.00GHz -15.00dB @ 3.10GHz -50 0 1 2 3 4 5 6 7 8 9 10 freq, GHz
Differential Insertion Loss Plot Range: DC to 20 GHz db(s(2,1)) 0-1 -2-3 -4-5 -6-7 -8-9 -10 (S2,1) -0.70dB @ 10.00 GHz -0.20dB @ 3.100 GHz 0 2 4 6 8 1 0 12 14 16 18 20 freq, GHz
Differential Insertion Loss Plot Range: DC to 10 GHz 0-1 db(s(2,1)) -2-3 -4 (S2,1) -0.70dB @ 10.0 GHz -0.20dB @ 3.1 GHz -5 0 1 2 3 4 5 6 7 8 9 10 freq, GHz
Single-ended Return Loss for S1+ & S1- Plot Range: DC to 20 GHz 0-10 db(s(2,2)) db(s(1,1)) -20-30 -40 S1+ (S1,1) -16.00dB @ 8.00 GHz S1- (S2,2) -13.00dB @ 8.00GHz -50 0 2 4 6 8 10 12 14 16 18 20 freq, GHz
Single-ended Return Loss for S1+ & S1- Plot Range: DC to 10 GHz 0-10 db(s(2,2)) db(s(1,1)) -20-30 -40 S1+ (S1,1) -16.00dB @ 8.00 GHz S1- (S2,2) -13.00dB @ 8.00GHz -50 0 1 2 3 4 5 6 7 8 9 10 freq, GHz
Single-ended Insertion Loss for S1+ & S1- Plot Range: DC to 20 GHz db(s(6,2)) db(s(5,1)) 0-1 -2-3 -4-5 -6-7 -8-9 -10 S1+ (S5,1) -0.50dB @ 8.00GHz S1- (S6,2) -0.75dB @ 8.00GHz 0 2 4 6 8 10 12 14 16 18 20 freq, GHz
Single-ended Insertion Loss for S1+ & S1- Plot Range: DC to 10 GHz 0-1 db(s(6,2)) db(s(5,1)) -2-3 -4 S1+ (S5,1) -0.50dB @ 8.00GHz S1- (S6,2) -0.75dB @ 8.00GHz -5 0 1 2 3 4 5 6 7 8 9 10 freq, GHz
Differential Impedance Profile 105 100ps risetime (10-90%) zs diff[1][1::1200] 100 95 90 85 80 83.0Ω 0.0 0.2 0.4 0.6 0.8 1.0 1.2 time, ns e c
Differential Impedance Profile 102 100 200ps risetime (10-90%) zs diff[2][1::1200] 98 96 94 92 90 90.2Ω 0.0 0.2 0.4 0.6 0.8 1.0 1.2 time, ns e c
Single-ended Impedance Profile for S1+ & S1- Simultaneous Plots at 100 psec risetime (10-90%) S1+ (Zsp Edge Terminals) vs. S1- (Zsn Interior Terminals) 51 50 zsn[1][1::1200] zsp[1][1::1200] 49 48 47 46 45 48.2Ω 45.5Ω 0.0 0.2 0.4 0.6 0.8 1.0 1.2 time, nsec
Single-ended Impedance Profile for S1+ & S1- Simultaneous Plots at 200 psec risetime (10-90%) S1+ (Zsp Edge Terminals) vs. S1- (Zsn Interior Terminals) 50.5 50.0 zsn[2][1::1200] zsp[2][1::1200] 49.5 49.0 48.5 48.0 47.5 49.3Ω 47.8Ω 0.0 0.2 0.4 0.6 0.8 1.0 1.2 time, nsec
Differential Near-end Crosstalk (NeXT) 0.0 Percent Differential NeXT @ 100ps risetime (10-90%) -0.5 100*(xnep[1][0::1000]-xnen[1][0::1000]) -1.0-1.5-2.0-2.5 2.40% 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 time, nsec
Differential Near-end Crosstalk (NeXT) 0.0 Percent Differential NeXT @ 200ps risetime (10-90%) -0.2 100*(xnep[2][0::1000]-xnen[2][0::1000]) -0.4-0.6-0.8-1.0-1.2-1.4 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 time, nsec 1.37%
Differential Far-end Crosstalk (FeXT) 0.2 Percent Differential FeXT @ 100ps risetime (10-90%) -0.0 100*(xfep[1][0::1000]-xfen[1][0::1000]) -0.2-0.4-0.6-0.8-1.0 0.85% 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 time, nsec
Differential Far-end Crosstalk (FeXT) 0.1 Percent Differential FeXT @ 200ps risetime (10-90%) 0.0 100*(xfep[2][0::1000]-xfen[2][0::1000]) -0.1-0.2-0.3-0.4-0.5 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 time, nsec 0.47%
Single-ended Near-end Crosstalk (NeXT) 7 Percent Single-ended NeXT @ 100ps risetime (10-90%) 6 6.45% 5 100*(xne[1][0::1000]) 4 3 2 1 0-1 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 time, nsec
Single-ended Near-end Crosstalk (NeXT) Percent Single-ended NeXT @ 200ps risetime (10-90%) 4.0 3.5 3.60% 3.0 2.5 100*(xne[2][0::1000]) 2.0 1.5 1.0 0.5 0.0-0.5 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 time, nsec
Single-ended Far-end Crosstalk (FeXT) Percent Single-ended FeXT @ 100ps risetime (10-90%) 0.6 0.5 0.56% 0.4 100*(xfe[1][0::1000]) 0.3 0.2 0.1 0.0-0.1 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 time, nsec
Single-ended Far-end Crosstalk (FeXT) Percent Single-ended FeXT @ 200ps risetime (10-90%) 0.25 0.20 0.23% 100*(xfe[2][0::1000]) 0.15 0.10 0.05 0.00-0.05 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 time, nsec
Differential Eye-Diagram eye(voutp-voutn, 2.5e9) 0.6 0.5 0.4 0.3 0.2 0.1 0.0-0.1-0.2-0.3-0.4-0.5-0.6 Eye Opening @ 5 Gbit/sec. Peak-to-peak jitter is 1 psec and Eye-Closure is 3% -50 0 50 100 150 200 250 300 350 400 450 time, psec
Differential Eye-Diagram w/aggressor eye(voutp-voutn, 2.5e9) Eye Opening @ 5 Gbit/sec with a 6 Gbit/sec Aggressor 0.6 0.5 0.4 0.3 0.2 0.1 0.0-0.1-0.2-0.3-0.4-0.5-0.6 Peak-to-peak jitter is 3 psec and Eye-Closure is 4% ±175mV @ 100psec Data Mask -50 0 50 100 150 200 250 300 350 400 450 time, psec
Single-ended Eye-Diagram 0.6 Eye Opening @ 5 Gbit/sec. Peak-to-peak jitter is 1 psec and Eye-Closure is 2% 0.5 eye(voutp, 2.5e9) 0.4 0.3 0.2 0.1 0.0-0.1-50 0 50 100 150 200 250 300 350 400 450 time, psec
Single-ended Eye-Diagram w/aggressor Eye Opening @ 5 Gbit/sec with a 6 Gbit/sec Aggressor 0.6 0.5 Peak-to-peak jitter is 3 psec and Eye-Closure is 4% eye(voutp, 2.5e9) 0.4 0.3 0.2 0.1 0.0-0.1 ±125mV @ 140psec Data Mask -50 0 50 100 150 200 250 300 350 400 450 time, psec
Propagation Delay 1.2 1.0 0.8 33 psec vin[0][0::1000] vout[0][0::1000] 0.6 0.4 m2 time= 223.3psec vin[0][0::1000]=0.209 m1 time= 256.3psec vout[0][0::1000]=0.199 0.2 m2 m1 0.0 0 100 200 300 400 500 time, psec