Keysight W2630 Series DDR2 DRAM BGA Probes Installation Guide
43
Characteristics, Regulatory, and Safety Information
4
CCtap1 0 Tap1_In C=Ctap
CCtap2 0 Tap2_In C=Ctap
CCtap3 0 Tap3_In C=Ctap
CCtip1 _net4688 Aggr_Probe C=Ctip
CCtip2 _net4697 Vic1_Probe C=Ctip
CCtip3 _net4707 Vic2_Probe C=Ctip
LL11 Aggr_Top Tap1_In 'Lint/2'
LL12 Tap1_In Aggr_Bot 'Lint/2'
LL21 Vic1_Top Tap2_In 'Lint/2'
LL22 Tap2_In Vic1_Bot 'Lint/2'
LL31 Vic2_Top Tap3_In 'Lint/2'
LL32 Tap3_In Vic2_Bot 'Lint/2'
RRtap1 Tap1_In _net4577 Rtap
RRtap2 Tap2_In _net4578 Rtap
RRtap3 Tap3_In _net4540 Rtap
RRterm1 _net4688 _net4689 Rterm
RRterm2 _net4697 _net4699 Rterm
RRterm3 _net4707 _net4708 Rterm
RRtip1 Aggr_Probe _net4688 Rtip
RRtip2 Vic1_Probe _net4697 Rtip
RRtip3 Vic2_Probe _net4707 Rtip
TTtap1 _net4577 Aggr_Probe 0 0 Z=Ztap E=360 F='1/(Ttap)'
TTtap2 _net4578 Vic1_Probe 0 0 Z=Ztap E=360 F='1/(Ttap)'
TTtap3 _net4540 Vic2_Probe 0 0 Z=Ztap E=360 F='1/(Ttap)'
VVterm1 _net4689 0 Vterm
VVterm2 _net4699 0 Vterm
VVterm3 _net4708 0 Vterm
.ends W2631_RevA1_Model_LogicProbe_SUBCKT
With Oscilloscope Probe
**********************************************************************************************************
*** Equivalent Load Model : W2631A/B, W2632A, W2633A/B and W2634A DDR2 Interposer Probes with Oscilloscope Probe
*** June 2007
*** Rev001
***
*** This SPICE subcircuit models the input impedance of the W2631A, W2632A, W2633 and W2634A DDR2
*** interposer probes. This models the effect of the probe loading on the system.
*** This is a 3-line model which includes mutual inductive and capacitive coupling from
*** one aggressing line to two adjacent victim pins (K12 & K13).
*** This model is accurate up to 3GHz for input impedance simulations.
***
*** Port Description:
***
*** Aggr_Top = Top pad of the interposer for the aggressor line
*** Aggr_Bot = Bottom pad of the interposer for the aggressor line
*** Aggr_Probe = Probe pad along perimeter of the interposer for the aggressor line
*** Vic1_Top = Top pad of the interposer for the Victim #1 line (K12, C12)
*** Vic1_Bot = Bottom pad of the interposer for the Victim #1 line (K12, C12)
*** Vic1_Probe = Probe pad along perimeter of the interposer for the Victim #1 line (K13, C13)
*** Vic2_Top = Top pad of the interposer for the Victim #2 line (K12, C12)
*** Vic2_Bot = Bottom pad of the interposer for the Victim #2 line (K12, C12)
*** Vic2_Probe = Probe pad along perimeter of the interposer for the Victim #2 line (K13, C13)
***
*** NOTE: The probe ground is assumed to be ideal and is labeled node 0
*** NOTE: K23, C23 is negligible
***
*** This model is used to simulate the load of the interposer with the Keysight N5425A ZIF Probe head
*** with the N5426A ZIF Tip attached and soldered to the observation pads on the interposer.
***
***
**********************************************************************************************************
.subckt W2631_RevA1_Model_ScopeProbe_SUBCKT
+ Aggr_Top Aggr_Bot Aggr_Probe
+ Vic1_Top Vic1_Bot Vic1_Probe
+ Vic2_Top Vic2_Bot Vic2_Probe
.param Zint=50
.param Tint='(169p)*0.062'
.param Lint='Zint*Tint'
.param Cint='Tint/Zint'
.param K12=0.21
.param K13=0.044
.param C12=6f
.param C13=1f