9ZXL1930D / 9ZXL1950D Datasheet
Table 10. Filtered Phase Jitter Parameters – PCIe Independent Reference (IR) Architectures
Specification
Limits
Parameter
Symbol
Conditions
Minimum Typical Maximum
Units Notes
PCIe Gen 2
ps
t
t
t
t
0.9
0.6
1.05
0.68
2
1,2,5
(rms)
jphPCIeG2-SRIS
(PLL BW of 16MHz, CDR = 5MHz).
Phase Jitter,
PLL Mode
PCIe Gen 3
ps
0.7
1,2,5
(rms)
jphPCIeG3-SRIS
jphPCIeG2-SRIS
jphPCIeG3-SRIS
(PLL BW of 2–4MHz, CDR = 10MHz).
PCIe Gen 2
ps
0.01
0.01
0.042
0.042
1,2,4,5
(rms)
Additive Phase
Jitter, Bypass
Mode
(PLL BW of 16MHz, CDR = 5MHz).
Not
applicable
PCIe Gen 3
ps
1,2,4,5
(rms)
(PLL BW of 2–4MHz, CDR = 10MHz).
Notes for PCIe Filtered Phase Jitter tables (CC) and (IR).
1 Applies to all differential outputs, guaranteed by design and characterization.
2 Calculated from Intel™-supplied clock jitter tool when driven by 9SQL495x or equivalent with spread on and off.
3 Sample size of at least 100K cycles. This figure extrapolates to 108ps pk-pk at 1M cycles for a BER of 1-12
4 For RMS values, additive jitter is calculated by solving for b [b = sqrt(c2 - a2)] where “a” is rms input jitter and “c” is rms total jitter.
.
5 IR is the new name for Separate Reference Independent Spread (SRIS) and Separate Reference no Spread (SRNS) PCIe clock architectures.
According to the PCIe Base Specification Rev4.0 version 0.7 draft, the jitter transfer functions and corresponding jitter limits are not defined for the
IR clock architecture. Widely accepted industry limits using widely accepted industry filters are used to populate this table. There are no accepted
filters or limits for IR clock architectures at PCIe Gen1 or Gen4 data rates.
Table 11. Filtered Phase Jitter Parameters – QPI/UPI
Specification
Parameter
Symbol
Conditions
Minimum Typical Maximum
Limit
Units Notes
QPI & UPI
0.14
0.25
0.5
1,2
(100MHz or 133MHz, 4.8Gb/s, 6.4Gb/s 12UI).
t
t
jphQPI_UPI
QPI & UPI (100MHz, 8.0Gb/s, 12UI).
QPI & UPI (100MHz, > 9.6Gb/s, 12UI).
0.07
0.06
0.09
0.3
0.2
1,2
1,2
ps
Phase Jitter,
PLL Mode
(rms)
0.074
0.1
0.14
0.2
t
IF-UPI.
1
1,4,5
1,2,3
jphIF-UPI
0.17
QPI & UPI
0.00
0.01
(100MHz or 133MHz, 4.8Gb/s, 6.4Gb/s 12UI).
Additive
Phase Jitter,
Bypass Mode
ps
jphQPI_UPI
Not
applicable
QPI & UPI (100MHz, 8.0Gb/s, 12UI).
QPI & UPI (100MHz, > 9.6Gb/s, 12UI).
IF-UPI.
0.00
0.00
0.06
0.01
0.01
0.07
1,2,3
1,2,3
1,4
(rms)
t
jphIF-UPI
1 Applies to all differential outputs, guaranteed by design and characterization.
2 Calculated from Intel-supplied clock jitter tool, when driven by 9SQL495x or equivalent with spread on and off.
3 For RMS values, additive jitter is calculated by solving for b [b = sqrt(c2 - a2)] where “a” is rms input jitter and “c” is rms total jitter.
4 Calculated from phase noise analyzer when driven by Wenzel Associates source with Intel-specified brick-wall filter applied.
5 Top number is when the buffer is in Low BW mode; bottom number is when the buffer is in High BW mode.
©2018 Integrated Device Technology, Inc
12
April 13, 2018