Intel Agilex® 7 FPGAs and SoCs Device Data Sheet: F-Series and I-Series

ID 683301
Date 12/04/2023
Public
Document Table of Contents

F-Tile Transceiver Reference Clock Specifications

Table 64.  F-Tile FHT Reference Clock Requirements For specification status, see the Data Sheet Status table
Parameter Description Condition Min Typical Max Unit
Frequency Reference clock frequency 100 156.25 200 MHz
Frequency accuracy Frequency accuracy of the reference clock, including temperature variability, aging, and initial variation ±100 ppm
Single sideband phase noise Measured SSB phase noise must be smaller than phase noise mask82 10 kHz –130 dB
100 kHz –138 dB
500 kHz –138 dB
3 MHz –140 dB
10 MHz –144 dB
20 MHz –146 dB
1 GHz –146 83 dB
Integrated RMS jitter Integrated over 10 kHz – 20 MHz, include spurious 522 fs
Table 65.  F-Tile FHT Reference Clocks Input Specifications

LVDS is recommended with on-board 100 nF AC-coupling capacitor.

For specification status, see the Data Sheet Status table

Parameter Description Condition Min Typical Max Unit
TREF-DUTY Duty cycle 45 50 55 %
TREF-RISE/FALL Rising and falling edge rate 20% – 80% 40 300 ps
TREF-SINGLEEND-SKEW Skew between REFCLKP and REFCLKN 5 ps
ZREF-SINGLEEND-DC Reference clock input impedance – terminated mode 40 50 60
VREFIN-SE-PP Input reference clock single-ended peak-to-peak voltage 200 510 mV
VREFIN-CM-AC Input reference clock common-mode voltage when AC-coupled on board  Set on-chip (no user access)
VREFIN-IL-DC Input reference clock input low voltage when DC-coupled on board 0.1 V
VREFIN-IH-DC Input reference clock input high voltage when DC-coupled on board  0.9 V
Table 66.  F-Tile FGT Reference Clock Input Specifications For specification status, see the Data Sheet Status table
Parameter Description Condition Min Typical Max Unit
Supported I/O standards Dedicated reference clock pin CML, HCSL
FREF Reference clock operating frequency 10084 380 MHz
TREF-DUTY Duty cycle 45 50 55 %
TREF-RISE/FALL Rising and falling edge rate 20% – 80% 0.15 × Tref_period ps
TREF-SINGLEEND-SKEW Skew between REFCLKP and REFCLKN 50 ps
ZREF-DIFF-DC 85 Reference clock differential input impedance – terminated mode 80 100 120
VREFIN-DIFF 86 Input reference clock differential peak-to-peak voltage 0.6 1.2 1.7 V
VREFIN-IL-DC Input reference clock input low voltage when DC-coupled on board 0 V
VREFIN-IH-DC Input reference clock input high voltage when DC-coupled on board    1 V
VREFIN-CM-AC Input reference clock common-mode voltage when AC-coupled on board Set on-chip (no user access) V
VREFIN-CM-DC Input reference clock common-mode voltage when DC-coupled on board 0.2 0.8 V
PNREF-SSB (156.25MHz) Reference clock measured single sideband phase noise mask including spurs must be smaller than phase noise mask87 10 kHz –130 dBc/Hz
100 kHz –138 dBc/Hz
500 kHz –138 dBc/Hz
3 MHz –140 dBc/Hz
10 MHz –144 dBc/Hz
20 MHz –146 dBc/Hz
1 GHz –146 dBc/Hz
VREFIN-RJ-RMS RMS jitter integrated from 10 kHz – 20 MHz including spurs 522 fs
VREFIN-PPM-ERROR Reference clock frequency error –350 + SSC +350 + SSC ppm
Figure 4. Simplified F-Tile FGT Reference Clock Input Buffer
Table 67.  F-Tile FGT Reference Clock Output Driver Specifications For specification status, see the Data Sheet Status table
Parameter Description Condition Min Typical Max Unit
FREF_OUT Reference clock operating frequency 25 800 MHz
TREF-DUTY_OUT Duty cycle 45 50 55 %
TREF-RISE_OUT/FALL_OUT Rising and falling edge rate 20% – 80% 0.15 × Tref_period ps
TREF-SINGLEEND-SKEW Skew between REFCLKP and REFCLKN 50 ps
ZREF-DIFF-DC_OUT Reference clock differential output impedance – terminated mode 80 100 120
VREFIN-DIFF-AC_OUT Output reference clock differential peak to peak voltage when AC-coupled on board 0.9 1 1.1 V
VREFIN-CM-OUT 88 Output reference clock common-mode 0.45 0.5 0.55 V
82 Add an offset of 20 × log10(Fclk/156.25 MHz) dB to mask values, where Fclk is reference clock frequency.
83 The phase noise mask requirement between 20 MHz and 1 GHz excludes any harmonics power of the fundamental clock.
84 This value is 100 MHz for down SSC (Spread Spectrum Clocking) clocking. This value can also be 25 MHz for HDMI rate of less than 1 Gbps.
85 These termination resistors are part of the reference clock input buffer on-chip, and are always present and no external termination or DC biasing is needed if AC-coupled on board. If DC-coupled on board, external biasing is not required unless a signaling standard other than differential 100 Ω termination is required.
86 LVDS is recommended with on-board AC-coupling and subject to 0.6 V ≤ VREFIN-DIFF ≤ 1.7 V.
87 Add an offset of 20 × log10(Fcc/Hzlk/156.25 MHz) dB to mask values, where Fclk is reference clock frequency.
88 If your far-end differential termination is comprised of two 50 Ω terminations to GND, the common-mode voltage is nominally 250 mV. If your far-end differential termination is comprised of a single 100 Ω differential termination between the P and N signals, the common-mode voltage is nominally 500 mV.