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

ID 683301
Date 12/06/2024
Public
Document Table of Contents

E-Tile Transceiver Reference Clock Specifications

Table 46.  E-Tile Reference Clock LVPECL DC Electrical Characteristics For specification status, see the Data Sheet Status table
Symbol Refclk Parameter Min Typ Max Unit
VTT Termination voltage (2.5 V compliant) 0.4 0.5 0.6 V
Termination voltage (3.3 V compliant) 1.04 1.3 1.56 V
RTT Termination resistor 40 50 60
VDIFF Differential voltage 0.4 0.8 1.2 V
VCM Input common mode voltage (2.5 V compliant, no internal termination resistor) VDIFF/2 VCCCLK_GXE – VDIFF/2 V
Input common mode voltage (2.5 V compliant, internal termination resistor) VCCCLK_GXE – 1.6 VCCCLK_GXE – 1.3 VCCCLK_GXE – 1.0 V
Input common mode voltage (3.3 V compliant, no internal termination resistor) VDIFF/2 VCCCLK_GXE – VDIFF/2 V
Input common mode voltage (3.3 V compliant, internal termination resistor) 1.4 2 2.6 V
Table 47.  E-Tile Reference Clock Electrical and Jitter Requirements For specification status, see the Data Sheet Status table
Parameter Condition Min Typ Max Unit
Frequency 125 156.25 700 MHz
Frequency tolerance –100 100 ppm
Clock duty cycle 45 50 55 %
Rise/Fall times 20% to 80% 40 300 ps
Phase jitter 12 kHz to 20 MHz 0.375 0.5 ps rms
Phase noise62 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
62 The phase noise numbers in this table are the maximum acceptable phase noise values measured at a carrier frequency of 156.25 MHz. To calculate the phase noise requirement at any other frequency, use the formula: REFCLK phase noise at f (MHz) = REFCLK phase noise at 156.25 MHz + 20*log10(f/156.25).