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

ID 769310
Date 9/05/2025
Public
Document Table of Contents

I/O PLL Specifications

Table 37.  I/O PLL Specifications

The specifications in this table are applicable to I/O bank I/O PLL , fabric-feeding I/O PLL, and UIB fabric-feeding PLL.

For specification status, see the Data Sheet Status table

Symbol Parameter Condition Minimum Typical Maximum Unit
fIN Input clock frequency source from Core Clock Input or Reference Clock Input –1V 10 1,10059 MHz
–2V 10 90059 MHz
–3V, –3E 10 62559 MHz
Input clock frequency source from IO Clock Input –1V 10 80059 MHz
–2V 10 71759 MHz
–3V, –3E 10 62559 MHz
fINPFD Input clock frequency to the PFD 10 325 MHz
fVCO I/O PLL VCO operating range –1V 600 3,200 MHz
–2V 600 3,200 MHz
–3V, –3E 600 2,400 MHz
fCLBW I/O PLL closed-loop bandwidth 0.5 20 MHz
fOUT Output frequency for internal clock (C counter) –1V 1,100 MHz
–2V 1,000 MHz
–3V, –3E 780 MHz
fOUT_EXT Output frequency for external clock output –1V 800 MHz
–2V 717 MHz
–3V, –3E 625 MHz
tOUTDUTY Duty cycle for dedicated external clock output (when set to 50%) fOUT_EXT < 300 MHz 45 50 55 %
fOUT_EXT ≥ 300 MHz 40/45 60 50 55 60/60 %
tFCOMP 61 External feedback clock compensation time 5 ns
fDYCONFIGCLK Dynamic configuration clock 100 MHz
tLOCK Time required to lock from end-of-device configuration or deassertion of areset 1 ms
tDLOCK Time required to lock dynamically (after switchover or reconfiguring any non-post-scale counters/delays) 1 ms
tPLL_PSERR Accuracy of PLL phase shift ±50 ps
tARESET Minimum pulse width on the areset signal 10 ns
tINCCJ Input clock cycle-to-cycle jitter fREF < 100 MHz 62 ±750 ps (p-p)
fREF ≥ 100 MHz 62 0.15 UI (p-p)
tREFPJ Reference phase jitter (rms)63 Carrier frequency: 100 MHz with integrated bandwidth of 10 kHz to 50 MHz 1.42 ps
tREFPN Reference phase noise64 63 10 Hz –90 dBc/Hz
100 Hz –100 dBc/Hz
1 kHz –110 dBc/Hz
10 kHz –120 dBc/Hz
100 kHz –130 dBc/Hz
1 MHz –138 dBc/Hz
10 MHz –142 dBc/Hz
100 MHz –144 dBc/Hz
tOUTPJ_DC 61 65 Period jitter for dedicated clock output fOUT < 100 MHz 62 17.5 mUI (p-p)
fOUT ≥ 100 MHz 62 175 ps (p-p)
tOUTCCJ_DC 61 65 Cycle-to-cycle jitter for dedicated clock output fOUT < 100 MHz 62 17.5 mUI (p-p)
fOUT ≥ 100 MHz 62 175 ps (p-p)
tOUTPJ_IO 66 65 Period jitter for clock output on the regular I/O fOUT < 100 MHz 62 60 mUI (p-p)
fOUT ≥ 100 MHz 62 600 ps (p-p)
tOUTCCJ_IO 66 65 Cycle-to-cycle jitter for clock output on the regular I/O fOUT < 100 MHz 62 60 mUI (p-p)
fOUT ≥ 100 MHz 62 600 ps (p-p)
tCASC_OUTPJ_DC 61 Period jitter for dedicated clock output in cascaded PLLs fOUT < 100 MHz 62 17.5 mUI (p-p)
fOUT ≥ 100 MHz 62 175 ps (p-p)
tEINDUTY Input clock or external feedback clock input duty cycle fIN ≥ 600 MHz 30 70 %
450 MHz ≤ fIN < 600 MHz 35 65 %
250 MHz ≤ fIN < 450 MHz 40 60 %
10 MHz ≤ fIN < 250 MHz 45 55 %
59 This specification is limited by the I/O maximum frequency. The maximum achievable I/O frequency is different for each I/O standard and is dependent on design and system specific factors. Ensure proper timing closure in your design and perform HSPICE/IBIS simulations based on your specific design and system setup to determine the maximum achievable frequency in your system.
60 To achieve 5% duty cycle for fOUT_EXT ≥ 300 MHz, you only can use tx_outclk port from the LVDS SERDES FPGA IP. Refer to the related information for the detail design guidelines.
61 Not applicable for fabric-feeding PLL.
62 fREF is fIN/N, specification applies when N = 1.
63 Requirement for Advanced Interface Bus (AIB), High Bandwidth Memory (HBM) Interface, DDR/LPDDR protocol, and LVDS SERDES applications only.
64 The phase noise numbers in the table above are the maximum acceptable phase noise values measured at a carrier frequency of 100 MHz. To calculate the phase noise requirement at any other frequency, use the formula: REFCLK phase noise at f (MHz) = REFCLK phase noise at 100 MHz + (20 × log10 (f/100)).
65 This jitter specification does not include the effect of spread-spectrum clock. The magnitude of jitter deterioration is largely depend on the spread-spectrum clock profile used. Refer to the related information for the recommended spread-spectrum clock profile.
66 External memory interface clock output jitter specifications use a different measurement method, which are available in the Memory Output Clock Jitter Specifications table.