参数资料
型号: XA3S100E-4VQG100I
厂商: Xilinx Inc
文件页数: 19/37页
文件大小: 0K
描述: IC FPGA SPARTAN-3E 100K 100-VQFP
标准包装: 90
系列: Spartan®-3E XA
LAB/CLB数: 240
逻辑元件/单元数: 2160
RAM 位总计: 73728
输入/输出数: 66
门数: 100000
电源电压: 1.14 V ~ 1.26 V
安装类型: 表面贴装
工作温度: -40°C ~ 100°C
封装/外壳: 100-TQFP
供应商设备封装: 100-VQFP(14x14)
DS635 (v2.0) September 9, 2009
Product Specification
26
R
Digital Frequency Synthesizer
Duty Cycle(4)
CLKOUT_DUTY_CYCLE_DLL
Duty cycle variation for the CLK0, CLK90, CLK180,
CLK270, CLK2X, CLK2X180, and CLKDV outputs,
including the BUFGMUX and clock tree duty-cycle
distortion
-±[1% of
CLKIN period
+ 400]
ps
Phase Alignment(4)
CLKIN_CLKFB_PHASE
Phase offset between the CLKIN and CLKFB inputs
-
±200
ps
CLKOUT_PHASE_DLL
Phase offset between DLL outputs
CLK0 to CLK2X
(not CLK2X180)
-±[1% of
CLKIN period
+ 100]
ps
All others
-±[1% of
CLKIN period
+ 200]
ps
Lock Time
LOCK_DLL(3)
When using the DLL alone: The time
from deassertion at the DCM’s Reset
input to the rising transition at its
LOCKED output. When the DCM is
locked, the CLKIN and CLKFB
signals are in phase
5 MHz < FCLKIN <
15 MHz
-5
ms
FCLKIN > 15 MHz
-
600
μs
Delay Lines
DCM_DELAY_STEP
Finest delay resolution
20
40
ps
Notes:
1.
The numbers in this table are based on the operating conditions set forth in Table 6 and Table 26.
2.
Indicates the maximum amount of output jitter that the DCM adds to the jitter on the CLKIN input.
3.
For optimal jitter tolerance and faster lock time, use the CLKIN_PERIOD attribute.
4.
Some jitter and duty-cycle specifications include 1% of input clock period or 0.01 UI. Example: The data sheet specifies a maximum
jitter of “±[1% of CLKIN period + 150]”. Assume the CLKIN frequency is 100 MHz. The equivalent CLKIN period is 10 ns and 1% of
10 ns is 0.1 ns or 100 ps. According to the data sheet, the maximum jitter is ±[100 ps + 150 ps] = ±250ps.
Table 27: Switching Characteristics for the DLL (Continued)
Symbol
Description
-4 Speed Grade
Units
Min
Max
Table 28: Recommended Operating Conditions for the DFS
Symbol
Description
-4 Speed Grade
Units
Min
Max
Input Frequency Ranges(2)
FCLKIN
CLKIN_FREQ_FX
Frequency for the CLKIN input
0.200
333(4)
MHz
Input Clock Jitter Tolerance(3)
CLKIN_CYC_JITT_FX_LF
Cycle-to-cycle jitter at the CLKIN
input, based on CLKFX output
frequency
FCLKFX < 150 MHz
-±300
ps
CLKIN_CYC_JITT_FX_HF
FCLKFX > 150 MHz
-±150
ps
CLKIN_PER_JITT_FX
Period jitter at the CLKIN input
-±1
ns
Notes:
1.
DFS specifications apply when either of the DFS outputs (CLKFX or CLKFX180) are used.
2.
If both DFS and DLL outputs are used on the same DCM, follow the more restrictive CLKIN_FREQ_DLL specifications in Table 26.
3.
CLKIN input jitter beyond these limits may cause the DCM to lose lock.
4.
To support double the maximum effective FCLKIN limit, set the CLKIN_DIVIDE_BY_2 attribute to TRUE. This attribute divides the incoming
clock frequency by two as it enters the DCM.
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