参数资料
型号: XC3S400AN-4FG400I
厂商: Xilinx Inc
文件页数: 74/123页
文件大小: 0K
描述: IC FPGA SPARTAN 3AN 400FBGA
标准包装: 60
系列: Spartan®-3AN
LAB/CLB数: 896
逻辑元件/单元数: 8064
RAM 位总计: 368640
输入/输出数: 311
门数: 400000
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: 400-BGA
供应商设备封装: 400-FBGA(21x21)
Spartan-3AN FPGA Family: DC and Switching Characteristics
DS557 (v4.1) April 1, 2011
Product Specification
54
Digital Frequency Synthesizer (DFS)
Delay Lines
DCM_DELAY_STEP(5)
Finest delay resolution, average over all taps
All
15
35
15
35
ps
Notes:
1.
The numbers in this table are based on the operating conditions set forth in Table 10 and Table 39.
2.
Indicates the maximum amount of output jitter that th
e 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. For 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] = ±250 ps.
5.
The typical delay step size is 23 ps.
Table 41: Recommended Operating Conditions for the DFS
Symbol
Description
Speed Grade
Units
-5
-4
Min
Max
Min
Max
Input Frequency Ranges(2)
FCLKIN
CLKIN_FREQ_FX
Frequency for the CLKIN input
0.200
0.200
MHz
Input Clock Jitter Tolerance(4)
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 39.
3.
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.
4.
CLKIN input jitter beyond these limits may cause the DCM to lose lock.
Table 40: Switching Characteristics for the DLL (Cont’d)
Symbol
Description
Device
Speed Grade
Units
-5
-4
Min
Max
Min
Max
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