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CDK2000-LCO 参数 Datasheet PDF下载

CDK2000-LCO图片预览
型号: CDK2000-LCO
PDF下载: 下载PDF文件 查看货源
内容描述: 小数N分频时钟乘法器与内部LCO [Fractional-N Clock Multiplier with Internal LCO]
分类和应用: 时钟
文件页数/大小: 32 页 / 249 K
品牌: CIRRUS [ CIRRUS LOGIC ]
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CS2300-CP  
AC ELECTRICAL CHARACTERISTICS  
Test Conditions (unless otherwise specified): VD = 3.1 V to 3.5 V; T = -10°C to +70°C (Commercial Grade);  
A
C = 15 pF.  
L
Parameters  
Symbol  
fCLK_IN  
Conditions  
Min  
Typ  
Max Units  
Clock Input Frequency  
Clock Input Pulse Width  
50 Hz  
-
30  
MHz  
pwCLK_IN  
fCLK_IN < 175 kHz  
fCLK_IN > 175 kHz  
140  
10  
-
-
-
-
ns  
ns  
Clock Skipping Timeout  
tCS  
fCLK_SKIP  
fCLK_OUT  
tOD  
(Notes 4, 5)  
(Note 5)  
20  
-
-
-
80  
75  
55  
3.0  
3.0  
-
ms  
kHz  
Clock Skipping Input Frequency  
PLL Clock Output Frequency  
PLL Clock Output Duty Cycle  
Clock Output Rise Time  
50 Hz  
6
45  
-
-
MHz  
%
Measured at VD/2  
20% to 80% of VD  
80% to 20% of VD  
(Note 6)  
50  
1.7  
1.7  
35  
50  
150  
tOR  
ns  
Clock Output Fall Time  
tOF  
-
ns  
Period Jitter  
tJIT  
-
ps rms  
ps rms  
ps rms  
Base Band Jitter (100 Hz to 40 kHz)  
Wide Band JItter (100 Hz Corner)  
PLL Lock Time - CLK_IN (Note 9)  
(Notes 6, 7)  
-
-
(Notes 6, 8)  
-
-
tLC  
fCLK_IN < 200 kHz  
fCLK_IN > 200 kHz  
-
-
100  
1
200  
3
UI  
ms  
Notes: 4.  
t
represents the time from the removal of CLK_IN by which CLK_IN must be re-applied to ensure that  
CS  
PLL_OUT continues while the PLL re-acquires lock. This timeout is based on the internal VCO frequen-  
cy, with the minimum timeout occurring at the maximum VCO frequency. Lower VCO frequencies will  
result in larger values of t  
.
CS  
5. Only valid in clock skipping mode; See “CLK_IN Skipping Mode” on page 13 for more information.  
6. fCLK_OUT = 24.576 MHz; Sample size = 10,000 points; AuxOutSrc[1:0] = 11.  
7. In accordance with AES-12id-2006 section 3.4.2. Measurements are Time Interval Error taken with 3rd  
order 100 Hz to 40 kHz bandpass filter.  
8. In accordance with AES-12id-2006 section 3.4.1. Measurements are Time Interval Error taken with 3rd  
order 100 Hz Highpass filter.  
9. 1 UI (unit interval) corresponds to t  
or 1/f  
.
CLK_IN  
CLK_IN  
DS843F1  
7