ICS670M-03ILF datasheet(5/6 Pages) ICST

tên linh kiện	ICS670M-03ILF

Giải thích chi tiết về linh kiện	LOW PHASE NOISE, ZERO DELAY BUFFER AND MULTIPLIER

PDF	6 Pages

Scroll/Zoom	100%

nhà sản xuất	ICST [Integrated Circuit Systems]

Trang chủ	http://www.icst.com

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LOW PHASE NOISE, ZERO DELAY BUFFER AND MULTIPLIER

MDS 670-03 G

Revision 010306

Integrated Circuit Systems l 525 Race Street, San Jose, CA 95126 l tel (408) 297-1201 l

www.icst.com

ICS670-03

Figure 1. Skew from ICLK to CLK2, with change in load capacitance (VDD = 3.3V)

Adjusting Input/Output Skew

The data in Figure 1 can be used to adjust individual circuit characteristics and achieve the minimum

possible skew between ICLK and CLK2. With a 125 MHz output, for example, having a total load

capacitance of 15 pF will result in nearly zero skew between ICLK and CLK2. Note that the load

capacitance includes board trace capacitance, input capacitance of the load being driven by the

ICS670-03, and any additional capacitors connected to CLK2.

Figure 2. Phase Noise at 125 MHz out, 25 MHz clock input (VDD = 3.3V)

-400

-300

-200

-100

100

200

300

100

125

150

CLK2 Frequency (MHz)

Skew (ps) 20 pF

Skew (ps) 10 pF

ICS670 Phase noise

-140

-120

-100

-80

-60

-40

-20

10.E+0

100.E+0

1.E+3

10.E+3

100.E+3

1.E+6

10.E+6

offset frequency

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