Preliminary

P521-39

Low Phase Noise LVDS VCXO (65MHz to 130MHz)

47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991

Rev 3/02/04 Page 4

4. General Electrical Specifications

PARAMETERS

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNITS

Supply Current (Loaded Outputs)

at 3.3V @ 77.76MHz

40

mA

Oscillator off

10

Output valid after OE enabled

Oscillator on

1

ms

Operating Voltage

2.25

3.63

V

Output Clock Duty Cycle

@ 1.25V (LVDS)

45

50

55

%

Short Circuit Current

±50

mA

5. Jitter specifications

PARAMETERS

CONDITIONS

MIN.

TYP.

MAX.

UNITS

Period jitter RMS at 77.76MHz

2.5

Period jitter peak-to-peak at 77.76MHz

At 77.76MHz, with capacitive

decoupling between VDD and GND.

Over 10,000 cycles

18.5

20

ps

Accumulated jitter RMS at 77.76MHz

2.5

Accumulated jitter peak-to-peak at 77.76MHz

At 77.76MHz, with capacitive

decoupling between VDD and GND.

Over 1,000,000 cycles.

24

27

ps

Random Jitter

“RJ” measured on Wavecrest SIA 3000

2.5

ps

Integrated jitter RMS at 77.76MHz

Integrated 12 kHz to 20 MHz

0.5

0.7

ps

Measured on Wavecrest SIA 3000

6. Phase noise specifications

PARAMETERS

FREQUENCY

10Hz

100Hz

1kHz

10kHz

100kHz

1MHz

UNITS

Phase Noise

relative to carrier

77.76MHz

-75

-100

-125

-140

-145

-150

dBc/Hz

Note: Phase Noise measured at VCON = 0V