DS4000 datasheet(3/16 Pages) DALLAS

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DS4000 Digitally Controlled TCXO

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AC ELECTRICAL CHARACTERISTICS: TCXO

(VCC = 5V ±5%, over the operating temperature range.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Output Frequency

CMOS (Note 5)

MHz

Frequency Stability vs.

Temperature

DF/TA

-1.0

+1.0

ppm

Frequency Stability vs. Voltage

DF/V

(Note 6)

±1.0

ppm/V

Frequency Stability vs. Aging

DF/Yr

±1.0

ppm/Yr

F1, F2 Rise and Fall Time, 10% to

90%

tR, tF

Max Output Capacitive Load

Duty Cycle

tW / t

10Hz

-85

100Hz

-115

1kHz

-129

10kHz

-134

Phase Noise f1 Output (Note 7)

100kHz

-139

dBc/Hz

Note 5: F1 is the base frequency as defined by the package markings. F2 is a programmable frequency output. The output frequency of F2 is

derived from the base frequency, F1, by programming the F2 frequency select register and duty cycle (DC) bit in the TCXO control

8 + 1) with DC = 0 and f1 / [2 x (28 + 1)] with DC = 1.

Note 6: First year typical.

Note 7: 16.384MHz, 5V, +25°C with one of the two outputs enabled.

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