Rainbow-electronics MAX9491 Manual do Utilizador descarregar pdf (Página 3)

MAX9491

Factory Programmable Single PLL

Clock Generator

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS

= V

DDA

= +3.0V to +3.6V, C

= 10pF and T

= -40°C to +85°C. Typical values are at V

= V

DDA

= 3.3V, T

= +25°C, unless

otherwise noted.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

OUTPUT CLOCK (CLK_OUT)

Minimum Frequency Range f

= 5MHz to 50MHz 4

Maximum Frequency Range

OUT

< 5pF 133 200

MHz

Clock Rise Time t

20% to 80% of V

, f

OUT

= 80MHz,

= 13MHz

1.5 ns

Clock Fall Time t

80% to 20% of V

, f

OUT

= 80MHz,

= 13MHz

1.3 ns

Duty Cycle f

OUT

= 45MHz, f

= 13MHz 44 50 56 %

OUT

= 45MHz, f

= 13MHz 14

OUT

= 80MHz, f

= 13MHz 22Output Period Jitter J

OUT

= 197MHz, f

= 13MHz 13

RMS

Soft Power-On Time t

PO2

PD from low to high, f

OUT

= 45MHz,

= 13MHz, see Figure 2

1ms

Hard Power-On Time t

PO1

See Figure 2 15 ms

VCXO CLOCK

Crystal Frequency f

XTL

27 MHz

Crystal Accuracy ±30 ppm

Tuning Voltage Range V

TUNE

03V

VCXO Tuning Range V

TUNE

= 0 to 3V, C

= C

= 4pF ±150 ±200 ppm

TUNE Input Impedance Z

TUNE

95 kΩ

Output CLK Accuracy V

TUNE

= 1.5V, C

= C

= 4pF ±50 ppm

Note 1: All parameters are tested at T

= +25°C. Specifications over temperature are guaranteed by design and characterization.

Note 2: Guaranteed by design and characterization; limits are set at ±6 sigma.

1 2 3 4 5 6 7 8 9 10 11

Clock Generator 1
Springer 11

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