Rainbow-electronics MAX3627 Manuel d'utilisateur télécharger pdf (Page 3)

MAX3627

+3.3V, Low-Jitter, Precision Clock

Generator with Multiple Outputs

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ELECTRICAL CHARACTERISTICS (continued)

= +3.0V to +3.6V, T

= 0°C to +70°C, unless otherwise noted. Typical values are at V

= +3.3V, T

= +25°C, unless otherwise

noted. When using X_IN, X_OUT input, no signal is applied at OSC_IN. When PLL is enabled, PLL_BP = high-Z or high. When PLL is

bypassed, PLL_BP = low.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

INPUT SPECIFICATIONS (FSELA, FSELB, PLL_BP, OE)

Input-Voltage High V

2.0 V

Input-Voltage Low V

0 0.8 V

Input High Current I

= V

80 μA

Input Low Current I

= 0 -80 μA

LVCMOS/LVTTL INPUT SPECIFICATIONS (OSC_IN) (Note 6)

PLL enabled 25

Input Clock Frequency

PLL bypassed 20 320

MHz

Input Amplitude Range (Note 7) 1.2 3.6 V

Input High Current I

= V

80 μA

Input Low Current I

= 0 -80 μA

Reference Clock Duty Cycle 40 50 60 %

Input Capacitance C

1.5 pF

CLOCK OUTPUT AC SPECIFICATIONS

VCO Center Frequency 625 MHz

FSELA = GND 125

FSELA = V

156.25

Output Frequency with PLL

Enabled (Q0)

FSELA = high-Z 312.5

MHz

FSELB = GND 125

FSELB = V

156.25

Output Frequency with PLL

Enabled (Q1 to Q7)

FSELB = high-Z (Note 8) 312.5

MHz

LVDS outputs 20 320

Output Frequency with PLL

Disabled

LVCMOS output 20 160

MHz

12kHz to 20MHz, PLL_BP = high (Note 9) 0.4 1.0

Integrated Phase Jitter RJ

RMS

12kHz to 20MHz, PLL_BP = high-Z

(Note 10)

0.4

RMS

LVDS outputs -64

Power-Supply Noise Rejection

(Note 11)

PSNR

LVCMOS output -49

dBc

LVDS outputs 2.5

Deterministic Jitter Due to

Supply Noise (Note 12)

LVCMOS output 18

P-P

Nonharmonic and Subharmonic

Spurs

(Note 13) -70 dBc

f = 100Hz -115

f = 1kHz -124

f = 10kHz -126

f = 100kHz -130

f = 1MHz -143

LVDS Clock Output SSB Phase

Noise at 125MHz (Note 14)

f > 10MHz -149

dBc/Hz

1 2 3 4 5 6 7 8 9 10 11

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Rainbow-electronics MAX3627 Manuel d'utilisateur Page 3

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