Rainbow-electronics MAX3622 Uživatelský manuál stáhnout pdf (Strana 4)

MAX3622

Low-Jitter, Precision Clock Generator

with Two Outputs

4 _______________________________________________________________________________________

Typical Operating Characteristics

(Typical values are at V

= +3.3V, T

= +25°C, crystal frequency = 25MHz.)

SUPPLY CURRENT vs. TEMPERATURE

MAX3622 toc01

AMBIENT TEMPERATURE (°C)

SUPPLY CURRENT (mA)

605040302010

100

125

150

070

BOTH OUTPUTS ACTIVE AND TERMINATEDBOTH OUTPUTS ACTIVE AND TERMINATED

BOTH OUTPUTS ACTIVE AND UNTERMINATED

DIFFERENTIAL OUTPUT WAVEFORM

AT 156.25MHz (LVPECL OUTPUT)

MAX3622 toc02

1ns/div

AMPLITUDE (200mv/div)

OUTPUT WAVEFORM AT 125MHz

(LVCMOS OUTPUT)

MAX3622 toc03

1ns/div

AMPLITUDE (50mV/div)

MEASURED USING 50Ω OSCILLOSCOPE INPUT

THROUGH NETWORK SHOWN IN FIGURE 1

QB PHASE NOISE

(156.25MHz CLOCK FREQUENCY)

MAX3622 toc04

OFFSET FREQUENCY (kHz)

NOISE POWER DENSITY (dBc/Hz)

10,00010001 10 100

-150

-140

-130

-120

-110

-100

-90

-80

-160

0.1 100,000

QA_C PHASE NOISE

(125MHz CLOCK FREQUENCY)

MAX3622 toc05