MAX3622 データシートの表示（PDF） - Maxim Integrated

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MAX3622

Low-Jitter, Precision Clock Generator with Two Outputs

Maxim Integrated 

Low-Jitter, Precision Clock Generator

with Two Outputs

ELECTRICAL CHARACTERISTICS (continued)

(VCC = +3.0V to +3.6V, TA = 0°C to +70°C, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25°C, unless otherwise

noted.) (Notes 1, 2)

PARAMETER

SYMBOL

CLOCK OUTPUT AC SPECIFICATIONS

VCO Frequency Range

Random Jitter

RJRMS

CONDITIONS

12kHz to 20MHz

1.875MHz to 20MHz

MIN TYP MAX UNITS

620

625

648

MHz

0.36

0.14

1.0

psRMS

Deterministic Jitter Induced by

Power-Supply Noise

(Notes 5, 6)

LVPECL output

LVCMOS output

4

psP-P

19

Spurs Induced by Power-Supply

Noise (Note 6)

LVPECL output

LVCMOS output

-57

dBc

-47

Nonharmonic and Subharmonic

Spurs

-70

dBc

f = 1kHz

-124

Clock Output SSB Phase Noise

at 125MHz

f = 10kHz

f = 100kHz

f = 1MHz

-126

-130

-145

dBc/H z

f > 10MHz

-153

Note 1:

Note 2:

Note 3:

Note 4:

Note 5:

Note 6:

A series resistor of up to 10.5Ω is allowed between VCC and VCCA for filtering supply noise when system power-supply

tolerance is VCC = 3.3V ±5%. See Figure 2.

LVPECL terminated with 50Ω load connected to VTT = VCC - 2V.

Both outputs enabled and unloaded.

Measured using setup shown in Figure 1 with VCC = 3.3V ±5%.

Measured with Agilent DSO81304A 40GS/s real-time oscilloscope.

Measured with 40mVP-P, 100kHz sinusoidal signal on the supply with VCCA connected as shown in Figure 2.

MAX3622

36Ω

QA_C

499Ω 0.1μF

4.7pF

Z0 = 50Ω

OSCILLOSCOPE

50Ω

Figure 1. LVCMOS Output Measurement Setup

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