MAX3673 데이터 시트보기 (PDF) - Microsemi Corporation

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MAX3673

Low-Jitter Frequency Synthesizer with Selectable Input Reference

Microsemi Corporation 

Low-Jitter Frequency Synthesizer

with Selectable Input Reference

Typical Operating Characteristics (continued)

(VCC = 3.3V, TA = +25°C, unless otherwise noted.)

SUPPLY CURRENT

vs. TEMPERATURE

500

450

ALL OUTPUTS ENABLED

AND TERMINATED

400

350

300

250

ALL OUTPUTS ENABLED

200

AND UNTERMINATED

150

100

50

0

-40 -15

10

35

60

85

TEMPERATURE (°C)

SPURS CAUSED BY POWER-SUPPLY NOISE

vs. SUPPLY NOISE FREQUENCY

0

fOUT = 122.88MHz

-10

-20

-30

-40

SUPPLY NOISE = 100mVP-P

-50

-60

-70

-80 SUPPLY NOISE = 50mVP-P

-90

-100

10k

100k

1M

10M

SUPPLY NOISE FREQUENCY (Hz)

JITTER HISTOGRAM WITH SUPPLY NOISE

(SUPPLY NOISE = 50mVP-P, 100kHz)

MAX3673 toc11

DJ = 5psP-P

2ps/div

DETERMINISTIC JITTER

vs. POWER-SUPPLY NOISE FREQUENCY

40

35

30

SUPPLY NOISE = 100mVP-P

25

20

15

SUPPLY NOISE = 50mVP-P

10

5

0

10k

100k

1M

10M

SUPPLY NOISE FREQUENCY (Hz)

DETERMINISTIC JITTER

vs. POWER-SUPPLY NOISE AMPLITUDE

40

35

fNOISE = 100kHz

30

25

fNOISE = 200kHz

20

15

fNOISE = 1MHz

10

5

0

0 50 100 150 200 250 300

SUPPLY NOISE AMPLITUDE (mVP-P)

POWER-ON-RESET

MAX3673 toc15

VCC

OUTxx

LOCK

200μs/div

MASTER RESET

MAX3673 toc16

REFERENCE CLOCK FAILURE DETECTION

MAX3673 toc17

MR

REFCLK1

OUTxx

IN1FAIL

LOCK

LOCK

40μs/div

2ms/div

_______________________________________________________________________________________ 7

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