Rainbow-electronics MAX31D80 Manuel d'utilisateur télécharger pdf (Page 7)

Spread-Spectrum Clock Generators

MAX31C80/MAX31D80

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Figure 1. Spread-Spectrum Frequency Modulation (Down Dithered)

Figure 2. Spread-Spectrum Frequency Modulation (Center Dithered)

f

CLKOUT

f

CLKOUT

- (0.25% TO 3%)

DOWN DITHERED (MAX31D80)

IF SMSEL0 = SMSEL1 = 0

FREQUENCY

TIME

DITHER AMOUNT

(-0.25% TO -3.0%)

1

DITHER CYCLE

RATE

f

CLKOUT

+ (0.25% TO 1.5%)

f

CLKOUT

- (0.25% TO 1.5%)

f

IN

CENTER DITHERED (MAX31C80)

IF SMSEL0 = SMSEL1 = 0

FREQUENCY

TIME

DITHER AMOUNT

(±0.25% TO ±1.5%)

1

DITHER CYCLE

RATE

1 2 3 4 5 6 7 8 9

MAX31C80/MAX31D80 1

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