Rainbow Electronics MAX31D80 - Manual (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