AD9577BCPZ-R7 datasheet(6/44 Pages) AD

6 / 44 page

AD9577

Data Sheet

Rev. A | Page 6 of 44

PLL2 FRACTIONAL-N MODE CHARACTERISTICS

Table 3. Bleed = 1

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments1

NOISE CHARACTERISTICS

25 MHz crystal used

Phase Noise (155.52 MHz LVPECL Output)

Nb = 87, FRAC = 57, MOD = 625, Vx = 2, Dx = 7

At 1 kHz

−107

dBc/Hz

At 10 kHz

−115

dBc/Hz

At 100 kHz

−122

dBc/Hz

At 1 MHz

−146

dBc/Hz

At 10 MHz

−153

dBc/Hz

At 30 MHz

−152

dBc/Hz

Phase Noise (622.08 MHz LVPECL Output)

Nb = 99, FRAC = 333, MOD = 625, Vx = 2, Dx = 2

At 1 kHz

−95

dBc/Hz

At 10 kHz

−103

dBc/Hz

At 100 kHz

−109

dBc/Hz

At 1 MHz

−133

dBc/Hz

At 10 MHz

−148

dBc/Hz

At 30 MHz

−150

dBc/Hz

Phase Noise (155.52 MHz LVDS Output)

Nb = 87, FRAC = 57, MOD = 625, Vx = 2, Dx = 7

At 1 kHz

−107

dBc/Hz

At 10 kHz

−114

dBc/Hz

At 100 kHz

−122

dBc/Hz

At 1 MHz

−145

dBc/Hz

At 10 MHz

−154

dBc/Hz

At 30 MHz

−154

dBc/Hz

Phase Noise (622.08 MHz LVDS Output)

Nb = 99, FRAC = 333, MOD = 625, Vx = 2, Dx = 2

At 1 kHz

−95

dBc/Hz

At 10 kHz

−103

dBc/Hz

At 100 kHz

−109

dBc/Hz

At 1 MHz

−132

dBc/Hz

At 10 MHz

−147

dBc/Hz

At 30 MHz

−149

dBc/Hz

Phase Noise (155.52 MHz CMOS Output)

Nb = 87, FRAC = 57, MOD = 625, Vx = 2, Dx = 7

At 1 kHz

−107

dBc/Hz

At 10 kHz

−114

dBc/Hz

At 100 kHz

−122

dBc/Hz

At 1 MHz

−146

dBc/Hz

At 10 MHz

−154

dBc/Hz

At 30 MHz

−154

dBc/Hz

SPREAD SPECTRUM

Modulation Range

+0.1

−0.5

Downspread, triangle modulation profile

Modulation Frequency

31.25

kHz

Programmable

Peak Power Reduction

First harmonic of 100 MHz output, triangle modulation

profile, spectrum analyzer resolution bandwidth = 20 kHz

1 x indicates either 2 or 3 for any given test condition.

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