AD9576 datasheet(6/65 Pages) AD

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AD9576

Data Sheet

Rev. A | Page 6 of 65

REFERENCE INPUTS

Table 4.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

DIFFERENTIAL INPUT MODE

Input Frequency

325

MHz

Input Sensitivity

100

mV p-p

Minimum Input Slew Rate

100

V/µs

Minimum limit imposed for jitter performance (when using

a sinusoidal source)

Minimum Pulse Width

1.38

Applies to both low and high pulses

Common-Mode Internally Generated

Bias Voltage

1.24

Common-Mode Voltage Tolerance

0.83

1.675

The acceptable common-mode range for a 200 mV p-p,

dc-coupled input signal

Differential Input Capacitance

Differential Input Resistance

4.3

kΩ

SINGLE-ENDED INPUT CMOS MODE

Input Frequency

200

MHz

Minimum Pulse Width

Applies to both low and high pulses

Hysteresis

240

Input Leakage

Input Capacitance

Input Voltage

High

1.93

Low

1.04

CRYSTAL RESONATOR MODE

Fundamental mode quartz resonator

Input Frequency

Reference of PLL0 or Buffered

Output

19.44

30.72

MHz

Reference of PLL1

MHz

REF2

Effective Series Resistance (ESR)

Ω

Input Capacitance

REFERENCE SWITCHOVER OUTPUT DISTURBANCE SPECIFICATIONS

Table 5.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

INSTANTANEOUS FREQUENCY (dθ/dt)

DISTURBANCE DUE TO REFERENCE

SWITCHOVER

350

ppm

peak

Applies only to PLL0 outputs; 1 ppm frequency offset

between the REF0 and REF1 channels; 400 kHz loop

bandwidth; smooth switchover enabled

INSTANTANEOUS PHASE DISTURBANCE

DUE TO REFERENCE SWITCHOVER

220

Applies only to the active reference of PLL0; smooth

switchover enabled

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