AD9522-2 datasheet(7/84 Pages) AD

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AD9522-2

Rev. 0 | Page 7 of 84

CLOCK INPUTS

Table 3.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

CLOCK INPUTS (CLK, CLK)

Differential input

Input Frequency

2.4

GHz

High frequency distribution (VCO divider)

1.6

GHz

Distribution only (VCO divider bypassed); this is the

frequency range supported by the channel divider

Input Sensitivity, Differential

150

mV p-p

Measured at 2.4 GHz; jitter performance is improved with

slew rates > 1 V/ns

Input Level, Differential

V p-p

Larger voltage swings can turn on the protection diodes

and can degrade jitter performance

Input Common-Mode Voltage, VCM

1.3

1.57

1.8

Self-biased; enables ac coupling

Input Common-Mode Range, VCMR

1.3

1.8

With 200 mV p-p signal applied; dc-coupled

Input Sensitivity, Single-Ended

150

mV p-p

CLK ac-coupled; CLK ac-bypassed to RF ground

Input Resistance

3.9

4.7

5.7

kΩ

Self-biased

Input Capacitance

1 Below about 1 MHz, the input should be dc-coupled. Care should be taken to match VCM.

CLOCK OUTPUTS

Table 4.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

LVDS CLOCK OUTPUTS

Termination = 100 Ω across differential pair

OUT0, OUT1, OUT2, OUT3, OUT4, OUT5,

OUT6, OUT7, OUT8, OUT9, OUT10, OUT11

Differential (OUT, OUT)

Output Frequency, Maximum

800

MHz

The AD9522 outputs toggle at higher frequencies,

but the output amplitude may not meet the VOD

specification

Output Differential Voltage, VOD

247

360

454

VOH − VOL measurement across a differential pair

at the default amplitude setting with output

driver not toggling; see Figure 21 for variation

over frequency

Delta VOD

This is the absolute value of the difference

between VOD when the normal output is high vs.

when the complementary output is high

Output Offset Voltage, VOS

1.125

1.25

1.375

(VOH + VOL)/2 across a differential pair

Delta VOS

This is the absolute value of the difference

between VOS when the normal output is high vs.

when the complementary output is high

Short-Circuit Current, ISA, ISB

Output shorted to GND

CMOS CLOCK OUTPUTS

OUT0A, OUT0B, OUT1A, OUT1B, OUT2A,

OUT2B, OUT3A, OUT3B, OUT4A, OUT4B,

OUT5A, OUT5B, OUT6A, OUT6B, OUT7A,

OUT7B, OUT8A, OUT8B, OUT9A, OUT9B,

OUT10A, OUT10B, OUT11A, OUT11B

Single-ended; termination = 10 pF

Output Frequency

250

MHz

See Figure 22

Output Voltage High, VOH

VS − 0.1

@ 1 mA load

Output Voltage Low, VOL

0.1

@ 1 mA load

Output Voltage High, VOH

2.7

@ 10 mA load

Output Voltage Low, VOL

0.5

@ 10 mA load

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