AD9512BCPZ datasheet(4/48 Pages) AD

4 / 48 page

AD9512

Rev. A | Page 4 of 48

SPECIFICATIONS

Typical (Typ) is given for VS = 3.3 V ± 5%; TA = 25°C, RSET = 4.12 kΩ, unless otherwise noted. Minimum (Min) and Maximum (Max)

values are given over full VS and TA (−40°C to +85°C) variation.

CLOCK INPUTS

Table 1.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

CLOCK INPUTS (CLK1, CLK2)1

Input Frequency

1.6

GHz

Input Sensitivity

1502

mV p-p

Jitter performance can be improved with higher slew

rates (greater swing).

Input Level

V p-p

Larger swings turn on the protection diodes and can

degrade jitter performance.

Input Common-Mode Voltage, VCM

1.5

1.6

1.7

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

CLK2 ac-coupled; CLK2B ac bypassed to RF ground.

Input Resistance

4.0

4.8

5.6

kΩ

Self-biased.

Input Capacitance

1 CLK1 and CLK2 are electrically identical; each can be used as either differential or single-ended input.

2 With a 50 Ω termination, this is −12.5 dBm.

3 With a 50 Ω termination, this is +10 dBm.

CLOCK OUTPUTS

Table 2.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

LVPECL CLOCK OUTPUTS

Termination = 50 Ω to VS − 2 V

OUT0, OUT1, OUT2; Differential

Output level 3Dh (3Eh) (3Fh)<3:2> = 10b

Output Frequency

1200

MHz

See Figure 14

Output High Voltage (VOH)

VS − 1.22

VS − 0.98

VS − 0.93

Output Low Voltage (VOL)

VS − 2.10

VS − 1.80

VS − 1.67

Output Differential Voltage (VOD)

660

810

965

LVDS CLOCK OUTPUTS

Termination = 100 Ω differential; default

OUT3, OUT4; Differential

Output level 40h (41h)<2:1> = 01b

3.5 mA termination current

Output Frequency

800

MHz

See Figure 15

Differential Output Voltage (VOD)

250

360

450

Delta VOD

Output Offset Voltage (VOS)

1.125

1.23

1.375

Delta VOS

Short-Circuit Current (ISA, ISB)

Output shorted to GND

CMOS CLOCK OUTPUTS

OUT3, OUT4

Single-ended measurements;

B outputs: inverted, termination open

Output Frequency

250

MHz

With 5 pF load each output; see Figure 16

Output Voltage High (VOH)

VS − 0.1

@ 1 mA load

Output Voltage Low (VOL)

0.1

@ 1 mA load

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