AD9557SLASHPCBZ datasheet(9/92 Pages) AD

9 / 92 page

Data Sheet

AD9557

Rev. A | Page 9 of 92

DISTRIBUTION CLOCK OUTPUTS

Table 10.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

HSTL MODE

Output Frequency

0.36

1250

MHz

Rise/Fall Time (20% to 80%)1

140

250

100 Ω termination across output pins

Duty Cycle

Up to fOUT = 700 MHz

Up to fOUT = 750 MHz

Up to fOUT = 1250 MHz

Differential Output Voltage Swing

700

950

1200

Magnitude of voltage across pins; output driver static

Common-Mode Output Voltage

700

870

960

Output driver static

LVDS MODE

Output Frequency

0.36

1250

MHz

Rise/Fall Time (20% to 80%)1

185

280

100 Ω termination across the output pair

Duty Cycle

Up to fOUT = 750 MHz

Up to fOUT = 800 MHz

Up to fOUT = 1250 MHz

Differential Output Voltage Swing

Balanced, VOD

247

454

Voltage swing between output pins; output driver

static

Unbalanced, ΔVOD

Absolute difference between voltage swing of

normal pin and inverted pin; output driver static

Offset Voltage

Common Mode, VOS

1.125

1.26

1.375

Output driver static

Common-Mode Difference, ΔVOS

Voltage difference between pins; output driver static

Short-Circuit Output Current

Output driver static

CMOS MODE

Output Frequency

1.8 V Supply

0.36

150

MHz

10 pF load

3.3 V Supply (OUT0)

Strong Drive Strength Setting

0.36

250

MHz

10 pF load

Weak Drive Strength Setting

0.36

MHz

10 pF load

Rise/Fall Time(20% to 80%)1

1.8 V Supply

1.5

10 pF load

3.3 V Supply

Strong Drive Strength Setting

0.4

0.6

10 pF load

Weak Drive Strength Setting

10 pF load

Duty Cycle

1.8 V Mode

10 pF load

3.3 V Strong Mode

10 pF load

3.3 V Weak Mode

10 pF load

Output Voltage High (VOH)

Output driver static; strong drive strength

AVDD3 = 3.3 V, IOH = 10 mA

AVDD3 − 0.3

AVDD3 = 3.3 V, IOH = 1 mA

AVDD3 − 0.1

AVDD3 = 1.8 V, IOH = 1 mA

AVDD − 0.2

Output Voltage Low (VOL)

Output driver static; strong drive strength

AVDD3 = 3.3 V, IOL = 10 mA

0.3

AVDD3 = 3.3 V, IOL = 1 mA

0.1

AVDD3 = 1.8 V, IOL = 1 mA

0.1

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