AD9558BCPZ datasheet(14/105 Pages) AD

14 / 105 page

AD9558

Data Sheet

Rev. C | Page 14 of 105

SERIAL PORT SPECIFICATIONS—I2C MODE

Table 16.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

SDA, SCL (AS INPUT)

Input Logic 1 Voltage

0.7 × DVDD3

Input Logic 0 Voltage

0.3 × DVDD3

Input Current

−10

+10

µA

For VIN = 10% to 90% DVDD3

Hysteresis of Schmitt Trigger Inputs

0.015 × DVDD3

Pulse Width of Spikes That Must Be Suppressed by

the Input Filter (tSP)

SDA (AS OUTPUT)

Output Logic 0 Voltage

0.4

IO = 3 mA

Output Fall Time from VIHmin to VILmax

20 + 0.1 × Cb1

250

10 pF ≤ Cb ≤ 400 pF

TIMING

SCL Clock Rate

400

kHz

Bus-Free Time Between a Stop and Start

Condition (tBUF)

1.3

µs

Repeated Start Condition Setup Time (tSU; STA)

0.6

µs

Repeated Hold Time Start Condition (tHD;STA)

0.6

µs

After this period, the first clock

pulse is generated

Stop Condition Setup Time (tSU; STO)

0.6

µs

Low Period of the SCL Clock (tLOW)

1.3

µs

High Period of the SCL Clock (tHIGH)

0.6

µs

SCL/SDA Rise Time (tR)

20 + 0.1 × Cb1

300

SCL/SDA Fall Time (tF)

20 + 0.1 × Cb1

300

Data Setup Time (tSU; DAT)

100

Data Hold Time (tHD; DAT)

100

Capacitive Load for Each Bus Line (Cb)1

400

Cb is the capacitance (pF) of a single bus line.

JITTER GENERATION

Jitter generation (random jitter) uses 49.152 MHz crystal for system clock input.

Table 17.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

JITTER GENERATION

System clock doubler enabled;

high phase margin mode enabled;

0x07; Register 0x0400 = 0x81;

in cases where multiple driver types are

listed, both driver types were tested at

those conditions, and the one with higher

jitter is quoted, although there is usually

not a significant jitter difference between

the driver types

fREF = 19.44 MHz; fOUT = 622.08 MHz; fLOOP = 50 Hz;

HSTL Driver

Bandwidth: 5 kHz to 20 MHz

304

fs rms

Bandwidth: 12 kHz to 20 MHz

296

fs rms

Bandwidth: 20 kHz to 80 MHz

300

fs rms

Bandwidth: 50 kHz to 80 MHz

266

fs rms

Bandwidth: 16 MHz to 320 MHz

185

fs rms

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