Si5321

10

Rev. 2.3

Table 4. AC Characteristics (PLL Performance Characteristics)

Parameter

Symbol

Test Condition

Min

Typ

Max Unit

Wander/Jitter at 800 Hz Bandwidth

(BWSEL[1:0] = 10 and BWBOOST = 0)

Jitter Tolerance (see Figure 7)

f=8 Hz

1000

—

—ns

f= 80 Hz

100

—

—ns

f= 800Hz

10

—

—ns

CLKOUT RMS Jitter Generation

FEC[2:0] = 000

12 kHz to 20 MHz

—

0.9

1.2

ps

50 kHz to 80 MHz

—

0.27

0.35

ps

CLKOUT RMS Jitter Generation

FEC[2:0] = 001, 010, 100, 101, 110, 111

12 kHz to 20 MHz

—

0.9

1.2

ps

50 kHz to 80 MHz

—

0.27

0.35

ps

CLKOUT Peak-Peak Jitter Generation

FEC[2:0] = 000

12 kHz to 20 MHz

—

7.6

11

ps

50 kHz to 80 MHz

—

3.6

10.0

ps

CLKOUT Peak-Peak Jitter Generation

FEC[2:0] = 001, 010, 100, 101, 110, 111

12 kHz to 20 MHz

—

6.7

9.2

ps

50 kHz to 80 MHz

—

3.0

10.0

ps

Jitter Transfer Bandwidth (see Figure 6)

BW = 800 Hz

—

800

—

Hz

Wander/Jitter Transfer Peaking

< 800 Hz

—

0.0

0.05

dB

Wander/Jitter at 1600 Hz Bandwidth

(BWSEL[1:0] = 10 and BWBOOST = 1)

Jitter Tolerance (see Figure 7)

f = 16 Hz

500

—

—

ns

f= 160Hz

50

—

—

ns

f = 1600 Hz

5

—

—

ns

CLKOUT RMS Jitter Generation

FEC[2:0] = 000

12 kHz to 20 MHz

—

.80

1.0

ps

50 kHz to 80 MHz

—

.25

.30

ps

CLKOUT Peak-Peak Jitter Generation

FEC[2:0] = 000

12 kHz to 20 MHz

—

6.4

10.0

ps

50 kHz to 80 MHz

—

3.0

5.0

ps

Jitter Transfer Bandwidth (see Figure 6)

BW = 1600 Hz

—

1600

—

Hz

Wander/Jitter Transfer Peaking

< 1600 Hz

—

0.0

0.05

dB

Notes:

1. Higher PLL bandwidth settings provide smaller clock output wander with temperature gradient.

2. For reliable device operation, temperature gradients should be limited to 10 °C/min.

3. Telcordia GR-1244-CORE requirements specify maximum phase transient slope during clock rearrangement in terms

of nanoseconds per millisecond. The equivalent ps/

µs unit is used here since the maximum phase transient magnitude

for the Si5321 (tPT_MTIE) never reaches one nanosecond.