DS21610 3.3V/5V Clock Rate Adapter

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3. OUTPUT JITTER

Table 3-A shows the output jitter specifications for 2.048MHz (or 4.096MHz) to 1.544MHz conversions (SEL = 1)

and 1.544MHz to 2.048MHz (or 4.096MHz) conversions (SEL = 0).

Table 3-A. Output Jitter Specifications, CLKOUT1 = 1.544MHz

FREQUENCY BAND

TR62411

SPECIFICATION

TYP

MAX

UNITS

No bandlimiting

TR62411

0.010

0.020

10Hz–40kHz

TR62411

0.005

0.010

8kHz–40kHz

TR62411

0.006

0.012

Table 3-B. Output Jitter Specifications, CLKOUT1 = 2.048MHz

FREQUENCY BAND

G.823

SPECIFICATION

TYP

MAX

UNITS

20Hz–100kHz

1.5

0.018

0.035

18kHz–100kHz

0.2

0.012

0.025

3.1 Jitter Transfer

Figure 3-1 and Figure 3-2 show jitter transfer for 2.048MHz-to-1.544MHz conversions and vice versa.

Figure 3-1. Nominal Jitter Transfer (1.544MHz CLKIN to 2.048MHz CLKOUT1)

NOTE: THE TYPICAL PEAK JITTER GAIN OF THE DS21610 IS ABOUT 1.6 FOR CONVERSION FROM T1 TO E1. THE

TYPICAL PEAK-JITTER GAIN OF THE LEVEL ONE DEVICE IS ABOUT 1.1. HOWEVER, THE JITTER GAIN FOR THE

DS21610 PEAKS IN THE 4kHz TO 8kHz RANGE, WHEREAS THE PEAK JITTER GAIN FOR THE LXP610 SPANS A

GREATER FREQUENCY RANGE (20kHz TO 40kHz).

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

1.60

1.80

2.00

0

5

10

15

20

25

30

35

40

JITTER FREQUENCY (kHz)