EVAL-ADN2814EB Analog Devices Inc, EVAL-ADN2814EB Datasheet - Page 13

• Manufacturer Part Number: EVAL-ADN2814EB
• Manufacturer: Analog Devices Inc

Specifications of EVAL-ADN2814EB

• Lead Free Status / Rohs Status: Supplier Unconfirmed

JITTER SPECIFICATIONS
The ADN2814 CDR is designed to achieve the best bit-
error-rate (BER) performance and to exceed the jitter
transfer, generation, and tolerance specifications proposed
for SONET/SDH equipment defined in the Telcordia
Technologies specification.
Jitter is the dynamic displacement of digital signal edges from
their long-term average positions, measured in unit intervals
(UI), where 1 UI = 1 bit period. Jitter on the input data can
cause dynamic phase errors on the recovered clock sampling
edge. Jitter on the recovered clock causes jitter on the
retimed data.
The following sections briefly summarize the specifications of
jitter generation, transfer, and tolerance in accordance with the
Telcordia document (GR-253-CORE, Issue 3, September 2000)
for the optical interface at the equipment level and the
ADN2814 performance with respect to those specifications.
Jitter Generation
The jitter generation specification limits the amount of jitter
that can be generated by the device with no jitter and wander
applied at the input. For SONET devices, the jitter generated
must be less than 0.01 UI rms, and must be less than 0.1 UI p-p.
Jitter Transfer
The jitter transfer function is the ratio of the jitter on the output
signal to the jitter applied on the input signal vs. the frequency.
This parameter measures the limited amount of the jitter on an
input signal that can be transferred to the output signal (see
Figure 15).
Rev. A | Page 13 of 28
Jitter Tolerance
The jitter tolerance is defined as the peak-to-peak amplitude of
the sinusoidal jitter applied on the input signal, which causes a
1 dB power penalty. This is a stress test intended to ensure that
no additional penalty is incurred under the operating
conditions (see Figure 16).
0.1
15.00
1.50
0.15
ACCEPTABLE
RANGE
f
0
JITTER FREQUENCY (kHz)
Figure 16. SONET Jitter Tolerance Mask
JITTER FREQUENCY (kHz)
Figure 15. Jitter Transfer Curve
f
C
f
1
f
2
SLOPE = –20dB/DECADE
f
3
SLOPE = –20dB/DECADE
ADN2814
f
4