STC5420 Datasheet, PDF (62/70 Pages) Connor-Winfield Corporation – Synchronous Clock for SETS

Noise Transfer Functions
STC5420
Synchronous Clock for SETS
Data sheet
User may write to register Loop Bandwidth to set the PLL loop bandwidth for each timing generator. The
noise transfer function of the PLL filter is determined by the loop bandwidth. Figure 17 shows the noise transfer
functions as the loop bandwidth vary from 100mHz to 103Hz.
20 dB
0 dB
-20 dB
-40 dB
-60 dB
0.10 Hz
0.21 Hz
0.42 Hz
0.84 Hz
1.7 Hz
3.4 Hz
6.7 Hz
13 Hz
27 Hz
52 Hz
103 Hz
-3dB
-80 dB
10 mHz
100 mHz
1 Hz
10 Hz
Noise Frequency
100 Hz
Figure 17: Noise Transfer Functions
1 kHz
10 kHz
Page 62 of 70
Rev:2.0
© Copyright the Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
Date: September 28, 2011