STC5428 Datasheet, PDF (61/66 Pages) Connor-Winfield Corporation – Synchronous Clock for SETS

Noise Transfer Functions
STC5428
Synchronous Clock for SETS
DATASHEET
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 11 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 11: Noise Transfer Functions
1 kHz
10 kHz
Page 61 of 66
Preliminary
Rev: 0.2
© Copyright the Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
Date: April 3, 2014