mk2069-02 Integrated Device Technology, mk2069-02 Datasheet - Page 8

• Manufacturer Part Number: mk2069-02
• Description: Vcxo-based Clock Jitter Attenuator And Translator
• Manufacturer: Integrated Device Technology

Charge Pump Current, Example Settings from
Notes on Setting Charge Pump Current
The recommended range for the charge pump current is 25
to PCB or capacitor leakage, can become a problem. This
loop filter leakage can cause locking problems, output clock
cycle slips, or low frequency phase noise.
As can be seen in the loop bandwidth and damping factor
equations or by using the filter response software available
from IDT, increasing charge pump current (I
both bandwidth and damping factor.
IDT® VCXO-BASED CLOCK JITTER ATTENUATOR AND TRANSLATOR
A to 300 A. Below 25 A, loop filter charge leakage, due
MK2069-02
VCXO-BASED CLOCK JITTER ATTENUATOR AND TRANSLATOR
480 k
400 k
Above Graph
5 M
3 M
2 M
1 M
R
SET
Charge Pump Current
125 A
255 A
300 A
25 A
42 A
65 A
(I
CP
)
CP
) increases
8
VCXO Gain (K
Loop Filter Capacitor Type
Loop filters must use specific types of capacitors.
Recommendations for these capacitors can be found at
www.idt.com/?app=calculators&source=support_menu.
6 0 0 0
5 0 0 0
4 0 0 0
3 0 0 0
2 0 0 0
1 0 0 0
O
) vs. XTAL Frequency
1 0
C ry s ta l F re q u e n c y , M H z
1 5
VCXO AND SYNTHESIZER
2 0
MK2069-02
2 5
REV G 050203
3 0