MK2069-03GI IDT, Integrated Device Technology Inc, MK2069-03GI Datasheet - Page 7

• Manufacturer Part Number: MK2069-03GI
• Description: IC VCXO CLK TRANSLATOR 56-TSSOP
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Synchronizerr

Specifications of MK2069-03GI

• Pll: Yes
• Input: LVCMOS
• Output: LVCMOS
• Number Of Circuits: 1
• Ratio - Input:output: 1:3
• Differential - Input:output: No/No
• Frequency - Max: 160MHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 3.15 V ~ 3.45 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 56-TSSOP
• Frequency-max: 160MHz
• Number Of Elements: 2
• Supply Current: 30mA
• Pll Input Freq (min): 1KHz
• Pll Input Freq (max): 27MHz
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: -40C to 85C
• Package Type: TSSOP
• Output Frequency Range: 2.5 to 160MHz
• Operating Supply Voltage (min): 3.15V
• Operating Supply Voltage (max): 3.45V
• Operating Temperature Classification: Industrial
• Pin Count: 56
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

C
For higher damping factors (> 1), calculate the value of C
based on a C
of 1. This will minimize baseband peaking and loop
instability that can lead to output jitter.
C
charge pump correction pulses. A C
will result in increased output phase noise at the phase
detector frequency due to this. In extreme cases where
Graph of Charge Pump Current vs. Value of R
Charge Pump Current, Example Settings from
Notes on Setting Charge Pump Current
The recommended range for the charge pump current is 25
IDT™ / ICS™ VCXO-BASED CLOCK TRANSLATOR WITH HIGH MULTIPLICATION 7
P
P
MK2069-03
VCXO-BASED CLOCK TRANSLATOR WITH HIGH MULTIPLICATION
establishes a second pole in the VCXO PLL loop filter.
also dampens VCXO input voltage modulation by the
C
P
480 k
400 k
Above Graph
=
5 M
3 M
2 M
1 M
R
SET
C
----- -
20
S
S
value that would be used for a damping factor
Charge Pump Current
100E-6
10E-6
1E-3
100E+3
125 A
255 A
300 A
25 A
42 A
65 A
(I
CP
)
P
value that is too low
R
P
SET
SET
1E+6
, ohms
input jitter is high, charge pump current is high, and C
small, the VCXO input voltage can hit the supply or ground
rail resulting in non-linear loop response.
The best way to set the value of C
response software available from ICS (please refer to the
following section). C
just starts affecting the passband peak.
Loop Filter Response Software
Online tools to calculate loop filter response can be found at
www.idt.com/?app=calculators&source=support_menu.
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 ICS, increasing charge pump current (I
both bandwidth and damping factor.
(external resistor)
A to 300 A. Below 25 A, loop filter charge leakage, due
Recommended Range
of Operation
P
should be increased in value until it
VCXO AND SYNTHESIZER
10E+6
P
MK2069-03
is to use the filter
CP
) increases
REV J 030906
P
is too