MK2059-01SILF IDT, Integrated Device Technology Inc, MK2059-01SILF Datasheet - Page 5

• Manufacturer Part Number: MK2059-01SILF
• Description: IC VCXO CLK JITTER ATTEN 20-SOIC
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Frequency Translatorr

Specifications of MK2059-01SILF

• Pll: Yes
• Input: Clock
• Output: CMOS
• Number Of Circuits: 1
• Ratio - Input:output: 2:1
• Differential - Input:output: No/No
• Frequency - Max: 25.92MHz
• Divider/multiplier: No/Yes
• Voltage - Supply: 3.15 V ~ 3.45 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC
• Frequency-max: 24.704MHz
• Number Of Elements: 1
• Supply Current: 15mA
• Pll Input Freq (min): 13.5MHz
• Pll Input Freq (max): 27MHz
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: -40C to 85C
• Package Type: SOIC
• Output Frequency Range: 1.544 to 25.92MHz
• Operating Supply Voltage (min): 3.15V
• Operating Supply Voltage (max): 3.45V
• Operating Temperature Classification: Industrial
• Pin Count: 20
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

A “normalized” PLL loop bandwidth may be calculated as
follows:
The “normalized” bandwidth equation above does not take
into account the effects of damping factor or the second
pole. However, it does provide a useful approximation of
filter performance.
The loop damping factor is calculated as follows:
Where:
As a general rule, the following relationship should be
maintained between components C
filter:
Charge Pump Current Table
IDT™ VCXO-BASED FRAME CLOCK FREQUENCY TRANSLATOR
MK2059-01
VCXO-BASED FRAME CLOCK FREQUENCY TRANSLATOR
Damping Factor
NBW
C
P
1.4 M
R
I
C
680 k
540 k
120 k
=
CP
R
Z
1
=
(refer to Charge Pump Current Table, below)
SET
= Value of capacitor C
C
----- -
= Value of resistor in loop filter (Ohms)
20
= Charge pump current (amps)
N = Crystal multiplier shown in the above table
R
-----------------------------------------
S
S
Charge Pump Current
I
CP
N
=
575
R
100 A
10 A
20 A
25 A
(I
S
CP
)
------------------------------------------ -
625
1
in loop filter (Farads)
1
and C
I
N
CP
2
C
in the loop
S
5
Special considerations must be made in choosing loop
components C
found on the IDT web site.
Series Termination Resistor
Clock output traces over one inch should use series
termination. To series terminate a 50 trace (a commonly
used trace impedance), place a 33 resistor in series with
the clock line, as close to the clock output pin as possible.
The nominal impedance of the clock output is 20 . (The
optional series termination resistor is not shown in the
External Component Schematic.)
Decoupling Capacitors
As with any high performance mixed-signal IC, the
MK2059-01 must be isolated from system power supply
noise to perform optimally.
Decoupling capacitors of 0.01µF must be connected
between each VDD and the PCB ground plane. To further
guard against interfering system supply noise, the
MK2059-01 should use one common connection to the PCB
power plane as shown in the diagram on the next page. The
ferrite bead and bulk capacitor help reduce lower frequency
noise in the supply that can lead to output clock phase
modulation.
Recommended Power Supply Connection for
Optimal Device Performance
B ulk D ecoupling C apacitor
C onnection to 3.3V
(such as 1 F Tantalum )
0.01
P ow er P lane
S
F D ecoupling C apacitors
and C
P
. These recommendations can be
Ferrite
Bead
VCXO AND SYNTHESIZER
MK2059-01
V D D P in
V D D P in
V D D P in
REV H 051310