LMK03200EVAL National Semiconductor, LMK03200EVAL Datasheet - Page 10

• Manufacturer Part Number: LMK03200EVAL
• Description: BOARD EVALUATION LMK03200
• Manufacturer: National Semiconductor

Specifications of LMK03200EVAL

• Main Purpose: Timing, Clock Conditioner
• Embedded: No
• Utilized Ic / Part: LMK03200
• Primary Attributes: 3 LVDS & 5 LVPECL Outputs, Integrated PLL & VCO
• Secondary Attributes: 3.15 V ~ 3.45 V Supply
• Silicon Manufacturer: National
• Silicon Core Number: LMK03200
• Kit Application Type: Clock & Timing
• Application Sub Type: Precision Clock Conditioner
• Kit Contents: Board, Cable
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Board Information
OSCin
By default the board is configured to use the on-board crystal oscillator. It is also possible to use the
board with a single ended or differential reference source at the OSCin port. Below are several
possible configurations for driving OSCin.
Fout
Fout allows direct access to the internal VCO before the clock distribution section. The EN_Fout bit
must be selected to enable Fout. A 3 dB pad is placed on R49, R51, and R139.
Loop Filter
R69 and R72 form a “resistor switch” which allows either one of two different loop filters to be
selected. The second loop filter on the bottom of the board is unpopulated by factory.
Loop Filter
Loop Filter #1
[default]
Loop Filter #2
OSCin using on board crystal oscillator [default]
0 ohm
39 ohm
51 ohm
0.1 uF
Open
Differential OSCin setup
0 ohm
100 ohm
0.1 uF
Open
Single ended OSCin setup
0 ohm
51 ohm
0.1 uF
Open
L M K 0 3 2 0 0
Resistor
Switch
R69 Shorted
R72 Shorted
R4, R12, R14 [power to crystal oscillator], R15
R3 [can also be 0 ohm – depends on oscillator output power, 39 ohms
to be a voltage divider]
R22
C6, C10 (C9 is a 0.1 uF 0402 cap which may be moved to C10)
C9
R6, R7, R8, R10, R11, R16, R19, R20, R21, R23, R25, R64
R15, R16, R20, R25
R19
C6, C9 (C10 is a 0.1 uF 0402 cap which may be moved to C9)
C10
R10, R11, R12, R21, R22, R23
R14 [remove power from crystal oscillator for noise reasons]
R15, R16
R22
C6, C10 (C9 is a 0.1 uF 0402 cap which may be moved to C10)
C9
R10, R12, R19
R14 [remove power from crystal oscillator for noise reasons]
E V A L U A T I O N
Loop Filter
Components
C1, C2, C2p, R2
C1_AUX, C2_AUX,
C2p_AUX, R2_AUX
10
B O A R D
O P E R A T I N G
Default Loop
Bandwidth
57.7 kHz
N/A
I N S T R U C T I O N S