Datasheet
User’s Guide
March 2012
March 2012 SNLU098 LMK00101 Users Guide 3
2.1 Quick Start Description
The LMK00101 EVK allows full verification of the device functionality and performance specifications. To quickly
set up and operate the board with basic equipment, refer to the quick start procedure below and test setup shown
in Figure 1.
1. Verify the output mode control switches, S1[1:4], match the states shown in Table 2 to reflect the default output
clock interfaces configured on the EVK.
Table 2: Default Clock Output Modes / Interfaces
SW Position/Name
SW State
S1[1] / SEL1
0 (OFF)
S1[2] / SEL0
1 (ON)
S1[3] / OE
1 (OFF)
S1[4] / NC
Unused
2. Connect the Vdd SMA from the board to a 3.3 V source. This powers the not output portions of the LMK00101.
3. Connect the VddCLKout SMA from the board to a 3.3 V source. This powers the output drivers of the
LMK00101
4. Set the desired clock input using the input selection control switches, S1[1:2], per Table 3. A differential clock
source can be connected to SMAs CLKin0/0* or CLKin1/1*.
Table 3. Input Selection (0=SW OFF, 1=SW ON)
Selected Input
Default Input Mode
S1[1]
CLKin_Sel0
State
S1[2]
CLKin_Sel1
State
CLKin0/0*
Differential clock
0
0
CLKin1/1*
Differential clock
0
1
OSCin
Select OSCin
1
Don’t care
Note: CLKin0/0* and CLKin1/1* paths are configured by default to receive a differential clock as the input. The
SMA inputs are DC coupled to the device inputs and terminated with 100 ohms differential. Refer to the Clock
Inputs section to configure the EVK for a single-ended input.
5. Connect and measure any clock output SMA labeled CLKoutX to an oscilloscope or other test instrument using
SMA cable(s). The output clock will be level-translated/buffered copy of the selected clock input or crystal
oscillator. Note: All output clocks are AC-coupled to the SMA connectors to ensure safe use with RF
instruments.
Note: Switching noise from one or more un-terminated outputs may impair the signal quality of the measured
output(s). To minimize switching noise and EMI, properly terminate any unused output path using an SMA
load or the component options near the SMA outputs, or alternatively, remove the 0-ohm series resistor
nearest the unused output pin.