6
SNAU126A
LMK04906 Family: Low-Noise Clock Jitter with Dual Loop PLLs
Revised - December 2013
Copyright © 2013, Texas Instruments Incorporated
Quick Start
Full evaluation board instructions are downloadable from the LMK04906B device product folder
at
1. Connect a power supply voltage of
5 V
to the Vcc SMA connector. The onboard LP3878-
ADJ LDO regulator will output a low-noise 3.3 V supply to operate the device.
2. Connect a reference clock from a signal source to the CLKin1 SMA port. Use
125 MHz
for default. The reference frequency depends on the device programming.
3. Connect the uWire header to a PC USB port using the USB2ANY-uWIRE interface.
4. Program the device with a default mode using CodeLoader. Ctrl+L must be pressed at
least once to load all registers. Alternatively click menu “Keyboard Controls”
“Load
Device”. CodeLoader can be downloaded from
5. Measurements may be made on an active output clock port via its SMA connector.
Figure 1: Quick Start Diagram
125 MHz
(Default)