Datasheet

November 2013 LMK3806 Evaluation Board SNAU075A 13
Copyright © 2013, Texas Instruments Incorporated
Connector Name
Signal Type,
Input/Output
Description
OSCout0, OSCout0*,
OSCout1, OSCout1*
Analog,
Output
Buffered outputs of OSCin port.
The output terminations on the evaluation board are
shown below, the output type selected by default in
CodeLoader is indicated by an asterisk (*):
OSC output pair
Default Board
Termination
OSCout0 LVPECL* (fixed)
OSCout1 LVPECL* (fixed)
Only OSCout0 has a programmable LVDS,
LVPECL, or LVCMOS output buffer. The OSCout0
buffer type can be selected in CodeLoader on the
Clock Outputs tab via the OSCout0_TYPE control.
OSCout1 has LVPECL buffer only but has
programmable swing amplitude.
Both OSCout pairs are AC-coupled to allow safe
testing with RF test equipment.
The OSCout0 and OSCout1 outputs are source-
terminated using 240-ohm resistors.
If OSCout0 is programmed as LVCMOS, each
output can be independently configured (normal,
inverted, inverted, and off/tri-state).
Vcc
Power,
Input
Main power supply input for the evaluation board.
A 3.9 V DC power source applied to this SMA will,
by default, source the onboard LDO regulators that
power the inner layer planes that supply the
LMK03806B.
The LMK03806B contains internal voltage
regulators for the VCO, PLL and other internal
blocks. The clock outputs do not have an internal
regulator, so a clean power supply with sufficient
output current capability is required for optimal
performance.
On-board LDO regulators and 0  resistor options
provide flexibility to supply and route power to
various devices. See schematics for more details.