LMK04800_14 datasheet(6/79 Pages) NSC

Part #	LMK04800

Description	Low-Noise Clock Jitter Cleaner with Dual Loop PLLs

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Manufacturer	NSC [National Semiconductor (TI)]

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L M K 0 4 8 X X

E V A L U A T I O N

B O A R D

O P E R A T I N G

I N S T R U C T I O N S

6

Default CodeLoader Modes for Evaluation Boards

CodeLoader saves the state of the selected LMK048xxB device when exiting the software. To

ensure a common starting point, the following modes listed in Table 3 may be restored by

clicking “Mode” and selecting the appropriate device configuration, as shown in Figure 2 in the

case of the LMK04808B device. Similar default modes are available for each LMK048xxB

device in CodeLoader. Choose a mode with CLKin0 for differential clock signal or CLKin1 for a

single ended signal.

Figure 2: Selecting a Default Mode for the LMK04808 Device

After restoring a default mode, press Ctrl+L to program the device. The default modes also

disable certain outputs, so make sure to enable the output under test to make measurements.

Table 3: Default CodeLoader Modes for LMK04808

Default CodeLoader Mode

Device Mode

CLKin

Frequency

OSCin

Frequency

122.88 MHz CLKin1, 122.88 MHz

VCXO

Dual PLL, Internal VCO

122.88 MHz

122.88 MHz CLKin1, Dual Loop 0-

delay, 122.88 MHz VCXO

Dual PLL, Internal VCO,

0-Delay with Internal

Feedback

122.88 MHz

122.88 MHz CLKin1, 122.88 MHz

VCXO

Dual PLL, Internal VCO,

PLL2 Crystal Oscillator

Enabled

122.88 MHz

20.48 MHz

122.88 MHz CLKin1, 122.88 MHz

VCXO

Dual PLL, Internal VCO

122.88 MHz

122.88 MHz CLKin1, Dual Loop 0-

delay, 122.88 MHz VCXO

Dual PLL, Internal VCO,

0-Delay with Internal

Feedback

122.88 MHz

122.88 MHz CLKin1, 122.88 MHz

VCXO

Dual PLL, Internal VCO,

PLL2 Crystal Oscillator

Enabled

122.88 MHz

20.48 MHz

The next section outlines step-by-step procedures for using the evaluation board with the

LMK04808B. For boards with another part number, make sure to select the corresponding part

number under the “Device” menu.

Similar Part No. - LMK04800_14

Manufacturer	Part #	Datasheet	Description
Texas Instruments	LMK04800	985Kb / 91P	[Old version datasheet] Low-Noise Clock Jitter Cleaner with Dual Loop PLLs

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LMK04800 Datasheet(PDF) 6 Page - National Semiconductor (TI)

LMK04800 Datasheet(HTML) 6 Page - National Semiconductor (TI)

Similar Part No. - LMK04800_14

Similar Description - LMK04800_14

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