LMX2485E EVAL National Semiconductor, LMX2485E EVAL Datasheet - Page 8

• Manufacturer Part Number: LMX2485E EVAL
• Description: BOARD EVALUATION LMX2485E
• Manufacturer: National Semiconductor
• Series: PLLatinum™r

Specifications of LMX2485E EVAL

• Main Purpose: Timing, Frequency Synthesizer
• Utilized Ic / Part: LMX2485E
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -

L M X 2 4 8 5 E
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
RF PLL Fractional Spurs with Different CP Currents
Fractional Spurs
measured at 49.2 MHz
CP gain = 0.76 mA (8X)
(default setting)
FM=2
Fraction Compensation
set to 1/5
Dithering disabled
An observation is when
the charge pump current
is doubled; the spurs will
increase by
approximately 6 dB.
Fractional Spurs
measured at 49.2 MHz
CP gain = 1.52 mA (16X)
FM=2
Fraction Compensation
set to 1/5
Dithering disabled
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