LMX2485E EVAL National Semiconductor, LMX2485E EVAL Datasheet - Page 6

• 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: -

RF PLL Phase Noise with different Delta Sigma Modulator Order
L M X 2 4 8 5 E
E V A L U A T I O N
6
FM = 2 (2
(FM =2 is the recommended setting)
Phase Noise measured at 49.2 MHz
CP gain = 0.76 mA (8X) (default setting)
Fraction Compensation set to 1/5
Dithering disabled.
In these three plots, you will note that PN does not
vary.
FM = 3 (3
Phase Noise measured at 49.2 MHz
CP gain = 0.76 mA (8X) (default setting)
Fraction Compensation set to 1/5
Dithering disabled.
FM=0 (4
Phase Noise measured at 49.2 MHz
CP gain = 0.76 mA (8X) (default setting)
Fraction Compensation set to 1/5
Dithering disabled.
B O A R D
th
nd
rd
order delta sigma modulator)
order delta sigma modulator)
order delta sigma modulator)
O P E R A T I N G
I N S T R U C T I O N S