The LMX2531 is a low-power, high-performance frequency synthesizer system which includes
a fully integrated delta-sigma PLL and VCO with fully integrated tank circuit. The third and fourth
poles are also integrated and adjustable. Ultra-low noise and high-precision LDOs are integrated
for the PLL and VCO, which yield higher supply-noise immunity and more consistent performance. When
combined with a high-quality reference oscillator, the LMX2531 device generates very stable,
low-noise local-oscillator signals for up and down conversion in wireless communication devices.
The LMX2531 device is a monolithic integrated circuit, fabricated in an advanced BiCMOS process.
Several different versions of this product accommodate different frequency bands.
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