LMX2487E Datasheet (National Semiconductor) - High Performance Delta-Sigma Low Power Dual PLLatinum Frequency Synthesizers

LMX2487E, High Performance Delta-Sigma Low Power Dual PLLatinum Frequency Synthesizers

The LMX2487E is a low power, high performance delta-sigma fractional-N PLL with an auxiliary integer-N PLL.

It is fabricated using National Semiconductor’s advanced process.

With delta-sigma architecture, fractional spurs at lower offset frequencies are pushed to higher frequencies outside the loop

LMX2487E Features

* Quadruple Modulus Prescalers for Lower Divide Ratios

* RF PLL: 16/17/20/21 or 32/33/36/37

* IF PLL: 8/9 or 16/17 Advanced Delta Sigma Fractional Compensation

* 12 bit or 22 bit selectable fractional modulus

* Up to 4th order programmable delta-sigma modulator Features for Improved Lo