LMX2485 Overview
The LMX2485 device is a low power, high performance delta-sigma fractional-N PLL with an auxiliary integer-N PLL. The device is fabricated using Texas Instruments' advanced process. With delta-sigma architecture, fractional spurs at lower offset frequencies are pushed to higher frequencies outside the loop bandwidth.
LMX2485 Key Features
- 1 Quadruple Modulus Prescaler for Lower Divides
- RF PLL: 8/9/12/13 or 16/17/20/21
- IF PLL: 8/9 or 16/17
- Advanced Delta-Sigma Fractional pensation
- 12-Bit or 22-Bit Selectable Fractional Modulus
- Up to 4th Order Programmable Delta-Sigma Modulator
- Features for Improved Lock Time
- Fastlock / Cycle Slip Reduction With Integrated Time-Out Counter Which Requires Only a Single-Word Write
- Wide Operating Range
- LMX2485 RF PLL: 500 MHz to 3.0 GHz
