The LMX2541 is an ultra low noise frequency synthesizer which integrates a high performance delta-sigma fractional N PLL, a VCO with fully integrated tank circuit, and an optional frequency divider. The PLL offers an unprecedented normalized noise floor of -225 dBc/Hz and can be operated with up to 104 MHz of phase-detector rate (comparison frequency) in both integer and fractional modes. The PLL can also be configured to work with an external VCO.
The LMX2541 integrates several low-noise, high precision LDOs and output driver matching network to provide higher supply noise immunity and more consistent performance, while reducing the number of external components. When combined with a high quality reference oscillator, the LMX2541 generates a very stable, ultra low noise signal
| LMX2531 | LMX2541 | TRF3765 | |
| Operating Frequency Range (Min) (MHz) | 300 | ||
| Operating Frequency Range (Max) (MHz) | 4800 | ||
| Output Frequency (Min) (Mhz) | 553 | 32 | 300 |
| Output Frequency (Max) (Mhz) | 3132 | 4000 | 4800 |
| Divider Ratio | 1, 2, 4, 8 | ||
| Prescalers | 16/17/20/21 | 4/5 | |
| VCC (V) | 2.8 to 3.2 | 3.15 to 3.45 | 3.3 |
| Pin/Package | 32QFN | ||
| Approx. Price (US$) | 7.10 | 100u | ||
| Operating Temperature Range (C) | -40 to 85 | ||
| Lock Time (Typ) (us) | 60 |
Very Low RMS Noise and Spurs
| 培训内容 | 型号 | 软件/工具类型 |
| LMX2541 Evaluation Module | LMX2541EVM | 开发电路板/EVM |
