LMX2525 is a highly integrated, high performance, low power frequency synthesizer system optimized for dual-band Japan PDC mobile handsets.
The LMX2525 is a highly integrated, high-performance, low-power frequency synthesizer system optimized for dual-band Japan PDC mobile handsets. It utilizes a proprietary digital phase-locked loop technique to generate stable, low-noise local oscillator signals for up and down conversion in wireless communications devices. The system includes dual voltage-controlled oscillators (VCOs) for the upper and lower Japan PDC frequency bands, an integrated loop filter, and a fractional-N RF PLL based on a delta-sigma modulator.
| Operating Supply Voltage | 2.5 V to 3.3 V |
|---|---|
| Package Type | 24-pin leadless leadframe package (LLP) |
| Supply Current (PDC800 Mode) | 10 mA at 2.8 V |
| Lock Time (High Speed Mode) | 300 ps |
| Frequency Resolution | Down to 20 kHz |
| Supported Reference Frequencies | 12.6 MHz, 14.4 MHz, 25.2 MHz, and 26.0 MHz |
| RF1 VCO Frequency Range (PDC1500) | 1270.22 MHz to 1394.95 MHz |
| RF2 VCO Frequency Range (PDC800) | 633.15 MHz to 768.00 MHz |
| Phase Noise (@ 25 kHz offset) | -95 dBc/Hz |
The LMX2525 supports two frequency bands: PDC1500 and PDC800.
Serial data is transferred via a three-wire MICROWIRE interface (DATA, LE, CLK).
The supply current is 10 mA at 2.8 V when operating in PDC800 mode.