LMX2571

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LMX2571 SNAS654A – MARCH 2015 – REVISED JULY 2016 LMX2571 Low-Power, High-Performance PLLatinum™ RF Synthesizer with FSK Modulation 1 Features 1 Any Frequency from 10 MHz to 1344 MHz Low Phase Noise and Spurs – –123 dBc/Hz at 12.5 kHz Offset at 480 MHz – –145 dBc/Hz at 1 MHz Offset at 480 MHz – Normalized PLL Noise Floor of –231 dBc/Hz – Spurious Better Than –75 dBc/Hz New FastLock to Reduce Lock Time A Novel Technique to Remove Integer Boundary Spurs Integrated 5-V Charge Pump and Output Divider for External VCO Operation 2-, 4- and 8-Level or Arbitrary Level Direct Digital FSK Modulation One TX/RX Output or Two Fanout Outputs Crystal, XO or Differential Reference Clock Input Low Current Consumption – 39-mA Typical Synthesizer Mode (Internal VCO) – 9-mA Typical PLL Mode (External VCO) 24-Bit Fractional-N Delta Sigma Modulator 2 Applications Duplex Mode Digital Professional 2-Way Radio – dPMR, DMR, PDT, P25 Phase I Low Power Radio Communication Systems – Satcom Modem – Wireless Microphone – Propriety Wireless Connectivity Handheld Test and Measurement Equipment 3 Description The LMX2571 is a low-power, high-performance, wideband PLLatinum™ RF synthesizer that integrates a delta-sigma fractional N PLL, multiple core voltage-controlled oscillator (VCO), programmable output dividers and two output buffers. The VCO cores work up to 5.376 GHz resulting in continuous...