LMX2571NJKR

The LMX2571NJKR from Texas Instruments is a wideband PLLatinum RF synthesizer designed for high-performance applications. It integrates a delta-sigma fractional N PLL, multiple core voltage-controlled oscillators (VCOs), and programmable output dividers.

This device offers a continuous output frequency range from 10 MHz to 1344 MHz, with a maximum frequency of 1.344 GHz. It features FSK modulation, integer-boundary spurs (IBS) removal, and an integrated VCO. The normalized PLL phase noise is -231 dBc/Hz, and the 1/f noise at a 10-kHz offset from a 1-GHz carrier is -124 dBc/Hz. It also provides low phase noise and spurs of -123 dBc/Hz at a 12.5 kHz offset and -145 dBc/Hz at a 1 MHz offset, both at a 480 MHz carrier.

The LMX2571NJKR operates with a voltage range of 3.15V to 3.45V and has a typical current consumption of 39 mA in synthesizer mode with the internal VCO. It is available in a 36-WQFN (6x6 mm) package and is designed for surface mount applications. The operating temperature range is -40°C to 85°C.

Key features include a 24-bit fractional-N delta sigma modulator, direct digital FSK modulation, and options for one TX/RX output or two fanout outputs. It supports crystal, XO, or differential reference clock inputs.