Highly-integrated low-noise wideband frequency synthesizer

A low-noise wideband frequency synthesizer that integrates a delta-sigma fractional N PLL, multiple core VCO, programmable output divider and two differential output buffers - the Texas Instruments (TI) LMX2581 is now available from Farnell element14. A highly programmable device that enables the user to optimize performance, the LMX2581 wideband frequency synthesizer includes VCO frequency range from 1880 to 3760MHz, superior noise immunity and consistent performance. In fractional mode, the denominator and modulator order are programmable and can be configured with dithering. The user can directly specify a VCO core or bypass the internal VCO altogether. Additional features include power down, Fastlock, auto mute and lock detection, with a simple 3-wire interface and read-back feature also available.