TI: wideband RF phase-locked loops with integrated voltage-controlled oscillators
Texas Instruments introduced the industry’s highest-performance phase-locked loops with integrated voltage-controlled oscillators. Delivering the lowest phase-noise performance in the industry, the LMX2582 and LMX2592’s single-chip architecture helps designers achieve a level of performance previously possible only through several discrete devices. These new wideband devices support output frequencies of up to 9.8 GHz, allowing a single device to support various frequency bands in end applications including test and measurement, defense, microwave backhaul, satellite, and wireless communications equipment.
With 1.8-GHz carrier open-loop VCO phase noise of -144.5 dBc/Hz at 1-MHz offset, the devices are the industry’s first PLLs with integrated VCO to meet the multicarrier wireless Global System for Mobile (GSM) Communication standard. Featuring the industry’s lowest normalized PLL noise floor at -231 dBc/Hz and the highest phase-detector frequency of 400 MHz, the devices enable a very low integrated noise of 47 fs RMS jitter. The devices meet the low noise floor requirements for clocking high speed data converters like TI’s industry-leading RF sampling ADC12J4000. Eliminating the need for multiple narrowband devices, the LMX2592 supports 20 MHz to 9.8 GHz, and the LMX2582 supports up to 5.5 GHz, allowing designers to use one PLL for a range of wideband system designs. The devices’ spur-removal technique can eliminate integer boundary spurs, enabling designers to improve channel density of their designs. Low-dropout regulators manage power-supply variations and improve noise immunity. A channel divider lets designers configure up to two differential outputs.
Engineers can quickly and easily evaluate the performance of the LMX2592 and LMX2582 with the evaluation modules LMX2592EVM and LMX2582EVM.