SNAS826 April 2022 LMK6C
High-Q resonant tank of BAW die is complimented with an ultra-low noise oscillator on a base die, designed in CMOS process node. Temperature variations of oscillation frequency are continuously monitored by a co-located precision temperature sensor. Correction for frequency is done using an advance signal processing algorithm which runs continuously in the background while making use of per part calibration coefficients, stored in NVM, to compensate frequency within ±10 ppm. A very low jitter, low power fractional output divider (FOD) in the frequency correction path allows necessary compensation with minimum impact to the phase jitter while generating a per-programmed output frequency clock. The output driver is capable of providing both single-ended LVCMOS and differential LVPECL and LVDS output formats. Finally, a small power-reset-clock management system consisting of several low noise LDOs and digital controller makes sure noise sensitive modules work with enough isolation while maintaining output clock fidelity.