SKY72300-362

DATA SHEET SKY72300-362: Spur-Free, 2.1 GHz Dual Fractional-N Frequency Synthesizer Applications General purpose RF systems 2.5G and 3G wireless infrastructure Broadband wireless access www.DataSheet4U.com Direct digital modulation 3 V operation 5 V output to loop filter QFN (24-pin, 4 x 4 mm) Pb-free (MSL3, 260 °C per JEDEC JSTD-020) package Low bit rate wireless telemetry Instrumentation L-band receivers Satellite communications Description Skyworks SKY72300-362 direct digital modulation fractional-N frequency synthesizer provides ultra-fine frequency resolution, fast switching speed, and low phase-noise performance. This synthesizer is a key building block for high-performance radio system designs that require low power and fine step size. The ultra-fine step size of less than 100 Hz allows this synthesizer to be used in very narrowband wireless applications. With proper temperature sensing or through control channels, the synthesizer’s fine step size can compensate for crystal oscillator or Intermediate Frequency (IF) filter drift. As a result, crystal oscillators or crystals can replace temperature-compensated or ovenized crystal oscillators, reducing parts count and associated component cost. The device’s fine step size can also be used for Doppler shift corrections. The SKY72300-362 has a phase noise floor of –90 dBc/Hz up to 2.1 GHz operation as measured inside the loop bandwidth. This is permitted by the on-chip low noise dividers and low d...