MAX2751

    The MAX2750/MAX2751/MAX2752 are self-contained volt-age-controlled oscillators (VCOs) intended for use in the2.4GHz to 2.5GHz ISM band. Each IC combines a fullyintegrated oscillator and output buffer in a miniature 8-pinµMAX package.
   The inductor and varactor elements of the tank are inte-grated on-chip, greatly simplifying application of the part.The only required external components are a couple ofsupply bypass capacitors. The IC provides direct connec-tion to the VCO tuning voltage input and the VCO bufferoutput. The tuning voltage input range is +0.4V to +2.4V,and the oscillator frequency tuning range is factory adjust-ed to provide guaranteed limits. The output signal isbuffered by an amplifier stage (internally matched to 50Ω)to provide higher output power and isolate the device fromload impedance variations.
   The MAX2750/MAX2751/MAX2752 operate over a +2.7Vto +5.5V supply voltage range. Internal regulation of theoscillator supply voltage eliminates the need for an exter-nal LDO regulator for the VCO. The IC also provides a dig-itally controlled shutdown mode to permit implementationof sophisticated power-supply management. In shutdown,the supply current is reduced to less than 1µA.