MAX2751

Features:

. nGuaranteed Frequency Tuning Range
  MAX2750:2400MHz to 2500MHz (Zero IF)
  MAX2751:2120MHz to 2260MHz
         (240MHz to 280MHz IF)
  MAX2752:2025MHz to 2165MHz
         (335MHz to 375MHz IF)
. On-Chip Tank Circuit
. Internally Matched Output Buffer Amplifier
. Low-Current Shutdown Mode
. +2.7V to +5.5V Supply Voltage Range
. Miniature 8-Pin µMAX Package  


Application

802.11b DSSS WLAN
802.11 FHSS WLAN
Home RF
2.4GHz Bluetooth ISM Proprietary Radio 


Pinout

Specifications

VCCto GND................................................................-0.3V to +6V
TUNE, SHDN, BYP, OUT to GND......................-0.3V to (VCC+ 0.3V)
Continuous Power Dissipation (TA= +70°C)
8-Pin µMAX (derate 5.7mW/°C above TA= +70°C)..........457mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature.......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s)...................................+300°C 

Description

    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 MAX2750/MAX2751/MAX2752  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.