2.4GHz, Monolithic Voltage-Controlled Oscillator with Differential Outputs

First 2.4GHz VCO with Differential Output

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The MAX2753 is a self-contained voltage-controlled oscillator (VCO) intended for use in 2.4GHz radios that utilize a low-IF or zero-IF architecture. It combines a fully integrated oscillator and output buffer in a miniature 8-pin µMAX® package.

The inductor and varactor elements of the tank are integrated on-chip, greatly simplifying application of the part. The only required external components are a couple of supply bypass capacitors. The MAX2753 provides direct connection to the VCO tuning voltage input and the VCO buffer output. The tuning voltage input range is +0.4V to +2.4V, and the oscillator frequency tuning range is factory adjusted to provide guaranteed limits. The output signal is buffered by an amplifier stage (internally matched to 50Ω ) to provide higher output power and isolate the device from load impedance variations. In addition, the MAX2753 provides differential outputs.

The MAX2753 operates over a +2.7V to +5.5V supply voltage range. Internal regulation of the oscillator supply voltage eliminates the need for an external LDO regulator for the VCO. The MAX2753 also provides a digitally controlled shutdown mode to permit implementation of sophisticated power-supply management. In shutdown, the supply current is reduced to less than 1µA.
MAX2753: Typical Operating Circuit MAX2753: Typical Operating Circuit Enlarge+

Key Features

  • Guaranteed Frequency Tuning Range: 2400MHz to 2500MHz
  • Compatible with Low-IF or Zero-IF Radio Architectures
  • Differential Outputs
  • On-Chip Tank Circuit
  • Internally Matched Output Buffer Amplifier
  • 1µA Shutdown Mode
  • +2.7V to +5.5V Supply Voltage Range
  • Miniature 8-Pin µMAX Package


  • 2.4GHz Bluetooth® ISM Proprietary Radio
  • 802.11 FHSS WLAN
  • HomeRF

Technical Documents

Tutorial 5100 General Layout Guidelines for RF and Mixed-Signal PCBs
Product Reliability Reports: MAX2753.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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