2.4GHz Monolithic Voltage-Controlled Oscillators

SiGe Monolithic VCOs Replace Modules in 2.4GHz ISM Applications

Please check latest availability status for a specific part variant.


The MAX2750/MAX2751/MAX2752 are self-contained voltage-controlled oscillators (VCOs) intended for use in the 2.4GHz to 2.5GHz ISM band. Each IC 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 IC 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.

The MAX2750/MAX2751/MAX2752 operate 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 IC 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.
MAX2750, MAX2751, MAX2752: Typical Operating Circuit MAX2750, MAX2751, MAX2752: Typical Operating Circuit Enlarge+

Key Features

  • Guaranteed 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


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

See parametric specs for VCOs (14)

Part NumberLO Driver OutputsPLL Driver OutputsRF Freq.
RF Freq.
(mm x mm)
minmaxminmaxSee Notes
MAX2750 NoYes24002500-3-32.7 to 5.511.33.0 x 4.9
$3.83 @1k
MAX2751 212022609.7
$1.57 @1k
MAX2752 2025202510
$1.65 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX2750EVKIT: Evaluation Kit for the MAX2750, MAX2751, MAX2752
MAX2751EVKIT: Evaluation Kit for the MAX2750, MAX2751, MAX2752
MAX2752EVKIT: Evaluation Kit for the MAX2750, MAX2751, MAX2752

Technical Documents

Tutorial 5300 RF Basics
Tutorial 5100 General Layout Guidelines for RF and Mixed-Signal PCBs
Request Reliability Report for: MAX2752 
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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