Monolithic Voltage Controlled Oscillators

Fully monolithic 900MHz SiGe VCO and Buffer in 8-Pin µMAX Package Replaces Modules

Please check latest availability status for a specific part variant.


The MAX2622/MAX2623/MAX2624 self-contained voltage-controlled oscillators (VCOs) combine an integrated oscillator and output buffer in a miniature 8-pin µMAX® package.

The inductor and varactor elements of the tank circuits are integrated on-chip, greatly simplifying application of the part. In addition, the center frequency of oscillation and frequency span are factory preset to provide a guaranteed frequency range versus control voltage. An external tuning voltage controls the oscillation frequency. The output signals are buffered by an amplifier stage (easily matched to 50Ω), using only capacitors to provide higher output power and isolate the devices from load impedance variations.

The MAX2622/MAX2623/MAX2624 operate from a +2.7V to +3.3V supply voltage and require only 9mA of supply current. In shutdown mode, the supply current is reduced to 0.1µA.
MAX2622, MAX2623, MAX2624: Typical Operating Circuit MAX2622, MAX2623, MAX2624: Typical Operating Circuit Enlarge+

Key Features

  • Fully Monolithic
  • Guaranteed Performance
  • On-Chip 50Ω Output Match
  • Wide Choice of Frequencies
    • 855MHz to 881MHz (MAX2622)
    • 885MHz to 950MHz (MAX2623)
    • 947MHz to 998MHz (MAX2624)
  • +2.7V to +3.3V Single-Supply Operation
  • Low-Current Shutdown Mode
  • Smaller than Modules (8-pin µMAX package)


  • 866MHz to 868MHz European ISM Band (MAX2622)
  • 902MHz to 928MHz ISM Band, ±10.7MHz IF (MAX2623)
  • 902MHz to 928MHz ISM Band, 45MHz to 70MHz IF (MAX2624)
  • DECT 1/2 Frequency LO (MAX2623)

See parametric specs for VCOs (14)

Part NumberLO Driver OutputsPLL Driver OutputsRF Freq.
RF Freq.
(mm x mm)
minmaxminmaxSee Notes
MAX2622 NoYes855881-3-32.7 to 5.593.0 x 4.9
$2.14 @1k
MAX2623 885950
$3.01 @1k
MAX2624 947998
$3.38 @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.

MAX2622EVKIT: Evaluation Kit for the MAX2622, MAX2623, MAX2624
MAX2623EVKIT: Evaluation Kit for the MAX2622, MAX2623, MAX2624
MAX2624EVKIT: Evaluation Kit for the MAX2622, MAX2623, MAX2624
Request Reliability Report for: MAX2624 
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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