23.5MHz to 6000MHz Fractional/Integer-N Synthesizer/VCO

High-Performance, Wide-Frequency PLL with Integrated VCOs Simplifies Signal Chain and Improves Performance

Please check latest availability status for a specific part variant.


The MAX2870 is an ultra-wideband phase-locked loop (PLL) with integrated voltage controlled oscillators (VCOs) capable of operating in both integer-N and fractional-N modes. When combined with an external reference oscillator and loop filter, the MAX2870 is a high-performance frequency synthesizer capable of synthesizing frequencies from 23.5MHz to 6.0GHz while maintaining superior phase noise and spurious performance.

The ultra-wide frequency range is achieved with the help of multiple integrated VCOs covering 3000MHz to 6000MHz, and output dividers ranging from 1 to 128. The device also provides dual differential output drivers, which can be independently programmable to deliver -4dBm to +5dBm output power. Both outputs can be muted by either software or hardware control.

The MAX2870 is controlled by a 4-wire serial interface and is compatible with 1.8V control logic. The device is available in a lead-free, RoHS-compliant, 5mm x 5mm, 32-pin TQFN package, and operates over an extended -40°C to +85°C temperature range.

What are the differences between MAX2870 and MAX2871? ›

MAX2870: Functional Diagram MAX2870: Functional Diagram Enlarge+

Key Features

  • Integer and Fractional-N Modes
  • Manual or Automatic VCO Selection
  • 3000MHz to 6000MHz Fundamental VCO
  • Output Binary Buffers/Dividers for Extended Frequency Range
    • 1/2/4/8/16/32/64/128
    • 23.5MHz to 6000MHz
  • Low Phase Noise
    • RMS Jitter: 0.25psRMS (typ)
    • EVM at 2.1GHz: 0.35% (typ)
  • High-Performance PFD
    • 105MHz in Integer-N Mode
    • 50MHz in Fractional-N Mode
  • Reference Frequency Up to 200MHz
  • Operates from +3.0V to +3.6V Supply
  • Dual Programmable Outputs
    • -4dBm to +5dBm
  • Analog and Digital Lock Detect Indicators
  • Hardware and Software Shutdown Control
  • Compatible with 1.8V Control Logic


  • Clock Generation
  • PMAR/LMAR/Public Safety Radio
  • Satellite Communications
  • Test and Measurement
  • Wireless Infrastructure
  • Wireless LANs/CATV

See parametric specs for PLLs/PLLs with Integrated VCO (3)

Part NumberSynthesizer ModeVSUPPLY
Oper. Freq.
Oper. Freq.
Prog. POUT
Differential RF OutputsInband Noise Floor
RMS Jitter
(ps RMS)
EVM @ 2.1GHz
Package/PinsOper. Temp.
minmaxtyptypSee Notes
3.0 to 3.623.56000-4 to +52-
-40 to +85$7.04 @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.

MAX2870EVKIT: Evaluation Kit for the MAX2870 and MAX2871
MAX2871EVKIT: Evaluation Kit for the MAX2870 and MAX2871

Tools & Models

  • MAX2870 IBIS Model
  • Product Reliability Reports: MAX2870.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.

    Quality Management System >
    Environmental Management System >


    Related Resources

    Ultra-Wideband, Direct-Conversion, L-Band Satellite Tuner

    • 925MHz to 2175MHz Frequency Range
    • Monolithic VCO
    • High Dynamic Range: -75dBm to 0dBm