MAX2871:23.5MHz to 6000MHz Fractional/Integer-N Synthesizer/VCO

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

The MAX2871 is an ultra-wideband phase-locked loop (PLL) with integrated voltage control oscillators (VCOs) capable of operating in both integer-N and fractional-N modes. When combined with an external reference oscillator and loop filter, the MAX2871 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 programmed to deliver -1dBm to +8dBm output power. Both outputs can be muted by either software or hardware control. The MAX2871 is controlled by a 3-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. The MAX2871 has an improved feature set and better overall phase noise and is fully pin- and software-compatible with the MAX2870.

Key Features
  • Output Binary Buffers/Dividers Enable Extended Frequency Range
    • Divider Ratios of 1/2/4/8/16/32/64/128
    • 23.5MHz to 6000MHz
  • High-Performance Phase Frequency Detector (PFD) and Reference Frequency Reduces Spectral Noise
    • PFD Up to 140MHz
    • Reference Frequency Up to 210MHz
  • Low Normalized Inband Phase Noise of -230dBc/Hz Reduces System Noise Floor Contribution
  • Manual or Automatic VCO Selection Permits Fast Switching
  • Output Phase Reset and Adjustment Allow Synchronization of Multiple Synthesizers
  • On-Chip Temperature Sensor with 7-Bit ADC Ensures Optimum VCO Selection
  • Cycle Slip Reduction and Fast Lock Features Improve Accuracy and Acquisition Time
  • VCO Lock Maintained Over Entire Temperature Range Provides Glitch-Free Operation
  • Dual Differential Programmable Outputs Maximize Flexibility of Use
MAX2871: Functional Diagram
MAX2871: Functional Diagram
Applications/Uses
  • Clock Generation
  • Microwave Radios
  • Test and Measurement
  • Wireless Infrastructure
DataSheet
titleDownload file
MAX2871?Data SheetMAX2871.pdf
Parametrics
Part NumberSynthesizer ModeVSUPPLY
(V)
Oper. Freq.
(MHz)
Oper. Freq.
(MHz)
Prog. POUT
(dBm)
Differential RF OutputsInband Noise Floor
(dBc/Hz)
RMS Jitter
(ps RMS)
Package/PinsOper. Temp.
(°C)
Budgetary
Price
minmaxtypSee Notes
MAX2871Fractional
Integer
3.0 to 3.623.56000-4 to +52-2290.2TQFN/32-40 to +85$6.11 @1k
Design kits & evaluation modules
Quality and Environmental Data
Related Products
  • MAX2870:23.5MHz to 6000MHz Fractional/Integer-N Synthesizer/VCO
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX2871ETJ+ActiveTQFN,;32 pin;26 mm?-40°C to +85°CLead Free
MAX2871ETJ+TActiveTQFN,;32 pin;26 mm?-40°C to +85°CLead Free
MAX2871.pdf MAX2871
MAX2871.pdf MAX2871
MAX2871.pdf MAX2871
MAX2871.pdf MAX2871
MAX2871.pdf MAX2871
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