MAX2871

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

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


Description

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.
MAX2871: Functional Diagram MAX2871: Functional Diagram Enlarge+

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

Applications/Uses

  • Clock Generation
  • Microwave Radios
  • Test and Measurement
  • Wireless Infrastructure
Part Number Synthesizer Mode VSUPPLY
(V)
Oper. Freq.
(MHz)
Oper. Freq.
(MHz)
Prog. POUT
(dBm)
Differential RF Outputs Inband Noise Floor
(dBc/Hz)
RMS Jitter
(ps RMS)
Package/Pins Oper. Temp.
(°C)
Budgetary
Price
min max typ See Notes
MAX2871 
Fractional
Integer
3.0 to 3.6 23.5 6000 -4 to +5 2 -229 0.2
TQFN/32
-40 to +85 $6.11 @1k
See All PLLs/PLLs with Integrated VCO (3)
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

Quality and Environmental Data

Product Reliability Reports: MAX2871.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

MAX2871 IBIS Model

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