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MAX2870：23.5MHz to 6000MHz Fractional/Integer-N Synthesizer/VCO

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

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 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.

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

MAX2870: Functional Diagram Applications/Uses Clock Generation PMAR/LMAR/Public Safety Radio Satellite Communications Test and Measurement Wireless Infrastructure Wireless LANs/CATV

DataSheet

Parametrics

Design kits & evaluation modules

• MAX2870EVKIT
• MAX2871EVKIT

Quality and Environmental Data

• MAX2870.pdf

Ordering Information