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

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.

Applications

* Clock Generation

* PMAR/LMAR/Public Safety Radio

* Satellite Communications

* Test and Measurement

* Wireless Infrastructure

* Wireless LANs/CATV

* 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