250MHz to 12.4GHz, High-Performance, Fractional/Integer-N PLL

The MAX2880 is a high-performance phase-locked loop (PLL) capable of operating in both integer-N and fractional-N modes. Combined with an external reference oscillator, loop filter, and VCO, the device forms an ultra-low noise and low-spur frequency synthesizer capable of accepting RF input frequencies of up to 12.4GHz.

The MAX2880 consists of a high-frequency and low-noise-phase frequency detector (PFD), precision charge pump, 10-bit programmable reference counter, 16-bit integer N counter, and 12-bit variable modulus fractional modulator.

The MAX2880 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, 20-pin TQFN package, and operates over an extended -40°C to +85°C temperature range.

Applications

* Microwave Point-to-Point Systems * RF DAC and ADC Clocks * Satellite Communications * Test and Measurement * Wireless Infrastructure

* Integer and Fractional-N Modes

* 250MHz to 12.4GHz Broadband RF Input

* Normalized In-Band Noise Floor

* -229dBc/Hz in Integer Mode

* -227dBc/Hz in Fractional Mode

* -10dBm to +5dBm Wide Input Sensitivity

* Low-Noise Phase Frequency Detector

* 125MHz in Fractional Mode

* 140MHz in Integer Mode

* Reference Frequency Up to 210MHz

* Operates from +2.8V to +3.6V Supply

* Cycle Slip Reduction and Fast Lock

* Software and Hardware Shutdown

* Software Lock Detect

* On-Chip Temperature Sensor

* Compatible with +1.8V Control Logic

* Phase Adjustment