MAX2870 Frequency Synthesizer

Analog Devices' 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 23.5 MHz to 6.0 GHz while maintaining superior phase noise and spurious performance.

The ultra-wide frequency range is achieved with the help of multiple integrated VCOs covering a range from 3000 MHz to 6000 MHz, and output dividers ranging from 1 to 128. The device also provides dual differential output drivers, which can be independently programmable to deliver -4 dBm to +5 dBm 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 1.8 V control logic. The device is available in a lead-free, RoHS-compliant, 5 mm x 5 mm, 32-pin TQFN package, and operates over an extended -40°C to +85°C temperature range.