2.4GHz Monolithic Voltage-Controlled Oscillator

The MAX2750AUA is a self-contained voltage-controlled oscillator (VCO) intended for use over the 2370MHz to 2470MHz frequency range. The IC combines a fully integrated oscillator and output buffer in a miniature 8-pin µMAX® package.

The inductor and varactor elements of the tank are integrated on-chip, greatly simplifying application of the part. The only required external components are a couple of supply bypass capacitors. The IC provides direct connection to the VCO tuning voltage input and the VCO buffer output. The tuning voltage input range is +0.4V to +2.4V, and the oscillator frequency tuning range is factory adjusted to provide guaranteed limits. The output signal is buffered by an amplifier stage (internally matched to 50Ω) to provide higher output power and isolate the device from load impedance variations.

The MAX2750AUA operates over a +2.7V to +5.5V supply voltage range. Internal regulation of the oscillator supply voltage eliminates the need for an external LDO regulator for the VCO. The IC also provides a digitally controlled shutdown mode to permit implementation of sophisticated power-supply management. In shutdown, the supply current is reduced to less than 2µA.

Applications

* 2.4GHz ISM Band

* Guaranteed Frequency Tuning Range: 2370MHz to 2470MHz

* On-Chip Tank Circuit

* Internally Matched Output Buffer Amplifier

* Low-Current Shutdown Mode

* +2.7V to +5.5V Supply Voltage Range

* Miniature 8-Pin µMAX Package

* -40°C to +125°C Temperature Range