45MHz to 650MHz, Integrated IF VCOs with Differential Output

The MAX2605-MAX2609 are compact, high-performance intermediate-frequency (IF) voltage-controlled oscillators (VCOs) designed specifically for demanding portable wireless communication systems. They combine monolithic construction with low-noise, low-power operation in a tiny 6-pin SOT23 package.

These low-noise VCOs feature an on-chip varactor and feedback capacitors that eliminate the need for external tuning elements, making the MAX2605-MAX2609 ideal for portable systems. Only an external inductor is required to set the oscillation frequency. In addition, an integrated differential output buffer is provided for driving a mixer or prescaler. The buffer output is capable of supplying up to -8dBm (differential) with a simple power match. It also provides isolation from load impedance variations.

The MAX2605-MAX2609 operate from a single +2.7V to +5.5V supply and offer low current consumption. These IF oscillators can cover the 45MHz to 650MHz frequency range.

Applications

* 2.4GHz ISM Band * 902MHz to 928MHz ISM Band * Cellular and PCS Mobile Phones * General-Purpose IF Oscillators * GPS Receivers * Land Mobile Radios

* Small Size

* Integrated Varactor for Tuning

* Low Phase Noise

* Wide Application Frequency Range

* Differential or Single-Ended Outputs

* Single +2.7V to +5.5V Supply

* Ultra-Small SOT23-6 Package

* On-Chip Temperature-Stable Bias

* Low-Current Operation