INDUSTRY'S FIRST 2.4GHz MONOLITHIC VCO ICs REPLACE EXPENSIVE VCO MODULES
Note to editor: The MAX2750/MAX2751/MAX2752 are the industry’s first 2.4GHz, fully self-contained VCOs that integrate the inductor and varactor tuning elements. The voltage input tuning range and frequency tuning range are factory-adjusted to provide guaranteed limits, similar to a VCO module, but at 30% lower cost and 60% reduction in board space.
SUNNYVALE, CA-November 22, 2000-Maxim Integrated Products introduces the MAX2750/MAX2751/MAX2752, a family of fully self-contained voltage-controlled oscillators (VCOs) designed for use in 2.4GHz ISM applications such as 802.11 WLAN, HomeRF, Bluetooth, and other proprietary radios. MAX2752 is ideally suited for 802.11b 11Mbps WLAN applications. These ICs provide the benefits of ease-of-use and guaranteed performance, similar to a VCO module, but at 30% lower cost and with 60% reduction in board space. In addition, the internal regulation of the oscillator supply voltage eliminates the need for a dedicated, external, low dropout (LDO) regulator, further reducing cost and size.
Each IC consists of an oscillator, voltage regulator, output buffer, and the inductor and varactor tuning elements. Typical applications require only two external bypass capacitors. Each oscillator has a tuning voltage input range of 0.4V to 2.4V. The oscillator frequency tuning range is factory-adjusted to provide guaranteed limits. The MAX2750 is guaranteed to tune from 2400MHz to 2500MHz (zero IF), the MAX2751 from 2120MHz to 2260MHz (low-side LO, 240MHz to 280MHz IF), and the MAX2752 from 2025MHz to 2165MHz (low-side LO, 335MHz to 375MHz). Phase noise performance is typically –125 dBc/Hz at 4MHz offset.
The MAX2750/MAX2751/MAX2752 operate over a +2.7V to +5.5V supply range, consuming only about 10mA of supply current. A digitally controlled shutdown mode permits implementation of sophisticated power supply management. In shutdown, the supply current is reduced to less than 1µA. The devices are available in the miniature 8-pin µMAX package. Prices start at $1.78 (1000-up, FOB USA). A fully assembled evaluation kit (MAX2750/MAX2751/MAX2752EVKIT) is available to help reduce design time.
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