ULTRA-SMALL SiGe LNAS WITH ON-CHIP 50-OHM OUTPUT MATCH REDUCE SOLUTION SIZE TO LESS THAN 7 SQUARE MILLIMETERS
SUNNYVALE, CA-February 26, 2001-Maxim Integrated Products introduces a family of three high-performance, ultra-small SiGe low-noise amplifiers designed for GPS receiver and PCS handset applications. The MAX2654/MAX2655/MAX2656 LNAs incorporate on-chip output 50-ohm match, eliminating an inductor and capacitor that are required on other LNA IC solutions. The LNAs are packaged in the ultra-small 6-pin SC70 package measuring 2mm x 2.2mm, 40% smaller than a SOT23 package. Using 0402 external components, the total board space required for the LNA is less than 7mm2.
The MAX2654 LNA operates at 1575MHz for GPS applications, providing 15dB gain, 1.5dB noise figure, -7dBm input IP3 for only 5.8mA. The MAX2655 also operates at 1575MHz, proving 14dB gain, 1.5dB NF, and a robust +2.8dBm input IP3 for 8.3mA. The high IP3 makes it ideal for GPS application in dual-band cellular phones, where the signal from the DCS or PCS power amplifier leaks into the GPS receiver and presents itself as a high-level interfering signal. The MAX2656 LNA is designed for 1900MHz PCS phone application, providing 13.5dB gain, 1.9dB noise figure, and -3dBm input IP3 for 8.5mA. The MAX2654/MAX2655 GPS LNAs provide a 0.1µA low-power shutdown feature, eliminating the need for an external supply switch. The MAX2656 PCS LNA provides a logic-controlled gain-step function, reducing the gain to 0.8dB (12.7dB step) in the low-gain mode.
All three devices operate on a +2.7V to +5.5V single supply. Prices starts at $0.89 (1000-up, FOB USA). Fully assembled evaluation kits (MAX2654EVKIT, MAX2655EVKIT, and MAX2656EVKIT) are available to help reduce design time.
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