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Highest performance 815MHz to 1000MHz SiGe passive mixer?

Posted: 29 Jul 2005 ?? ?Print Version ?Bookmark and Share

Keywords:maxim integrated products? max2031? sige passive mixer? passive mixer?

Maxim Integrated Products released what it touts as the industry's highest performance, fully integrated, 815MHz to 1,000MHz SiGe passive mixer. The MAX2031 IC provides 36dBm of IIP3, 27dBm of IP1dB, 7dB of noise figure, and a conversion loss of 7dB. In addition, Maxim said, this new product exhibits excellent 2nd- and 3rd-order spurious suppression.

Designed for 2.5G/3G wireless-infrastructure applications, the MAX2031 promises an unparalleled combination of linearity, noise performance and component integration. It is suitable for 815MHz to 1,000MHz W-CDMA, GSM850/GSM900 EDGE, cdma2000, and iDEN base station applications where high linearity and low noise figure are critical for enhanced receiver and transmitter performance.

As a complete SiGe up- and downconverter, the MAX2031 integrates a state-of-the-art double-balanced mixer core with an LO amplifier, two baluns, an LO switch, plus dozens of discrete components. According to the press release, this integration reduces the total board space used by the mixer by a factor of 2.5x, and reduces the discrete part count by 33 percent. The MAX2031's outstanding 2RF-2LO performance can also ease the filtering requirements of close-in harmonics, thus leading to simpler and more cost-effective filter designs, added Maxim.

Frequency hopping is supported with the integrated SPDT LO switch with switching speeds of <50ns and 49dB of LO1-to-LO2 isolation. The on-board 0dBm drive, LO buffer provides 3dB drive-variance control, yielding stable gain, NF, and IIP3 performance over temperature, supply and input power. The device has excellent 0.2/-0.3dB gain-variation over the -40C to 85C industrial temperature range. IIP3 spread is 0.3dB over temperature.

The MAX2031 comes in a compact 5-by-5mm, 20-pin thin QFN, which is pin compatible with the MAX2039/MAX2041* series of 1,700MHz to 2,200MHz mixers. This entire family of passive up- and downconverters is designed for applications where a common PC-board layout is used for both wireless-infrastructure frequency bands. Pb-free packaging is available for the MAX2031, and prices start at $6.15 (1,000-up, FOB USA).

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