Global Sources
EE Times-India
Stay in touch with EE Times India
EE Times-India > RF/Microwave

Down-converting mixer packs LO switch, buffer, splitter

Posted: 08 Jun 2010     Print Version  Bookmark and Share

Keywords:mixer  3G  base station  W-CDMA  down-converter 

Maxim Integrated Products has released the MAX19994A, a dual down-converting mixer that packs on-chip LO switch, buffer and splitter to deliver a combination of linearity, noise performance and component integration.


Designed using Maxim's proprietary monolithic SiGe BiCMOS process, this device delivers an combination of linearity, noise performance and component integration. A single IC provides two independent down-conversion channels, each with a +25dBm (typ) IIP3, 8.4dB (typ) conversion gain, and 9.8dB (typ) noise figure.

Additionally, the MAX19994A offers an 2LO-2RF spurious rejection of 68dBc for an RF level of -10dBm, and 63dBc for a level of -5dBm. This mixer is designed specifically for 2.5/3G/4G wireless-infrastructure applications in which high linearity and a low noise figure are critical for enhanced receiver sensitivity and blocker immunity. The MAX19994A supports high-side LO injection architectures for 1.2GHz to 1.7GHz W-CDMA/LTE base stations; it can also be configured for 1.7GHz to 2GHz GSM/Edge, W-CDMA/LTE, TD-SCDMA, and cdma2000 low-side injection architectures.

As a complete SiGe down-converter, the MAX19994A integrates two mixer cores; four amplifiers; three baluns; an LO switch, buffer, and splitter; and dozens of discrete components. The device's 8.4dB conversion gain enables the elimination of a complete IF amplifier stage within the receiver line-up. The MAX19994A's outstanding 2LO-2RF and 2RF-2LO performance can also ease the filtering requirements of close-in harmonics, thus leading to simpler and more cost-effective filter designs. Through this combination of integration and performance, the device reduces mixer solution size by a factor of 2x and the discrete part count by 45 per cent.

The MAX19994A is packaged in a compact, 6mm x 6mm, 36-pin TQFN that is pin compatible with the MAX9985/MAX9995/MAX19985A/ MAX19993/MAX19995/MAX19995A series of 700MHz to 2200MHz dual mixers, and pin similar to the MAX19997A/MAX19999 series of 1850MHz to 4000MHz dual mixers. This complete family of down-converters is designed for applications in which a common PCB layout is used for multiple frequency bands. Prices start at Rs.457.22 ($9.96) 1,000-up, FOB USA.

Comment on "Down-converting mixer packs LO switc..."
*  You can enter [0] more charecters.
*Verify code:


Visit Asia Webinars to learn about the latest in technology and get practical design tips.


Go to top             Connect on Facebook      Follow us on Twitter      Follow us on Orkut

Back to Top