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RF antenna switch claims highest throw count

Posted: 12 Jul 2007 ?? ?Print Version ?Bookmark and Share

Keywords:CMOS? RF antenna switch? highest throw count?

RoHS Peregrine RoHSSemiconductor has announced the 0.5?m PE42693 SP9T RF antenna switch, reporting that it is the highest throw-count RF CMOS antenna switch available on the market today. And, in order to support more highly integrated W-CDMA products, Peregrine also announced that it has qualified its 0.25?m UltraCMOS technology for three new SP9T switches: the wirebond PE42691 and the flip-chip PE42692 and PE42694 devices.

"The latest multiband handset designs require a single, high-throw switch with unprecedented linearity and small signal performance and a minimal footprint. These new switches are changing the way designers architect their modules," said Rodd Novak, VP of marketing for Peregrine. A key size benefit of the UltraCMOS SP9T is that it does not require off-chip decoder and driver components. This results in as much as a 50 percent smaller footprint with the 0.5?m PE42693 when compared with a similar GaAs SP9T. Manufactured in 0.25 ?m, the PE42691, PE42692, and PE42694 SP9Ts will save yet another 30 percent.

Designed for quad-band GSM and GSM/W-CDMA handsets, the PE42693 die supports antenna switch module (ASM) applications with two GSM/PCS/EDGE compliant TX ports, three TRX ports (designed for W-CDMA or as transmit/receive ports) and four symmetric RX ports. Multiple antenna pads allow for flexible impedance matching, while a four-pin CMOS logic control with integral decoder/driver facilitates both 1.8V and 2.75V control.

The UltraCMOS-based PE42693 incorporates Peregrine's HaRP technology enhancements to deliver exceptional harmonic results, linearity and overall RF performance. For example, the device features linearity of 68dBm IP3, -110dBm IMD3, 51dB of TX-RX isolation at 850MHz, insertion loss of 0.7dB at 850MHz W-CDMA. This 2.75V RF switch operates from 100-3,000 MHz and features 1,500V ESD tolerance at all ports, no blocking capacitors and fast switch settling time.

The PE42691 wirebond SP9T and the PE42692 and PE42694 flip chip SP9Ts are the latest in a series of high-performance switches designed for quad-band GSM and GSM/W-CDMA handset applications. These SP9T switches offer two GSM/PCS/Edge compliant TX ports, three TRX ports (designed for W-CDMA or as transmit/receive ports) and four symmetric RX ports.

The PE42691 wirebond die has multiple antenna pads to allow for flexible impedance matching, while the PE42692 and PE42694 represent two different logic configuration options in a tiny flip-chip package. The availability of a flip-chip version offers significant space savings in ASM designs, which can lead to unprecedented competitive advantages in footprint. Each switch's four pin CMOS logic control with integral decoder/driver facilitates both 1.8V and 2.75V control. Key specifications for these 0.25 ?m SP9T switches include: IMD3: -112dBm, second harmonics of -76dBc and third harmonics of -76dBc. IIP3 is specified at 69dBm, TRX insertion loss (850 W-CDMA) is 0.55dB, TX-RX isolation is 51dB at 900MHz and 45dB at 1,900Hz and ESD tolerance is 1.5kV HBM at all ports.

The PE42693 is sampling now and is slated for volume production in multiple facilities in Q3 2007, including those of Peregrine's strategic manufacturing partner, Oki Electric Industry Co. Ltd. The device is priced at 90 cents each in 10,000-piece units and is available in die form. The PE42691, PE42692 and PE42694 are scheduled to begin sampling to volume customers in Q3 with production slated in Q4 2007.

- Janine Love
RF Designline




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