News

5 May 2009

 

Avago introduces two CDMA FEMs for mobile handsets

Avago Technologies of San Jose, CA, USA has introduced two new front end modules (FEMs) that incorporate a power amplifier (PA), duplexer, band-pass filter and coupler to improve efficiency and extend talk time in mobile handsets.

The AFEM-775x series includes Avago's CoolPAM and Film Bulk Acoustic Resonator (FBAR) technologies, which improve performance in CDMA cell band and dual-band handsets, wireless PDAs and wireless data cards, says the firm. The series are fully matched CDMA FEMs, designed to minimize power consumption with three power modes (high power, mid-power and bypass modes). Additionally, the CoolPAM-V technology incorporated in these modules does not require a DC-DC converter. The PA is based on InGaP HBT technology.

The AFEM-7758 is an FBAR-based duplexer that provides low insertion and outstanding isolation to minimize Tx leakage in both Rx and Tx bands over a wide temperature range, says Avago. It also improves handset receiver sensitivity and single tone desensitization performance. Furthermore, the optimized matching between the PA and duplexer eliminates the need for an isolator.

Features:

• Integrated duplexer, PA, band-pass filter and coupler.

• Operating frequencies: AFEM-7750 - Tx: 824 to 894 MHz Rx: 869 to 894 MHz. AFEM-7758 - TxZ: 1850 to 1910 MHz Rx: 1930 to 1990 MHz.

• 25 dBM linear output power @ 3.4V.

• High-power, low power and bypass modes: High power > 15dBm; Mid-power > 8dBm; Very low quiescent current in Bypass mode; High mid-power efficiency in min-power mode.

• 3.2 - 4.2V linear operation.

• High isolation (Low Tx leakage at Rx port).

• CDMA 2000 1xRTT capable.

• No DC-DC converter needed.

• 50 ohm input and output matching.

• 4 by 7 by 1.1mm SMT package.

Search: Avago CDMA FEMs InGaP HBT

Visit: www.avagotechwireless.com