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1.8-V low noise amplifier offers dual modes for mobile TVs

Neubiberg, Germany — At the IEEE MTT-S International Microwave Symposium 2008 (IMS2008), Infineon Technologies AG has announced the availability of the company's new low noise amplifier (LNA). One of the industry's smallest broadband LNAs for portable and mobile TV applications, the BGA728L7 is touted as the first mobile TV LNA worldwide to support 1.8-V, 2.8-V and 3.3-V operations.

The BGA728L7 is optimized for a wide frequency range covering VHFIII, UHF and L bands, and is one of the few mobile TV LNAs offering dual modes (high-gain mode and low gain mode). At high-gain mode the BGA728L7 helps to improve reception sensitivity for weak signals through its noise figure of 1.4 dB combined with 16 dB gain. At high-gain mode, it consumes about 5 mA current. For a strong input signal, the BGA728L7 can be switched to a low-gain mode to offer higher linearity with low current consumption of only 0.5 mA. The fast switching time of 3.5 us also allows it to support time-slicing-based mobile TV systems.

Due to the low voltage and low current capabilities, BGA728L7 allows higher energy efficiency for portable devices and extends their battery usage time. The BGA728L7 supports various standards such as DVB-T, DVB-H, ISDB-T, MediaFLO, T-DMB, as well as the emerging Chinese standards including CMMB, TMMB or DMB-TH.

The BGA728L7 integrates an on-chip 1 kV HBM ESD protection, a high performance SiGe bipolar transistor as well as components such as active-biasing, feedback and input/output matching circuits. The LNA needs only three external passive components compared to approximately five to ten additional external components of current designs.

Pricing: Starts at $0.6 each in quantities of 10,000.

Availability: Samples of the BGA728L7 ((leadless TSLP7-1, 2.0 x 1.3 x 0.4 mm)
are available now, with volume production to begin in July 2008. Evaluation kits are available.
Product information: RF MMICs

Infineon Technologies AG , www.infineon.com

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