Infineon Technologies is offering a low noise amplifier (LNA) for portable and mobile TV applications which supports operation at 1.8V, 2.8V and 3.3V.

Among the design challenges for mobile TV systems is achieving the high dynamic range and system sensitivity for in-door reception. It is also necessary to fulfil the stringent MBRAI (multi-basic rate interface) requirements.

At high-gain mode BGA728L7 helps to improve reception sensitivity for weak signals through its noise figure of 1.4dB combined with 16dB gain. 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 0.5mA.

High gain and low noise helps sensitivity. By switching to low-gain mode with input 1dB Compression Point of +3.5dBm, the LNA can handle higher input power level and therefore increase the system’s dynamic range by up to 20dB. The fast switching time of 3.5[micro]s also allows it to support time-slicing-based mobile TV systems.

It is optimised for a wide frequency range covering VHFIII, UHF and L bands, and offers dual modes (high-gain mode and low gain mode).

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 supports a broad supply voltage range from 1.5 V to 3.6 V. At high-gain mode, it consumes about 5mA current. The noise figure is as low as 1.4 dB and the gain is about 16 dB with minimum variation over the complete working frequency range. At low gain mode, input IP3 (Third Order Intercept Point) is +16dBm at a current of only 0.5mA.

The BGA728L7 is shipped in a leadless TSLP7-1 package measuring 2.0x1.3x0.4mm.

See http://www.infineon.com/rfmmic