InsideShowcase (Volume 25) is available in HTML and PDF format. - 395KBVideo solutions for PC platforms Fastest low power, 10-bit, 1.25-MSPS serial ADC GPLynx simplifies 1394 implementation Single-chip, 900 MHz RF downcoverter 900-MHz RF transmit driver extends system performance 350-mW low-voltage audio amplifiers First 2-W stereo audio amplifier sytems with depop circuitry Highest-bandwidth low-voltage rail-to-rail CMOS op amp High-speed wide supply voltage op amp TCM38C17 QCombo Quad-Channel PCM Codec/Filter Combo |
Single-chip, 900 MHz RF downconverterProduct Features
The TRF1015 is an RF downconverter suitable for 900-MHz applications. This highly integrated device combines a low noise amplifier (LNA), a buffered voltage-controlled oscillator (VCO) and an RF mixer. It converts RF signals to Intermediate Frequency (IF) signals. Key applications include:
 The TRF1015 provides three independently selectable modes of operation for both the LNA and the mixer: extended compression, standby and low current. For applications requiring full duplex capability, the extended compression mode maintains receiver sensitivity in the presence of large interfering signals and provides a low bit-error rate (BER) in a digital modulation system. Standby mode enhances overall device power conservation by allowing any or all of the integrated device components, including the LNA, VCO or RF mixer, to be completely shut down when they are not in use. For applications without full duplex operation, low current mode enables power advantages over the extended compression mode. In low current mode, typical dc current consumption is 2 mA for the LNA, 14 mA for the RF mixer and buffer amplifier, and 4 mA for the VCO. The TRF1015 combines high gain and low noise to provide a powerful RF component. The LNA has a gain of 13 dB, with a noise figure of 2.2 dB. The single balanced RF mixer features a gain of 9 dB, with a single-sideband (SSB) noise figure of 10 dB. The VCO gain and tuning range can be adjusted to meet phase-locked loop (PLL) design requirements with external shunt and feedback capacitors in series with the resonator. Competitive RF downconverter solutions provide approximately 7 dB less cascaded gain while consuming the same amount of power. The TRF1015 is available in a 20-pin plastic shrink small outline (SSOP) package.
Vol 26 February, 1998 |
