data brief for further information contact your local stmicroelectronics sales office. june 2011 doc id 018892 rev 1 1/4 4 STVVGLNA general-purpose, variable-gain, low-noise, rf amplifier for broadcast receiver applications features 75- single-ended input impedance 75- single-ended or 150- differential output impedance dual differential or single-ended outputs single 3.3-v dc supply input frequency range 50 to 2150 mhz fully integrated rf agc with power monitoring low external component count low power consumption (145 mw typical) temperature range -35 c to 85 c compatible with 5-v and 3.3-v i 2 c bus i 2 c bus control (option) four selectable i 2 c addresses c8,ca,cc,ce applications satellite set-top boxes smatv rf accessories lnbs dvb-t active indoor antennas package vfqfpn-16l 3x3x0.85 mm 3 with exposed pad down (epd) environmentally friendly packaging, rohs (2002/95/ec) compliant. description the STVVGLNA is a general-purpose, low-noise amplifier with a gain range of -17 db to +15 db. its gain is regulated either autonomously by an integrated agc loop or by software control. it can be used, for example, as an input amplifier for a satellite set-top box. figure 1. STVVGLNA block diagram STVVGLNA scl sda vagci vagco agc loop i 2 c tv1 tuner dvr tuner f www.st.com
introduction STVVGLNA 2/4 doc id 018892 rev 1 1 introduction the STVVGLNA is a front-stage amplifier designed for set-top boxes. it has high input power dynamic range to allow the optimization of sensitivity and linearity requirements. the STVVGLNA has several operating modes suitable for different signal conditions: automatic wide-band mode, internal agc (the default mode) semi-automatic wide-band mode, internal agc fixed gain mode, no agc variable gain with external agc (driven by demodulator, for example) the mode of operation is programmable via the i 2 c bus. the STVVGLNA also provides a rf-signal-level indication which may be interrogated via the i 2 c bus. this is useful for installation and status information. at power-on, the STVVGLNA starts in automatic and autonomous agc mode so that it can operate in satellite set-top boxes, lnbs or smatv accessories without any software assistance. features benefits active amplitude compensation and balanced/differential operation. simplified rf layout and increased robustness to interference. four agc/gain programmable operating modes. flexible agc strategy. programmable via i2c bus. the device can be p controlled. wide range of input frequencies. applications range from satellite receivers down to vhf antenna amplifiers. low component count plus tiny package with exposed pad. small bom and minimal use of pcb area. pre programmed automatic wide-band internal agc mode. no micro processor is required if the STVVGLNA is to be used in default mode.
STVVGLNA ordering information doc id 018892 rev 1 3/4 2 ordering information 3 revision history table 1. device summary order code temperature range package packaging STVVGLNA -35 to 85 c vfqfpn-16l epd tray STVVGLNAt -35 to 85 c vfqfpn-16l epd reel table 2. document revision history date revision changes 01-jun-2011 1 initial release.
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