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Analog Angle Article

Global IC TV tuner surpasses can tuners

Carlsbad, CA–The MxL5007 from MaxLinear is a TV tuner IC which handles virtually all global standards in a single CMOS device, with performance that the vendor claims exceeds conventional so-called “can” (hybrid) devices, but at a lower price and power cost. Configured via an I2C interface, the IC takes a 75-ohm antenna signal as its input, and produces an IF output up to 44 MHz. The design does not require an external low noise amplifer (LNA), tracking filter, SAW filter, loop filter, or calibration of adjustments.

The 1.8 to 3.3V IC handles 44 to 1002 MHz and dissipates 300 mW (typical). Among the standards supported are ATSC, DVB-T, DVB-T(H), DVB-H, ISDB, DVB-C, 64/256 QAM, analog cable, DOCSIS, NTSC, PAL, and SECAM. Functions such as gain control, local oscillator generation, channel selectivity, and RF loop-through and integrated on chip; if necessary, these functions–as well as receiving mode for the various standards–are controlled using an I2C interface.

Input return loss is 10 dB for analog and digital modes, and noise figure is 4.5 dB. Analog adjacent channel rejection is 60 dB. For the RF loop-through, output return loss is 10 dB, with gain of 0 dB and a 6 dB noise figure. Channel bandwidths can be programmed to be 4, 6, 7, and 8 MHz, and the IC also includes automatic gain control (AGC) with 100 dB range and received signal strength indicator (RSSI).

The MxL5007, housed in a 5×5 mm, 32-lead QFN package, is sampling now and is priced under $1.50 in OEM quantities. For more information, contact MaxLinear, Inc. at www.maxlinear.com

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