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MT1560 Datasheet(PDF) 1 Page - Microtune,Inc |
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MT1560 Datasheet(HTML) 1 Page - Microtune,Inc |
1 / 2 page RF SILICON AND SYSTEMS SOLUTIONS FOR BROADBAND COMMUNICATIONS, AUTOMOTIVE ELECTRONICS AND WIRELESS CONNECTIVITY M I C R O T U N E MT1560 UPSTREAM AMPLIFIER PRODUCT BRIEF The MT1560 is a 3.3V programmable gain upstream amplifier. The Microtune® MT1560 is a low- cost programmable-gain power amplifier IC for use in CATV upstream applications. The MT1560 is a 3.3 volt part optimized for the DOCSIS 2.0 upstream standard. The device’s specified frequency range is from 5MHz to 65MHz, and can output 67dBmV through a 1:1 impedance-ratio transformer. A 3- wire digital serial bus controls the variable gain, with gain control available in 1dB steps and a nominal 59dB gain range. The MT1560 may be disabled via an external control pin. The transmit- disable mode not only minimizes output noise by shutting off the output stage, but also maintains its output impedance at nominal levels. Output transients are nominally less than 16mVp-p at 61dBmV output level during transmit enable/disable switching. Operating from a single +3.3V supply, the amplifier’s typical current draw at maximum gain, or minimum attenuation, is 212mA. Additional internal circuitry reduces the amplifier’s power consumption depending on gain setting. Transmit-disable mode power supply current is reduced to a nominal of 18mA. A shutdown mode further reduces current to a nominal of 80µA. The MT1560 is available in a 20- pin MicroLeadFrame™ package with an exposed pad for the extended industrial temperature range of -40°C to +85°C. MT1560 APPLICATIONS • Cable modems • Telephony over cable • Set-top box CATV FEATURES • Maximum output level of 67dBmV • Low power-up/down transients of 16mVp-p typical at 61dBmV output • Ultra low third harmonic distortion • Single +3.3V supply • 59dB gain range • Gain programmable in 1dB steps • Low transmit output noise floor: -51dBmV in 160kHz • Low transmit-disable output noise: -68dBmV • Two power-down modes • DOCSIS 2.0 compatible MT1560 Upstream Amplifier |
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