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Корпус / Упаковка / Маркировка

Параметры

Экологический статус

Другие варианты исполнения

LTC2254 LTC2254

Design Notes

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  Signal Chain Noise Analysis for RF-to-Digital Receivers &mdash DN439
  PDF, 85 Кб, Файл опубликован: 16 апр 2008
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  Signal Chain Noise Analysis for RF-to-Digital Receivers
  Design Note 439
  Cheng-Wei Pei
  Introduction
  Designers of signal receiver systems often need to perform cascaded chain analysis of system performance
  from the antenna all the way to the ADC. Noise is a critical parameter in the chain analysis because it limits the
  overall sensitivity of the receiver. An application’s noise
  requirement has a significant influence on the system
  topology, since the choice of topology strives to optimize
  the overall signal-to-noise ratio, dynamic range and
  several other parameters. One problem in noise calculations is translating between the various units used by the
  components in the chain: namely the RF, IF/baseband,
  and digital (ADC) sections of the circuit.
  Figure 1 shows a simplified system diagram. There is
  an RF section, an IF/baseband section (represented
  by an amplifier) and an ADC. The RF section, which
  includes a mixer or demodulator, is commonly specified
  using noise п¬Ѓgure (NF) in a decibel scale (dB). This may
  also be specified with a noise power spectral density
  which is similar to NF in concept (e.g., –160dBm/Hz is
  RF SECTION
  NOISE FIGURE (dB) 1 RT
  50О© – …

Модельный ряд

Классификация производителя

• Data Conversion > Analog-to-Digital Converters (ADC) > High Speed ADCs (Fs >=10Msps)

Варианты написания:

LTC2255IUHTRPBF, LTC2255IUH TRPBF