Low-Power FM IF System

SA614A

The SA614A is an improved monolithic low-power FM IF system. It incorporates two limiting intermediate frequency amplifiers, quadrature detector, muting, logarithmic received signal strength indicator, and voltage regulator. The SA614A features higher IF bandwidth (25 MHz) and temperature compensated RSSI and limiters permitting higher performance application compared with the SA604. The SA614A is available in a SO (surface‑mounted miniature) package.

Product Details

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Features

  • Low power consumption: 3.3 mA typical
  • Temperature compensated logarithmic RSSI with a 90 dB dynamic range
  • Two audio outputs - muted and unmuted
  • Low external component count; suitable for crystal/ceramic filters
  • Excellent sensitivity: 1.5 µV across input pins (0.22 µV into 50 Ω matching network) for 12 dB SINAD (Signal to Noise and Distortion ratio) for 1 kHz tone with RF at 45 MHz and IF at 455 kHz
  • SA614A meets cellular radio specifications

Target Applications

  • Cellular radio FM IF
  • High performance communications receivers
  • Intermediate frequency amplification and detection up to 25MHz
  • RF level meter
  • Spectrum analyzer
  • Instrumentation
  • FSK and ASK data receivers

Design Resources

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Documentation

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Hardware

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1 hardware offering

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