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DESCRIPTION

The SA617 is a low voltage high performance monolithic FM IF system incorporating a mixer/oscillator, two limiting intermediate frequency amplifiers, quadrature detector, logarithmic received signal strength indicator (RSSI), voltage regulator and audio and RSSI op amps. The SA617 is available in 20-lead SSOP package.

FEATURES

?Low power consumption: 3.5mA typical at 3V

?Mixer input to >150MHz

?Mixer conversion power gain of 17dB at 45MHz

?XTAL oscillator effective to 150MHz (L.C. oscillator or external oscillator can be used at higher frequencies)

?102dB of IF Amp/Limiter gain

?2MHz IF amp/limiter small signal bandwidth

?Temperature compensated logarithmic Received Signal Strength Indicator (RSSI) with a 80dB dynamic range

?Low external component count; suitable for crystal/ceramic/LC filters

?Excellent sensitivity: 0.31μV into 50?matching network for 12dB

SINAD (Signal to Noise and Distortion ratio) for 1kHz tone, 8kHz

deviation with RF at 45MHz and IF at 455kHz

?SA617 meets cellular radio specifications

?Audio output internal op amp

?RSSI output internal op amp

?Buffered frequency check output

?Internal op amps with rail-to-rail outputs

?ESD protection: Human Body Model 2kV Robot Model 200V

APPLICATIONS

?Portable cellular radio FM IF

?Cordless phones

?Narrow band cellular applications (NAMPS/NTACS)

?RF level meter

?Spectrum analyzer

?Instrumentation

?FSK and ASK data receivers

?Log amps

?Portable high performance communication receivers

?Single conversion VHF receivers

?Wireless systems