DESCRIPTION

The SA608 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 SA608 is available in 20-lead dual-in-line plastic, 20-lead SOL (surface-mounted miniature package) and 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 limiter small signal bandwidth

? Temperature compensated logarithmic Received Signal Strength Indicator (RSSI) with a 90dB 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

? SA608 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