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 50Ω 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