SA639 - Low voltage mixer FM IF system with filter amplifier and data switch
The SA639 is a low-voltage high performance monolithic FM IF system with high-speed RSSI incorporating a mixer/oscillator, two wideband limiting intermediate frequency amplifiers, quadrature detector, logarithmic received signal strength indicator (RSSI), fast RSSI op amps, voltage regulator, wideba
SA639 Features
* XTAL oscillator effective to 150MHz (L.C. oscillator to 1GHz local oscillator can be injected)
* VCC = 2.7 to 5.5V
* Low power consumption: 8.6mA typ at 3V
* Wideband data output (1MHz min.)
* Fast RSSI rise and fall times
* Mixer input to >500MHz
