SA639 Overview
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, wideband data output, post detection filter amplifier and data switch. The SA639 is available in 24-lead TSSOP (Thin shrink...
SA639 Key Features
- XTAL oscillator effective to 150MHz (L.C. oscillator to 1GHz local
- 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
- Mixer conversion power gain of 9.2dB and noise figure of 11dB at
- 92dB of IF Amp/Limiter power gain
- 25MHz limiter small signal bandwidth
- Temperature pensated logarithmic Received Signal Strength
