SA639
Description
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.
Key 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
- Mixer conversion power gain of 9.2dB and noise figure of 11dB at 110MHz
- 92dB of IF Amp/Limiter power gain
- 25MHz limiter small signal bandwidth
- RSSI output internal op amp
Applications
- FSK and ASK data receivers
