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SA625 Datasheet

Part NameDescriptionManufacturer
SA625 High performance low power mixer FM IF system with high-speed RSSI Philips
Philips Electronics Philips
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DESCRIPTION
The SA625 is pin-to-pin compatible with the SA605, but has faster RSSI rise and fall times. The SA625 is a high performance monolithic low-power FM IF system incorporating a mixer/oscillator, two limiting intermediate frequency amplifiers, quadrature detector, muting, logarithmic received signal strength indicator (RSSI) with fast rise and fall time, and voltage regulator.

FEATURES
•Fast RSSI rise and fall times
•Low power consumption: 5.8mA typical at 6V
•Mixer input to >500MHz
•Mixer conversion power gain of 13dB at 45MHz
•Mixer noise figure of 4.6dB at 45MHz
•XTAL oscillator effective to 150MHz (L.C. oscillator to 1GHz local oscillator can be injected)
•102dB of IF Amp/Limiter gain
•25MHz limiter small signal bandwidth
•Temperature compensated logarithmic Received Signal Strength Indicator (RSSI) with a dynamic range in excess of 90dB
•Two audio outputs - muted and unmuted
•Low external component count; suitable for crystal/ceramic/LC filters
•Excellent sensitivity: 0.22µV into 50Ωmatching network for 12dB SINAD (Signal to Noise and Distortion ratio) for 1kHz tone with RF at 45MHz and IF at 455kHz
•SA625 meets cellular radio specifications
•ESD hardened

APPLICATIONS
•Digital cellular base stations
•High performance communications receivers
•Single conversion VHF/UHF receivers
•SCA receivers
•RF level meter
•Spectrum analyzer
•Instrumentation
•FSK and ASK data receivers
•Log amps
•Wideband low current amplification
•Digital cordless telephones

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