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SA676 Datasheet PDF : 22 Pages
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SA676
Low-voltage mixer FM IF system
Rev. 3 — 19 July 2012
Product data sheet
1. General description
The SA676 is a low-voltage 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
SA676 is available in a 20-pin SSOP (Shrink Small Outline Package).
The SA676 was designed for cordless telephone applications in which efficient and
economic integrated solutions are required and yet high performance is desirable.
Although the product is not targeted to meet the stringent specifications of high
performance cellular equipment, it will exceed the needs for analog cordless phones. The
minimal amount of external components and absence of any external adjustments makes
for a very economical solution.
2. Features and benefits
Low power consumption: 3.5 mA typical at 3 V
Mixer input to > 100 MHz
Mixer conversion power gain of 17 dB at 45 MHz
XTAL oscillator effective to 100 MHz (LC oscillator or external oscillator can be used at
higher frequencies)
102 dB of IF amplifier/limiter gain
2 MHz IF amp/limiter small signal bandwidth
Temperature compensated logarithmic Received Signal Strength Indicator (RSSI) with
a 70 dB dynamic range
Low external component count; suitable for crystal/ceramic/LC filters
Audio output internal op amp
RSSI output internal op amp
Internal op amps with rail-to-rail outputs
ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per
JESD22-C101
Latch-up testing is done to JEDEC Standard JESD78 Class II, Level B
3. Applications
Cordless telephones
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