Samsung semiconductor S1M8831A
The S1M8831A RF synthesizer adopts an 8/9 prescaler (16/17 for the S1M8833) and the IF synthesizer adopts an 8/9 prescaler.FEATURES
● High operating frequency dual synthesizer — S1M8831A: 0.71 to 1.2GHz(RF)/ 45 to 520MHz(IF) — S1M8833: 1.6 to 1.65GHz(RF)/ 45 to 520MHz(IF)●
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● Operating voltage range: 2.7 to 4.0V Low current consumption (S1M8831A: 5.0mA, S1M8833: 7.0mA) Selectable power saving mode (ICC = 1uA typical @ 3V) Dual-modulus prescaler and Fractional-N/Integer-N: — S1M8831A — S1M8833 — S1M8831A/33
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● (RF) 8/9 (RF) 16/17 (IF) 8/9 Fractional-N Fractional-N Integer-N Excellent in-band phase noise ( – 85dBc/Hz @ PCS, -90dBc/Hz @CDMA) Improved fractional spurious performance ( < 80dBc) Frequency resolution (= 10kHz/64 @ fref = 9.84MHz) Fast channel switching time: < 500us Programmable charge pump output current: from 50uA to 800uA in 50uA steps Programmability via on-chip serial bus interface 1 S1M8831A/33 FRACTIONAL-N RF/INTEGER-N IF DUAL PLL
APPLICATIONS
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● High-rate data-service cellular telephones (for CDMA): S1M8831A, S1M8833 High-rate data-service portable wireless communications (f...