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S1M8831A

Part Number	S1M8831A
Manufacturer	Samsung semiconductor
Description	(S1M8831A / S1M8833) FRACTIONAL-N RF/INTEGER-N IF DUAL PLL
Published	Aug 16, 2008
Detailed Description	FRACTIONAL-N RF/INTEGER-N IF DUAL PLL S1M8831A/33 INTRODUCTION The S1M8831A/33 is a Fractional-N frequency synthesizer...
Datasheet	S1M8831A PDF File

Overview

FRACTIONAL-N RF/INTEGER-N IF DUAL PLL S1M8831A/33 INTRODUCTION The S1M8831A/33 is a Fractional-N frequency synthesizer with integrated prescalers, designed for RF operation up to 1.
2GHz/K-PCS and for IF operation up to 520MHz.
The fractional-N synthesizer allows fast-locking, low phase noise phase-locked loops to be built easily, thus having rapid channel switching and reducing standby time for extended battery life.
The S1M8831A/33 based on ∑ - ∆ fractional-N techniques solves the fractional spur problems in other fractional-N synthesizers based on charge pump compensation.
The synthesizer also has an additional feature that the www.
DataSheet4U.
com PCS/CDMA channel frequency in steps of 10kHz can be accurately programmed.
24-QFN-3.
5×4.
5 The S1M8831A/33 contains dual-modulus prescalers.
The S1M8831A RF synthesizer adopts an 8/9 prescaler (16/17 for the S1M8833) and the IF synthesizer adopts an 8/9 prescaler.
Phase detector gain is user-programmable for maximum flexibility to address IS-95 CDMA and IMT2000.
Various program-controlled power down options as well as low supply voltage help the design of wireless cell phones having minimum power consumption.
Using the Samsung's proprietary digital phase-locked-loop technique, the S1M8831A/33 has a linear phase detector characteristic and can be used for very stable, low noise PLLs.
Supply voltage can range from 2.
7V to 4.
0V.
The S1M8831A/33 is available in a 24-QFN package.
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) • • • • 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 • • • • • (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 fractio...

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