S1M8822

INTERGER RF/IF DUAL PLL S1M8821/22/23 INTRODUCTION 20-TSSOP-BD44 The S1M8821/22/23 is a high performance dual frequency synthesizer with integrated prescalers designed for RF operation up to 1.2GHz/2.0GHz/2.5GHz and IF operation up to 520MHz. The S1M8821/22/23 contains dual-modulus prescalers. The RF synthesizer adopts a 64/65 or a 128/129 prescaler(32/33 or 64/65 for the S1M8823) and the IF synthesizer adopts an 8/9 or a 16/17 prescaler. Using a proprietary digital phase-locked-loop technique, the S1M8821/22/23 has linear phase detector characteristic and can be www.DataSheet4U.com used for very stable, low noise local oscillator signal. Supply voltage can range from 2.7V to 4.0V. The S1M8821/22/23 is now available in a 20-TSSOP/24-QFN package. 24-QFN-3.5×4.5 FEATURES High operating frequency dual synthesizer — S1M8821 : 0.1 to 1.2GHz (RF)/ 45 to 520MHz (IF) — S1M8822 : 0.2 to 2.0GHz (RF)/ 45 to 520MHz (IF) — S1M8823 : 0.5 to 2.5GHz (RF)/ 45 to 520MHz (IF) Very low current consumption(8821:3.5mA, 22:4.5mA, 23:5.5mA) Operating voltage range : 2.7 to 4.0V Selectable power saving mode(Icc=1uA typical @3V) Dual modulus prescaler : S1M8821/22 S1M8823 S1M8821/22/23 No dead-zone PFD Variable charge pump output current High speed lock mode (RF) 64/65 or 128/129 (RF) 32/33 or 64/65 (IF) 8/9 or 16/17 Programmability via serial bus interface APPLICATIONS Cellular telephone systems : S1M8821 Portable wireless communications : S1M8822 (PCS/PCN, cordless) ...