S1M8821 Datasheet, PDF (1/22 Pages) Samsung semiconductor – INTERGER RF/IF DUAL PLL

INTERGER RF/IF DUAL PLL
INTRODUCTION
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
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.
20-TSSOP-BD44
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
(RF) 64/65 or 128/129
S1M8823
(RF) 32/33 or 64/65
S1M8821/22/23
(IF) 8/9 or 16/17
• Programmability via serial bus interface
• No dead-zone PFD
• Variable charge pump output current
• High speed lock mode
APPLICATIONS
• Cellular telephone systems : S1M8821
• Portable wireless communications : S1M8822 (PCS/PCN, cordless)
• Wireless Local Area Networks (W-LANs) : S1M8823
• Other wireless communication systems
S1M8821/22/23
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