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KB8821

Samsung
Part Number KB8821
Manufacturer Samsung
Description FREQUENCY SYNTHESIZER
Published Apr 25, 2005
Detailed Description PRELIMINARY SPECIFICATION (V1.5) FREQUENCY SYNTHESIZER INTRODUCTION The KB8821/22/23 are high performance dual frequenc...
Datasheet PDF File KB8821 PDF File

KB8821
KB8821


Overview
PRELIMINARY SPECIFICATION (V1.
5) FREQUENCY SYNTHESIZER INTRODUCTION The KB8821/22/23 are high performance dual frequency synthesizers with integrated prescalers designed for RF operation up to 1.
2GHz/2.
0GHz/2.
5GHz and IF operation up to 520MHz.
The KB8821/22/23 contain dual-modulus prescalers.
The RF synthesizer adopts a 64/65 or an 128/129 prescaler(32/33 or 64/65 for the KB8823) and the IF synthesizer adopts an 8/9 or a 16/17 prescaler.
Using a proprietary digital phase-locked-loop technique, the KB8821/22/23 have 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 KB8821/22/ 23 are now available in a 20-TSSOP/24-QFN package.
20-TSSOP-225 KB8821/22/23 ORDERING INFORMATION Device KB8821/22/23 KB8821/22/23 Package 24-QFN* Tem.
Range -40 ~ +85°C 20-TSSOP-225 -40 ~ +85°C FEATURES • Very low current consumption(8821:3.
5mA, 22:4.
5mA, 23:5.
5mA) • Operating voltage range : 2.
7 ~ 4.
0V • Selectable power saving mode(Icc=1uA typical @3V) • Dual modulus prescaler : KB8821/22 KB8823 KB8821/22/23 (RF) 64/65 or 128/129 (RF) 32/33 or 64/65 (IF) 8/9 or 16/17 * QFN : Quad Flat Non-leaded(see Addendum).
APPLICATIONS • Cellular telephone systems : KB8821 • Portable wireless communications : KB8822 (PCS/PCN, cordless) • Wireless Local Area Networks (W-LANs) : KB8823 • Other wireless communication systems • Programmability via serial bus interface • No dead-zone PFD • Variable charge pump output current • High speed lock mode BLOCK DIAGRAM finRF finRF + RF Prescaler RF N Counter RF Phase Detector RF LD CLOCK LE DATA Serial Data Control foLD Data Out Multiplexer foLD RF Charge Pump CPoRF RF R Counter OSCin IF R Counter finIF finIF + IF Prescaler IF N Counter IF Phase Detector IF LD IF Charge Pump CPoIF Figure 1.
BLOCK DIAGRAM 99-06-15 1 PRELIMINARY SPECIFICATION (V1.
5) FREQUENCY SYNTHESIZER BLOCK DIAGRAM- Continued KB8821/22/23 VDD1 1 RF LD foLD Data Out Multiplexer IF ...


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