KB8821 Datasheet, PDF (1/21 Pages) Samsung semiconductor – FREQUENCY SYNTHESIZER

PRELIMINARY SPECIFICATION (V1.5)
FREQUENCY SYNTHESIZER
KB8821/22/23
INTRODUCTION
The KB8821/22/23 are high performance dual frequency syn-
thesizers with integrated prescalers designed for RF operation
20-TSSOP-225
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.
ORDERING INFORMATION
FEATURES
Device
Package Tem. Range
• 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
(RF) 64/65 or 128/129
KB8823
KB8821/22/23
(RF) 32/33 or 64/65
(IF) 8/9 or 16/17
• Programmability via serial bus interface
• No dead-zone PFD
• Variable charge pump output current
• High speed lock mode
KB8821/22/23 20-TSSOP-225 -40 ~ +85°C
KB8821/22/23
24-QFN* -40 ~ +85°C
* 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
BLOCK DIAGRAM
finRF ₊
finRF
-
CLOCK
LE
DATA
OSCin
finIF
+
finIF
-
RF
Prescaler
RF
N Counter
Serial Data Control
RF
R Counter
IF
R Counter
IF
Prescaler
IF
N Counter
RF
Phase
Detector
RF _CPoRF
Charge
Pump
RF
LD
foLD
Data Out
Multiplexer
foLD
IF
Phase
Detector
IF
LD
IF
Charge
CPoIF
Pump
Figure 1. BLOCK DIAGRAM
99-06-15
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