PE3293 Datasheet, PDF (1/18 Pages) List of Unclassifed Manufacturers – 1.8GHz/550MHz Dual Fractional-N Ultra-Low Spurious PLL for Frequency Synthesis

Product Description
The PE3293 is a dual fractional-N phase-lock loop (PLL)
IC designed for frequency synthesis and fabricated on
Peregrine’s patented UTSi® CMOS process. Each PLL
includes a prescaler, phase detector, charge pump and
on-board fractional spur compensation.
The patented spur compensation circuitry designed into
the device ensures superior spur performance over the
full temperature and VCO tuning range.
The PE3293 provides fractional-N division with power-of-
two denominator values up to 32. This allows
comparison frequencies up to 32 times the channel
spacing, providing a lower phase noise floor than integer
PLLs. The 32/33 RF prescaler (PLL1) operates up to 1.8
GHz and the 16/17 IF prescaler (PLL2) operates up to
550 MHz.
Applications
• Triple mode,dual-band PCS / Cellular handset
• PCS/CDMA/Cellular handsets
• PCS/CDMA/Cellular base stations
Figure 1. Block Diagram
PRODUCT SPECIFICATION
PE3293
1.8 GHz / 550 MHz Dual
Fractional-N Ultra-Low
Spurious PLL for Frequency
Synthesis
Features
• Industry leading fractional spur
compensation: no adjusting
required, stable over temp.
• Ultra-Low Power consumption:
4.0 mA typical, both loops
operating
• Modulo-32 fractional-N main
counters
• Supply voltage range 2.7 to 3.3
VDC
f_in1
32/33
Prescaler
19-bit Fractional-N
Main Divider
Fractional Spur
Compensation
f_r
Clock
Data
LE
Ref.
Amp.
9-bit Reference
Divider
21-bit Serial Control
Interface
Phase
Charge
CP1
Detector
Pump
Multiplexer
f_oLD
9-bit Reference
Divider
Phase
Charge
CP2
Detector
Pump
f_in2
16/17
Prescaler
18-bit Fractional-N
Main Divider
Fractional Spur
Compensation
PEREGRINE SEMICONDUCTOR CORP.  | http://www.peregrine-semi.com
Copyright  Peregrine Semiconductor Corp. 2003
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