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PE3238 Datasheet(PDF) 1 Page - Peregrine Semiconductor Corp.

Part No. PE3238
Description  1500 MHz UltraCMOS™ Integer-N PLL for Low Phase Noise Applications
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Maker  PEREGRINE [Peregrine Semiconductor Corp.]
Homepage  http://www.peregrine-semi.com
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PE3238 Datasheet(HTML) 1 Page - Peregrine Semiconductor Corp.

 
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Document No. 70-0031-03
│ www.psemi.com
Page 1 of 15
©2003-2005 Peregrine Semiconductor Corp. All rights reserved.
Peregrine’s PE3238 is a high performance integer-N PLL
capable of frequency synthesis up to 1.5 GHz. The
superior phase noise performance of the PE3238 is ideal
for applications such as LMDS / MMDS / WLL basestations
and demanding terrestrial systems.
The PE3238 features a 10/11 dual modulus prescaler,
counters and a phase comparator as shown in Figure 1.
Counter values are programmable through either a serial or
parallel interface and can also be directly hard wired. This
programming flexibility, combined with the dual latch
architecture enabling ping-pong loading of the main divide
counter, makes these PLLs well suited as the core for
fractional-N or sigma-delta implementation.
The PE3238 is optimized for terrestrial applications. It is
manufactured on Peregrine’s UltraCMOS™ process, a
patented variation of silicon-on-insulator (SOI) technology
on a sapphire substrate, offering the performance of GaAs
with the economy and integration of conventional CMOS.
Product Specification
1500 MHz UltraCMOS™ Integer-N PLL
for Low Phase Noise Applications
Product Description
PE3238
Features
1.5 GHz operation
÷10/11 dual modulus prescaler
Internal phase detector
Serial, parallel or hardwired
programmable
Low power ¾ 20 mA at 3 V
Q3236 PLL replacement
Ultra-low phase noise
Figure 1. Block Diagram
F
in
F
in
Prescaler
10 / 11
20
Main
Counter
20
Secon-
dary
20-bit
Latch
20
Primary
20-bit
Latch
Pre_en
M(6:0)
A(3:0)
R(3:0)
16
20
R Counter
f
r
Phase
Detector
6
6
f
c
f
p
8
D(7:0)
13
Sdata
PD_U
PD_D


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