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IMI4343YB Datasheet

  • IMI4343YB

  • Phase/Frequency Detector

  • 7頁

  • ETC

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IMI4343
June 1997
PHASE DETECTOR
CMOS LSI
PLL FREQUENCY SYNTHESIZERS
PRODUCT DESCRIPTION
The IMI4343 is a member of a family of phase lock
loop synthesizer ICs from International Microcircuits.
This is a phase-frequency detector intended for use
with high reference frequencies. Compatible with
sinewave, ECL, TTL, and CMOS input waveforms,
makes the IMI4343 extremely versatile in PLL
applications.
The IMI4343 has a Type IV phase frequency detector
which has eliminated by design the inherent dead zone
which causes crossover distortion at the critical center
lock point. The IMI circuitry enables consistent low
noise loop designs using the simple single ended
charge pump output. Differential charge pump outputs
are also provided for those who require a more
sophisticated differential active loop filter design.
PRODUCT FEATURES
T
T
T
T
T
T
T
T
T
T
T
T
T
T
Useful input frequency > 50 MHz
Low power consumption CMOS
-163 dBc/Hz total phase noise floor
No dead zone, by design
High gain differential outputs
380
碌A(chǔ)
Current Mode Charge Pump
Unambiguous PLL acquisition
Zero degree phase difference at lock
ECL compatible inputs when AC coupled
Sinewave inputs when AC coupled
TTL, CMOS inputs can be DC coupled
On-chip 3rd overtone reference oscillator
Small SO-8 package for SMT available
3-volt and 5-volt characterizations
BLOCK DIAGRAM
VDD
8
OSCout 2
PFD
7
PDout
OSCin 1
1
2
1
2
PHIR
3
Phase
Freq.
Detector
5
PHIV
Fin
VSS
6
4
1
2
1
2
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.
MILPITAS, CA 95035 TEL: 408-263-6300 FAX 408-263-6571
Rev 1.1
6/9/97
Page 1 of 7

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