Datasheet > IMI145151YB

IMI145151YB

更新时间： 2024-09-15 23:58:39

品牌	Logo	应用领域
其他 - ETC		光电二极管
页数	文件大小	规格书
7页	134K
描述
Parallel-Input Frequency Synthesizer

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IMI145151YB 数据手册

IMI145151

FREQUENCY SYNTHESIZER

CMOS LSI

PARALLEL PROGRAMMED PLL FREQUENCY SYNTHESIZER

PRODUCT DESCRIPTION

PRODUCT FEATURES

The IMI145151 is a member of a family of phaselock loop synthesizer

ICs from International Microcircuits. The IMI145151 is an improved

version of the Motorola MC145151 and will provide a synthesizer with

noticeably improved performance.

>200 Mhz typical input frequency.

-163 dBc/Hz total phase noise floor.

No dead zone, by design.

The IMI145151 is programmed with parallel input data lines. Since it

does not require a microcontroller as serial and bus programmed units

do, the IMI145151 is an excellent choice for synthesizers requiring

independence from digital controllers. Such applications include fixed

local oscillator signals, whose tuning never changes, and signal sources,

which have few operating frequencies.

Unambiguous PLL acquisition.

Blocks in the IMI145151 include a programmable feedback divider, a

reference divider, phase detector, and charge pump. The reference

divider is programmed by three select lines to one of eight ROM

encoded values. Both counter inputs are biased for maximum sensitivity

to sinewave input signals. The reference divider input is also configured

to operate as a crystal oscillator if desired.

8 user-selectable reference divider ratios: 8, 128,

256, 512, 1024, 2048, 2410, 8192.

Lock detect signal.

The IMI145151 has a Type IV phase frequency detector which has

eliminated by the 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.

14 bit N counter. Divider range = 3 to 16383.

On- or off-chip reference oscillator operation.

3-volt and 5-volt characterizations.

Performance improvements are in the operating bandwidth and phase

detector noise floor. With its extremely low phase noise foor and wider

input bandwith, prescaler ratios can be minimized to allow wide loop

bandwidths for faster settling and lower phase noise.

BLOCK DIAGRAM

VDD = Pin 3

VSS = Pin 2

RA0

14x8 ROM Reference

RA1

RA2

Lock

Detect

Decoder

14 bit /8 Counter

OSCin

OSCout

Phase

PDout

Detector A

14 bit /N Counter

Fin

PHIV

Phase

Detector B

Transmit Offset Adder

PHIR

T/R

NOTE: N0 through N13 inputs have

pullup resistors not shown.

N13

N12 N11 N10

INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.

MILPITAS, CA 95035 TEL: 408-263-6300 ext. 276 FAX 408-263-6571

Rev 2.0

9/9/97

Page 1 of 7

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与IMI145151YB相关器件

型号	品牌	获取价格	描述	数据表
IMI145152028LK	ETC	获取价格	Parallel-Input Frequency Synthesizer
IMI145152028LT	ETC	获取价格	Parallel-Input Frequency Synthesizer
IMI145152028PB	ETC	获取价格	Parallel-Input Frequency Synthesizer
IMI145152028QB	ETC	获取价格	Parallel-Input Frequency Synthesizer
IMI145152028SK	ETC	获取价格	Parallel-Input Frequency Synthesizer
IMI145152028ST	ETC	获取价格	Parallel-Input Frequency Synthesizer
IMI145152028XB	ETC	获取价格	Parallel-Input Frequency Synthesizer
IMI145152CK	CYPRESS	获取价格	PLL Frequency Synthesizer, CMOS, CDIP28
IMI145152CT	CYPRESS	获取价格	PLL Frequency Synthesizer, CMOS, CDIP28
IMI145152PB	ETC	获取价格	Parallel-Input Frequency Synthesizer

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