Rainbow-electronics MAX3673 Bedienungsanleitung PDF herunterladen

MAX3673

Low-Jitter Frequency Synthesizer

with Selectable Input Reference

________________________________________________________________

Maxim Integrated Products

19-4442; Rev 0; 2/09

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

General Description

The MAX3673 is a low-jitter frequency synthesizer that

accepts two reference clock inputs and generates nine

phase-aligned outputs. The device features 40kHz jitter

transfer bandwidth, 0.3ps

RMS

(12kHz to 20MHz) inte-

grated phase jitter, and best-in-class power-supply

noise rejection (PSNR), making it ideal for jitter clean-

up, frequency translation, and clock distribution in wire-

less base-station applications.

The MAX3673 operates from a single +3.3V supply and

typically consumes 400mW. The IC is available in an

8mm x 8mm, 56-pin TQFN package, and operates from

-40°C to +85°C.

Applications

3G Wireless Base Stations

Frequency Translation

Jitter Cleanup

Clock Distribution

Features

♦ Two Reference Clock Inputs: LVPECL

♦ Nine Phase-Aligned Clock Outputs: LVPECL

♦ Input Frequencies: 61.44MHz,122.88MHz,

245.76MHz, 307.2MHz

♦ Output Frequencies: 61.44MHz, 122.88MHz,

153.6MHz, 245.76MHz, 307.2MHz

♦ Low-Jitter Generation: 0.3ps

RMS

(12kHz to 20MHz)

♦ Clock Failure Indicator for Both Reference Clocks

♦ External Feedback Provides Zero-Delay Capability

♦ Low Output Skew: 20ps Typical

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX3673ETN+ -40°C to +85°C 56 TQFN-EP*

SIGNAL QUALIFIER

AND

LOCK DETECT

POWER-ON

RESET

(POR)

IN0FAIL

IN1FAIL

LOCK

REFCLK0

FB_INFB_SEL FB_IN

REFCLK1

DIV M

DMSEL_CLK

PFD CP

DIV N

DIV A

DIV B

VCO

2.457GHz61.44MHz

OUTA2

OUTA1

OUTA3

OUTA0

OUTB_EN

OUTA0

OUTA_ENPLL_BYPASS

OUTB3

OUTB2

OUTB4

OUTB1

OUTB0

PLL

0.1μF

REG

0.22μF

MAX3673

Functional Diagram

Denotes a lead(Pb)-free/RoHS-compliant package.

EP = Exposed pad.

Pin Configuration and Typical Application Circuits appear at

end of data sheet.

1 2 3 4 5 6 ... 15 16

Inhaltsverzeichnis

Seite 1 - Functional Diagram

MAX3673Low-Jitter Frequency Synthesizer with Selectable Input Reference________________________________________________________________Maxim Integrate

Seite 2 - ELECTRICAL CHARACTERISTICS

MAX3673Low-Jitter Frequency Synthesizer with Selectable Input Reference10 ____________________________________________________________________________

Seite 3