DS1083L 查看數據表（PDF） - Maxim Integrated

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DS1083L

16MHz to 134MHz Spread-Spectrum Clock Modulator for LCD Panels

Maxim Integrated 

Rev 0; 5/07

16MHz to 134MHz Spread-Spectrum

Clock Modulator for LCD Panels

General Description

The DS1083L is a spread-spectrum clock modulator IC

that reduces EMI in high-clock, frequency-based, digi-

tal electronic equipment.

Using an integrated phase-locked loop (PLL), the

DS1083L accepts an input clock signal in the range of

16MHz to 134MHz and delivers a spread-spectrum

modulated output clock signal. The PLL modulates, or

dithers, the output clock about the center input frequen-

cy at a pin-selectable magnitude. The DS1083L auto-

matically adjusts the dither rate based on the input

clock frequency to maximize the EMI reduction.

By dithering the system clock, all the address, data,

and timing signals generated from this signal are also

dithered so that the measured EMI at the fundamental

and harmonic frequencies is greatly reduced. This is

accomplished without changing clock rise/fall times or

adding the space, weight, design time, and cost asso-

ciated with mechanical shielding.

The DS1083L is provided in a low-cost, space-saving,

6-lead thin SOT23 package and operates over a full

automotive temperature range of -40°C to +125°C.

Applications

LCD Panels for TVs, Desktop Monitors, Notebook

and Tablet PCs

Automotive Telematics and Infotainment

Printers

Pin Configuration and Typical Operating Circuit appear at

end of data sheet.

Features

♦ Modulates a 16MHz to 134MHz Clock with Center

Spread-Spectrum Dithering

♦ Selectable Spread-Spectrum Modulation

Magnitudes of:

±0.5%

±1%

±1.5%

±2%

♦ Low 75ps Cycle-to-Cycle Jitter

♦ Automatic Dither Cycle Rate Adjustment to

Maximize EMI Reduction

♦ Low Cost

♦ Low Power Consumption

♦ 3.3V Single Voltage Supply

♦ -40°C to +125°C Operating Temperature Range

♦ Small 6-Lead Thin SOT23 Package

Ordering Information

PART

TEMP RANGE

DS1083LR+T

-40°C to +125°C

+Denotes a lead-free package.

T = Tape and reel.

PIN-PACKAGE

6 Thin SOT23

Block Diagram

CLKIN

fIN = 16MHz TO

134MHz

VCC

DS1083L

PLL WITH CENTER-

SPREAD

DITHERING

RPU

SMSEL1

SMSEL2

CLOCK RATE

RPU

DETECT

CONFIGURATION

DECODE AND

CONTROL

SSO

fSSO = 16MHz to

134MHz (DITHERED)

VCC

VCC

GND

________________________________________________________________ Maxim Integrated Products 1

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.

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