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

Low-Jitter Spread-Spectrum Clock Modulator Reduces EMI in Large-Format LCD Panels

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

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Key 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

Applications/Uses

  • Automotive Telematics and Infotainment
  • LCD Panels for TVs, Desktop Monitors, Notebook and Tablet PCs
  • Printers

Description

The DS1083L is a spread-spectrum clock modulator IC that reduces EMI in high-clock, frequency-based, digital 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 frequency at a pin-selectable magnitude. The DS1083L automatically 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 associated 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.

Simplified Block Diagram

DS1083L: Block Diagram DS1083L: Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .