General 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.

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

    LCD Panels for TVs, Desktop Monitors, Notebook and Tablet PCs

    Automotive Telematics and Infotainment

    Printers