DS1083LR-U+

Overview

The DS1083LR-U+ is a spread-spectrum clock modulator IC designed to reduce electromagnetic interference (EMI) in digital electronic equipment. It utilizes an integrated phase-locked loop (PLL) to accept input clocks between 16MHz and 134MHz, delivering a center-dithered output. The device features selectable modulation magnitudes of ±0.5%, ±1%, ±1.5%, or ±2% via pin configuration. It operates on a single 3V to 3.6V supply, draws up to 15mA, and maintains low cycle-to-cycle jitter of 75ps. The component is housed in a TSOT-23-6 package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Modulates 16MHz to 134MHz input clocks with center spread-spectrum dithering
• Selectable spread-spectrum magnitudes: ±0.5%, ±1%, ±1.5%, ±2%
• Low 75ps peak cycle-to-cycle jitter
• Automatic dither rate adjustment based on input frequency

Applications

• LCD panels for TVs, desktop monitors, notebook, and tablet PCs
• Automotive telematics and infotainment systems
• Printers

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation, as suffixes may indicate variations in tape-and-reel packaging or lead-free status. Confirm current availability status directly with Analog Devices/Maxim Integrated distributors, as this component may be subject to end-of-life notices or limited stock conditions.

Selection Notes

Select the DS1083LR-U+ when EMI reduction is required without altering clock rise/fall times or adding mechanical shielding. Ensure the input clock frequency falls within the 16MHz to 134MHz range. Configure SMSEL1 and SMSEL2 pins to set the desired dither magnitude before power-up, as the PLL requires a power cycle to lock correctly upon frequency changes.

Part Context

The DS1083L series serves as a silicon oscillator alternative to crystals and ceramic resonators in high-clock frequency applications. It replaces discrete components to save space and design time while providing programmable spread-spectrum capabilities. The device integrates the PLL and control logic into a compact 6-lead thin SOT23 package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.