DS1090U-32

Clock Generators, PLLs, Frequency Synthesizers Overview

The DS1090U-32 is a low-frequency, spread-spectrum clock generator from the EconOscil family. It features a single output with a maximum frequency of 250 kHz and supports input frequencies up to 8 MHz. The device operates on a supply voltage ranging from 3 V to 5.5 V, drawing a typical working current of 1.7 mA. Designed for surface-mount installation, it functions within an industrial temperature range of -40°C to +85°C. This component utilizes resistor programming to set output frequencies and dither parameters, facilitating emission reduction in switched-mode power supplies.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Spread-spectrum capability reduces peak radiated emissions at fundamental and harmonic frequencies
• Output frequency programmable from 125 kHz to 8 MHz via external resistor
• Dither percentage adjustable from 0% to 8% using control pins
• Low-power operation with 1.7 mA typical supply current

Clock Generators, PLLs, Frequency Synthesizers Applications

• External clock source for switched-mode power supplies
• Applications requiring spread-spectrum clocking to minimize electromagnetic interference
• Low-frequency timing circuits where emission reduction is critical

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status through the manufacturer's latest datasheet or product selection guide. Ensure the ordering part number matches the required frequency and dither settings before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a low-cost, resistor-programmable oscillator is needed for power supply applications. Verify that the required output frequency falls within the 125 kHz to 8 MHz range. Check if the 3 V to 5.5 V supply voltage range aligns with the system design. Consider the 8-pin μSOP package dimensions for PCB layout constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The DS1090U-32 belongs to the DS1090 series of low-frequency spread-spectrum oscillators. It shares core functionality with other variants in the series but differs in factory-set prescaler configurations and specific output frequency targets. The 'U' suffix typically denotes the μSOP package style used in this family.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Consult the official Analog Devices cross-reference list for verified substitutes. Generic low-frequency oscillators may not support the specific spread-spectrum dithering features or pin-compatible programming methods required by the original design.