General Description

The DS1090 is a low-cost, dithered oscillator intended to be used as an external clock for switched-mode power supplies and other low-frequency applications. The dithering or sweeping function reduces peak-radiated emissions from the power supply at its fundamental frequency, as well as harmonic frequencies. The device consists of a resistor-programmed master oscillator, factory-programmed clock prescaler, and a pin-programmed dither circuit.

Features

● Low-Cost, Spread-Spectrum EconOscillator™

● Simple User Programming

● Output Frequency Programmable from 125kHz to 8MHz

● Dither Percentage Programmable from 0 to 8

● Dither Rate Programmable (fMOSC/512, 1024, 2048, or 4096)

● 3.0V to 5.5V Single-Supply Operation

● CMOS/TTL-Compatible Output

● Operating Temperature Range: -40°C to +85°C

Applications

● Switched-Mode Power Supplies

● Servers

● Printers

● Embedded Microcontrollers

● Industrial Controls