Chapter 486

SOT-23 1kHz to 30MHz oscillator with single resistor frequency set

Andy Crofts

Abstract

A SOT-23 1kHz to 30MHz oscillator with single resistor frequency set is described.

Keywords

Resistor-programmed oscillator

LTC1799

The LTC1799 resistor-programmed oscillator eliminates the hassle in designing an accurate square-wave frequency reference. A single resistor (RSET) connected between the power supply and an input pin (SET) programs the frequency of a master oscillator to a value between 100kHz and 30MHz. An internal clock divider is programmed using a three-state input pin (DIV) to divide the master oscillator frequency by 1, 10 or 100 before driving the output. This extends the lower limit to 1kHz for a total range of 1kHz ...

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