LTC1799

PRODUCTION

1kHz to 33MHz Resistor Set SOT-23 Oscillator

Data Sheet (Rev. E) Product Selection Table
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Overview

  • One External Resistor Sets the Frequency
  • Fast Start-Up Time: <1ms
  • 1kHz to 33MHz Frequency Range
  • Frequency Error ≤1.5% 5kHz to 20MHz (TA = 25°C)
  • Frequency Error ≤2% 5kHz to 20MHz (TA = 0°C to 70°C)
  • ±40ppm/°C Temperature Stability
  • 0.05%/V Supply Stability
  • 50% ±1% Duty Cycle 1kHz to 2MHz
  • 50% ±5% Duty Cycle 2MHz to 20MHz
  • 1mA Typical Supply Current
  • 100Ω CMOS Output Driver
  • Operates from a Single 2.7V to 5.5V Supply
  • Low Profile (1mm) SOT-23 (ThinSOT™ Package)
  • AEC-Q100 Qualified for Automotive Applications

The LTC1799 is a precision oscillator that is easy to use and occupies very little PC board space. The oscillator frequency is programmed by a single external resistor (RSET). The LTC1799 has been designed for high accuracy operation (≤1.5% frequency error) without the need for external trim components.

The LTC1799 operates with a single 2.7V to 5.5V power supply and provides a rail-to-rail, 50% duty cycle square wave output. The CMOS output driver ensures fast rise/fall times and rail-to-rail switching. The frequency-setting resistor can vary from 3k to 1M to select a master oscillator frequency between 100kHz and 33MHz (5V supply). The three-state DIV input determines whether the master clock is divided by 1, 10 or 100 before driving the output, providing three frequency ranges spanning 1kHz to 33MHz (5V supply). The LTC1799 features a proprietary feedback loop that linearizes the relationship between RSET and frequency, eliminating the need for tables to calculate frequency.

Applications

  • Low Cost Precision Oscillator
  • Switching Power Supply Clock Reference
  • Clocking Switched Capacitor Filters
  • Fixed Crystal Oscillator Replacement
  • Ceramic Oscillator Replacement
LTC1799
1kHz to 33MHz Resistor Set SOT-23 Oscillator
LTC1799 Application Circuit LTC1799 Pin Configuration LTC1799 Performance Graph
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Application Note 4

Design Note 2

Technical Articles 5

Product Highlight 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Interface Transceivers & Isolators 1
LTM2883
PRODUCTION SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC1799

OscCalc Silicon Oscillator Selection & Synthesis Tool

OscCalc is a quick and easy tool to help you find the right silicon oscillator for your application.

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LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

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schematic 1
DC2073B-B

LTC1799 Silicon Oscillator Demo Board

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Product Details

DC2073B demo board features SOT23 packaged silicon oscillators. The DC2073B demo board is available in eleven different options; DC2073B-A through DC2073B-K. These eleven options provide for the evaluation of resistor-set oscillator ICs and fixed frequency ICs.
DC2073B-B
LTC1799 Silicon Oscillator Demo Board
DC2073B - Schematic

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