Overview

Features and Benefits

  • 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)

Product Details

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
  • Charge Pump Driver
  • Switching Power Supply Clock Reference
  • Clocking Switched Capacitor Filters
  • Fixed Crystal Oscillator Replacement
  • Ceramic Oscillator Replacement
  • Small Footprint Replacement for Econ Oscillators

Product Categories

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (2)

Tools & Simulations

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.

LTspice

Models for the following parts are available in LTspice:

LTC1799

Design Tools

OscCalc Silicon Oscillator Selection & Synthesis Tool

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

Product Recommendations

LTC1799 Companion Parts

Recommended µModule Isolator

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.