LTC1799 Datasheet | Linear Technology

LTC1799 1k Hz to 33MHz Resistor Set SOT-23 Oscillator Features n One External Resistor Sets the Frequency n Fast Start-Up Time: <1ms n 1k Hz to 33MHz Frequency Range n Frequency Error ≤1.5% 5k Hz to 20MHz (TA = 25°C) n Frequency Error ≤2% 5k Hz to 20MHz (TA = 0°C to 70°C) n ±40ppm/°C Temperature Stability n 0.05%/V Supply Stability n 50% ±1% Duty Cycle 1k Hz to 2MHz n 50% ±5% Duty Cycle 2MHz to 20MHz n 1m A Typical Supply Current n 100Ω CMOS Output Driver n Operates from a Single 2.7V to 5.5V Supply n Low Profile (1mm) SOT-23 (Thin SOT™ Package) n AEC-Q100 Qualified for Automotive Applications APPLICATIONS n Low Cost Precision Oscillator n Switching Power Supply Clock Reference n Clocking Switched Capacitor Filters n Fixed Crystal Oscillator Replacement n Ceramic Oscillator Replacement All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. Patents including 6342817 and 6614313. DESCRIPTION The LTC®1799 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 ponents. 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 100k Hz 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 1k Hz 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. The oscillator can be easily...