LTC6900 Datasheet | Linear Technology

LTC6900 Low Power, 1k Hz to 20MHz Resistor Set SOT-23 Oscillator Features One External Resistor Sets the Frequency s 1k Hz to 20MHz Frequency Range s 500µA Typical Supply Current, V = 3V, 3MHz S s Frequency Error ≤ 1.5% Max, 5k Hz to 10MHz (TA = 25°C) s .. Frequency Error ≤ 2% Max, 5k Hz to 10MHz (TA = 0°C to 70°C) s ± 40ppm/°C Temperature Stability s 0.04%/V Supply Stability s 50% ± 1% Duty Cycle 1k Hz to 2MHz s 50% ± 5% Duty Cycle 2MHz to 10MHz s Fast Start-Up Time: 50µs to 1.5ms s 100Ω CMOS Output Driver s Operates from a Single 2.7V to 5.5V Supply s Low Profile (1mm) Thin SOTTM Package s DESCRIPTIO The LTC®6900 is a precision, low power 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 LTC6900 has been designed for high accuracy operation (≤ 1.5% frequency error) without the need for external trim ponents. The LTC6900 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 10kΩ to 2MΩ to select a master oscillator frequency between 100k Hz and 20MHz (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 20MHz (5V supply). The LTC6900 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 programmed using the simple formula outlined below: f OSC 100, DIV Pin = V +  20k   = 10MHz -   , N = 10, DIV Pin = Open  N - RSET  1  , DIV Pin = GND U APPLICATIO S s s s s s s s s s Portable and Battery-Powered Equipment PDAs Cell Phones Low Cost Precision Oscillator Charge Pump Driver Switching Power Supply Clock...