Frequency Error ≤1.5% Max, 5kHz to 10MHz (TA = 25°C)
Frequency Error ≤ 2% Max, 5kHz to 10MHz (TA = 0°C to 70°C)
±40ppm/°C Temperature Stability
0.04%/V Supply Stability
50% ±1% Duty Cycle 1kHz to 2MHz
50% ±5% Duty Cycle 2MHz to 10MHz
Fast Start-Up Time: 50µs to 1.5ms
100Ω CMOS Output Driver
Operates from a Single 2.7V to 5.5V Supply
Low Profile (1mm) ThinSOT™ Package
LTC6900 Applications
Portable and Battery-Powered Equipment
PDAs
Cell Phones
Low Cost Precision Oscillator
Charge Pump Driver
Switching Power Supply Clock Reference
Clocking Switched Capacitor Filters
Fixed Crystal Oscillator Replacement
Ceramic Oscillator Replacement
LTC6900 Description
The LTC6900 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 components.
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 100kHz 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 1kHz 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.
