DESCRIPTION
The LTC®6990 is a precision silicon oscillator with a programmable frequency range of 488Hz to 2MHz. It can be used as a fixed-frequency or voltage-controlled oscillator (VCO). The LTC6990 is part of the TimerBlox® family of versatile silicon timing devices.

FEATURES
■ Fixed-Frequency or Voltage-Controlled Operation
   – Fixed: Single Resistor Programs Frequency
      with <1.5% Max Error
   – VCO: Two Resistors Set VCO Center
      Frequency and Tuning Range
■ Frequency Range: 488Hz to 2MHz
■ 2.25V to 5.5V Single Supply Operation
■ 72µA Supply Current at 100kHz
■ 500µs Start-Up Time
■ VCO Bandwidth >300kHz at 1MHz
■ CMOS Logic Output Sources/Sinks 20mA
■ 50% Duty Cycle Square Wave Output
■ Output Enable (Selectable Low or Hi-Z When Disabled)
■ –55°C to 125°C Operating Temperature Range
■ Available in Low Profile (1mm) SOT-23 (ThinSOT™)
   and 2mm × 3mm DFN Package

APPLICATIONS
■ Low Cost Precision Programmable Oscillator
■ Voltage-Controlled Oscillator
■ High Vibration, High Acceleration Environments
■ Replacement for Fixed Crystal and Ceramic Oscillators
■ Portable and Battery-Powered Equipment