Linear Technology LTC6992 silicon oscillator

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Linear Technology has announced the LTC6992 silicon oscillator, the latest member of the TimerBlox family of silicon timing devices.

The device offers simple and accurate pulse width modulation capability for output frequencies from 3.81 Hz to 1 MHz. The device’s frequency is programmed using 1 to 3 resistors, with a frequency error less than 1.7%. In addition, the frequency can be dynamically controlled via a separate control voltage.

The output pulse width (duty cycle) is simply controlled with an analog signal from 0 to 1 V.

Four versions are available, each offering a combination of minimum/maximum duty cycle limits. The minimum duty cycle can be 0% or 5%, and the maximum duty cycle limit can be 95% or 100%. The 5% and 95% duty cycle limits ensure that the output will continue to toggle, irrespective of the control voltage, for applications unable to tolerate a DC control signal.

The oscillator is suitable for heater control, PWM servo loops, LED dimming, signal isolation and other duty cycle control applications.

The device is part of the TimerBlox family of silicon timing devices in which an accurate programmable oscillator is combined with precision circuitry and logic. No capacitors, no crystals, no microcontroller and no programming are required.

The devices are solid state and can be operated under high acceleration, vibration and temperature extremes. They offer higher accuracy, stability and lower power consumption than typical resistor/capacitor-based oscillators. The 20 mA source and sink capability enables direct drive of opto-isolators and transformers for electrical isolation.