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Simple, Accurate & Tiny PWM Clock Covers 3.81Hz to 1MHz
MILPITAS, CA - September 23, 2010 - Linear Technology announces
the LTC6992 silicon oscillator, the latest
member of the TimerBloxTM family of silicon timing devices. The
LTC6992 offers simple and accurate pulse width modulation (PWM)
capability for output frequencies from 3.81Hz to 1MHz. The device's
frequency is programmed using 1 to 3 resistors, with guaranteed
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 1V. The LTC6992 offers glitch-free, first cycle accurate
startup within 500us of power on.
Four versions of the LTC6992 are available, each offering a unique
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 LTC6992 is
well suited for heater control, PWM servo loops, LED dimming,
signal isolation and other duty cycle control applications.
The LTC6992 is part of the TimerBlox family of versatile 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.
TimerBlox 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 20mA source and sink
capability enables direct drive of opto-isolators and transformers
for electrical isolation. Fully specified over the temperature
range of -40°C to 125°C, the TimerBlox parts are suitable for
demanding automotive and industrial environments where many
oscillators and microcontrollers are unable to operate. The small
SOT23 footprint allows each timing device to be placed at the point
of use, without routing signals over long distances, and provides
an ideal timer for space-limited applications such as handheld and
portable devices.
"With the LTC6992, generating a PWM signal is extremely easy," says
Doug LaPorte, Design Manager for Linear Technology. "No
microcontroller and no programming is necessary."
The LTC6992 is now available, priced starting at $1.55 each in
1,000-piece quantities. For more information, visit www.linear.com/6992.
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Summary of Features: LTC6992
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LTC6992 Simple & Accurate |
