Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
EE Times-Asia > FPGAs/PLDs

Linear Tech unveils 'industry's fastest silicon oscillator'

Posted: 16 Nov 2004 ?? ?Print Version ?Bookmark and Share

Keywords:linear technology? silicon oscillator? fpga? cpld? microprocessor?

Touted by Linear Technology Corp. as the industry's fastest, this new silicon oscillator provides a simple, compact and robust timing solution for FPGAs, CPLDs, microprocessors and dsps.

The ltc6905 resistor-set oscillator can generate clock signals from 17MHz to 170MHz using only this SOT-23 device and one resistor. The output frequency is determined by the resistor, allowing generation of any frequency value over the entire range.

According to the company, the LTC6905 offers important advantages in high reliability applications. As a solid state CMOS device, it contains no internal mechanical resonating element. Standard silicon fabrication and assembly means that the device is inherently immune to shock and vibration, which is a key advantage over crystals and ceramic resonators. Versions of the LTC6905 are available with guaranteed specifications over the commercial (0C to 70C), industrial (-40C to 85C) and automotive (-40C to 125C) temperature ranges.

"Purchasing is also simplified," commented Erik Soule, GM for Linear Tech's Signal Conditioning Business Unit. "With the LTC6905, you can stock a standard device and multiple resistor values. Crystal oscillators, especially those with less common frequency values, can be expensive and have long lead-times."

The low jitter LTC6905 provides a stable frequency source over time and temperature. Internally, a proprietary feedback loop linearizes the relationship between the set resistor and frequency, meaning no PLL is required to generate signals over the entire 17MHz to 170MHz span. As a result, clock jitter is 50ps at 170MHz, with typical rise times of 500ps. In addition, temperature stability is 20ppm/C. The clock output starts up reliably and quickly (100?s), yet the device draws only 6mA of supply current running at 100MHz.

All versions are in full production, with pricing starting at $1.65 each in 1,000-piece quantities.

Article Comments - Linear Tech unveils 'industry's fast...
*? You can enter [0] more charecters.
*Verify code:


Visit Asia Webinars to learn about the latest in technology and get practical design tips.

Back to Top