Milpitas, Calif. Linear Technology touts that its new silicon oscillator is the industry's fastest timing solution for FPGAs, CPLDs, microprocessors and DSPs. The LTC6905 resistor-set oscillator can generate clock signals from 17 MHz to 170 MHz using the SOT-23 device and one resistor. The output frequency is determined by the resistor, allowing generation of any frequency value over the entire range.
Packaged in a low profile thinSOT package, 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, which means no PLL is required to generate signals over the entire frequency range. As a result, clock jitter is 50 picoseconds (ps) at 170 MHz, with typical rise times of 500 ps. Frequency accuracy ±0.5% typical from 17 to 170 MHz (0°C to 70°C).
Operating from a single 2.7- to 5.5-V supply, the LTC6905 also offers a fast start-up time of 100 microseconds typical and consumes 6 mA of supply current running at 100 MHz. Temperature stability is competitive with most crystals at ±20 ppm/°C.
Because the LTC6905 is a standard silicon device, it offers inherent immunity to shock and vibration, a key advantage over crystals and ceramic oscillators, said the company. The new series is available with guaranteed specifications over the commercial (0°C to 70°C), industrial (-40°C to 85°C) and automotive (-40°C to 125°C) temperature ranges.
In addition, Linear Technology said purchasing is simplified. "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 time," stated Erik Soule, general manager for the Signal Conditioning Business Unit.
Prices start at $1.65 each in quantities of 1,000. All versions are in full production.
Call (408) 432-1900