Ultra low jitter high frequency SAW oscillator

Ultra low jitter high frequency SAW oscillator

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By Jean-Pierre Joosting

Packaged in an industry standard 5.0 x 7.5 mm footprint, this VCSO offers a jitter performance of 55 fs-rms over the offset bandwidth of 12 kHz to 20 MHz, with a frequency range of 600 MHz to 2.3 GHz. This product is ideal for emerging optical transport networks and supporting high speed ADCs that demand a low jitter high frequency reference clock.

Other features of the VS-708 include absolute pull range ±50ppm; LVPECL or LVDS compatible outputs (fN < 1.2 GHz); and differential sinewave compatible outputs (fN > 1.2 GHz). The device supports 3.3 V operation in a 5.0- x 7.5- x 2.0-mm package.

The SAW component is a high-Q Quartz device that enables the circuit to achieve low phase jitter performance over a wide operating temperature range. The oscillator is housed in a hermetically sealed leadless surface mount package and offered on tape and reel. It has a tri-state Output Enable function that provides one of three conditions: Outputs Enabled, Outputs Set, or Outputs Disabled.

Typical applications include high speed data converters, optical transport (200G and 400G), wireless communication, and cable modem termination systems (DOCSIS).

Performance characteristics at 1.2 GHz.
Performance characteristics at 2.2 GHz.

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