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With an extremely low power consumption of <120 mW and a volume of <17 cc, the Microsemi® SA.45s Chip Scale Atomic Clock (CSAC) brings the accuracy and stability of an atomic clock to portable applications for the first time.

Product Information

Product Information

Atomic clock accuracy and low power make the SA.45s ideal for portable applications requiring precise synchronization and time keeping, especially in GPS-denied environments.

Breakthrough Leadership The CSAC’s unmatched portability derives from specs that include:

  • <120mW power consumption
  • <17cc volume 1.6" x 1.39" x 0.45"
  • 35g weight
  • ±5.0E-11 accuracy at shipment
  • σy < 5 x 10-12 at τ = 1 hour short-term stability (Allan Deviation)
  • <3.0E-10/month aging rate
  • 1 PPS output and 1 PPS input for synchronisation

A New Class of Applications At two orders of magnitude better accuracy than oven-controlled crystal oscillators (OCXOs) — and up to four orders of magnitude better accuracy than temperature-controlled oscillators (TCXOs) — the CSAC’s unmatched portability opens the door to new classes of applications, such as:

  • Underwater sensors for seismic research or gas and oil exploration
  • Military systems including dismounted IED jammers, dismounted radios, GPS receivers, and unmanned aerial vehicles (UAVs)

The SA.45s provides 10 MHz and 1 PPS outputs at standard CMOS levels, with short-term stability (Allan Deviation) of 1.5E-10 @ 1 sec, long-term aging of 3E-10/month, and maximum frequency change of 5E-10 over an operating temperature range of -10°C to +70°C. The unit can also be ordered with a wider temperature range (Option 002) of -40°C to +85°C, with slightly higher power consumption and a wider maximum frequency change over temperature.