SA.45s Chip-Scale Atomic Clock Development Kit

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. The SA.45s provides 10 MHz and 1 PPS outputs at standard CMOS levels, with short-term stability (Allan Deviation) of 2.5E-10 @ TAU =1 sec, long-term aging of <9E-10/month, and maximum frequency change of 5E-10 over an operating temperature range of -10°C to +35°C. The SA.45s CSAC accepts a 1 PPS input that may be used to synchronize the unit’s 1 PPS output to an external reference clock with ±100 ns accuracy. The CSAC can also use the 1 PPS input to discipline its phase and frequency to within 1 ns and 1.0E-12, respectively. A standard CMOS-level RS-232 serial interface is built in to the SA.45s. This is used to control and calibrate the unit and also to provide a comprehensive set of status monitors. The interface is also used to set and read the CSAC’s internal time-of-day clock

• Power consumption <120 mW
• Less than 17 cc volume, 1.6” x 1.39” x 0.45”
• 10 MHz CMOS-compatible output
• 1 PPS output and 1 PPS input for synchronization
• RS-232 interface for monitoring and control
• Short term stability (Allan Deviation) of 2.5E-10@ TAU =1 sec