Key Features• Power consumption <120 mW• Less than 17 cc volume, 1.6” x 1.39” x 0.45”• Aging <3.0E-10/month• 10 MHz CMOS-compatible output• 1 PPS output and 1 PPS input for synchronization• Hermetically sealed• RS-232 interface for monitoring and controlApplications• Underwater sensor systems• GPS receivers• Dismounted military radios• Anti-IED jamming systems• Autonomous sensor networks• Unmanned vehiclesWith an extremely low power consumption of <120 mW and a volume of <17 cc, the Symmetricom® 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 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. Page 1 of 10SA.45s CSACChip Scale Atomic ClockThe 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.DATA SHEETSymmetricom invented portable atomic...
