Quantum™ SA.45s CSAC
Chip Scale Atomic Clock
Microsemi invented portable atomic
timekeeping with QUANTUM
TM
, the world’s
first family of miniature and chip scale
atomic clocks.
Choose QUANTUM
TM
class for best-in-
class stability, size, weight, and power
consumption.
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 3.0E
–10
@ TAU = 1 sec, typical
long-term aging of <9E
–10
/month, and maximum frequency change of ±5E
–10
over an operating temperature range of –10 °C to 70 °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.
It 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.
Features
•
•
•
•
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
3.0E
–10
@ TAU =1 sec
Applications*
•
•
•
•
•
•
•
GPS receivers
Backpack radios
Anti-IED jamming systems
Autonomous sensor networks
Unmanned vehicles
Underwater sensor systems
Stability for various other communication and
transmission applications
*The Chip Scale Atomic Clock is not tested,
qualified, and rated for space applications
MICROSEMI [ MICROSEMI CORPORATION ]
