DATASHEET
Quantum
™
LN CSAC
Low Noise Chip Scale Atomic Clock
Key Features
• Power consumption ≤275 mW
• Less than 46 cc volume, 2.0" x 2.0" x 0.70"
• 10 MHz Sine Wave output
• 1 PPS output and 1 PPS input for
synchronization
• RS-232 interface for monitoring and
control
• Short term stability (Allan Deviation) of
≤2E-11 @ TAU = 1 sec
• Phase Noise - sine wave
≤-87 dBc/Hz @ 1 Hz
≤-120 dBc/Hz @ 10 Hz
≤-140 dBc/Hz @ 100 Hz
≤-145 dBc/Hz @ 1kHz
≤-150 dBc/Hz @ 10 kHz
≤-155 dBc/Hz @ ≥100 kHz
The Low Noise Chip Scale Atomic Clock
(LN CSAC) combines the accuracy of an
atomic clock with the spectral purity of an
ovenized crystal oscillator in a compact size
requiring low input power.
Microsemi
®
, the developer of the CSAC, has
incorporated a low power OCXO within the
frequency control loop of the atomic clock
enabling exceptional performance for both
Allan Deviation and Phase Noise. This level
of performance cannot be achieved using
external phase locked loops.
The LN CSAC provides a 10 MHz sine wave
output and 1 PPS output, with short-term
stability [Allan Deviation] of
≤
2E-11 @ 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 LN 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 LN 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 RS-232 serial interface is built
in to the LN CSAC. 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
LN CSAC’s internal time-of-day clock.
The LN CSAC acts as a frequency and
timing subsystem while requiring limited
size, weight and power.
Key Applications
• Underwater sensor systems
• GPS receivers
• Dismounted radios
• Dismounted IED jamming systems
• Autonomous sensor networks
• Unmanned vehicles
Microsemi invented portable atomic timekeeping
with QUANTUM™, the worldʼs first family of
miniature and chip scale atomic clocks.
Choose QUANTUM™ class for best-in-class
stability, size, weight and power consumption.
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MICROSEMI [ MICROSEMI CORPORATION ]
