DATA SHEET
SA.31m, SA.33m, and SA.35m
TM
Quantum Miniature Atomic Clock (MAC)
Miniature Rubidium Atomic Clock
Newly Enhanced SA.31m
Features
TM
Quantum MAC SA.3X
The SA.31m is targeted for applications
High precision atomic clock
that require an economical solution for
Family
Smallest form factor (smaller than
frequency stability, such as audio equipment
most OCXOs)
The Microsemi SA.3Xm marks a major
in studio applications. It can also be used
Standard quartz oscillator pinouts
step forward in the evolution of rubidium
as an independent frequency source for
Low power consumption
atomic clocks. Based on a new generation
next generation base stations, smart grid
of atomic clock technology, the SA.3Xm
RoHs 6/6 compliant
infrastructure and Enterprise network
family has a unique package that enables
infrastructure. It enables transition from
Applications
unprecedented miniaturization in a rubidium
costly TDM backhaul transport to economic
Stand-alone (free-run) stable frequency
clock. It is suitable for applications requiring
and efficient Ethernet transport.
source for audio equipment, LTE base
compact design, low power consumption,
stations, smart grid and enterprise
network Infrastructure extended aging, and precision in an
economical and easily adaptable package. SA.33m
Extended holdover for CDMA and
WiMAX base stations
The SA.33m has superior aging and tempco,
Stability for various other
Smallest Commercially
and better stability and phase noise than
communication and transmission
Available Rubidium Clock the SA.31m. The SA.33m may be deployed
applications
in existing rubidium applications such as
Microsemi has leveraged the significant
extended holdover (for CDMA / CDMA 2000
advances in miniaturization and integration
or WiMAX).
to design the world's first commercially
available miniature atomic clock. The SA.3Xm
SA.35m
has physical dimensions and packaging of
a small ovenized crystal oscillator (OCXO),
The SA.35m is the premium grade of the
measuring 50.8 mm x 50.8 mm (2" 2")
entire SA.3Xm family. It has the best tempco
and standing at a mere 18.3 mm (0.72").
and greatest performance amongst all
The MAC is the worlds first commercially
the versions of the family. The SA.35m is
available Rubidium Coherent Population
suited for applications such as extended
Trapping atomic clock. It consumes less
hold over for LTE-TDD base stations and
power and has wide-spectrum temperature
other applications that require precision
Microsemi invented portable atomic
TM operation. This makes it useful for a range
timekeeping with QUANTUM , the worlds frequency and long hold-over. Economical
first family of miniature and chip scale
of timing and synchronization applications
for its performance level, the SA.35m delivers
atomic clocks.
wireless base station, wire line network
premium performance at an excellent price.
TM
Choose QUANTUM class for best-in-
infrastructure, defense system, and test and
class stability, size, weight, and power
measurement devices. The small size of the
consumption.
SA.3Xm enables it to be easily mounted to
a PCBA.
1DATA SHEET
SA.31m, SA.33m, and SA.35m
. .
. .
. .
Specifications . .
. .
. .
. .
. .
Electrical Specification
Environmental
. .
. .
Output Frequency/Waveform: 10 MHz . Aging: .
Operating temperature: -10C to +75C
. .
. .
3.3 Vpp (Max = 4 Vpp) . .
Type SA.35m/SA.33m SA.31m base-plate
. .
. .
ACMOS
. . Magnetic field sensitivity: <7E-11/Gauss (up to
Daily* 2.5E-11 4E-11
. .
square wave (15 pF load)
. .
2 Gauss)
. .
Monthly* 1E-10 3E-10
. .
Logic Level: VL <0.5 V, VH >2.7 V
. .
Humidity: GR-63-CORE, issue 4,
. .
Yearly 1E-9 1.5E-9
(15 pf load)
. .
. . April 2012, section 4.1.2
. .
(*After 1 day and 1 month of operation respectively)
Rise/Fail Time: <10 ns
. .
. .
Vibration (operating): 7.7 grms, @ 1 hour/axis
. .
Duty Cycle: 50%+/-10% Short Term Stability (Allan deviation):
. .
MIL-STD-810, figure
. .
. .
Phase Noise (SSB) Type SA.35m / SA.33m SA.31m
. . 514.7E-1, category 24
. .
. .
SA.35m/SA.33m SA.31m t=1 s 3E-11 5E-11 (General Minimum
. .
. .
. . Integrity Exposure)
1 Hz <-70 dBc/Hz <-65 dBc/Hz
t=10 s 1.6E-11 2.5E-11
. .
. .
No loss of lock
10 Hz <-87 dBc/Hz <-85 dBc/Hz . .
t=100 s 8E-12 1E-11
. .
. .
Shock (operating): 30 g, 11 ms half-sine
100 Hz <-114 dBc/Hz <-112 dBc/Hz . .
Time drift in a 24 hr period
. .
pulse per MIL-STD-202,
. .
1 kHz <-130 dBc/Hz <-130 dBc/Hz
. (SA.33m and SA.35m only): <7 s over 0C to +60C .
. .
Method 213, Test
. .
10 kHz <-140 dBc/Hz <-140 dBc/Hz
. .
MTBF:
Condition J. Frequency
. .
. .
Spurious:
. Per MIL-HDBK-217F: . perturbation 1e-9
. .
. .
momentary
Non-Harmonic: <-85 dBc 20 years @ 40C (Ground, benign, GB)
. .
. .
. 17 years @ 40C (Ground, fixed, GF) .
Temperature Coeffient [peak to peak]: Storage and transport (non operating):
. .
. .
. Per Telcordia SR-332, Issue 1: .
SA.35m SA.33m SA.31m
Temperature: -55C to +100C
. .
. .
20 years @ 40C (Ground, fixed, uncontrolled)
. .
(0C to 70C) 7E-11 1E-10 7E-10
Vibration (non-operating
. .
. .
Connector: 5 Pins match standard OCXO configurations
(-10C to 75C) 1E-10 1.5E-10 1E-9 . . unpackaged): 10.9 grms @ 1 hour/axis
. .
. .
per MIL-STD-810, figure
Pin 1: Input frequency control
. .
Accuracy at shipment: <5E-11 (25C)
. .
. Pin 2*: Baseplate (connect to GND externally) . 514.7E-1, Cat 24
Retrace: <5E-11(on-off- . .
. .
Pin 3: Output signal
. . Shock (non-operating
on: 24 hour, 48 hour,
. .
Pin 4*: Ground (signal and supply)
. .
unpackaged): 50 g, 11 ms half-sine
12 hour @25C)
. .
. .
Pin 5: Input supply (+)
. . pulse per MIL-STD-202,
Control range:
. .
*Pin 2 and Pin 4 are not connected together internally
. .
Method 213, Test
. .
With analog input: 1E-8, 0-5 V into 5 k
. .
Three (3) additional pins for added functionality: Condition A
. .
. .
With digital input: 2E-8 (with resolution
. .
Pin 6: BITE
. .
1E-12)
. . Physical
. .
Pin 7: RS232 transmit (Tx)
. .
Warm-up time: time to <1E-9 @25C:
. .
Weight: <85 g (<3 oz)
Pin 8: RS232 receive (Rx)
. .
<7.5 min (if mounted
. .
. .
Size: 18.3 mm x 50.8 mm x 50.8 mm
on the developers kit . .
. .
. .
heat sink: 9 min) (0.72" 2" 2")
. .
. .
3 3
. .
Supply voltage/current: +5 Vdc 0.1 Vdc, Volume: <49.5 cm (< 3.0 in )
. .
. .
Max. current <2.8 A
. .
. .
. . RoHS Compliance
Power consumption: Warm-up: 14 W max
. .
.
(-10C to +75C);
. SA.31m, SA.33m, and SA.35m are 6/6
.
.
RoHS compliant
Operating: 8 W @ 10C,
.
.
5 W @ 25C, .
.
.
5 W @ 75C baseplate
.
.
Voltage coefficient: +5 Vdc 0.1 Vdc: .
.
.
Magnitude (df/f)
.
.
<2E-11 peak-to-peak
.
.
.
Test/status: Built-in self-test (BITE)
.
.
.
ACMOS: Service/fault-unlock
.
.
.
Serial Port: Microsemi specific
.
.
serial port protocol for
.
.
status and control
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
2