1. May 2018 FOCUS TELECOM SyncSmart SEMINAR 30 MAY 2018
CSAC & MAC update
May 2018
FOCUS TELECOM SyncSmart SEMINAR 30 MAY 2018

2. The Chip Scale Atomic Clock (CSAC)
The Microsemi SA.45s Chip Scale Atomic Clock brings the accuracy and stability of an atomic clock to portable applications
Key Specifications:
<120 mW Power Consumption
<17 cc in Volume
±5.0E-10 Tempco
<9.0E-10 month aging rate, typical
Operating Range: -10 to +70 deg C
180s warm-up time
1PPS disciplining
Low acceleration sensitivity

3. CSAC Update: RoHS 6/6 compliant New
CSAC full RoHS 6/6 version
Available since May 1 from the price list
Lead time 8 weeks for small sample quantities
New part numbers:
MHz
MHz
No other changes to the CSAC specs or performance or price
aside from Phase Noise relaxation for MHz version (at 100Hz)
Continue to manufacture and sell standard non-RoHS CSAC
Targeted at customers in America, APAC and non-EU countries in volume
Continue to deliver very good reliability and performance
Strong demand in Oil/gas geophysical survey and Defense markets
Plan to converge both CSAC parts on a common platform in future
Till such time, will carry two sets of CSAC parts in price list
Marketing collaterals
Datasheets, White Papers, User Guide

4. Space CSAC New Identical performance to CSAC
TCXO replaced and electronics radiation lot screened
Radiation Tolerance: 20Krad
The Space CSAC design has been qualified:
Total Ionizing Dose and SEE to simulate Low Earth Orbit ( LEO)
Shock and Vibration
Steady State Life
Thermal Vacuum
Radiation lot acceptance testing for commercial device susceptibility
EAR-99 component ( commercial – no restrictions)
Initial units flying on space missions
First customer contract received for government program
“New Space” type of product that leverage commercial state
of the Art technology for missions

5. Low Noise CSAC New
CSAC has relatively modest Phase Noise and short term stability due to the TCXO used as the Local Oscillator
LNCSAC uses a low power OCXO within the control loop to significantly improve RF output performance
Total Power consumption of less than 300 mW
Footprint is 51 mm x 51 mm
Functionality equivalent to CSAC
CSAC -10 MHz
LNCSAC - 10 MHz
Power
< 120 mW
<295 mW
Temperature Stability
-10 to 70 °C
± 5 x 10-10
Allan Deviation
@ 1 sec.
@ 10 sec.
< 3 x 10-10
< 1 x 10-10
< 2 x 10-11
< 5 x 10-11
Phase Noise
@ 1 Hz
@ 10 Hz
@ 100 Hz
@ 1 kHz
@ 10 kHz
@ 100 kHz
- 50 dBc/Hz
- 70 dBc/Hz
- 113 dBc/Hz
- 128 dBc/Hz
- 135 dBc/Hz
- 140 dBc/Hz
- 85 dBc/Hz
- 120 dBc/Hz
- 145 dBc/Hz
- 150 dBc/Hz
- 155 dBc/Hz

6. CSAC-B release planned mid 2019
Increase of Temperature Range from -40 to 80ºC (from current -10 to +70 deg C)
Storage Temperature of -50 to 105ºC
Prototypes delivered to Test Customers
Engineering Qualification Lot in Process
Further process optimization and higher heater power capacity will extend lifetime above 10 years.
Improvement anticipated for:
Warm-up time
Phase Noise
Allan Deviation
Drift
Temperature Stability
Same form, fit and function as current CSAC

7. The Miniature Atomic Clock (MAC)
The Microsemi SA.3Xm Miniature Atomic Clock (MAC)
Brings Rubidium Atomic Clock performance in an OCXO sized package
Key Specifications:
<1.0E-10 Temperature Stability (Tempco)
<1.0E-10 month aging rate
5 W Power Consumption
47 cc in Volume
Temperature Range: -10 to +75C
Key Applications:
MAC is the Rb of choice for Microsemi FTD Sync products
MAC is deployed as holdover Rb for communications infrastructure

8. MAC Rb Applications Market Precision Frequency Reference Hold-over
Cellular Infrastructure X
Wired Communications
Mission Critical Defense Infrastructure
Aerospace
Test & Measurement
Medical & Scientific

9. MAC Rb versus Traditional Lamp-Rb oscillator
Product 
MICROSEMI
MAC Rb (SA.35m)
Lamp base Rb
Size (mm)
Volume (cc)
51 x 51 x 18
47 cc
77 x 77 x 25.4
151 cc
Monthly Aging
±1E-10
5E-11
TempCo
(Temp Range)
<1E-10
(-10⁰C to 75⁰C)
±3E-10
(-40⁰C to 70⁰C)
Warm-up)
5 W
(14 W)
8.25 W
(18 W)
1PPS disciplining no
yes
Phase Noise @
1Hz
10 Hz
100 Hz
1 kHz
10 kHz
<-70 dBc/Hz
<-87 dBc/Hz
<-114 dBc/Hz
<-130 dBc/Hz
<-140 dBc/Hz
N/S
<-118 dBc/Hz
<-145 dBc/Hz
<-155 dBc/Hz
<-159 dBc/Hz
ADEV
τ = 1s
τ = 10s
τ = 100s
<3E-11
<1.6E-11
<8E-12
N/A
<5E-12
Warm-up Time
15 minutes (Typical)
4 minutes
Operating Range
-10⁰C to 75⁰C
-40⁰C to 74⁰C
Key competitive attributes for MAC:
SWaP compared to traditional Rb
MTBF and reliability
Proven performance and installed base

10. MAC Rb for Holdover (time error)
Tempco and Aging are paramount in achieving the best holdover performance
MAC-SA.35m model Holdover, published in White Paper
<1.5us time error over 1 day,
Temperature varies -10 to +75C.
Three SA35 samples shown.

11. Time error of various oscillators
Long term predicted performance (24 months) is shown below for various oscillators (static temperature environment)
MAC accumulates ~ 0.03s/yr of time error
5071A: Cesium Primary Frquency Standatrd, no frequency ageing (primary), very small time drift (few ns/ day)

12. Next Generation MAC – SA5X release planned mid 2019
The Microsemi SA5X Miniature Atomic Clock (MAC)
brings improved atomic clock performance in the legacy OCXO sized package
Key Projected SA5X Specifications:
<5.0E-11 Tempco (Current MAC SA3X: 1E-10)
<5.0E-11 month aging rate (SA3X: 1E-10)
Better Aging and Tempco improve holdover performance
7 W Power Consumption (SA3X: 5W)
Higher power improves cold temperature operation
47 cc in Volume (No change)
Temperature Range: -40 to +75C (SA3X: -10 to +75C)
1PPS in/out (SA3X: N/A)
1PPS functionality allows easier design options
Drop-In compatibility with current MAC SA3Xm (same pin-out, dimensions)

13. CSAC and Rb products Summary
LN-CSAC
CSAC (SA.45s)
MAC (SA.35m)
XPRO
Size (mm)
Volume (cc)
51 x 51 x 18
47 cc
40.6 x 35.3 x 11.4
17 cc
38 x 127 x 94
455 cc
Monthly Aging
<9E-10
±1E-10
±1E-11
TempCo
(Temp Range)
±5E-10
(-10⁰C to 70⁰C)
<1E-10
(-10⁰C to 75⁰C)
<6E-10
(-25⁰C to 70⁰C)
Warm-up)
295 mW
(775 mW)
120 mW
(140 mW)
5 W
(14 W)
14.4 W
(38 W)
Phase Noise @
1Hz
10 Hz
100 Hz
1 kHz
10 kHz
>100 kHz
<-85 dBc/Hz
<-120 dBc/Hz
<-140 dBc/Hz
<-145 dBc/Hz
<-150 dBc/Hz
<-155 dBc/Hz
<-50 dBc/Hz
<-70 dBc/Hz
<-113 dBc/Hz
<-128 dBc/Hz
<-135 dBc/Hz
N/S
<-87 dBc/Hz
<-114 dBc/Hz
<-130 dBc/Hz
<-80 dBc/Hz
<-90 dBc/Hz
ADEV
τ = 1s
τ = 10s
τ = 100s
<3E-11
<5E-11
<3E-10
<1.6E-11
<8E-12
<1E-11
<3.2E-12
<1E-12
Warm-up Time
4 minutes
180 seconds
15 minutes
6 minutes
Operating Range
-10⁰C to 70⁰C
-10⁰C to 75⁰C
-25⁰C to 70⁰C

14. Thank You! jp.devos@microsemi.com