For applications requiring atomic clock stability performance that are unable to accommodate the size and power requirements of rack-mount equipment, Microchip’s Miniaturised Rb Atomic Clock (MAC-SA5X) is a low profile, PCB-mountable oscillator.
 
It provides users with a reliable and stable frequency source within minutes of power-on. By leveraging Coherent Population Trapping (CPT) technology used in the Chip Scale Atomic Clock (CSAC) and the previous generation “MAC – SA.3Xm”, the new MAC–SA5X family of clocks is the latest advancement in small atomic oscillators.
 
CPT-based oscillators feature a laser to interrogate the Rb atoms and achieve atomic resonance. This allows a reduction in size and power compared to traditional lamp-based clocks, without compromising the performance one would expect from an atomic clock: fast retrace, resistance to static Gforces, exceptional temperature stability, changes and low frequency drift rates. MAC-SA5X shares the same footprint with the legacy SA.3Xm and many traditional OCXOs, but its performance versus size is unparalleled. Its hardware and software have been completely redesigned to add new features such as 1PPS synchronisation, improve stability, and operate over a wide temperature range of thermal environments. This combination of features, along with the ability to quickly provide an atomic frequency reference, is particularly powerful for mobile applications where every minute and every Watt counts.

• < 5E–11 monthly aging (frequency drift per month)
• < 5E–11 frequency change vs. temperature change (−10°C to +75°C)
• < 200 ns holdover ability over 24 hours (typical, static temperature)
• Remote monitoring and control (RS232 and USB)
• 1 PPS disciplining from externally supplied signal (phase and frequency calibration)
• Dimensions: 2 x 2 x 0.7 inches

Datasheets

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