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Miniature Atomic Clock (MAC-SA5X)

Miniaturized Rubidium Atomic Clock With Superb Holdover Capability

The MAC-SA5X is designed for applications that require rubidium atomic clock holdover performance but are constrained by size and low power requirements. Its superb short-term stability (Allan Deviation), resistance to temperature changes (tempco) and long-term drift performance allow tight synchronization to GNSS timing or another primary reference clock. This enables nanosecond holdover performance for days at a time.

Key Features

  • The MAC-SA55 offers excellent stability for its size:
    • < 1.5E-11 ADEV @ 1s        
    • < 5E–11 monthly aging (frequency drift per month)
    • < 5E–11 frequency change vs. −40°C to +75°C temperature change
    • < 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: 51 × 51 × 18 mm
  • Clockstudio™ software tool supports MAC products

Available Models

Model Part Number Description Aging (Frequency Drift) Temperature Stability 72-Hour Holdover Capability
(10°C Temperature Change)
090-44530-01* MAC-SA53 (Base) < 10E−11/mo < 10E-11 4 uS
090-44550-01* MAC-SA55 (High Performance) < 5E−11/mo < 5E−11 2 uS
090-44570-01* MAC-SA57 (Ultra High Performance) < 2E-11 /mo < 2E-11 1 uS
090-44500-000 Evaluation Kit (MAC-SA5X not included)      

*Add "-EU" to these part numbers to order from our German factory (e.g., 090-44530-01-EU)

Video

The Miniature Atomic Clock (MAC-SA5X)

The Miniature Atomic Clock (MAC) was launched in 2020, setting the standard as the top-performing rubidium oscillator in terms of size and power efficiency. Since then, thousands of MAC units have been deployed across the communications, test and measurement and aerospace and defense sectors. Watch this video to learn about the performance enhancements that the MAC offers.

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Documentation

Brochures

MAC-SA57 Extended Sell Sheet
PDF
MAC-SA5X Extended Sell Sheet
PDF

User Guides

Miniature Atomic Clock (MAC) SA5X User's Guide
PDF

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