{"product_id":"sparkfun-atomic-clock","title":"SparkFun Atomic Clock","description":"\u003cp\u003eThe Miniature Atomic Clock (MAC) from Microsemi uses a rubidium laser to output an extremely accurate clock. We're speaking at the edge of our knowledge so please bear with us but the short-term stability (Allan Deviation) is �8*10\u003csup\u003e-12\u003c\/sup\u003e. From Wikipedia on \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Atomic_clock\"\u003eAtomic Clocks\u003c\/a\u003e:\u003c\/p\u003e \u003cblockquote\u003e \u003cp\u003eFor context, a femtosecond (1�10\u003csup\u003e�15\u003c\/sup\u003e s) is to a second what a second is to about 31.71 million (31.71�106) years and an attosecond (1�10\u003csup\u003e�18\u003c\/sup\u003e s) is to a second what a second is to about 31.71 billion (31.71�109) years.\u003c\/p\u003e \u003c\/blockquote\u003e \u003cp\u003eThat puts the SA.35m Miniature Atomic Clock in the picosecond category of eight seconds per 31,689 years. Said differently, the MAC loses a second every 4,000 years or so.\u003c\/p\u003e \u003cp\u003eHow does it work? From Microsemi:\u003c\/p\u003e \u003cblockquote\u003e \u003cp\u003eThe MAC is a passive atomic clock, incorporating the interrogation technique of Coherent Population Trapping (CPT) and operating upon the D1 optical resonance of atomic Rubidium Isotope 87.\u003c\/p\u003e \u003cp\u003eA rubidium clock is basically a crystal oscillator locked to an atomic reference. The rubidium physics package serves as a passive discriminator, producing an error signal that varies in magnitude and sense as a function of the difference in frequency between the applied RF excitation and the atomic resonance. Rubidium is a small, low weight and low cost atomic standard that is quickly activated. It delivers good phase noise performance, exhibits low G force sensitivity, and operates in a wide temperature range. These advantages make it an ideal alternative to quartz technology. Rubidium clocks provide rapid operational stability after turn on, exhibit better long term aging characteristics, and are less susceptible to physical effects.\u003c\/p\u003e \u003c\/blockquote\u003e \u003cp\u003eA low-cost \u003ca href=\"https:\/\/www.sparkfun.com\/products\/14414\"\u003eGPS receiver\u003c\/a\u003e can get you accurate timing at ±10,000ps. The Miniature Atomic Clock SA.35m is four orders of magnitude more accurate at ±8ps. And considering atomic clocks used to be the size of a small car, the MAC is incredibly small at 51x51mm (2\" square).\u003c\/p\u003e \u003cp\u003eApplications:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eGPS Anti-Jamming and Jamming detection\u003c\/li\u003e \u003cli\u003eCellular Base Station\u003c\/li\u003e \u003cli\u003ePrecision frequency reference\u003c\/li\u003e \u003cli\u003eAquatic mapping\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eWe do not plan to regularly produce SparkX products so get them while they�re hot!\u003c\/p\u003e \u003cdiv class=\"alert alert-warning\"\u003e\n\u003cb\u003eExperimental Product:\u003c\/b\u003e \u003ca href=\"https:\/\/www.sparkfun.com\/sparkx\"\u003eSparkX\u003c\/a\u003e products are rapidly produced to bring you the most cutting edge technology as it becomes available. These products are tested but come with no guarantees. Live technical support is not available for SparkX products. Head on over to our \u003ca href=\"https:\/\/forum.sparkfun.com\/\"\u003eforum\u003c\/a\u003e for support or to ask a question.\u003c\/div\u003e \u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003ePerformance Parameters:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eWarm-up time: (time to \u0026lt;1�10\u003csup\u003e�9\u003c\/sup\u003e) \u0026lt;15 min (typical at 25°C)\u003c\/li\u003e \u003cli\u003eRetrace \u0026lt;±5�10\u003csup\u003e�11\u003c\/sup\u003e (on-off-on: 24 hours, 48 hours, 12 hours at 25°C)\u003c\/li\u003e \u003cli\u003eAnalog tuning Range: ±1�10\u003csup\u003e�8\u003c\/sup\u003e \u003cul\u003e \u003cli\u003eInput: 0V�5V into 5kΩ\u003c\/li\u003e \u003c\/ul\u003e\n\u003c\/li\u003e \u003cli\u003eDigital tuning Range: ±2�10\u003csup\u003e�8\u003c\/sup\u003e (resolution ±1�10\u003csup\u003e�12\u003c\/sup\u003e)\u003c\/li\u003e \u003cli\u003eTime drift in a 24hr period (SA.35m): 1.5μs, typical (�10°C to 70°C, 16°C\/hr)\u003c\/li\u003e \u003cli\u003eMTBF Per MIL-HDBK-217F: \u003cul\u003e \u003cli\u003e�20 years at 40 °C (ground, benign, GB)\u003c\/li\u003e \u003cli\u003e�17 years at 40 °C (ground, fixed, GF)\u003c\/li\u003e \u003c\/ul\u003e\n\u003c\/li\u003e \u003cli\u003eAccuracy at shipment \u0026lt;±5�10\u003csup\u003e�11\u003c\/sup\u003e (25 °C)\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eRF Output:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eFrequency: 10 MHz\u003c\/li\u003e \u003cli\u003eWaveform CMOS square wave: 0VDC�5VDC(max)\u003c\/li\u003e \u003cli\u003eLogic level: VOL(max) 0.55V, VOH(min) 2.3V\u003c\/li\u003e \u003cli\u003eRise\/fail time: \u0026lt;10ns (15pf, 1MΩ load)\u003c\/li\u003e \u003cli\u003eDuty cycle: 50% ±10%\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eSerial communication (for configuration and monitoring):\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eFormat: CMOS 0V to 5VDC\u003c\/li\u003e \u003cli\u003eBaud rate: 57600bps (8, N, 1)\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePower Input:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eSupply voltage\/current: 5VDC ± 0.1VDC, max current \u0026lt;2.8A\u003c\/li\u003e \u003cli\u003ePower consumption Warm-up: 14W max (�10°C to 75°C)\u003c\/li\u003e \u003cli\u003eOperating: 8W at 10°C, 5W at 25°C, 5W at 75°C baseplate\u003c\/li\u003e \u003cli\u003eVoltage coefficient: \u0026lt;2�10\u003csup\u003e�11\u003c\/sup\u003e peak-to-peak (+5VDC ± 0.1VDC)\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e18.3 x 50.8 x 50.8mm\u003c\/li\u003e \u003cli\u003e55g\u003c\/li\u003e \u003cli\u003eRecommended socket for PCB attachment: Mill-Max 0332-0-43-80-18-27-10-0\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eDocuments:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePart Number: 090-44350-32\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/cdn.sparkfun.com\/assets\/7\/3\/c\/6\/b\/Microsemi_Miniature_Atomic_Clock_Datasheet.pdf\"\u003eMiniature Atomic Clock Datasheet\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/cdn.sparkfun.com\/assets\/4\/2\/0\/7\/3\/Miniature_Atomic_Clock_User_Guide.pdf\"\u003eSA.35m MAC User Guide\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/cdn.sparkfun.com\/assets\/6\/f\/8\/c\/4\/macdemo_0p10.zip\"\u003eMAC Demo Software\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eThere are a variety of good articles out there about the advancements of atomic clocks. Here are a few we enjoyed:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\u003ca href=\"https:\/\/spectrum.ieee.org\/semiconductors\/devices\/chipscale-atomic-clock\"\u003eThe Birth of the Chip-Scale atomic Clock\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/www.wired.com\/2014\/04\/nist-atomic-clock\/\"\u003eNIST deploys F2\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e","brand":"sparkfun-10","offers":[{"title":"Default Title","offer_id":40683078746197,"sku":"14830:SPX-14830:spark","price":343140.0,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1034\/1611\/files\/14830-Atomic_Clock-01.jpg?v=1694102733","url":"https:\/\/www.tanotis.com\/products\/sparkfun-atomic-clock","provider":"Tanotis","version":"1.0","type":"link"}