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Adafruit DS3231 Precision RTC Breakout [ADA3013]

4.6 out of 5 stars 40 ratings

Price: $38.00
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  • Adafruit Part Number: 3013
  • Stock Type: Breakout Boards >> Clocks
  • In Stock & Ready to Ship

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Package Dimensions ‏ : ‎ 10 x 8 x 1 cm; 2.1 Grams
  • Date First Available ‏ : ‎ 3 May 2017
  • Manufacturer ‏ : ‎ Adafruit
  • ASIN ‏ : ‎ B0718XYYTB
  • Item Model Number ‏ : ‎ 8541582433
  • Customer Reviews:
    4.6 out of 5 stars 40 ratings

Frequently bought together

  • Adafruit DS3231 Precision RTC Breakout [ADA3013]
  • +
  • Energizer ECR1220BP Electronic Lithium 3V Batteries, Black/Red
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Product description

The datasheet for the DS3231 explains that this part is an "Extremely Accurate I²C-Integrated RTC/TCXO/Crystal". And, hey, it does exactly what it says on the tin! This Real Time Clock (RTC) is the most precise you can get in a small, low power package.

Most RTCs use an external 32kHz timing crystal that is used to keep time with low current draw. And that's all well and good, but those crystals have slight drift, particularly when the temperature changes (the temperature changes the oscillation frequency very very very slightly but it does add up!) This RTC is in a beefy package because the crystal is inside the chip! And right next to the integrated crystal is a temperature sensor. That sensor compensates for the frequency changes by adding or removing clock ticks so that the timekeeping stays on schedule.

This is the finest RTC you can get, and now we have it in a compact, breadboard-friendly breakout. With a coin cell plugged into the back, you can get years of precision timekeeping, even when main power is lost. Great for datalogging and clocks, or anything where you need to really know the time.

Comes as a fully assembled and tested breakout plus a small piece of header. You can solder header in to plug it into a breadboard, or solder wires directly.

A coin cell is required to use the battery-backup capabilities! We don't include one by default, to make shipping easier for those abroad,  but we do stock them so pick one up or use any CR1220 you have handy.

Check out our detailed tutorial for pinouts, assembly, wiring & testing, and more!


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4.6 out of 5 stars
4.6 out of 5
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Top reviews from other countries

frederic
5.0 out of 5 stars Good
Reviewed in France on 4 April 2019
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John Antonio Collins
5.0 out of 5 stars Also accepts a 1216 battery.
Reviewed in the United States on 30 April 2019
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2 people found this helpful
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govy1
5.0 out of 5 stars Extremely accurate and easy to use
Reviewed in the United States on 16 March 2020
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Larry
5.0 out of 5 stars Very accurate
Reviewed in the United States on 28 May 2019
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3 people found this helpful
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Mike
5.0 out of 5 stars Very accurate time keeping. Uncommon battery size.
Reviewed in the United States on 24 October 2020
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