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Description: Breakout board for the low power, single axis ADXL193 MEMS accelerometer. The ADXL193 is a high-g sensor with a full scale range of ±250g! The ADXL193 can be powered from 3.5-6V. Access to the self-test pin is also provided.

Note: The ADXL193 outputs an analog voltage. This voltage is in ratio to the measured acceleration and to the supply voltage. You will need some extra hardware to convert this analog signal to a usable digital one. Luckily, many uCs have a built in Analog to Digital converter.

Dimensions: 0.4x0.55"

Features:

  • Sensing Range: ± 250g
  • Output Signal: Analog (ratiometric)

Documents:

Comments 19 comments

  • The datasheet says: “This product measures acceleration with a full-scale range of 120 g or 250 g”

    Do you also provide the 120 g version? (aka. “Model No. AD22282”)

  • Im confused, which is more sensitive 250g or 2g? Sorry if the question sounds dumb!

    • Sensitivity is usually a function of range / resolution (plus all sorts of data on error, etc.). I’m not sure which 2g device you’re asking about, but since you also posted in Triple Axis Accelerometer Breakout - ADXL345, just as a very basic comparison between the two:

      The ADXL193 single axis accelerometer has a range of +-250g. Wikipedia on g-force suggests that this means you could measure ‘Brief human exposure survived in crash’. It is an analog output device, so it doesn’t necessarily have an inherent ‘resolution’. However, for most purposes you’ll have to convert this to a digital value through an ADC somehow. If you’re using an Arduino, then the ADC is 10 bits, meaning you get about 1024 levels over this range. Unless you do some analog tricks to modify the linear relationship between g force and output voltage, this means you get a resolution of roughly 0.5g/level.

      The ADXL345 triple axis accelerometer has a range of +-16g. Wikipiedia on g-force suggest that this means you could measure ‘Typical max. turn in an aerobatic plane or fighter jet’. It has a digital output with a 13bit resolution. Here you don’t have to use an ADC, but will of course have to read the data correctly. The resolution here would be roughly 0.004g/level.

      So if you’re asking which one is more sensitive, the ADXL345 clearly wins. It’s also triple axis, and a few bucks cheaper. The ADXL345 is an option if you need to measure accelerations outside of the ADXL345’s range (such as its use suggested in the datasheet: for car impact airbag purposes).

      For some further light reading, see also:
      How to Select an Accelerometer
      Accelerometer, Gyro and IMU Buying Guide

  • Wondering if someone could tell me should the force be applied towards the arrow on the silkscreen or with the arrow?

    • Either, really. The arrow is defining the axis. As long as the force is occurring in parallel with the arrow, you’re going to get a reading. Make sense?

  • I am building a Gravity Force Accelerator which requires accurate G-Force readings. This board with the Arduino is perfect for my application. Results will be shared with others when available sometime in 2013.

  • I may be missing something, but where does it mention the resolution (sensitivity) of the accelerometer in Gs.

    It says 8mV/g and range from -250 to 250g.
    .008*500=4V

    But it goes to 5V… 5/.008=625g or -312.5 to 312.5g

    regardless it seems like the sensitivity is about 1g. That seems very low. Is this right?

  • I’m a bit concerned about the Bessel filter on this for my application; am I reading the data sheet correctly to assume that I can only read expect readings to change at 400Hz or less? Or am I misreading that entirely?

    I’m trying to use it to measure rotational velocity on a yoyo – but I’m also hoping to be able to detect “down” (well, direction of maximum acceleration; that won’t really be down in many cases). Since the yoyo’ll be spinning @ roughly 60Hz; I’m concerned that I’d only see (effectively) ~6 samples / rotation.

  • According to the datasheet, the positive acceleration-measurement is in the direction from the side of the chip with the notch on it, but on your board the silkscreen arrow appears to point the wrong way? Is that right?

  • reading the datasheet I still don’t know the exact voltage reading for certain acceleration values. Pleaes help!!

    • According to the datasheet, when the supply voltage is 5V, the part will output about 8mV (0.008 V) per g. Zero g will be approximately ½ of the supply voltage, but could vary so you should test the individual part at rest and use that voltage as zero g. So if the supply is 5V, zero g will be around 2.5V, and 100 g will be around 3.3V (2.5V + (0.008V * 100g)). The output is relative to the supply voltage, so if you’re running it at a different voltage you’ll get different results.

  • Hi, Can it be used to detect linear distance from point A to point B that are on one axis (x-axis)?
    I’m trying to detect 0-16 inch linear distance change of an object, and was wondering if I can embed this sensor inside the object, so I can tell where the object is on a fixed track.

    • You’d need an accelerometer with astronomical precision to accomplish that. It is technically possible, but there would be a ton of error.

  • Could this in theory be used as a “wake up” sensor? I’m working on something for a vehicle that would always be on, but in a low power state. When the vehicle moves, this would be used to “wake up” the micro controller it’s attached to?

    • Not really, since you’d have to have your uC constantly checking it for data. You could have it wake up every second or so and check, then go back to sleep, but then you’d have to make sure your large acceleration happens for more than 1 second.

  • Hey, does anybody know of any way that one of these could be wired up to a basic stamp?

  • I used this to measure the acceleration of a projectile in my air cannon for my senior project in college. 20 PSI shots recorded around 100g and 30 PSI was ripping the solder connections out of the board.

  • I’d like to know how suitable this sensor would be to capture a range of vibrations from 0-~15kHz. The acceleration of my assembly should not exceed 150g but I’d like to make sure this will suit my needs as many people in my department are nay-saying any sensor that costs less than several thousand dollars. From what I’ve gained from the data sheet this seems ideal. Now to find a suitable ADC…
    Please see my forum post for a discussion on this topic:
    http://forum.sparkfun.com/viewtopic.php?p=83638#83638

  • Hooray! I’ve been waiting for you guys to churn out a 200+G accelerometer breakout bot for ages. Will be ordering a few of these soon :)


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