I'm sure alot of us have been waiting with anticipation for this one.Let's get some samples and/or eval board and test its performance to determine applications that it may be suitable for.

Digital-output X-, Y-, and Z-Axis angular rate sensors (gyros) on one integrated circuit with a sensitivity of 14.375 LSBs per °/sec and a full-scale range of ±2000°/sec

Three integrated 16-bit ADCs provide simultaneous sampling of gyros while requiring no external multiplexer

Enhanced bias and sensitivity temperature stability reduces the need for user calibration

Low frequency noise lower than previous generation devices, simplifying application development and making for more-responsive motion processing

Digitally-programmable low-pass filter .. and more....


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  • Surprised they're not standard peripherals in microcontrollers yet, along with 900Mhz radios & cappuchino machines.
  • Would be perfect I would guess Brian. The key issues for us on quads are just vibration that's all but it is a big show stopper. If your application is on a platform that doesn't have much vibration such as a head tracker for FPV (worn on the head of the operator not on the vehicle) or a swimmer you are spoilt for choice for cheap gyros but a 3 axis IC is a really tidy package.

    The issue for us is the MEMS frequency on some gyros tends to be right in the middle of the frequency produced by multi-rotor helis, the noise from the gyro is just a mess and makes it unusable. There are ways to suppress this noise a bit with hot glue and other tricks such as embedding the AHRS in gel but we did not want to go that route.

    As I pay for all the development out of my own pocket, I personally dislike how expensive our AHRS is to make, one failed unit is really a big issue but so far we have no other choice but the adxrs610, it means our AHRS is 3 boards and not one, is not flat and has BGA parts. Using this gyro would easily knock $80 off the price of our AHRS in parts alone, the PCB costs would be less and so would the PCB assembly costs as well.

    The post I originally replied to has gone, it was a snarky dig that we always are sceptical of these new parts (I don't really recall being like this actually) but if so, it is for good reason. I would absolutely love this part to be awesome, likely more than anyone else, so far all the testing on other gyros has proved fruitless for us because of the MEMS issue and Quads, but, for other applications and even fixed wing this could be fantastic. Testing would be the way to go as with everything.

    Our AHRS will be the last part we make and we are hanging back as there is a chance of some game changer like this coming along that is great for us, in fact it is a certainty something will replace the adxrs610 at some point. If the ITG-3200 is it, the timing is perfect as we have not committed to anything yet.
  • @Dave, please accept my humblest apologies as my comment was not in good taste nor called for and has been removed.
  • Moderator
    If it works well for fpv, then I'll bet these would work well for stabalizing the camera on a slow moving underwater vessel (or surface vehicle for that matter). Think I'll get one for my swimmer!
  • There are several gyros we tested that should be near perfect according to the data sheet alas in real world testing it does not always work out that way. Lets hope it does, good news is that one member of OpenPilot team has already got an eval unit on the way and is waiting on the 3 axis accel and mag from ST for a new AHRS,

    However this is planned to be an FPV head tracker and I'll quote him "For headtracker this will work quite fine and is perfect solution I would hope but for aircraft I am not so sure.". Seems to back up Melih's thoughts and actual but testing will tell.

    Because Open Pilot is sold as close to cost as we can get it, we have room to use high-end parts and have always wanted a high end autopilot and AHRS, we also really wanted a flat AHRS and worked really hard to try and achieve this: http://www.openpilot.org/OpenPilot_FAQ#Why_not_a_flat_AHRS.3F

    All this OMG and ten thousand exclamation points everywhere doesn't add much credibility to this thread.
  • T3
    Melih is theoretically on track.
    Analog filtering for IMUs is a delicate thing and I believe should be done tailored to our environment, which is full of vibration and oscillations that we cannot control, so we shouldn't try to track them.
    The key value is the amount of temperature drift.
    Everything else is nearly perfect.
  • Another "game controller" type mems device. I'm not thinking it is usefull for IMU. You dont have any control on sampling rates and output values. You can read the values in 100.000hz with any PIC or Atmel controller's ADC with 10 bit resolution. But this device giving 14.000 output only in 8 bit mode. And digital filtering is another problem. You can make perfect filter with a resistor and a capacitor for analog aoutputted sensor. But when using digital sensors, you need calculations + extra ram + extra cpu usage for making a filter and results will already noisy.
  • Excellent! Now they've just got to combine this with the 3 axis accel into a single chip and we might finally have an ideal, low cost IMU.
  • Jordi: Strap it onto a plank of wood with a motor and dump the data here please :)
  • Developer
    I just got an eval board.
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