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Problems with ADIS16265 EVAL Board ...

Thread Summary

The user experienced inconsistent voltage readings and low power diagnosis from an ADIS16265 Gyro evaluation board, with values fluctuating between 1.9V and 4.9V. The issue was resolved by replacing the evaluation board, suggesting a potential cold soldering problem. The new board provided stable readings and correct voltage values immediately upon connection.
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Hi everybody,

I am just working on the implementation of a ADIS16265 Gyro into my roboter application and a have problems

with the readings of the Evaluation board.

The Board is sending sometimes stupid values.

i.e: I am asking for the voltage of the board and get  values between 1.9 ... 4.9 Voltage back.

Sometime, the board is sending for a long time the correct value, which is around 4.95 Voltage,

Which I check with a oscilloscope. The ripple is around 5mV, which should be o.k. as well.

The diagnosis status is saying as well, that it is low power on the chip (sometimes).

It is a LGA mounted chip and I can only check the voltage up the connector of the board, which is fine.

Not on the controller directly.

Does somebody has bad experience with this chip as well ?

Or can this behaviour happen by a software failure. Communication to a other SPI Client is running well.

Is the a test program existing for a atmega - controller, where I can check, if it is a software or Hardware failure.

Best regards

R.

Parents
  • Hi,

    I have check the signal state. All signals are fine (rise and fall of voltage is o.k.).

    Only on Pin 4of the Board (DOUT), the signal stage is not correct.

    I has steps in between 3.3V and 5.0 Volt. See attached picture. I also tried this with the internal pull up's of the controller and a external pull up (6.8k). Always the same. If no pullup is configured, the signal is only going up to 3.3V as high level).

    Edit2:

    I read in the documentation, that the signals are 5V compatible, but I will add a level converter (74HCT125) for this pin to get the full 5V. A normal Pull up will not help in my configuration so far.

    Edit1:

    Just in addition, do I have to mount a condenser for C1 / C2 on the board, or is this a option ?

    Best regards

    Ritchie

Reply
  • Hi,

    I have check the signal state. All signals are fine (rise and fall of voltage is o.k.).

    Only on Pin 4of the Board (DOUT), the signal stage is not correct.

    I has steps in between 3.3V and 5.0 Volt. See attached picture. I also tried this with the internal pull up's of the controller and a external pull up (6.8k). Always the same. If no pullup is configured, the signal is only going up to 3.3V as high level).

    Edit2:

    I read in the documentation, that the signals are 5V compatible, but I will add a level converter (74HCT125) for this pin to get the full 5V. A normal Pull up will not help in my configuration so far.

    Edit1:

    Just in addition, do I have to mount a condenser for C1 / C2 on the board, or is this a option ?

    Best regards

    Ritchie

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