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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
  • When you refer to the evaluation board, which part number are you referring to?  I suspect you are referring to the ADIS16265/PCBZ, but it would be nice to know for sure.  How are you connecting this board to your processor?  While we are glad that the other SPI device is communicating will in your system but, by itself, that does not assure successful communication with other devices.  Have you tried reading the PROD_ID register, while proving all of the SPI signals with a scope?  This allows you to check for the proper bit coding, clock polarity, clock phase, timing and signal integrity.  There are more details on this, for another production that has a similar interface protocol, in the following discussion.

    https://ez.analog.com/message/44238#44238

    I hope that helps and look forward to helping with any follow-up questions.

    Best,

    NevadaMark

Reply
  • When you refer to the evaluation board, which part number are you referring to?  I suspect you are referring to the ADIS16265/PCBZ, but it would be nice to know for sure.  How are you connecting this board to your processor?  While we are glad that the other SPI device is communicating will in your system but, by itself, that does not assure successful communication with other devices.  Have you tried reading the PROD_ID register, while proving all of the SPI signals with a scope?  This allows you to check for the proper bit coding, clock polarity, clock phase, timing and signal integrity.  There are more details on this, for another production that has a similar interface protocol, in the following discussion.

    https://ez.analog.com/message/44238#44238

    I hope that helps and look forward to helping with any follow-up questions.

    Best,

    NevadaMark

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