ADS8028: TM_BUSY won't wiggle

Matt Mishrikey

Part Number: ADS8028

With ADS8028 temp conversion, I seem to be issuing the correct SPI command, and can even read out temp data. However the TM_BUSY won't go high when conversion starts. Not sure if I have a bad device, or if there is something else to check.

Datasheet seems to indicate this signal is logic high/low, and no mention of any pull-up or pull-down needed.

over 1 year ago

0 Alexander Smith over 1 year ago

TI__Guru 54562 points

Hi,

Please allow us some time to respond as many of our engineers are out for the holidays. Thank you.

0 Samiha Sharif over 1 year ago

TI__Expert 7905 points

Hi Matt,

Thanks for your question! You're right, it doesn't seem like the TM_BUSY pin needs a pull-up/down. Have you set the T_sense bit in the control register to "1" ? If possible, I recommend trying to swap the device to isolate if it is a device issue or a setup issue.

Best,

Samiha

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ADS8028: TM_BUSY won't wiggle