STM3210B-EVAL shipping with Philips LM75A instead of STLM75 I2C temperature

dale2 · ‎2008-01-16

Posted on January 17, 2008 at 08:53

dale2 · ‎2011-05-17

Posted on May 17, 2011 at 12:21

My STM3210B-EVAL has a Philips (now NXP) LM75A I2C temperature sensor installed instead of the STLM75, which explains why I was getting 2 bonus bits of precision (11 bit instead of 9 bit) in the temperature readings. This gives me 0.125 degree C resoultion instead of 0.5 degree C resolution, which sounds good except that both parts only guarantee +/-2.0 degrees accuracy in the -25C to +100C temperature range.

The board is marked ''STM3210X-128K-EVAL''. Perhaps it's an earlier revision.

Thanks,

Dale Wheat

16-32micros · ‎2011-05-17

Posted on May 17, 2011 at 12:21

Hi Dale,

You are right, I have also the same on my board. It seems that The evaluation board manual contains an early revA PCB board.

STOne-32