TMP421: Replacement of TMP441

Shinichi Yokota

Part Number: TMP421
Other Parts Discussed in Thread: TMP441,

Hello,

If TMP441's beta compensation function is NOT used, can the TMP441 be replaced with TMP421 without changing software to control registers?

Best regards,
Shinichi Yokota

over 2 years ago

+1 Ren Schackmann over 2 years ago

TI__Mastermind 41365 points

Hi Shinichi-san,

The TMP441's registers relating to beta compensation do not exist in TMP421. The TMP421 should NACK attempts to write to these registers, even if they are writes that would otherwise disable beta compensation on TMP441. Additionally, the Device ID registers will report different values. If your software is not bothered by this, yes, these devices are compatible.

thanks,

ren

0 Shinichi Yokota over 2 years ago in reply to Ren Schackmann

TI__Genius 9715 points

Ren,

Ren Schackmann said:
The TMP421 should NACK attempts to write to these registers, even if they are writes that would otherwise disable beta compensation on TMP441.

Will the TMP421 return NACK for read attempts to those registers, too?

Best regards,
Shinichi Yokota

0 Ren Schackmann over 2 years ago in reply to Shinichi Yokota

TI__Mastermind 41365 points

No, it will respond normally with erroneous data.

thanks,

ren

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TMP421: Replacement of TMP441