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About SDA/SCL Pullup resister of TMP102

Satoshi
Guru 19485 points
Other Parts Discussed in Thread: TMP102

If SDA/SCL pullup resister use 2.5kΩ, is it no problem?

・Datasheet rocommended 5kΩ resister.

・Customer using 2.5kΩ pullup. Sometimes, device's ACK isn't return.

⇒I think that pullup is one of the cause. 

 

Best regards,

Satoshi

  • 0
    TI__Genius 15760 points

    Hi Satoshi,

    From Datasheet Design Requirements section:
    "The TMP102 device requires pullup resistors on the SCL, SDA, and ALERT pins. The recommended value for the pullup resistors is 5-kΩ. In some applications the pullup resistor can be lower or higher than 5 kΩ but must not exceed 3 mA of current on any of those pins."

    Can you please verify the current do not exceed 3mA of current on any of those pins?

    Mayrim