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TMP117: TMP117 vs ADT7320

ttd
Mastermind 8590 points
Part Number: TMP117

Dear Technical Support Team

Do you have a comparison document between TMP117 and ADT7320?

Best Regards,

ttd

  • 0
    TI__Mastermind 28070 points

    Hello ttd,

    We do not have a document that compares the TMP117 and ADT7320, but here's a quick comparison on some of the specs between the two devices. 

    Property TMP117  ADT7320 
    Comm. Protocol I2C SPI
    Supply Range 1.8V to 5.5V 2.7V to 5.5V
    Operating Temperature TA -55°C to 150°C -40°C to 150°C
    Short range Accuracy (MAX) ±0.1°C from -20°C to 50°C ±0.2°C from -10°C to 85°C at 3.0V
    Whole Range Accuracy (MAX) ±0.3°C from -55°C to 150°C Unspecified, (TYP) is -0.85°C Typ at 150°C
    Resolution 0.0078°C (16-bit) 0.0078°C (16-bit)
    Programmable Interrupt Yes Yes
    Shutdown Current (MAX) 500nA at 25°C 15µA at 3.3V
    Curent - 1 Hz Sampling (TYP) 15µA 150µW at 3.3V
    Drift (TYP)  ±0.03°C ±0.0073°C

    Both devices have: Programmable Interrupts, No calibration required, Shutdown Mode, and One-shot Conversions.

    The TMP117 also has: Configurable averaging, Integrated EEPROM, and a Temperature Offset Register.

    There are a lot of different conditions and requirements for these specifications, so the two devices do not compare easily. This information is just what I could pull quickly from the datasheet for the two parts. For a real comparison you will have to consult the datasheet of both devices, or if you have a specific spec you would like more information on I may be able to help with that. 

    Please let me know if you have any more questions.

    Best Regards,
    Brandon Fisher

  • 0
    TI__Prodigy 355 points

    just mention additionally

    TMP117 is 6 pin 2x2mm package. ADT7320 is 16 pins 4x4mm package with the same thickness 0.8mm. It means the thermal mass is at least 4 times bigger.

    PSRR is 0.006mC/V against 0.1C/V in ADT7320

    There is no data what will be in ADT7320 a supply current (self-heating) when there will be 5MHz bypassing communication on SPI bus

  • 0 in reply to Brandon Fisher94
    Mastermind 8590 points
    Hi Brandon Fisher,

    Thank you for your reply.
    It i very useful for me to compare both specifications.

    By the way , generally the current consumption of I2C is larger than SPI because of pullup register.
    I think that I2C cycle is just 27 read cycle(add + byte1 +byte2) per 1SPS and current consumption during just Low output .
    It is not continuous and short time access and low current consumption , right?

    Best Regards,
    ttd
  • 0 in reply to ttd
    TI__Mastermind 28070 points
    Hi ttd,

    I think you are correct. I would expect SPI to consume less current than I2C in most cases. This is because of the pullups and the longer transmission time of I2C. For minimum power consumption on the bus you will want to use the highest frequency available.

    Best Regards,
    Brandon Fisher