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Temperature logger

MD NAHIDUR RAHAMAN
Intellectual 275 points
Other Parts Discussed in Thread: RF430FRL152H, TMP006, PCA9306, RF430FRL152HEVM, RF430CL330H, TMP112, OPT3001, HDC1000

Hi i am starting a project called Temperature logger. For my project I selected a IC which part Number is RF430FRL152H. I wanna use TMP006/B infrared Thermopile sensor for my project. My question is can i use TMP006/B IC with RF430FRL152H IC? If i can then how can i connect TMP006/B with RF430FRL152H?  Thank you for help.

  • 0
    TI__Mastermind 27380 points

    Hi,

    TMP006 communicates through I2C bus, which RF430FRL can be configured for. However you’ll need to pay attention to supply and logic levels. The supply ranges and logic levels for these devices are not overlapping. If you must use these two devices in the same system, you may need seperate supplies and level translators. Please let us know if you have other specific questions regarding TMP006/B; if you have specific questions regarding RF430FRL, we can help direct you to the experts in this area.

    Guang

    Apps-Sensing Products

  • 0 in reply to Guang Zhou
    Intellectual 275 points

    Hi Guang,

    Thank you for reply. In your answer you mentioned separate supplies for ICs. What you mean by overlapping?  Is it meaning I need to supplies separate power for ICs? When i read RF430FRL data sheet I saw this ic can take power from antenna. Actually I want to use RF430FRL and IR temperature sensor for my project. Actually I want to make a device and that device will measure the temperature to a liquid medicine like picture and finally device will send the data in to the mobile through NFC. Can you suggest me some appropriate ICs for my project?

    Thank you

     

  • 0 in reply to MD NAHIDUR RAHAMAN
    TI__Mastermind 27380 points

    Hi,

    Thanks for the detailed information, it is great that you can spare one supply rail.

    One other option is to choose a higher supply, 5V for example, and use power management chips to step it down to 3.3V and 1.5V therefore create the supply rails.

    To connect the I2C bus between the two devices, you’ll have to design a level shifter so that on the RF430FRL side the bus is pull up to 1.5V; on the TMP006 side, the bus is pulled up to 3.3V.

    Guang

    Apps-Sensing Products

  • 0 in reply to Guang Zhou
    TI__Mastermind 38590 points

    Correct, you will need to use a level translator since the RF430FRL152H operates on 1.5V level.  You can see an example of this in the RF430FRL152HEVM.  The PCA9306 is used to translate between 1.5V and 3.3V. 

    If you will be operating completely from field power(no battery supply), you can use the VDD2X pin to provide the 3V required for power to the TMP006 and PCA9306. 

    Another option is to use the RF430CL330H + MSP430.  This would allow for 3V interfacing without level translators.  See the TI Design below. 

    http://www.ti.com/tool/TIDA-00217

    We are also working on a new design that is similar, but will integrate more sensors including TMP112(0.5C accurate temperature), HDC1000(humidity), and OPT3001(light).  This design will be more focused on battery(coin cell) operated designs where the data must be logged when an RF field is not available.  This is expected to release in the next couple months.

  • 0 in reply to Eddie LaCost
    Intellectual 275 points

    Hi Eddie LaCost,

    Thank you for useful comments. In my project I dont wanna use external power,I wanna operating completely from field power because i dont wanna store data. Can I make my project using  RF430FRL152H,  PCA9306 and TMP006 Ics from field power? Before I am starting PCB i wanna simulation by CAD software and wanna see the result. Which software I use for simulation and result check?

    I already bought TP006 ic and EVM.

    Thank you....