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Temperature Sensors

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  • Forum Post: Re: Introductions

    Matt Hann
    Hi Noam, Welcome to our Temperature Sensor Community. To answer your question--no, the TMP102 is not 100% I2C compliant as it has a "timeout" function that will cause the TMP102 to release the bus if SDA or SCL is held low for ~30mS between a START and STOP condition. Essentially what this...
    on Jan 13, 2009

  • Forum Post: Implement 120 Temperature sensors on a single I2C Bus.

    Aseem Gupta
    Hi! I need to implement 120 Temperature sensors on a single I2C Bus. Using MSP430F5438 Microcontroler. How would I do the addressing and if TMP102 ok on such an Implementation. Thanks Aseem K Gupta
    on Oct 19, 2009

  • Forum Post: Re: Introductions

    RudyeM
    Hi Aseem, The TMP102 will only support 4 unique addresses on a single I2C bus. The MSP430F5438 has 4 USCI's. So those will cover 16 temperature sensors. For the remainder, you would have to setup digital pins and write your own I2C protocal to communicate with the TMP102's. You might want...
    on Oct 19, 2009

  • Forum Post: TMP102, ALERT pin pullup

    Lubos
    Hello, I've got TMP102 breakout PCB where ALARM pin is left unconnected (no pullup). I'm not going to use ALERT pin anyway, but does it any impact on communication via TWI bus? I've tried to communicate with the TMP102, but without any response. So, I'm trying to find where can be...
    on Apr 7, 2010

  • Forum Post: Re: TMP275 addressing

    Collin Wells
    Hello Martin, The behavior you have described does not match what I would expect for the TMP275. Could you please send a couple of scope captures showing a working communication sequence, for example when the part is configured for address 0x49 (A2 = 0, A1 = 0, A0 = 1)? Then please also show the sequences...
    on Nov 10, 2010

  • Forum Post: Re: Any advise in using a digital temp. sensor in a "noisy" environment for 3 meter long stretches?

    Ian Williams
    Hello Steve, The effects of noise and stray capacitance can be reduced by using shielded cables with the shields connected to GND, but as a rule we don't recommend running I2C signals over lengths greater than 1m. I agree with Jayant's suggestion to read the I2C data with a micro and convert...
    on Jun 24, 2011

  • Forum Post: Re: TMP100 problems and questions

    Ian Williams
    Hello Vinicius, The resolution bits R1 and R0 of the Configuration Register should not change after reading the temperature register. The only time the Configuration Register changes automatically is after a power-up/reset. Can you please share the block of code you use when reading from the temperature...
    on Aug 9, 2011

  • Forum Post: help for IC /..!!!

    brijesh patel
    i require the temperature ic with DIP package as it can be useful in breadboard interface...!! so pls ..any 1 can help me to find it in TI..!!!
    on Aug 31, 2011

  • Forum Post: LM75A vs LM75B and LM75C device identification

    Emmy Denton
    Question: LM75-A has a product ID that can be read but the LM75B and LM75C do not. If we read this product ID on LM75-C w/ I2C reading process, because LM75-C does not have this register, how will the LM75-C respond? Will I2C be locked by LM75-C? Answer: For the LM75C there are keeper cells on the...
    on Dec 8, 2011

  • Forum Post: Re: tmp006 suitability

    Ian Williams
    Hello Jim, The TMP006 itself should function without issue in a noisy environment as long as our recommended layout is used. The real concern is that the power supply's switching noise can couple into the digital communications lines and cause difficulties when reading from/writing to the device...
    on Dec 12, 2011

  • Forum Post: Re: tmp423 sample code

    Ian Williams
    Tim, We currently have no sample code available for the TMP423. I apologize for the inconvenience. Bruce, The TMP103EVM has test points for the SDA and SCL lines which would allow you to easily probe the I 2 C signals. You can order one at: https://estore.ti.com/TMP103EVM-TMP103-Evaluation-Module...
    on Jan 3, 2012

  • Forum Post: Re: Test Setup for TMP112 using TI Serial Bus Evaluation Module

    Ian Williams
    Hello Wyman, Thanks for your interest in the TMP112. It is important that you wire your circuit properly on the Interface Test Board in order to communicate successfully over I 2 C. Before attempting communications, make sure that you have done the following: Connect TMP112 pin 1 (SCL) to Interface...
    on Jan 19, 2012

  • Forum Post: Re: TMP006 voltages

    Ian Patterson
    Thank you Ian, You did indeed answer my question - my apologies to the Forum for my tardiness in verifying the answer and my thanks to you for doing it for me. This "reply" is more of a footnote to my question and your answer. Texas Instruments makes a neat I2C bidirectional level translator...
    on Jan 29, 2012

  • Forum Post: Re: tmp101

    Ian Williams
    Hello Nick, Yes, each read/write to one of the TMP101 registers is considered one communication transaction, so to write to the Configuration register, T LOW register, and T HIGH register you would need to do three consecutive register writes. Each write would follow the same format as shown below...
    on Jan 31, 2012

  • Forum Post: Re: tmp101

    Ian Williams
    Hello Nick, This is the format for a register read. It’s similar to a register write, but a little more involved since you have to address the TMP101 twice – once with the R/W bit LOW when you’re writing to the pointer register, and once with the R/W bit HIGH when you’re actually...
    on Feb 1, 2012

  • Forum Post: LM96080 fully compatible with LM80?

    Gabriel Perez
    Hello, My question is basically centered around the fact that ADC values stored for the LM96080 are 10bit long vs 8bits in the LM80. I'm trying to figure out how the part maintains SW compatibility given the that the width of the returned data (expected) is 10 and not 8. The only thing...
    on Mar 29, 2012

  • Forum Post: LM95234 Common Status Register reads

    Kenneth Ocheltree
    We are using the LM95234 and are seeing errors on reads of the Common Status Register over I2C. As a test case, we set up the Command Byte to be 0x02 and repeatedly read the Command Status Register. For successful reads, we get 0x01 returned from the Common Status Register. About once every 100k reads...
    on Apr 20, 2012

  • Forum Post: TMP512 I2C bus compatible

    Carlos C.
    Hello, I want to use the TMP512 with an OMAP5910's I2C bus. In the TI web's folder of the TMP512 appears to be compatible with the Standard I2C, but in the datasheet doesnt appear that funcionality (with the name I2C). My question, Is compatible TMP512 with the standard I2C protocol and...
    on May 15, 2012

  • Forum Post: TMP513 I2C Code Example

    Andres Gomez
    Hi, Could anyone point me to a C or C++ example for TMP513 I2C ? Thanks!
    on Aug 8, 2012

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