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TMP112
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  • Forum Post: TMP112,can't get the date of temperature

    Biqing Li
    #include<pic.h> #define uchar unsigned char #define uint unsigned int __CONFIG(UNPROTECT & BOREN & MCLRDIS & PWRTEN & WDTDIS & INTOSCIO); #define SDA RC0 #define SCL RC1 #define SDA_DIR TRISC0 #define SCL_DIR TRISC1 #define SDA_HIGH() SDA_DIR=1 #define SDA_LOW() SDA_DIR=0 #define...
    on Apr 13, 2010

  • Forum Post: General Address acquire command

    Joerg Krause
    Hello community, the datasheet for the temperature sensor TMP112 says the following: " The TMP112 does not support the General Address acquire command. " What does the aquire command mean? Greetings Joerg
    on Apr 27, 2010

  • Forum Post: Shutdown mode and current consumption of TMP112

    Joerg Krause
    Hello TI community, I have a question about the Shutdown mode of the TMP112 and the current consumption in this mode. If I set the Shutdown bit together with the One-Shot bit in the configuration register a conversion starts. The conversion tooks about 26 ms. The active part consumes about 40...
    on May 18, 2010

  • Forum Post: TMP112 Alert pin to ground

    Sergio62851
    Hello Will the TMP112 work if the ALERT pin is connected to ground, GND? I'm not planning on using the alert function, I just want to read temperature. Thank you, Sergio
    on Dec 16, 2010

  • Forum Post: TMP112 Read problem

    Alexander Frank
    Hello, I have a problem to read the correct temperature data of the TMP112. If I read the configuration register(picture1), I will get the right answer. Now I set the pointer register to the temperature register. After that I will read this temp. data. But, what I get is this (picure2): ...
    on Aug 17, 2011

  • Forum Post: Re: TMP112 dynamically changing the higher and lower threshold value

    Ian Williams
    Hello Sanjat, When the TMP112 is in Interrupt mode (TM=1), the interrupt becomes active in a cyclical fashion as shown in Figure 13 below and as described in the section HIGH- AND LOW-LIMIT REGISTERS . In order for an interrupt to occur, the part must first read a temperature equal to or greater...
    on Nov 8, 2011

  • Forum Post: Re: TMP112 Brownout

    Ian Williams
    Hello Trish, I'll check with the designers for this data. Best regards, Ian Williams Linear Applications Engineer Precision Linear and Sensing Products
    on Nov 11, 2011

  • Forum Post: Re: TMP112 Brownout

    Ian Williams
    Hello again Trish, The average power-on reset values for the TMP112, including tolerances caused by part-to-part variation, are as follows: -40°C = 0.97V ± 0.07V 25°C = 0.87V ± 0.04V 125°C = 0.77V ± 0.06V Specifying the minimum low-voltage glitch...
    on Nov 14, 2011

  • Forum Post: Re: TMP112 Read problem

    Ian Williams
    Alex, Based on your scope capture, you are reading a value of 00011010 10110000 (427 in decimal), which corresponds to 26.6875°C given that 1 LSB is equal to 0.0625°C. That value is not far off from room temperature. You say the data is repeating - does it not change if you heat or cool the...
    on Jan 3, 2012

  • Forum Post: Re: TMP112 dynamically changing the higher and lower threshold value

    sanjat panigrahi
    hi Ian Williams, Thank you very much for your reply and cordial support. It was indeed a good solution but not very much useful for our application and product that we are trying to develop. Anyways, thank you very much. I have one more doubt regarding the functionality of the temperature sensor...
    on Jan 9, 2012

  • Forum Post: Re: TMP112 dynamically changing the higher and lower threshold value

    Ian Williams
    Hello Sanjat, The relationship between supply voltage and temperature error is given in the Electrical Characteristics table of the TMP112 data sheet. The maximum spec is an error of ±0.25°C/V when compared to +3.3V. This means that the temperature error due to supply voltage can only be...
    on Jan 9, 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: Power-supply error, calibration, and the TMP112?

    Lucas Thode
    I am currently planning on using the TMP112 on 3.3V in a dual supply (2.2V and 3.3V) application (a thermostat, to be precise). This, however, requires a PCA9306 to translate the I2C bus levels. I noted the formula in the TMP112 datasheet for computing the error caused by using the TMP112 on non 3.3V...
    on Sep 27, 2012

  • Forum Post: RE: Power-supply error, calibration, and the TMP112?

    Chris Featherstone
    Lucas, The calibration method in the datasheet is a baseline to start with. If you deviate away from V Supply = 3.3V the calibration method can still be applied. Please be aware that there is additional error added as the supply voltage deviates away from the specified 3.3V. Please see the attached...
    on Sep 27, 2012

  • Forum Post: RE: TMP275's accuracy

    Douglas Alden
    Chris, There was a Analog Wire blog post from 21 Feb 2010 about the TMP112 that discussed how the accuracy of the TMP112 could be improved by performing a single point calibration at 25C. See: http://e2e.ti.com/blogs_/b/analogwire/archive/2010/02/21/cool-alternatives-to-thermistor-based-designs.aspx...
    on Oct 25, 2012

  • Forum Post: TMP112 / I2C

    Ran Feldman
    Hi, I noticed that the TMP112 supports SMBus and 2-Wire Interface. Not I2C. I wanted to ask what should be done, or what shouldnt be done in order that the TMP112 could be added to an existing I2C bus that operates from 3.3V. Thanks, Rani
    on Nov 14, 2012

  • Forum Post: RE: IC's for battery operated wireless temperature sensor unit

    DHarmon
    Richard, Unfortunately none of our sensors can achieve ±0.1°C accuracy. The TMP112 is our most accurate contact temperature sensor - it measures the temperature of what it is attached to. It can acheive less than ±0.5°C accuracy via calibration as described on page 16 in the...
    on Dec 18, 2012

  • Forum Post: RE: IC's for battery operated wireless temperature sensor unit

    DHarmon
    Richard, Resolution is the internal ADC °C/LSB while accuracy is over the full temp range the "error" in the output relative to the "real" temperature of the object being measured.
    on Dec 18, 2012

  • Forum Post: RE: IC's for battery operated wireless temperature sensor unit

    DHarmon
    Unfortunately, I am not a wireless guy... TI has a low energy bluetooth " Sensor Tag " solution that uses one of our other temperature sensors, but the same basic concept would apply. Other than that I would recommend reviewing TI's Wireless Product Selection for a device that may meet...
    on Dec 18, 2012

  • Forum Post: tmp112 i2c with cc1101 spi

    Erkan Ersoy
    Hello I am planing to use tmp112 with pic mcu. spi is shared with i2c interface. i want to use hardware i2c so i need to wire them parallel. In pic i2c open draini so i need to use pull ups. As i seached through tmp112 datasheet there is no chip select pin. So my question is will i face troubles about...
    on Mar 29, 2013

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