connection of a thermal sensor TC1047AVNBTR to the microcontroller MSP430F4618 - Page 1
Forum section: electronics / beginners

author: Alex9
author_rank: Contributor
timestamp: September 03, 2013, 03:56:59 pm
content: Where I can get the diagram of connection of a thermal sensor TC1047AVNBTR to the ADC of microcontroller MSP430F4618 ? Also interestingly, on what formulas it calculate ? Thank you.

author: David_AVD
author_rank: Super Contributor
timestamp: September 03, 2013, 10:02:52 pm
content: Sounds like homework?

author: c4757p
author_rank: Super Contributor
timestamp: September 03, 2013, 10:22:10 pm
content: It has three pins. What kind of diagram do you expect?RTFDS.

author: MacAttak
author_rank: Unknown
timestamp: September 04, 2013, 01:32:08 am
content: He asked for a diagram of how to connect it to a MSP430, not a PIC

author: Alex9
author_rank: Contributor
timestamp: September 04, 2013, 01:24:25 pm
content: I have MSP430F4618 only. I read its datasheets. Complexity of a question in development of the scheme of connection of the sensor to microcontroller ADC.

author: M. András
author_rank: Super Contributor
timestamp: September 04, 2013, 08:04:24 pm
content: it has voltage output i guess then the adc in the micro just reads its value

author: Alex9
author_rank: Contributor
timestamp: September 05, 2013, 06:36:02 am
content: How to connect this sensor through the bridge of Witson with compensating? In the bridge of 2 jumpers it is required, and at the sensor 3 pins.

author: M. András
author_rank: Super Contributor
timestamp: September 05, 2013, 07:58:32 am
content: hard homework right?

author: AndrejaKo
author_rank: Frequent Contributor
timestamp: September 05, 2013, 10:09:34 am
content: Quote from: Alex9 on September 05, 2013, 06:36:02 amIf you want help, please explain what it is exactly that you want to do. If you think you have a partial solution, please provide schematic, so that we may know what it is that you're thinking. Did you read the datasheet of the sensor? If yes, why yes, if no, why no?What type of voltage output does the sensor provide? You mentioned formula for calculations. It should be obvious from the datasheet.What is this "bridge of Witson"? Could it be Wheatstone bridge? If yes, then keep in mind that it's used to measure resistance. Would it be useful for measuring output that the sensor is providing? If yes, why yes, if no, why no?If we just give you the solution, we'll accomplish nothing. You need to explain to us how you are thinking so that we may explain to you what you're doing wrong.

author: fcb
author_rank: Super Contributor
timestamp: September 05, 2013, 09:45:07 pm
content: Two classics in this thread:Quote from: c4757p on September 03, 2013, 10:22:10 pmQuote from: Alex9 on September 05, 2013, 06:36:02 am

author: Alex9
author_rank: Contributor
timestamp: September 06, 2013, 04:08:08 pm
content: I clarified that such sensor can't be connected by means of the bridge, because it the active. Also on my microcontroller there is a supply pinch (tension to 5 volt is programmed, and it is necessary for the sensor 3). Whether it is necessary to set the power conditioner and the filter in case of such connection? I saw the diagram in the sensor document - one pin on the grounding, one on a supply and one to the microcontroller. What it is possible to add in this diagram and whether there is a need something to add?

author: AndrejaKo
author_rank: Frequent Contributor
timestamp: September 06, 2013, 05:02:12 pm
content: It's nice to see you making progress.The need for filtering elements depends (from my experience at least) on the general noisiness of power supply and on the amount of noise you can tolerate on the output.I'm still not sure if you have a printed circuit board with sensor already mounted or if you're designing one for yourself or if you're trying to make this work on a prototype board....In case you're designing a circuit board yourself, here's what I'd do: I'd make the connection from the sensor to the power supply via a 0 ohm resistor near the sensor and I'd provide a footprint for a capacitor from power supply pin to ground. This makes a convenient location to place an RC low pass filter.Then I'd try to run the board with no filtering at all and see how it works. If it doesn't work good enough, that is to say that there is a lot of noise on the output, I'd add remove the zero ohm resistor, replace it with a resistor with greater resistance and add a capacitor. Exact values depend on the frequencies you see on the noise.

author: David_AVD
author_rank: Super Contributor
timestamp: September 06, 2013, 10:20:58 pm
content: Yes, some clarification of what boards (development or your own) you're using would help immensely. At present nobody (but you) has any idea what the hardware is.

author: Alex9
author_rank: Contributor
timestamp: September 07, 2013, 11:54:20 am
content: My microcontroller is set on the experimental boardhttp://www.ti.com/tool/msp-exp430fg4618.I would like to have the general supply of the sensor with the microcontroller, but for supply option from batteries didn't find information in board documentation about stabilizator and filter existence between batteries and the microcontroller that it was possible to be connected to a pure signal. Prompt according to the diagram on page 18 of the user guide of a board - whether there is there a stabilizator and the filter? Or it is possible to connect the sensor to a pinch of the 100th microcontroller, without using the stabilizator and the filter? Whether the additional reference supply source is required for microcontroller ADC12 ? Thank you.

author: David_AVD
author_rank: Super Contributor
timestamp: September 07, 2013, 12:20:26 pm
content: I have zero experience with the TI stuff, but...It seems like you can connect the Vcc (V+) pin of the TC1047 to the Vcc rail (5V or 3.3V) on the MSP dev board. Also connect the two 0V lines together.I'm guessing that the TC1047 puts out a voltage between 0V and Vcc. Does the MSP board accept an analogue voltage in that range? If so, connect it up.